/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/unroll-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:21:43,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:21:43,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:21:43,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:21:43,657 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 21:21:43,676 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:21:43,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:21:43,676 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:21:43,676 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:21:43,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:21:43,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:21:43,677 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:21:43,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:21:43,678 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:21:43,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:21:43,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:21:43,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:21:43,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:21:43,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:21:43,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:21:43,679 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:21:43,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:21:43,679 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:21:43,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:21:43,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:21:43,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:21:43,679 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:21:43,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:21:43,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:21:43,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:21:43,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:21:43,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:21:43,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:21:43,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:21:43,680 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:21:43,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:21:43,680 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:21:43,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:21:43,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:21:43,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:21:43,956 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:21:43,957 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:21:43,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl [2021-06-05 21:21:43,957 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl' [2021-06-05 21:21:43,987 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:21:43,989 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:21:43,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:21:43,990 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:21:43,990 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:21:44,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:21:43" (1/1) ... [2021-06-05 21:21:44,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:21:43" (1/1) ... [2021-06-05 21:21:44,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:21:44,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:21:44,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:21:44,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:21:44,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:21:43" (1/1) ... [2021-06-05 21:21:44,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:21:43" (1/1) ... [2021-06-05 21:21:44,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:21:43" (1/1) ... [2021-06-05 21:21:44,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:21:43" (1/1) ... [2021-06-05 21:21:44,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:21:43" (1/1) ... [2021-06-05 21:21:44,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:21:43" (1/1) ... [2021-06-05 21:21:44,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:21:43" (1/1) ... [2021-06-05 21:21:44,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:21:44,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:21:44,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:21:44,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:21:44,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:21:43" (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 21:21:44,097 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:21:44,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:21:44,097 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:21:44,097 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:21:44,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:21:44,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:21:44,098 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:21:44,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:21:44,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:21:44,099 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 21:21:44,289 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:21:44,290 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 21:21:44,305 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 21:21:44,306 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 21:21:44,307 INFO L202 PluginConnector]: Adding new model unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:21:44 BoogieIcfgContainer [2021-06-05 21:21:44,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:21:44,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:21:44,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:21:44,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:21:44,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:21:43" (1/2) ... [2021-06-05 21:21:44,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e64434 and model type unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:21:44, skipping insertion in model container [2021-06-05 21:21:44,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:21:44" (2/2) ... [2021-06-05 21:21:44,312 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.bpl [2021-06-05 21:21:44,316 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:21:44,316 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:21:44,317 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:21:44,317 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:21:44,379 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 21:21:44,402 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 21:21:44,417 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:21:44,417 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:21:44,417 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:21:44,418 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:21:44,418 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:21:44,418 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:21:44,418 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:21:44,418 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:21:44,425 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-05 21:21:44,432 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:44,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 21:21:44,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:44,441 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:44,441 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:44,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1034851945, now seen corresponding path program 1 times [2021-06-05 21:21:44,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:44,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144706720] [2021-06-05 21:21:44,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:44,608 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 21:21:44,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:44,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144706720] [2021-06-05 21:21:44,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144706720] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:21:44,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:21:44,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 21:21:44,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885661983] [2021-06-05 21:21:44,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 21:21:44,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:44,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 21:21:44,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:21:44,634 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:44,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:44,668 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-06-05 21:21:44,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 21:21:44,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-05 21:21:44,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:44,682 INFO L225 Difference]: With dead ends: 22 [2021-06-05 21:21:44,682 INFO L226 Difference]: Without dead ends: 19 [2021-06-05 21:21:44,683 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:21:44,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-06-05 21:21:44,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-06-05 21:21:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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 21:21:44,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-06-05 21:21:44,713 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-06-05 21:21:44,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:44,713 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-06-05 21:21:44,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:44,714 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-06-05 21:21:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 21:21:44,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:44,715 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:44,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:21:44,716 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:44,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:44,721 INFO L82 PathProgramCache]: Analyzing trace with hash -619637623, now seen corresponding path program 1 times [2021-06-05 21:21:44,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:44,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959494222] [2021-06-05 21:21:44,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:44,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:44,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959494222] [2021-06-05 21:21:44,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959494222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:44,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967087886] [2021-06-05 21:21:44,795 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 21:21:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:44,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 21:21:44,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:44,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967087886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:44,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:44,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 21:21:44,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070005782] [2021-06-05 21:21:44,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:21:44,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:44,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:21:44,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:21:44,933 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:44,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:44,975 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-06-05 21:21:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:21:44,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 21:21:44,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:44,977 INFO L225 Difference]: With dead ends: 28 [2021-06-05 21:21:44,977 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 21:21:44,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:21:44,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 21:21:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-06-05 21:21:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-06-05 21:21:44,990 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-06-05 21:21:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:44,990 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-06-05 21:21:44,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-06-05 21:21:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 21:21:44,992 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:44,993 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:45,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 21:21:45,209 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:45,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:45,210 INFO L82 PathProgramCache]: Analyzing trace with hash 2038710898, now seen corresponding path program 1 times [2021-06-05 21:21:45,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:45,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791001308] [2021-06-05 21:21:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:45,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:45,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791001308] [2021-06-05 21:21:45,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791001308] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:21:45,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:21:45,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:21:45,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409456252] [2021-06-05 21:21:45,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:21:45,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:45,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:21:45,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:21:45,243 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:45,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:45,283 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-06-05 21:21:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:21:45,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 21:21:45,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:45,289 INFO L225 Difference]: With dead ends: 22 [2021-06-05 21:21:45,289 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 21:21:45,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:21:45,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 21:21:45,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 21:21:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-06-05 21:21:45,293 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-06-05 21:21:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:45,293 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-06-05 21:21:45,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-06-05 21:21:45,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 21:21:45,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:45,294 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:45,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 21:21:45,294 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:45,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:45,295 INFO L82 PathProgramCache]: Analyzing trace with hash 298365290, now seen corresponding path program 2 times [2021-06-05 21:21:45,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:45,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886807433] [2021-06-05 21:21:45,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:45,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:45,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886807433] [2021-06-05 21:21:45,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886807433] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:21:45,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:21:45,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:21:45,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360377668] [2021-06-05 21:21:45,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:21:45,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:45,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:21:45,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:21:45,330 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:45,350 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-06-05 21:21:45,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:21:45,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 21:21:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:45,352 INFO L225 Difference]: With dead ends: 20 [2021-06-05 21:21:45,352 INFO L226 Difference]: Without dead ends: 20 [2021-06-05 21:21:45,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:21:45,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-06-05 21:21:45,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-06-05 21:21:45,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:45,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-05 21:21:45,362 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-05 21:21:45,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:45,362 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-05 21:21:45,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-05 21:21:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 21:21:45,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:45,363 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:45,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 21:21:45,364 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:45,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:45,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2005825454, now seen corresponding path program 1 times [2021-06-05 21:21:45,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:45,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167973004] [2021-06-05 21:21:45,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:45,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:45,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167973004] [2021-06-05 21:21:45,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167973004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:45,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031821249] [2021-06-05 21:21:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:45,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:21:45,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:45,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031821249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:45,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:45,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 21:21:45,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143721246] [2021-06-05 21:21:45,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:21:45,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:45,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:21:45,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:21:45,509 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:45,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:45,527 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-06-05 21:21:45,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:21:45,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 21:21:45,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:45,529 INFO L225 Difference]: With dead ends: 24 [2021-06-05 21:21:45,529 INFO L226 Difference]: Without dead ends: 24 [2021-06-05 21:21:45,529 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:21:45,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-06-05 21:21:45,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-06-05 21:21:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-06-05 21:21:45,536 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-06-05 21:21:45,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:45,537 INFO L482 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-06-05 21:21:45,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:45,537 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-06-05 21:21:45,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:21:45,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:45,538 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:45,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:45,745 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:45,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:45,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1462566514, now seen corresponding path program 2 times [2021-06-05 21:21:45,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:45,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673969503] [2021-06-05 21:21:45,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:45,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:45,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673969503] [2021-06-05 21:21:45,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673969503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:45,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064533871] [2021-06-05 21:21:45,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:45,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:21:45,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:45,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:21:45,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:45,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064533871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:45,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:45,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 21:21:45,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799591964] [2021-06-05 21:21:45,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:21:45,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:45,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:21:45,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:21:45,883 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 21:21:45,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:45,907 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-06-05 21:21:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:21:45,908 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 12 [2021-06-05 21:21:45,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:45,908 INFO L225 Difference]: With dead ends: 28 [2021-06-05 21:21:45,909 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 21:21:45,909 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:21:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 21:21:45,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-06-05 21:21:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-06-05 21:21:45,912 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-06-05 21:21:45,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:45,912 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-06-05 21:21:45,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 21:21:45,913 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-06-05 21:21:45,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:21:45,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:45,913 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:46,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:46,133 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:46,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1608535122, now seen corresponding path program 3 times [2021-06-05 21:21:46,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:46,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760192774] [2021-06-05 21:21:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:46,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:46,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760192774] [2021-06-05 21:21:46,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760192774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:46,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133070581] [2021-06-05 21:21:46,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:46,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:21:46,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:46,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:46,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:46,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:21:46,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:21:46,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:21:46,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:21:46,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:21:46,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 21:21:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:46,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133070581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:46,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:46,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 21:21:46,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653999855] [2021-06-05 21:21:46,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:21:46,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:46,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:21:46,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:21:46,438 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:46,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:46,483 INFO L93 Difference]: Finished difference Result 67 states and 119 transitions. [2021-06-05 21:21:46,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:21:46,484 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:21:46,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:46,484 INFO L225 Difference]: With dead ends: 67 [2021-06-05 21:21:46,484 INFO L226 Difference]: Without dead ends: 64 [2021-06-05 21:21:46,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:21:46,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-05 21:21:46,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 39. [2021-06-05 21:21:46,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:46,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 82 transitions. [2021-06-05 21:21:46,489 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 82 transitions. Word has length 13 [2021-06-05 21:21:46,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:46,489 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 82 transitions. [2021-06-05 21:21:46,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:46,490 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 82 transitions. [2021-06-05 21:21:46,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:21:46,490 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:46,490 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:46,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:46,705 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:46,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:46,705 INFO L82 PathProgramCache]: Analyzing trace with hash -942907630, now seen corresponding path program 4 times [2021-06-05 21:21:46,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:46,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014855730] [2021-06-05 21:21:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:46,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:46,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014855730] [2021-06-05 21:21:46,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014855730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:46,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789051975] [2021-06-05 21:21:46,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:46,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:21:46,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:46,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:46,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:46,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:21:46,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:21:46,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:21:46,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:21:46,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:21:46,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 21:21:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:46,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789051975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:46,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:46,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 21:21:46,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68206400] [2021-06-05 21:21:46,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:21:46,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:46,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:21:46,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:21:46,891 INFO L87 Difference]: Start difference. First operand 39 states and 82 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:46,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:46,938 INFO L93 Difference]: Finished difference Result 75 states and 144 transitions. [2021-06-05 21:21:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:21:46,938 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:21:46,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:46,939 INFO L225 Difference]: With dead ends: 75 [2021-06-05 21:21:46,939 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 21:21:46,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:21:46,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 21:21:46,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 45. [2021-06-05 21:21:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 103 transitions. [2021-06-05 21:21:46,944 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 103 transitions. Word has length 13 [2021-06-05 21:21:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:46,945 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 103 transitions. [2021-06-05 21:21:46,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 103 transitions. [2021-06-05 21:21:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:21:46,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:46,946 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:47,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 21:21:47,169 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:47,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:47,170 INFO L82 PathProgramCache]: Analyzing trace with hash -317115318, now seen corresponding path program 5 times [2021-06-05 21:21:47,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:47,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229429166] [2021-06-05 21:21:47,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:47,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:47,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229429166] [2021-06-05 21:21:47,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229429166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:47,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135171415] [2021-06-05 21:21:47,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:47,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:21:47,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:47,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:47,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:47,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:21:47,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:21:47,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:21:47,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:21:47,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:21:47,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 21:21:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:47,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135171415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:47,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:47,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 21:21:47,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302409264] [2021-06-05 21:21:47,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:21:47,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:47,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:21:47,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:21:47,374 INFO L87 Difference]: Start difference. First operand 45 states and 103 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:47,427 INFO L93 Difference]: Finished difference Result 83 states and 169 transitions. [2021-06-05 21:21:47,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:21:47,427 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:21:47,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:47,428 INFO L225 Difference]: With dead ends: 83 [2021-06-05 21:21:47,428 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 21:21:47,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:21:47,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 21:21:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-06-05 21:21:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2021-06-05 21:21:47,444 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 13 [2021-06-05 21:21:47,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:47,444 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2021-06-05 21:21:47,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:47,444 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2021-06-05 21:21:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:21:47,445 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:47,445 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:47,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:47,646 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:47,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:47,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1902577170, now seen corresponding path program 6 times [2021-06-05 21:21:47,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:47,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146656526] [2021-06-05 21:21:47,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:47,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:47,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146656526] [2021-06-05 21:21:47,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146656526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:47,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378093247] [2021-06-05 21:21:47,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:47,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:21:47,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:47,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:47,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:47,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:21:47,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 21:21:47,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:21:47,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:21:47,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:21:47,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 21:21:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:47,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378093247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:47,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:47,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 21:21:47,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158037285] [2021-06-05 21:21:47,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:21:47,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:47,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:21:47,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:21:47,836 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:47,910 INFO L93 Difference]: Finished difference Result 92 states and 197 transitions. [2021-06-05 21:21:47,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:21:47,911 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:21:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:47,912 INFO L225 Difference]: With dead ends: 92 [2021-06-05 21:21:47,912 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 21:21:47,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:21:47,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 21:21:47,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2021-06-05 21:21:47,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5833333333333335) internal successors, (155), 60 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:47,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 155 transitions. [2021-06-05 21:21:47,916 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 155 transitions. Word has length 13 [2021-06-05 21:21:47,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:47,917 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 155 transitions. [2021-06-05 21:21:47,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:47,917 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 155 transitions. [2021-06-05 21:21:47,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:21:47,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:47,918 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:48,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 21:21:48,135 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:48,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:48,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1838594674, now seen corresponding path program 7 times [2021-06-05 21:21:48,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:48,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113486294] [2021-06-05 21:21:48,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:48,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:48,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113486294] [2021-06-05 21:21:48,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113486294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:48,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824469417] [2021-06-05 21:21:48,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:48,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:48,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:48,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824469417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:48,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:48,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:21:48,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529695219] [2021-06-05 21:21:48,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:21:48,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:48,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:21:48,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:21:48,317 INFO L87 Difference]: Start difference. First operand 61 states and 155 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 21:21:48,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:48,409 INFO L93 Difference]: Finished difference Result 114 states and 226 transitions. [2021-06-05 21:21:48,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:21:48,409 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14 [2021-06-05 21:21:48,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:48,410 INFO L225 Difference]: With dead ends: 114 [2021-06-05 21:21:48,411 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 21:21:48,411 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:21:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 21:21:48,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 62. [2021-06-05 21:21:48,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.6065573770491803) internal successors, (159), 61 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:48,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 159 transitions. [2021-06-05 21:21:48,429 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 159 transitions. Word has length 14 [2021-06-05 21:21:48,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:48,430 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 159 transitions. [2021-06-05 21:21:48,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 21:21:48,430 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 159 transitions. [2021-06-05 21:21:48,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:21:48,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:48,431 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:48,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 21:21:48,631 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:48,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:48,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1651947095, now seen corresponding path program 8 times [2021-06-05 21:21:48,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:48,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337051488] [2021-06-05 21:21:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:48,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:48,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337051488] [2021-06-05 21:21:48,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337051488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:48,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206079520] [2021-06-05 21:21:48,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:48,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:21:48,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:48,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:48,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:48,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206079520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:48,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:48,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:21:48,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583843262] [2021-06-05 21:21:48,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:21:48,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:48,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:21:48,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:21:48,757 INFO L87 Difference]: Start difference. First operand 62 states and 159 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 21:21:48,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:48,888 INFO L93 Difference]: Finished difference Result 121 states and 252 transitions. [2021-06-05 21:21:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:21:48,888 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14 [2021-06-05 21:21:48,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:48,889 INFO L225 Difference]: With dead ends: 121 [2021-06-05 21:21:48,889 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 21:21:48,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:21:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 21:21:48,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-06-05 21:21:48,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.5945945945945947) internal successors, (192), 74 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2021-06-05 21:21:48,893 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 14 [2021-06-05 21:21:48,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:48,893 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2021-06-05 21:21:48,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 21:21:48,893 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2021-06-05 21:21:48,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:21:48,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:48,894 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:49,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:49,117 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:49,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:49,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1032606612, now seen corresponding path program 9 times [2021-06-05 21:21:49,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:49,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635637762] [2021-06-05 21:21:49,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:49,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:49,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635637762] [2021-06-05 21:21:49,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635637762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:49,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166861576] [2021-06-05 21:21:49,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:49,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:21:49,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:49,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:21:49,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:49,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166861576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:49,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:49,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 21:21:49,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104330785] [2021-06-05 21:21:49,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:21:49,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:49,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:21:49,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:21:49,289 INFO L87 Difference]: Start difference. First operand 75 states and 192 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:49,566 INFO L93 Difference]: Finished difference Result 137 states and 314 transitions. [2021-06-05 21:21:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:21:49,567 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:21:49,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:49,568 INFO L225 Difference]: With dead ends: 137 [2021-06-05 21:21:49,568 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 21:21:49,569 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 189.6ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:21:49,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 21:21:49,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2021-06-05 21:21:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.6116504854368934) internal successors, (269), 103 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 269 transitions. [2021-06-05 21:21:49,578 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 269 transitions. Word has length 14 [2021-06-05 21:21:49,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:49,580 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 269 transitions. [2021-06-05 21:21:49,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:49,580 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 269 transitions. [2021-06-05 21:21:49,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:21:49,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:49,584 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:49,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:49,808 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:49,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:49,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1949662965, now seen corresponding path program 10 times [2021-06-05 21:21:49,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:49,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628790513] [2021-06-05 21:21:49,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:49,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:49,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628790513] [2021-06-05 21:21:49,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628790513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:49,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746474832] [2021-06-05 21:21:49,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:49,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:21:49,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:49,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:49,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:49,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746474832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:49,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:49,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:21:49,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624878168] [2021-06-05 21:21:49,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:21:49,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:49,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:21:49,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:21:49,942 INFO L87 Difference]: Start difference. First operand 104 states and 269 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:21:49,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:49,980 INFO L93 Difference]: Finished difference Result 162 states and 349 transitions. [2021-06-05 21:21:49,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:21:49,981 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-06-05 21:21:49,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:49,982 INFO L225 Difference]: With dead ends: 162 [2021-06-05 21:21:49,982 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 21:21:49,982 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:21:49,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 21:21:49,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 105. [2021-06-05 21:21:49,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6153846153846154) internal successors, (272), 104 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:49,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 272 transitions. [2021-06-05 21:21:49,987 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 272 transitions. Word has length 14 [2021-06-05 21:21:49,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:49,987 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 272 transitions. [2021-06-05 21:21:49,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:21:49,987 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 272 transitions. [2021-06-05 21:21:49,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:21:49,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:49,988 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:50,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 21:21:50,205 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:50,205 INFO L82 PathProgramCache]: Analyzing trace with hash 857706217, now seen corresponding path program 11 times [2021-06-05 21:21:50,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:50,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306688643] [2021-06-05 21:21:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:50,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:50,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306688643] [2021-06-05 21:21:50,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306688643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:50,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387824065] [2021-06-05 21:21:50,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:50,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:21:50,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:50,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:50,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:50,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387824065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:50,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:50,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:21:50,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723509545] [2021-06-05 21:21:50,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:21:50,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:50,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:21:50,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:21:50,321 INFO L87 Difference]: Start difference. First operand 105 states and 272 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:21:50,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:50,415 INFO L93 Difference]: Finished difference Result 170 states and 369 transitions. [2021-06-05 21:21:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:21:50,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-06-05 21:21:50,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:50,417 INFO L225 Difference]: With dead ends: 170 [2021-06-05 21:21:50,417 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 21:21:50,417 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:21:50,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 21:21:50,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 112. [2021-06-05 21:21:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.6576576576576576) internal successors, (295), 111 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:50,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 295 transitions. [2021-06-05 21:21:50,422 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 295 transitions. Word has length 14 [2021-06-05 21:21:50,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:50,422 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 295 transitions. [2021-06-05 21:21:50,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:21:50,422 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 295 transitions. [2021-06-05 21:21:50,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:21:50,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:50,422 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:50,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 21:21:50,645 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:50,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:50,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1719512019, now seen corresponding path program 12 times [2021-06-05 21:21:50,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:50,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579888619] [2021-06-05 21:21:50,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:50,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:50,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579888619] [2021-06-05 21:21:50,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579888619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:50,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423668926] [2021-06-05 21:21:50,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:50,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:21:50,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:50,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:50,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:50,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423668926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:50,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:50,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:21:50,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986078835] [2021-06-05 21:21:50,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:21:50,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:50,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:21:50,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:21:50,753 INFO L87 Difference]: Start difference. First operand 112 states and 295 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:21:50,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:50,790 INFO L93 Difference]: Finished difference Result 174 states and 379 transitions. [2021-06-05 21:21:50,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:21:50,791 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-06-05 21:21:50,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:50,792 INFO L225 Difference]: With dead ends: 174 [2021-06-05 21:21:50,793 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 21:21:50,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:21:50,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 21:21:50,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 112. [2021-06-05 21:21:50,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.6576576576576576) internal successors, (295), 111 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:50,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 295 transitions. [2021-06-05 21:21:50,797 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 295 transitions. Word has length 14 [2021-06-05 21:21:50,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:50,797 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 295 transitions. [2021-06-05 21:21:50,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:21:50,797 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 295 transitions. [2021-06-05 21:21:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:21:50,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:50,798 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:51,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 21:21:51,005 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:51,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:51,005 INFO L82 PathProgramCache]: Analyzing trace with hash 846407943, now seen corresponding path program 13 times [2021-06-05 21:21:51,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:51,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932576649] [2021-06-05 21:21:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:51,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:51,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932576649] [2021-06-05 21:21:51,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932576649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:51,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906680767] [2021-06-05 21:21:51,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:51,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:51,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:51,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906680767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:51,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:51,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:21:51,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270455224] [2021-06-05 21:21:51,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:21:51,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:51,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:21:51,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:21:51,123 INFO L87 Difference]: Start difference. First operand 112 states and 295 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 21:21:51,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:51,188 INFO L93 Difference]: Finished difference Result 188 states and 405 transitions. [2021-06-05 21:21:51,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:21:51,190 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14 [2021-06-05 21:21:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:51,191 INFO L225 Difference]: With dead ends: 188 [2021-06-05 21:21:51,191 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 21:21:51,191 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:21:51,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 21:21:51,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 114. [2021-06-05 21:21:51,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.663716814159292) internal successors, (301), 113 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:51,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 301 transitions. [2021-06-05 21:21:51,195 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 301 transitions. Word has length 14 [2021-06-05 21:21:51,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:51,195 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 301 transitions. [2021-06-05 21:21:51,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 21:21:51,195 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 301 transitions. [2021-06-05 21:21:51,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:21:51,196 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:51,196 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:51,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:51,409 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:51,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:51,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1217568591, now seen corresponding path program 14 times [2021-06-05 21:21:51,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:51,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912787839] [2021-06-05 21:21:51,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:51,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:51,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912787839] [2021-06-05 21:21:51,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912787839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:51,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325558478] [2021-06-05 21:21:51,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:51,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:21:51,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:51,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:51,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:51,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325558478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:51,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:51,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:21:51,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366798759] [2021-06-05 21:21:51,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:21:51,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:51,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:21:51,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:21:51,505 INFO L87 Difference]: Start difference. First operand 114 states and 301 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:21:51,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:51,577 INFO L93 Difference]: Finished difference Result 182 states and 405 transitions. [2021-06-05 21:21:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:21:51,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-06-05 21:21:51,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:51,578 INFO L225 Difference]: With dead ends: 182 [2021-06-05 21:21:51,578 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 21:21:51,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:21:51,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 21:21:51,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 124. [2021-06-05 21:21:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-06-05 21:21:51,583 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-06-05 21:21:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:51,583 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-06-05 21:21:51,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:21:51,583 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-06-05 21:21:51,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:21:51,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:51,584 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:51,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 21:21:51,807 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:51,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:51,807 INFO L82 PathProgramCache]: Analyzing trace with hash 500180469, now seen corresponding path program 15 times [2021-06-05 21:21:51,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:51,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786145116] [2021-06-05 21:21:51,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:51,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:51,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786145116] [2021-06-05 21:21:51,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786145116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:51,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108157501] [2021-06-05 21:21:51,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:51,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:21:51,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:51,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:51,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:51,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108157501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:51,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:51,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 21:21:51,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412252626] [2021-06-05 21:21:51,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:21:51,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:51,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:21:51,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:21:51,912 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:21:51,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:51,947 INFO L93 Difference]: Finished difference Result 185 states and 412 transitions. [2021-06-05 21:21:51,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:21:51,947 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14 [2021-06-05 21:21:51,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:51,948 INFO L225 Difference]: With dead ends: 185 [2021-06-05 21:21:51,948 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 21:21:51,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:21:51,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 21:21:51,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 124. [2021-06-05 21:21:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:51,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-06-05 21:21:51,952 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-06-05 21:21:51,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:51,953 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-06-05 21:21:51,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 21:21:51,953 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-06-05 21:21:51,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:21:51,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:51,953 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:52,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:52,173 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:52,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:52,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1228866865, now seen corresponding path program 16 times [2021-06-05 21:21:52,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:52,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546386828] [2021-06-05 21:21:52,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:52,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:52,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546386828] [2021-06-05 21:21:52,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546386828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:52,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257441359] [2021-06-05 21:21:52,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:52,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:21:52,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:52,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:52,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:52,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257441359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:52,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:52,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:21:52,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613959109] [2021-06-05 21:21:52,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:21:52,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:52,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:21:52,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:21:52,311 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 21:21:52,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:52,380 INFO L93 Difference]: Finished difference Result 194 states and 429 transitions. [2021-06-05 21:21:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:21:52,380 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14 [2021-06-05 21:21:52,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:52,381 INFO L225 Difference]: With dead ends: 194 [2021-06-05 21:21:52,381 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 21:21:52,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:21:52,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 21:21:52,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 124. [2021-06-05 21:21:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.707317073170732) internal successors, (333), 123 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:52,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 333 transitions. [2021-06-05 21:21:52,385 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 333 transitions. Word has length 14 [2021-06-05 21:21:52,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:52,386 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 333 transitions. [2021-06-05 21:21:52,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 21:21:52,386 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 333 transitions. [2021-06-05 21:21:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:21:52,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:52,386 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:52,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 21:21:52,609 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:52,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:52,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1005240629, now seen corresponding path program 17 times [2021-06-05 21:21:52,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:52,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055353522] [2021-06-05 21:21:52,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:52,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:52,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055353522] [2021-06-05 21:21:52,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055353522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:52,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017440623] [2021-06-05 21:21:52,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:52,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:21:52,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:52,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:52,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:52,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017440623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:52,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:52,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:21:52,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197647901] [2021-06-05 21:21:52,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:21:52,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:52,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:21:52,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:21:52,738 INFO L87 Difference]: Start difference. First operand 124 states and 333 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 21:21:52,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:52,828 INFO L93 Difference]: Finished difference Result 201 states and 462 transitions. [2021-06-05 21:21:52,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:21:52,828 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14 [2021-06-05 21:21:52,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:52,829 INFO L225 Difference]: With dead ends: 201 [2021-06-05 21:21:52,829 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 21:21:52,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:21:52,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 21:21:52,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 132. [2021-06-05 21:21:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.7404580152671754) internal successors, (359), 131 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 359 transitions. [2021-06-05 21:21:52,834 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 359 transitions. Word has length 14 [2021-06-05 21:21:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:52,834 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 359 transitions. [2021-06-05 21:21:52,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 21:21:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 359 transitions. [2021-06-05 21:21:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:21:52,835 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:52,835 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:53,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 21:21:53,057 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:53,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:53,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1126578199, now seen corresponding path program 18 times [2021-06-05 21:21:53,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:53,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322850233] [2021-06-05 21:21:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:53,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:53,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322850233] [2021-06-05 21:21:53,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322850233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:53,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343257352] [2021-06-05 21:21:53,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:53,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:21:53,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:53,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:53,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:53,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343257352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:53,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:53,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 21:21:53,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713428613] [2021-06-05 21:21:53,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:21:53,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:53,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:21:53,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:21:53,176 INFO L87 Difference]: Start difference. First operand 132 states and 359 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:53,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:53,282 INFO L93 Difference]: Finished difference Result 208 states and 487 transitions. [2021-06-05 21:21:53,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:21:53,282 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:21:53,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:53,283 INFO L225 Difference]: With dead ends: 208 [2021-06-05 21:21:53,283 INFO L226 Difference]: Without dead ends: 206 [2021-06-05 21:21:53,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:21:53,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-05 21:21:53,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 151. [2021-06-05 21:21:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8) internal successors, (420), 150 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:53,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 420 transitions. [2021-06-05 21:21:53,288 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 420 transitions. Word has length 14 [2021-06-05 21:21:53,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:53,288 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 420 transitions. [2021-06-05 21:21:53,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:53,288 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 420 transitions. [2021-06-05 21:21:53,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:21:53,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:53,289 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:53,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:53,507 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:53,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:53,507 INFO L82 PathProgramCache]: Analyzing trace with hash 591170861, now seen corresponding path program 19 times [2021-06-05 21:21:53,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:53,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409760577] [2021-06-05 21:21:53,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:53,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:53,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409760577] [2021-06-05 21:21:53,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409760577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:53,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142915870] [2021-06-05 21:21:53,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:53,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:53,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:53,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142915870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:53,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:53,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 21:21:53,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637827292] [2021-06-05 21:21:53,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:21:53,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:53,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:21:53,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:21:53,635 INFO L87 Difference]: Start difference. First operand 151 states and 420 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:53,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:53,713 INFO L93 Difference]: Finished difference Result 199 states and 469 transitions. [2021-06-05 21:21:53,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:21:53,713 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:21:53,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:53,714 INFO L225 Difference]: With dead ends: 199 [2021-06-05 21:21:53,714 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 21:21:53,715 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:21:53,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 21:21:53,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 148. [2021-06-05 21:21:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.7687074829931975) internal successors, (407), 147 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 407 transitions. [2021-06-05 21:21:53,719 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 407 transitions. Word has length 14 [2021-06-05 21:21:53,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:53,719 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 407 transitions. [2021-06-05 21:21:53,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:53,719 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 407 transitions. [2021-06-05 21:21:53,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:21:53,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:53,720 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:53,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 21:21:53,942 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:53,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:53,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1137876473, now seen corresponding path program 20 times [2021-06-05 21:21:53,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:53,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303601481] [2021-06-05 21:21:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:53,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:53,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303601481] [2021-06-05 21:21:53,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303601481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:53,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159319470] [2021-06-05 21:21:53,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:54,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:21:54,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:54,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:54,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:54,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159319470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:54,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:54,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:21:54,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510614318] [2021-06-05 21:21:54,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:21:54,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:54,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:21:54,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:21:54,073 INFO L87 Difference]: Start difference. First operand 148 states and 407 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:54,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:54,173 INFO L93 Difference]: Finished difference Result 203 states and 476 transitions. [2021-06-05 21:21:54,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:21:54,173 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:21:54,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:54,174 INFO L225 Difference]: With dead ends: 203 [2021-06-05 21:21:54,174 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 21:21:54,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:21:54,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 21:21:54,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 144. [2021-06-05 21:21:54,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.7482517482517483) internal successors, (393), 143 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:54,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 393 transitions. [2021-06-05 21:21:54,179 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 393 transitions. Word has length 14 [2021-06-05 21:21:54,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:54,179 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 393 transitions. [2021-06-05 21:21:54,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:54,179 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 393 transitions. [2021-06-05 21:21:54,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:21:54,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:54,180 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:54,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 21:21:54,403 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:54,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:54,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1096231021, now seen corresponding path program 21 times [2021-06-05 21:21:54,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:54,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957158123] [2021-06-05 21:21:54,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:54,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:54,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957158123] [2021-06-05 21:21:54,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957158123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:54,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77342782] [2021-06-05 21:21:54,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:54,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:21:54,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:54,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:54,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:54,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77342782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:54,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:54,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:21:54,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945423164] [2021-06-05 21:21:54,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:21:54,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:54,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:21:54,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:21:54,524 INFO L87 Difference]: Start difference. First operand 144 states and 393 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:54,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:54,625 INFO L93 Difference]: Finished difference Result 179 states and 442 transitions. [2021-06-05 21:21:54,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:21:54,631 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:21:54,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:54,632 INFO L225 Difference]: With dead ends: 179 [2021-06-05 21:21:54,632 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 21:21:54,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:21:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 21:21:54,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2021-06-05 21:21:54,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.7357142857142858) internal successors, (383), 140 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:54,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 383 transitions. [2021-06-05 21:21:54,637 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 383 transitions. Word has length 14 [2021-06-05 21:21:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:54,637 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 383 transitions. [2021-06-05 21:21:54,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:54,637 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 383 transitions. [2021-06-05 21:21:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:21:54,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:54,638 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:54,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:54,860 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:54,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:54,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1634086599, now seen corresponding path program 22 times [2021-06-05 21:21:54,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:54,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426500348] [2021-06-05 21:21:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:54,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:54,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426500348] [2021-06-05 21:21:54,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426500348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:54,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454735801] [2021-06-05 21:21:54,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:54,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:21:54,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:54,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:54,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:54,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454735801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:54,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:54,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:21:54,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253166108] [2021-06-05 21:21:54,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:21:54,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:54,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:21:54,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:21:54,998 INFO L87 Difference]: Start difference. First operand 141 states and 383 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:55,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:55,142 INFO L93 Difference]: Finished difference Result 200 states and 499 transitions. [2021-06-05 21:21:55,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:21:55,143 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:21:55,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:55,144 INFO L225 Difference]: With dead ends: 200 [2021-06-05 21:21:55,144 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 21:21:55,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:21:55,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 21:21:55,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 142. [2021-06-05 21:21:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.74468085106383) internal successors, (387), 141 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:55,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 387 transitions. [2021-06-05 21:21:55,148 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 387 transitions. Word has length 14 [2021-06-05 21:21:55,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:55,148 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 387 transitions. [2021-06-05 21:21:55,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:55,148 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 387 transitions. [2021-06-05 21:21:55,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:21:55,148 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:55,148 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:55,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 21:21:55,367 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:55,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:55,367 INFO L82 PathProgramCache]: Analyzing trace with hash 674548242, now seen corresponding path program 23 times [2021-06-05 21:21:55,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:55,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069557588] [2021-06-05 21:21:55,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:55,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:55,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069557588] [2021-06-05 21:21:55,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069557588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:55,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935258786] [2021-06-05 21:21:55,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:55,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:21:55,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:55,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:55,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:21:55,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935258786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:55,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:55,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 21:21:55,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796743399] [2021-06-05 21:21:55,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:21:55,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:55,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:21:55,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:21:55,477 INFO L87 Difference]: Start difference. First operand 142 states and 387 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:55,522 INFO L93 Difference]: Finished difference Result 197 states and 465 transitions. [2021-06-05 21:21:55,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:21:55,522 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 21:21:55,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:55,523 INFO L225 Difference]: With dead ends: 197 [2021-06-05 21:21:55,523 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 21:21:55,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:21:55,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 21:21:55,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 146. [2021-06-05 21:21:55,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.7448275862068967) internal successors, (398), 145 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 21:21:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 398 transitions. [2021-06-05 21:21:55,527 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 398 transitions. Word has length 15 [2021-06-05 21:21:55,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:55,527 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 398 transitions. [2021-06-05 21:21:55,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:55,527 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 398 transitions. [2021-06-05 21:21:55,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:21:55,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:55,528 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:55,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:55,741 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:55,741 INFO L82 PathProgramCache]: Analyzing trace with hash -164351056, now seen corresponding path program 24 times [2021-06-05 21:21:55,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:55,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510916741] [2021-06-05 21:21:55,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:55,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:55,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510916741] [2021-06-05 21:21:55,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510916741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:55,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950173164] [2021-06-05 21:21:55,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:55,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:21:55,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:55,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:55,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:55,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950173164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:55,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:55,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-06-05 21:21:55,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018663804] [2021-06-05 21:21:55,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:21:55,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:55,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:21:55,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:21:55,844 INFO L87 Difference]: Start difference. First operand 146 states and 398 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:55,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:55,922 INFO L93 Difference]: Finished difference Result 194 states and 457 transitions. [2021-06-05 21:21:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:21:55,923 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:21:55,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:55,924 INFO L225 Difference]: With dead ends: 194 [2021-06-05 21:21:55,924 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 21:21:55,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:21:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 21:21:55,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 146. [2021-06-05 21:21:55,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.731034482758621) internal successors, (396), 145 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:55,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 396 transitions. [2021-06-05 21:21:55,927 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 396 transitions. Word has length 15 [2021-06-05 21:21:55,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:55,928 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 396 transitions. [2021-06-05 21:21:55,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:55,928 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 396 transitions. [2021-06-05 21:21:55,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:21:55,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:55,928 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:56,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 21:21:56,149 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:56,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:56,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1325053940, now seen corresponding path program 25 times [2021-06-05 21:21:56,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:56,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721248072] [2021-06-05 21:21:56,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:56,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:56,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721248072] [2021-06-05 21:21:56,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721248072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:56,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597590260] [2021-06-05 21:21:56,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:56,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:56,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:56,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597590260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:56,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:56,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 21:21:56,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224791333] [2021-06-05 21:21:56,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:21:56,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:56,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:21:56,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:21:56,253 INFO L87 Difference]: Start difference. First operand 146 states and 396 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:56,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:56,324 INFO L93 Difference]: Finished difference Result 179 states and 439 transitions. [2021-06-05 21:21:56,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:21:56,325 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:21:56,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:56,325 INFO L225 Difference]: With dead ends: 179 [2021-06-05 21:21:56,326 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 21:21:56,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:21:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 21:21:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 147. [2021-06-05 21:21:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.719178082191781) internal successors, (397), 146 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:56,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 397 transitions. [2021-06-05 21:21:56,330 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 397 transitions. Word has length 15 [2021-06-05 21:21:56,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:56,330 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 397 transitions. [2021-06-05 21:21:56,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 397 transitions. [2021-06-05 21:21:56,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:21:56,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:56,331 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:56,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 21:21:56,545 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:56,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:56,545 INFO L82 PathProgramCache]: Analyzing trace with hash 765538634, now seen corresponding path program 26 times [2021-06-05 21:21:56,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:56,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087237775] [2021-06-05 21:21:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:56,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:56,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087237775] [2021-06-05 21:21:56,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087237775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:56,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027188683] [2021-06-05 21:21:56,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:56,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:21:56,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:56,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:56,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:21:56,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027188683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:56,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:56,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 21:21:56,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868244536] [2021-06-05 21:21:56,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:21:56,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:56,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:21:56,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:21:56,636 INFO L87 Difference]: Start difference. First operand 147 states and 397 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:56,689 INFO L93 Difference]: Finished difference Result 220 states and 505 transitions. [2021-06-05 21:21:56,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:21:56,689 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 21:21:56,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:56,690 INFO L225 Difference]: With dead ends: 220 [2021-06-05 21:21:56,690 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 21:21:56,691 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:21:56,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 21:21:56,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 151. [2021-06-05 21:21:56,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7333333333333334) internal successors, (410), 150 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 410 transitions. [2021-06-05 21:21:56,695 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 410 transitions. Word has length 15 [2021-06-05 21:21:56,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:56,695 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 410 transitions. [2021-06-05 21:21:56,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:56,695 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 410 transitions. [2021-06-05 21:21:56,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:21:56,696 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:56,696 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:56,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 21:21:56,909 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:56,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:56,909 INFO L82 PathProgramCache]: Analyzing trace with hash -73360664, now seen corresponding path program 27 times [2021-06-05 21:21:56,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:56,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661647583] [2021-06-05 21:21:56,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:56,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:56,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661647583] [2021-06-05 21:21:56,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661647583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:56,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302514764] [2021-06-05 21:21:56,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:56,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:21:56,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:56,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:21:56,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:57,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302514764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:57,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:57,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:21:57,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259083102] [2021-06-05 21:21:57,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:21:57,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:57,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:21:57,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:21:57,020 INFO L87 Difference]: Start difference. First operand 151 states and 410 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:57,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:57,092 INFO L93 Difference]: Finished difference Result 207 states and 482 transitions. [2021-06-05 21:21:57,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:21:57,092 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:21:57,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:57,093 INFO L225 Difference]: With dead ends: 207 [2021-06-05 21:21:57,093 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 21:21:57,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:21:57,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 21:21:57,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 151. [2021-06-05 21:21:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.72) internal successors, (408), 150 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 408 transitions. [2021-06-05 21:21:57,097 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 408 transitions. Word has length 15 [2021-06-05 21:21:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:57,097 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 408 transitions. [2021-06-05 21:21:57,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:57,097 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 408 transitions. [2021-06-05 21:21:57,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:21:57,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:57,097 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:57,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:57,319 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:57,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:57,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1416044332, now seen corresponding path program 28 times [2021-06-05 21:21:57,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:57,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767163193] [2021-06-05 21:21:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:57,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:57,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767163193] [2021-06-05 21:21:57,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767163193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:57,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223248264] [2021-06-05 21:21:57,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:57,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:21:57,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:57,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:57,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:57,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223248264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:57,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:57,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 21:21:57,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990342077] [2021-06-05 21:21:57,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:21:57,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:57,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:21:57,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:21:57,427 INFO L87 Difference]: Start difference. First operand 151 states and 408 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:57,516 INFO L93 Difference]: Finished difference Result 212 states and 487 transitions. [2021-06-05 21:21:57,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:21:57,517 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:21:57,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:57,517 INFO L225 Difference]: With dead ends: 212 [2021-06-05 21:21:57,518 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 21:21:57,518 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:21:57,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 21:21:57,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 151. [2021-06-05 21:21:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7133333333333334) internal successors, (407), 150 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:57,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 407 transitions. [2021-06-05 21:21:57,522 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 407 transitions. Word has length 15 [2021-06-05 21:21:57,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:57,522 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 407 transitions. [2021-06-05 21:21:57,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:57,522 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 407 transitions. [2021-06-05 21:21:57,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:21:57,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:57,522 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:57,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 21:21:57,723 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:57,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:57,723 INFO L82 PathProgramCache]: Analyzing trace with hash 342958952, now seen corresponding path program 29 times [2021-06-05 21:21:57,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:57,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463005456] [2021-06-05 21:21:57,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:57,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:57,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463005456] [2021-06-05 21:21:57,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463005456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:57,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913808603] [2021-06-05 21:21:57,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:57,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:21:57,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:57,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:57,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:57,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913808603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:57,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:57,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 21:21:57,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035779131] [2021-06-05 21:21:57,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:21:57,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:57,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:21:57,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:21:57,829 INFO L87 Difference]: Start difference. First operand 151 states and 407 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:57,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:57,887 INFO L93 Difference]: Finished difference Result 182 states and 465 transitions. [2021-06-05 21:21:57,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:21:57,888 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:21:57,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:57,889 INFO L225 Difference]: With dead ends: 182 [2021-06-05 21:21:57,889 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 21:21:57,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:21:57,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 21:21:57,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-06-05 21:21:57,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.7066666666666666) internal successors, (406), 150 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 406 transitions. [2021-06-05 21:21:57,893 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 406 transitions. Word has length 15 [2021-06-05 21:21:57,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:57,893 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 406 transitions. [2021-06-05 21:21:57,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:57,893 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 406 transitions. [2021-06-05 21:21:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:21:57,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:57,894 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:58,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:58,113 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:58,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:58,113 INFO L82 PathProgramCache]: Analyzing trace with hash -708726510, now seen corresponding path program 30 times [2021-06-05 21:21:58,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:58,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393921050] [2021-06-05 21:21:58,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:58,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:58,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393921050] [2021-06-05 21:21:58,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393921050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:58,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374547819] [2021-06-05 21:21:58,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:58,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:21:58,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:58,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:58,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:58,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374547819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:58,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:58,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-06-05 21:21:58,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543169398] [2021-06-05 21:21:58,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:21:58,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:58,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:21:58,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:21:58,235 INFO L87 Difference]: Start difference. First operand 151 states and 406 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:58,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:58,282 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2021-06-05 21:21:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:21:58,282 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 21:21:58,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:58,283 INFO L225 Difference]: With dead ends: 262 [2021-06-05 21:21:58,283 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 21:21:58,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:21:58,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 21:21:58,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 175. [2021-06-05 21:21:58,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.839080459770115) internal successors, (494), 174 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:58,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 494 transitions. [2021-06-05 21:21:58,288 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 494 transitions. Word has length 15 [2021-06-05 21:21:58,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:58,288 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 494 transitions. [2021-06-05 21:21:58,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:58,288 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 494 transitions. [2021-06-05 21:21:58,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:21:58,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:58,289 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:58,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 21:21:58,511 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:58,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:58,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1547625808, now seen corresponding path program 31 times [2021-06-05 21:21:58,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:58,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223146475] [2021-06-05 21:21:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:58,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:58,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223146475] [2021-06-05 21:21:58,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223146475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:58,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918377211] [2021-06-05 21:21:58,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:58,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:58,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:21:58,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918377211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:58,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:58,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2021-06-05 21:21:58,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246802579] [2021-06-05 21:21:58,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:21:58,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:58,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:21:58,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:21:58,645 INFO L87 Difference]: Start difference. First operand 175 states and 494 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:58,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:58,720 INFO L93 Difference]: Finished difference Result 242 states and 591 transitions. [2021-06-05 21:21:58,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:21:58,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 21:21:58,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:58,721 INFO L225 Difference]: With dead ends: 242 [2021-06-05 21:21:58,721 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 21:21:58,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:21:58,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 21:21:58,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 175. [2021-06-05 21:21:58,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8275862068965516) internal successors, (492), 174 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 492 transitions. [2021-06-05 21:21:58,726 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 492 transitions. Word has length 15 [2021-06-05 21:21:58,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:58,726 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 492 transitions. [2021-06-05 21:21:58,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:58,726 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 492 transitions. [2021-06-05 21:21:58,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:21:58,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:58,726 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:58,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 21:21:58,949 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:58,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:58,950 INFO L82 PathProgramCache]: Analyzing trace with hash -58220812, now seen corresponding path program 32 times [2021-06-05 21:21:58,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:58,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288279365] [2021-06-05 21:21:58,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:59,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:59,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288279365] [2021-06-05 21:21:59,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288279365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:59,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881888071] [2021-06-05 21:21:59,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:59,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:21:59,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:59,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:59,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:59,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881888071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:59,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:59,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 21:21:59,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908226058] [2021-06-05 21:21:59,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:21:59,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:59,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:21:59,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:21:59,074 INFO L87 Difference]: Start difference. First operand 175 states and 492 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:59,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:59,159 INFO L93 Difference]: Finished difference Result 247 states and 596 transitions. [2021-06-05 21:21:59,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:21:59,160 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 21:21:59,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:59,161 INFO L225 Difference]: With dead ends: 247 [2021-06-05 21:21:59,161 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 21:21:59,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:21:59,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 21:21:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 179. [2021-06-05 21:21:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.842696629213483) internal successors, (506), 178 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 506 transitions. [2021-06-05 21:21:59,165 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 506 transitions. Word has length 15 [2021-06-05 21:21:59,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:59,166 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 506 transitions. [2021-06-05 21:21:59,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 506 transitions. [2021-06-05 21:21:59,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:21:59,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:59,166 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:59,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 21:21:59,390 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:59,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:59,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1131306192, now seen corresponding path program 33 times [2021-06-05 21:21:59,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:59,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412244084] [2021-06-05 21:21:59,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:59,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:59,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412244084] [2021-06-05 21:21:59,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412244084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:59,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120475016] [2021-06-05 21:21:59,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:59,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:21:59,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:59,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:59,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:59,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120475016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:59,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:59,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 21:21:59,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698863501] [2021-06-05 21:21:59,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:21:59,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:59,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:21:59,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:21:59,514 INFO L87 Difference]: Start difference. First operand 179 states and 506 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:59,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:59,601 INFO L93 Difference]: Finished difference Result 219 states and 577 transitions. [2021-06-05 21:21:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:21:59,601 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 21:21:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:59,602 INFO L225 Difference]: With dead ends: 219 [2021-06-05 21:21:59,602 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 21:21:59,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:21:59,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 21:21:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 179. [2021-06-05 21:21:59,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.837078651685393) internal successors, (505), 178 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:59,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 505 transitions. [2021-06-05 21:21:59,606 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 505 transitions. Word has length 15 [2021-06-05 21:21:59,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:59,606 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 505 transitions. [2021-06-05 21:21:59,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:59,606 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 505 transitions. [2021-06-05 21:21:59,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:21:59,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:59,607 INFO L554 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:59,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 21:21:59,821 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:59,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:59,821 INFO L82 PathProgramCache]: Analyzing trace with hash -37214604, now seen corresponding path program 34 times [2021-06-05 21:21:59,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:59,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601259326] [2021-06-05 21:21:59,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:59,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:59,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601259326] [2021-06-05 21:21:59,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601259326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:59,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112969950] [2021-06-05 21:21:59,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:59,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:21:59,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:59,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:21:59,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:59,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112969950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:59,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:59,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 21:21:59,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640319968] [2021-06-05 21:21:59,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:21:59,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:59,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:21:59,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:21:59,938 INFO L87 Difference]: Start difference. First operand 179 states and 505 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:00,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:00,007 INFO L93 Difference]: Finished difference Result 212 states and 567 transitions. [2021-06-05 21:22:00,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:22:00,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:22:00,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:00,008 INFO L225 Difference]: With dead ends: 212 [2021-06-05 21:22:00,008 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 21:22:00,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:00,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 21:22:00,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 179. [2021-06-05 21:22:00,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.831460674157303) internal successors, (504), 178 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:00,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 504 transitions. [2021-06-05 21:22:00,012 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 504 transitions. Word has length 15 [2021-06-05 21:22:00,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:00,013 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 504 transitions. [2021-06-05 21:22:00,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:00,013 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 504 transitions. [2021-06-05 21:22:00,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:22:00,013 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:00,013 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:00,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 21:22:00,236 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:00,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:00,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1066138199, now seen corresponding path program 35 times [2021-06-05 21:22:00,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:00,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078407209] [2021-06-05 21:22:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:00,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:00,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078407209] [2021-06-05 21:22:00,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078407209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:00,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285359101] [2021-06-05 21:22:00,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:00,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:22:00,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:00,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:22:00,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:00,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285359101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:00,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:00,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 21:22:00,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910817983] [2021-06-05 21:22:00,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:00,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:00,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:00,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:00,411 INFO L87 Difference]: Start difference. First operand 179 states and 504 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:00,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:00,506 INFO L93 Difference]: Finished difference Result 452 states and 1210 transitions. [2021-06-05 21:22:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:22:00,506 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:22:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:00,508 INFO L225 Difference]: With dead ends: 452 [2021-06-05 21:22:00,508 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 21:22:00,508 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:00,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 21:22:00,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 236. [2021-06-05 21:22:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.748936170212766) internal successors, (646), 235 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 646 transitions. [2021-06-05 21:22:00,514 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 646 transitions. Word has length 16 [2021-06-05 21:22:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:00,514 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 646 transitions. [2021-06-05 21:22:00,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:00,514 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 646 transitions. [2021-06-05 21:22:00,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:22:00,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:00,515 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:00,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 21:22:00,729 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:00,729 INFO L82 PathProgramCache]: Analyzing trace with hash -2129828983, now seen corresponding path program 36 times [2021-06-05 21:22:00,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:00,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967097547] [2021-06-05 21:22:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:00,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:00,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967097547] [2021-06-05 21:22:00,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967097547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:00,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719964281] [2021-06-05 21:22:00,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:00,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:22:00,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:00,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:22:00,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:00,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:00,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:22:01,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:22:01,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:01,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:22:01,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:22:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:01,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719964281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:01,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:01,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 21:22:01,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808737771] [2021-06-05 21:22:01,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:22:01,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:01,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:22:01,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:01,279 INFO L87 Difference]: Start difference. First operand 236 states and 646 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:01,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:01,378 INFO L93 Difference]: Finished difference Result 318 states and 823 transitions. [2021-06-05 21:22:01,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:22:01,378 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:22:01,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:01,380 INFO L225 Difference]: With dead ends: 318 [2021-06-05 21:22:01,380 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 21:22:01,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:01,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 21:22:01,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 284. [2021-06-05 21:22:01,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.7420494699646643) internal successors, (776), 283 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:01,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 776 transitions. [2021-06-05 21:22:01,385 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 776 transitions. Word has length 17 [2021-06-05 21:22:01,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:01,385 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 776 transitions. [2021-06-05 21:22:01,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:01,386 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 776 transitions. [2021-06-05 21:22:01,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:22:01,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:01,386 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:01,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-05 21:22:01,606 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:01,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:01,607 INFO L82 PathProgramCache]: Analyzing trace with hash 368526055, now seen corresponding path program 37 times [2021-06-05 21:22:01,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:01,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092803405] [2021-06-05 21:22:01,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:01,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:01,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092803405] [2021-06-05 21:22:01,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092803405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:01,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081234917] [2021-06-05 21:22:01,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:01,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:22:01,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:01,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:01,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:22:02,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:22:02,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:02,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:22:02,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:22:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:02,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081234917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:02,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:02,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 21:22:02,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52804866] [2021-06-05 21:22:02,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:22:02,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:02,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:22:02,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:02,023 INFO L87 Difference]: Start difference. First operand 284 states and 776 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:02,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:02,156 INFO L93 Difference]: Finished difference Result 363 states and 957 transitions. [2021-06-05 21:22:02,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:22:02,156 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:22:02,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:02,157 INFO L225 Difference]: With dead ends: 363 [2021-06-05 21:22:02,157 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 21:22:02,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:02,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 21:22:02,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 326. [2021-06-05 21:22:02,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.766153846153846) internal successors, (899), 325 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:02,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 899 transitions. [2021-06-05 21:22:02,164 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 899 transitions. Word has length 17 [2021-06-05 21:22:02,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:02,164 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 899 transitions. [2021-06-05 21:22:02,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:02,164 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 899 transitions. [2021-06-05 21:22:02,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:22:02,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:02,165 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:02,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:02,381 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:02,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:02,381 INFO L82 PathProgramCache]: Analyzing trace with hash 527358741, now seen corresponding path program 38 times [2021-06-05 21:22:02,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:02,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912500553] [2021-06-05 21:22:02,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:02,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:02,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912500553] [2021-06-05 21:22:02,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912500553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:02,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749380865] [2021-06-05 21:22:02,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:02,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:02,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:02,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:22:02,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:02,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:02,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:22:02,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:22:02,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:02,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:22:02,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:22:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:02,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749380865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:02,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:02,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 21:22:02,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140128687] [2021-06-05 21:22:02,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:22:02,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:02,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:22:02,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:02,938 INFO L87 Difference]: Start difference. First operand 326 states and 899 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:03,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:03,068 INFO L93 Difference]: Finished difference Result 412 states and 1100 transitions. [2021-06-05 21:22:03,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:22:03,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:22:03,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:03,070 INFO L225 Difference]: With dead ends: 412 [2021-06-05 21:22:03,070 INFO L226 Difference]: Without dead ends: 408 [2021-06-05 21:22:03,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:03,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-06-05 21:22:03,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 370. [2021-06-05 21:22:03,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.8048780487804876) internal successors, (1035), 369 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:03,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1035 transitions. [2021-06-05 21:22:03,078 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1035 transitions. Word has length 17 [2021-06-05 21:22:03,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:03,078 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1035 transitions. [2021-06-05 21:22:03,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:03,078 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1035 transitions. [2021-06-05 21:22:03,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:22:03,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:03,079 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:03,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 21:22:03,295 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:03,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:03,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1156204711, now seen corresponding path program 39 times [2021-06-05 21:22:03,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:03,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183890280] [2021-06-05 21:22:03,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:03,334 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:22:03,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:03,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183890280] [2021-06-05 21:22:03,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183890280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:03,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171548686] [2021-06-05 21:22:03,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:03,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:22:03,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:03,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:22:03,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:03,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:03,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:22:03,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:22:03,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:03,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:22:03,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:22:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:03,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171548686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:03,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:03,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 21:22:03,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226762493] [2021-06-05 21:22:03,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:22:03,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:03,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:22:03,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:03,754 INFO L87 Difference]: Start difference. First operand 370 states and 1035 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:03,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:03,880 INFO L93 Difference]: Finished difference Result 474 states and 1277 transitions. [2021-06-05 21:22:03,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:22:03,881 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:22:03,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:03,883 INFO L225 Difference]: With dead ends: 474 [2021-06-05 21:22:03,883 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 21:22:03,884 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:03,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 21:22:03,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 421. [2021-06-05 21:22:03,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.85) internal successors, (1197), 420 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:03,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1197 transitions. [2021-06-05 21:22:03,892 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1197 transitions. Word has length 17 [2021-06-05 21:22:03,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:03,894 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1197 transitions. [2021-06-05 21:22:03,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:03,894 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1197 transitions. [2021-06-05 21:22:03,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:22:03,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:03,895 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:04,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:04,113 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:04,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:04,113 INFO L82 PathProgramCache]: Analyzing trace with hash -824406699, now seen corresponding path program 40 times [2021-06-05 21:22:04,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:04,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339847094] [2021-06-05 21:22:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:04,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:04,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339847094] [2021-06-05 21:22:04,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339847094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:04,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039366026] [2021-06-05 21:22:04,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:04,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:04,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:04,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:22:04,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:04,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:04,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:22:04,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:22:04,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:04,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:22:04,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:22:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:04,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039366026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:04,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:04,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 21:22:04,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46626795] [2021-06-05 21:22:04,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:22:04,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:04,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:22:04,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:04,547 INFO L87 Difference]: Start difference. First operand 421 states and 1197 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:04,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:04,697 INFO L93 Difference]: Finished difference Result 501 states and 1382 transitions. [2021-06-05 21:22:04,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:22:04,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:22:04,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:04,698 INFO L225 Difference]: With dead ends: 501 [2021-06-05 21:22:04,699 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 21:22:04,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:04,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 21:22:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 462. [2021-06-05 21:22:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.8720173535791758) internal successors, (1324), 461 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:04,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1324 transitions. [2021-06-05 21:22:04,707 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1324 transitions. Word has length 17 [2021-06-05 21:22:04,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:04,707 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1324 transitions. [2021-06-05 21:22:04,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:04,708 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1324 transitions. [2021-06-05 21:22:04,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:22:04,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:04,709 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:04,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 21:22:04,925 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:04,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:04,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2093818265, now seen corresponding path program 41 times [2021-06-05 21:22:04,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:04,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830826762] [2021-06-05 21:22:04,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:04,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:04,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830826762] [2021-06-05 21:22:04,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830826762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:04,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35863310] [2021-06-05 21:22:04,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:05,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:22:05,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:05,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:22:05,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:05,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:05,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:22:05,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:22:05,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:05,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:22:05,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:22:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:05,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35863310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:05,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:05,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 21:22:05,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270772542] [2021-06-05 21:22:05,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:22:05,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:05,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:22:05,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:05,432 INFO L87 Difference]: Start difference. First operand 462 states and 1324 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:05,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:05,563 INFO L93 Difference]: Finished difference Result 537 states and 1487 transitions. [2021-06-05 21:22:05,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:22:05,564 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:22:05,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:05,566 INFO L225 Difference]: With dead ends: 537 [2021-06-05 21:22:05,566 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 21:22:05,566 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:05,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 21:22:05,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 497. [2021-06-05 21:22:05,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.8891129032258065) internal successors, (1433), 496 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:05,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1433 transitions. [2021-06-05 21:22:05,576 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1433 transitions. Word has length 17 [2021-06-05 21:22:05,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:05,577 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1433 transitions. [2021-06-05 21:22:05,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:05,577 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1433 transitions. [2021-06-05 21:22:05,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:22:05,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:05,578 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:05,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:05,793 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:05,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:05,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1504096149, now seen corresponding path program 42 times [2021-06-05 21:22:05,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:05,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772536668] [2021-06-05 21:22:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:05,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:05,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772536668] [2021-06-05 21:22:05,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772536668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:05,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009153713] [2021-06-05 21:22:05,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:05,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:22:05,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:05,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:22:05,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:06,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:06,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:22:06,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:22:06,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:06,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:22:06,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:22:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:06,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009153713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:06,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:06,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 21:22:06,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98437891] [2021-06-05 21:22:06,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:22:06,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:06,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:22:06,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:06,227 INFO L87 Difference]: Start difference. First operand 497 states and 1433 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:06,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:06,350 INFO L93 Difference]: Finished difference Result 574 states and 1592 transitions. [2021-06-05 21:22:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:22:06,351 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:22:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:06,353 INFO L225 Difference]: With dead ends: 574 [2021-06-05 21:22:06,353 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 21:22:06,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:06,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 21:22:06,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 529. [2021-06-05 21:22:06,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.9015151515151514) internal successors, (1532), 528 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:06,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1532 transitions. [2021-06-05 21:22:06,363 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1532 transitions. Word has length 17 [2021-06-05 21:22:06,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:06,364 INFO L482 AbstractCegarLoop]: Abstraction has 529 states and 1532 transitions. [2021-06-05 21:22:06,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:06,364 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1532 transitions. [2021-06-05 21:22:06,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:06,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:06,365 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:06,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:06,581 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:06,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:06,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1577117358, now seen corresponding path program 43 times [2021-06-05 21:22:06,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:06,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410484561] [2021-06-05 21:22:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:06,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:06,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410484561] [2021-06-05 21:22:06,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410484561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:06,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264743528] [2021-06-05 21:22:06,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:06,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:06,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:06,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264743528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:06,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:06,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:22:06,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089922767] [2021-06-05 21:22:06,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:06,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:06,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:06,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:06,714 INFO L87 Difference]: Start difference. First operand 529 states and 1532 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:06,904 INFO L93 Difference]: Finished difference Result 696 states and 1799 transitions. [2021-06-05 21:22:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:22:06,905 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:06,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:06,907 INFO L225 Difference]: With dead ends: 696 [2021-06-05 21:22:06,907 INFO L226 Difference]: Without dead ends: 689 [2021-06-05 21:22:06,908 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:22:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-06-05 21:22:06,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 549. [2021-06-05 21:22:06,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.906934306569343) internal successors, (1593), 548 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1593 transitions. [2021-06-05 21:22:06,919 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1593 transitions. Word has length 18 [2021-06-05 21:22:06,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:06,919 INFO L482 AbstractCegarLoop]: Abstraction has 549 states and 1593 transitions. [2021-06-05 21:22:06,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:06,919 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1593 transitions. [2021-06-05 21:22:06,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:06,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:06,920 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:07,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-05 21:22:07,143 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:07,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:07,143 INFO L82 PathProgramCache]: Analyzing trace with hash 121393866, now seen corresponding path program 44 times [2021-06-05 21:22:07,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:07,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036234557] [2021-06-05 21:22:07,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:07,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:07,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036234557] [2021-06-05 21:22:07,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036234557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:07,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720142579] [2021-06-05 21:22:07,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:07,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:07,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:07,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:07,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:07,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720142579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:07,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:07,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:22:07,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348820472] [2021-06-05 21:22:07,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:22:07,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:07,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:22:07,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:22:07,302 INFO L87 Difference]: Start difference. First operand 549 states and 1593 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:07,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:07,353 INFO L93 Difference]: Finished difference Result 706 states and 1828 transitions. [2021-06-05 21:22:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:22:07,353 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:07,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:07,356 INFO L225 Difference]: With dead ends: 706 [2021-06-05 21:22:07,356 INFO L226 Difference]: Without dead ends: 706 [2021-06-05 21:22:07,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:07,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-05 21:22:07,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 525. [2021-06-05 21:22:07,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.8874045801526718) internal successors, (1513), 524 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1513 transitions. [2021-06-05 21:22:07,368 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1513 transitions. Word has length 18 [2021-06-05 21:22:07,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:07,368 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1513 transitions. [2021-06-05 21:22:07,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:07,368 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1513 transitions. [2021-06-05 21:22:07,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:07,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:07,369 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:07,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:07,593 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:07,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:07,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1437522508, now seen corresponding path program 45 times [2021-06-05 21:22:07,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:07,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793494499] [2021-06-05 21:22:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:07,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:07,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793494499] [2021-06-05 21:22:07,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793494499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:07,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291025005] [2021-06-05 21:22:07,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:07,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:22:07,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:07,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:07,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:07,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291025005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:07,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:07,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:22:07,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721201420] [2021-06-05 21:22:07,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:22:07,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:07,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:22:07,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:22:07,714 INFO L87 Difference]: Start difference. First operand 525 states and 1513 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:07,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:07,831 INFO L93 Difference]: Finished difference Result 683 states and 1762 transitions. [2021-06-05 21:22:07,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:07,832 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:07,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:07,834 INFO L225 Difference]: With dead ends: 683 [2021-06-05 21:22:07,834 INFO L226 Difference]: Without dead ends: 681 [2021-06-05 21:22:07,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:22:07,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-06-05 21:22:07,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 547. [2021-06-05 21:22:07,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.8956043956043955) internal successors, (1581), 546 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:07,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1581 transitions. [2021-06-05 21:22:07,846 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1581 transitions. Word has length 18 [2021-06-05 21:22:07,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:07,846 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1581 transitions. [2021-06-05 21:22:07,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:07,846 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1581 transitions. [2021-06-05 21:22:07,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:07,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:07,848 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:08,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 21:22:08,062 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:08,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:08,062 INFO L82 PathProgramCache]: Analyzing trace with hash 280226552, now seen corresponding path program 46 times [2021-06-05 21:22:08,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:08,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734216180] [2021-06-05 21:22:08,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:08,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:08,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734216180] [2021-06-05 21:22:08,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734216180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:08,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619427045] [2021-06-05 21:22:08,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:08,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:08,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:08,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:08,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:08,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619427045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:08,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:08,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:22:08,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433370012] [2021-06-05 21:22:08,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:22:08,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:08,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:22:08,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:22:08,188 INFO L87 Difference]: Start difference. First operand 547 states and 1581 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:08,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:08,247 INFO L93 Difference]: Finished difference Result 721 states and 1842 transitions. [2021-06-05 21:22:08,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:22:08,247 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:08,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:08,250 INFO L225 Difference]: With dead ends: 721 [2021-06-05 21:22:08,250 INFO L226 Difference]: Without dead ends: 721 [2021-06-05 21:22:08,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-05 21:22:08,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 548. [2021-06-05 21:22:08,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.895795246800731) internal successors, (1584), 547 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:08,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1584 transitions. [2021-06-05 21:22:08,264 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1584 transitions. Word has length 18 [2021-06-05 21:22:08,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:08,264 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1584 transitions. [2021-06-05 21:22:08,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:08,264 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1584 transitions. [2021-06-05 21:22:08,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:08,265 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:08,266 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:08,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 21:22:08,485 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:08,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1448820782, now seen corresponding path program 47 times [2021-06-05 21:22:08,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:08,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027741806] [2021-06-05 21:22:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:08,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:08,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027741806] [2021-06-05 21:22:08,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027741806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:08,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972994908] [2021-06-05 21:22:08,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:08,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:22:08,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:08,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:08,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:08,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972994908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:08,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:08,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:22:08,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708720676] [2021-06-05 21:22:08,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:22:08,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:08,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:22:08,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:08,617 INFO L87 Difference]: Start difference. First operand 548 states and 1584 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:08,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:08,684 INFO L93 Difference]: Finished difference Result 777 states and 1974 transitions. [2021-06-05 21:22:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:22:08,689 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:08,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:08,692 INFO L225 Difference]: With dead ends: 777 [2021-06-05 21:22:08,692 INFO L226 Difference]: Without dead ends: 777 [2021-06-05 21:22:08,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:22:08,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-06-05 21:22:08,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 523. [2021-06-05 21:22:08,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.875478927203065) internal successors, (1501), 522 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:08,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1501 transitions. [2021-06-05 21:22:08,703 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1501 transitions. Word has length 18 [2021-06-05 21:22:08,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:08,703 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1501 transitions. [2021-06-05 21:22:08,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:08,703 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1501 transitions. [2021-06-05 21:22:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:08,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:08,705 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:08,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 21:22:08,928 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:08,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:08,928 INFO L82 PathProgramCache]: Analyzing trace with hash -808676538, now seen corresponding path program 48 times [2021-06-05 21:22:08,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:08,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734536577] [2021-06-05 21:22:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:08,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:08,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734536577] [2021-06-05 21:22:08,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734536577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:08,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128385583] [2021-06-05 21:22:08,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:08,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:22:08,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:08,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:08,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:09,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128385583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:09,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:09,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:22:09,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665239518] [2021-06-05 21:22:09,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:22:09,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:09,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:22:09,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:22:09,039 INFO L87 Difference]: Start difference. First operand 523 states and 1501 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:09,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:09,140 INFO L93 Difference]: Finished difference Result 678 states and 1749 transitions. [2021-06-05 21:22:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:09,141 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:09,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:09,146 INFO L225 Difference]: With dead ends: 678 [2021-06-05 21:22:09,146 INFO L226 Difference]: Without dead ends: 676 [2021-06-05 21:22:09,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:22:09,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-05 21:22:09,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 547. [2021-06-05 21:22:09,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.880952380952381) internal successors, (1573), 546 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1573 transitions. [2021-06-05 21:22:09,167 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1573 transitions. Word has length 18 [2021-06-05 21:22:09,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:09,167 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1573 transitions. [2021-06-05 21:22:09,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1573 transitions. [2021-06-05 21:22:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:09,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:09,168 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:09,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 21:22:09,391 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:09,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:09,391 INFO L82 PathProgramCache]: Analyzing trace with hash 909072522, now seen corresponding path program 49 times [2021-06-05 21:22:09,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:09,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988745857] [2021-06-05 21:22:09,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:09,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:09,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988745857] [2021-06-05 21:22:09,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988745857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:09,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784415673] [2021-06-05 21:22:09,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:09,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:09,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:09,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784415673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:09,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:09,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:22:09,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380419667] [2021-06-05 21:22:09,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:22:09,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:09,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:22:09,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:22:09,531 INFO L87 Difference]: Start difference. First operand 547 states and 1573 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:09,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:09,586 INFO L93 Difference]: Finished difference Result 708 states and 1807 transitions. [2021-06-05 21:22:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:22:09,587 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:09,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:09,589 INFO L225 Difference]: With dead ends: 708 [2021-06-05 21:22:09,589 INFO L226 Difference]: Without dead ends: 708 [2021-06-05 21:22:09,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:09,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-06-05 21:22:09,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 547. [2021-06-05 21:22:09,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.880952380952381) internal successors, (1573), 546 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1573 transitions. [2021-06-05 21:22:09,602 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1573 transitions. Word has length 18 [2021-06-05 21:22:09,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:09,602 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1573 transitions. [2021-06-05 21:22:09,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:09,602 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1573 transitions. [2021-06-05 21:22:09,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:09,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:09,603 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:09,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:09,827 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:09,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:09,827 INFO L82 PathProgramCache]: Analyzing trace with hash -819974812, now seen corresponding path program 50 times [2021-06-05 21:22:09,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:09,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409253116] [2021-06-05 21:22:09,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:09,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:09,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409253116] [2021-06-05 21:22:09,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409253116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:09,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355653763] [2021-06-05 21:22:09,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:09,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:09,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:09,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:09,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:09,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355653763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:09,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:09,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:22:09,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063039733] [2021-06-05 21:22:09,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:22:09,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:09,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:22:09,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:09,984 INFO L87 Difference]: Start difference. First operand 547 states and 1573 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:10,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:10,062 INFO L93 Difference]: Finished difference Result 767 states and 1938 transitions. [2021-06-05 21:22:10,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:22:10,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:10,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:10,064 INFO L225 Difference]: With dead ends: 767 [2021-06-05 21:22:10,064 INFO L226 Difference]: Without dead ends: 767 [2021-06-05 21:22:10,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:22:10,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-06-05 21:22:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 520. [2021-06-05 21:22:10,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 2.859344894026975) internal successors, (1484), 519 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1484 transitions. [2021-06-05 21:22:10,074 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1484 transitions. Word has length 18 [2021-06-05 21:22:10,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:10,074 INFO L482 AbstractCegarLoop]: Abstraction has 520 states and 1484 transitions. [2021-06-05 21:22:10,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:10,074 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1484 transitions. [2021-06-05 21:22:10,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:10,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:10,075 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:10,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 21:22:10,293 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:10,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1414132682, now seen corresponding path program 51 times [2021-06-05 21:22:10,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:10,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532505793] [2021-06-05 21:22:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:10,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:10,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532505793] [2021-06-05 21:22:10,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532505793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:10,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292753927] [2021-06-05 21:22:10,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:10,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:22:10,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:10,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:10,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:10,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292753927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:10,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:10,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:22:10,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469429579] [2021-06-05 21:22:10,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:22:10,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:10,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:22:10,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:10,430 INFO L87 Difference]: Start difference. First operand 520 states and 1484 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:10,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:10,528 INFO L93 Difference]: Finished difference Result 976 states and 2581 transitions. [2021-06-05 21:22:10,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:22:10,528 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:10,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:10,531 INFO L225 Difference]: With dead ends: 976 [2021-06-05 21:22:10,531 INFO L226 Difference]: Without dead ends: 976 [2021-06-05 21:22:10,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:22:10,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-06-05 21:22:10,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 701. [2021-06-05 21:22:10,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.9371428571428573) internal successors, (2056), 700 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:10,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2056 transitions. [2021-06-05 21:22:10,543 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2056 transitions. Word has length 18 [2021-06-05 21:22:10,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:10,543 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 2056 transitions. [2021-06-05 21:22:10,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:10,544 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2056 transitions. [2021-06-05 21:22:10,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:10,545 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:10,545 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:10,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:10,761 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:10,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:10,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1505679348, now seen corresponding path program 52 times [2021-06-05 21:22:10,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:10,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626061337] [2021-06-05 21:22:10,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:10,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:10,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626061337] [2021-06-05 21:22:10,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626061337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:10,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057225427] [2021-06-05 21:22:10,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:10,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:10,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:10,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:10,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:10,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057225427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:10,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:10,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:22:10,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303262183] [2021-06-05 21:22:10,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:22:10,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:10,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:22:10,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:22:10,883 INFO L87 Difference]: Start difference. First operand 701 states and 2056 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:10,981 INFO L93 Difference]: Finished difference Result 888 states and 2419 transitions. [2021-06-05 21:22:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:10,981 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:10,985 INFO L225 Difference]: With dead ends: 888 [2021-06-05 21:22:10,985 INFO L226 Difference]: Without dead ends: 886 [2021-06-05 21:22:10,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:22:10,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-06-05 21:22:10,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 764. [2021-06-05 21:22:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.9436435124508518) internal successors, (2246), 763 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:10,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2246 transitions. [2021-06-05 21:22:10,998 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2246 transitions. Word has length 18 [2021-06-05 21:22:10,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:10,999 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2246 transitions. [2021-06-05 21:22:10,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:10,999 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2246 transitions. [2021-06-05 21:22:11,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:11,000 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:11,000 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:11,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2021-06-05 21:22:11,223 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:11,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:11,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1071538888, now seen corresponding path program 53 times [2021-06-05 21:22:11,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:11,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085304745] [2021-06-05 21:22:11,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:11,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:11,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085304745] [2021-06-05 21:22:11,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085304745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:11,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777487714] [2021-06-05 21:22:11,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:11,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:22:11,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:11,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:11,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:11,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777487714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:11,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:11,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:22:11,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712092263] [2021-06-05 21:22:11,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:22:11,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:11,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:22:11,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:22:11,346 INFO L87 Difference]: Start difference. First operand 764 states and 2246 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:11,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:11,395 INFO L93 Difference]: Finished difference Result 882 states and 2384 transitions. [2021-06-05 21:22:11,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:22:11,395 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:11,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:11,403 INFO L225 Difference]: With dead ends: 882 [2021-06-05 21:22:11,403 INFO L226 Difference]: Without dead ends: 882 [2021-06-05 21:22:11,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:11,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-06-05 21:22:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 755. [2021-06-05 21:22:11,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.9323607427055705) internal successors, (2211), 754 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:11,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2211 transitions. [2021-06-05 21:22:11,415 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2211 transitions. Word has length 18 [2021-06-05 21:22:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:11,416 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2211 transitions. [2021-06-05 21:22:11,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:11,416 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2211 transitions. [2021-06-05 21:22:11,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:11,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:11,417 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:11,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-05 21:22:11,637 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:11,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:11,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1494381074, now seen corresponding path program 54 times [2021-06-05 21:22:11,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:11,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676863815] [2021-06-05 21:22:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:11,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:11,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676863815] [2021-06-05 21:22:11,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676863815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:11,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192854082] [2021-06-05 21:22:11,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:11,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:22:11,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:11,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:11,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:11,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192854082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:11,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:11,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:22:11,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665011041] [2021-06-05 21:22:11,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:22:11,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:11,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:22:11,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:11,775 INFO L87 Difference]: Start difference. First operand 755 states and 2211 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:11,855 INFO L93 Difference]: Finished difference Result 936 states and 2510 transitions. [2021-06-05 21:22:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:22:11,855 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:11,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:11,866 INFO L225 Difference]: With dead ends: 936 [2021-06-05 21:22:11,866 INFO L226 Difference]: Without dead ends: 936 [2021-06-05 21:22:11,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:22:11,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-06-05 21:22:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 710. [2021-06-05 21:22:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 2.913963328631876) internal successors, (2066), 709 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:11,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2066 transitions. [2021-06-05 21:22:11,879 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2066 transitions. Word has length 18 [2021-06-05 21:22:11,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:11,879 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2066 transitions. [2021-06-05 21:22:11,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2066 transitions. [2021-06-05 21:22:11,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:11,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:11,880 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:12,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:12,103 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:12,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:12,103 INFO L82 PathProgramCache]: Analyzing trace with hash -566478728, now seen corresponding path program 55 times [2021-06-05 21:22:12,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:12,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619849457] [2021-06-05 21:22:12,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:12,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:12,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619849457] [2021-06-05 21:22:12,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619849457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:12,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033334259] [2021-06-05 21:22:12,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:12,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:12,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:12,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033334259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:12,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:12,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:22:12,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37487222] [2021-06-05 21:22:12,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:22:12,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:12,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:22:12,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:12,225 INFO L87 Difference]: Start difference. First operand 710 states and 2066 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:12,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:12,302 INFO L93 Difference]: Finished difference Result 1110 states and 3081 transitions. [2021-06-05 21:22:12,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:22:12,302 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:12,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:12,305 INFO L225 Difference]: With dead ends: 1110 [2021-06-05 21:22:12,305 INFO L226 Difference]: Without dead ends: 1110 [2021-06-05 21:22:12,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:22:12,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-06-05 21:22:12,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 950. [2021-06-05 21:22:12,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 2.9736564805057957) internal successors, (2822), 949 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:12,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 2822 transitions. [2021-06-05 21:22:12,320 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 2822 transitions. Word has length 18 [2021-06-05 21:22:12,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:12,321 INFO L482 AbstractCegarLoop]: Abstraction has 950 states and 2822 transitions. [2021-06-05 21:22:12,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:12,321 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 2822 transitions. [2021-06-05 21:22:12,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:12,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:12,322 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:12,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 21:22:12,537 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:12,537 INFO L82 PathProgramCache]: Analyzing trace with hash -28623150, now seen corresponding path program 56 times [2021-06-05 21:22:12,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:12,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836490553] [2021-06-05 21:22:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:12,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:12,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836490553] [2021-06-05 21:22:12,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836490553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:12,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106189140] [2021-06-05 21:22:12,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:12,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:12,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:12,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:12,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:12,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106189140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:12,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:12,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:22:12,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162176409] [2021-06-05 21:22:12,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:22:12,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:12,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:22:12,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:12,645 INFO L87 Difference]: Start difference. First operand 950 states and 2822 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:12,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:12,773 INFO L93 Difference]: Finished difference Result 1384 states and 3920 transitions. [2021-06-05 21:22:12,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:22:12,774 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:12,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:12,776 INFO L225 Difference]: With dead ends: 1384 [2021-06-05 21:22:12,776 INFO L226 Difference]: Without dead ends: 1384 [2021-06-05 21:22:12,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:12,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-06-05 21:22:12,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1190. [2021-06-05 21:22:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.015138772077376) internal successors, (3585), 1189 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3585 transitions. [2021-06-05 21:22:12,795 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3585 transitions. Word has length 18 [2021-06-05 21:22:12,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:12,796 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 3585 transitions. [2021-06-05 21:22:12,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3585 transitions. [2021-06-05 21:22:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:12,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:12,797 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:13,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:13,020 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:13,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:13,020 INFO L82 PathProgramCache]: Analyzing trace with hash -928129974, now seen corresponding path program 57 times [2021-06-05 21:22:13,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:13,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114402306] [2021-06-05 21:22:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:13,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:13,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114402306] [2021-06-05 21:22:13,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114402306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:13,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082826579] [2021-06-05 21:22:13,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:13,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:22:13,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:13,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:13,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:22:13,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082826579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:13,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:13,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:22:13,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014005945] [2021-06-05 21:22:13,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:22:13,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:13,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:22:13,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:22:13,142 INFO L87 Difference]: Start difference. First operand 1190 states and 3585 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:13,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:13,264 INFO L93 Difference]: Finished difference Result 1540 states and 4536 transitions. [2021-06-05 21:22:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:22:13,264 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:13,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:13,267 INFO L225 Difference]: With dead ends: 1540 [2021-06-05 21:22:13,267 INFO L226 Difference]: Without dead ends: 1536 [2021-06-05 21:22:13,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:22:13,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-06-05 21:22:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1457. [2021-06-05 21:22:13,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 3.0494505494505493) internal successors, (4440), 1456 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:13,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 4440 transitions. [2021-06-05 21:22:13,294 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 4440 transitions. Word has length 18 [2021-06-05 21:22:13,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:13,294 INFO L482 AbstractCegarLoop]: Abstraction has 1457 states and 4440 transitions. [2021-06-05 21:22:13,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:13,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 4440 transitions. [2021-06-05 21:22:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:13,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:13,296 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:13,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 21:22:13,509 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:13,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:13,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1482288330, now seen corresponding path program 58 times [2021-06-05 21:22:13,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:13,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165074988] [2021-06-05 21:22:13,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:13,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:13,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165074988] [2021-06-05 21:22:13,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165074988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:13,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564831791] [2021-06-05 21:22:13,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:13,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:13,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:13,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:13,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:13,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564831791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:13,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:13,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:22:13,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900719747] [2021-06-05 21:22:13,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:22:13,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:13,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:22:13,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:22:13,618 INFO L87 Difference]: Start difference. First operand 1457 states and 4440 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:13,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:13,715 INFO L93 Difference]: Finished difference Result 1886 states and 5530 transitions. [2021-06-05 21:22:13,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:22:13,716 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:13,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:13,718 INFO L225 Difference]: With dead ends: 1886 [2021-06-05 21:22:13,718 INFO L226 Difference]: Without dead ends: 1886 [2021-06-05 21:22:13,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:13,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2021-06-05 21:22:13,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1647. [2021-06-05 21:22:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.0674362089914946) internal successors, (5049), 1646 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:13,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5049 transitions. [2021-06-05 21:22:13,743 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5049 transitions. Word has length 18 [2021-06-05 21:22:13,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:13,743 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5049 transitions. [2021-06-05 21:22:13,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:13,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5049 transitions. [2021-06-05 21:22:13,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:13,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:13,745 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:13,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:13,961 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:13,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:13,961 INFO L82 PathProgramCache]: Analyzing trace with hash 975942064, now seen corresponding path program 59 times [2021-06-05 21:22:13,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:13,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166704340] [2021-06-05 21:22:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:14,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:14,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166704340] [2021-06-05 21:22:14,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166704340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:14,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302823979] [2021-06-05 21:22:14,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:14,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:22:14,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:14,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:14,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:14,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302823979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:14,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:14,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:22:14,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806366308] [2021-06-05 21:22:14,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:22:14,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:14,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:22:14,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:14,085 INFO L87 Difference]: Start difference. First operand 1647 states and 5049 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:14,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:14,185 INFO L93 Difference]: Finished difference Result 2131 states and 6281 transitions. [2021-06-05 21:22:14,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:22:14,186 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:14,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:14,189 INFO L225 Difference]: With dead ends: 2131 [2021-06-05 21:22:14,189 INFO L226 Difference]: Without dead ends: 2131 [2021-06-05 21:22:14,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:22:14,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-06-05 21:22:14,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1134. [2021-06-05 21:22:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.0123565754633717) internal successors, (3413), 1133 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3413 transitions. [2021-06-05 21:22:14,210 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3413 transitions. Word has length 18 [2021-06-05 21:22:14,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:14,210 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 3413 transitions. [2021-06-05 21:22:14,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:14,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3413 transitions. [2021-06-05 21:22:14,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:14,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:14,212 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:14,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 21:22:14,433 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:14,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:14,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1513797642, now seen corresponding path program 60 times [2021-06-05 21:22:14,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:14,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463913281] [2021-06-05 21:22:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:14,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:14,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463913281] [2021-06-05 21:22:14,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463913281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:14,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162194470] [2021-06-05 21:22:14,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:14,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:22:14,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:14,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:14,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:14,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162194470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:14,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:14,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:22:14,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656040266] [2021-06-05 21:22:14,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:22:14,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:14,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:22:14,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:14,554 INFO L87 Difference]: Start difference. First operand 1134 states and 3413 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:14,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:14,696 INFO L93 Difference]: Finished difference Result 1469 states and 4201 transitions. [2021-06-05 21:22:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:22:14,696 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:14,699 INFO L225 Difference]: With dead ends: 1469 [2021-06-05 21:22:14,699 INFO L226 Difference]: Without dead ends: 1469 [2021-06-05 21:22:14,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-06-05 21:22:14,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1145. [2021-06-05 21:22:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 3.015734265734266) internal successors, (3450), 1144 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:14,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 3450 transitions. [2021-06-05 21:22:14,718 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 3450 transitions. Word has length 18 [2021-06-05 21:22:14,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:14,719 INFO L482 AbstractCegarLoop]: Abstraction has 1145 states and 3450 transitions. [2021-06-05 21:22:14,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:14,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 3450 transitions. [2021-06-05 21:22:14,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:14,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:14,720 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:14,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:14,943 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:14,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:14,944 INFO L82 PathProgramCache]: Analyzing trace with hash 236267782, now seen corresponding path program 61 times [2021-06-05 21:22:14,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:14,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902702929] [2021-06-05 21:22:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:14,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:14,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902702929] [2021-06-05 21:22:14,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902702929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:14,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023089706] [2021-06-05 21:22:14,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:15,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:15,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:15,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023089706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:15,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:15,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:22:15,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646276950] [2021-06-05 21:22:15,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:22:15,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:15,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:22:15,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:22:15,062 INFO L87 Difference]: Start difference. First operand 1145 states and 3450 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:15,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:15,158 INFO L93 Difference]: Finished difference Result 1280 states and 3655 transitions. [2021-06-05 21:22:15,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:15,159 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:15,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:15,160 INFO L225 Difference]: With dead ends: 1280 [2021-06-05 21:22:15,161 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 21:22:15,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:22:15,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 21:22:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1116. [2021-06-05 21:22:15,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 3.0053811659192826) internal successors, (3351), 1115 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:15,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3351 transitions. [2021-06-05 21:22:15,173 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3351 transitions. Word has length 18 [2021-06-05 21:22:15,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:15,174 INFO L482 AbstractCegarLoop]: Abstraction has 1116 states and 3351 transitions. [2021-06-05 21:22:15,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:15,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3351 transitions. [2021-06-05 21:22:15,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:15,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:15,175 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:15,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 21:22:15,398 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:15,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:15,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1954016842, now seen corresponding path program 62 times [2021-06-05 21:22:15,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:15,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411550172] [2021-06-05 21:22:15,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:15,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:15,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:15,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411550172] [2021-06-05 21:22:15,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411550172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:15,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649510039] [2021-06-05 21:22:15,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:15,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:15,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:15,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:15,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:15,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649510039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:15,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:15,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:22:15,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820195673] [2021-06-05 21:22:15,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:22:15,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:15,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:22:15,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:22:15,517 INFO L87 Difference]: Start difference. First operand 1116 states and 3351 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:15,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:15,575 INFO L93 Difference]: Finished difference Result 1248 states and 3538 transitions. [2021-06-05 21:22:15,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:22:15,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:15,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:15,577 INFO L225 Difference]: With dead ends: 1248 [2021-06-05 21:22:15,578 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 21:22:15,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:15,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 21:22:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1114. [2021-06-05 21:22:15,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.0017969451931714) internal successors, (3341), 1113 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3341 transitions. [2021-06-05 21:22:15,601 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3341 transitions. Word has length 18 [2021-06-05 21:22:15,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:15,601 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 3341 transitions. [2021-06-05 21:22:15,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:15,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3341 transitions. [2021-06-05 21:22:15,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:15,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:15,602 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:15,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:15,825 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:15,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:15,825 INFO L82 PathProgramCache]: Analyzing trace with hash 224969508, now seen corresponding path program 63 times [2021-06-05 21:22:15,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:15,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592222022] [2021-06-05 21:22:15,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:15,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:15,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592222022] [2021-06-05 21:22:15,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592222022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:15,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571619379] [2021-06-05 21:22:15,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:15,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:22:15,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:15,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:15,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:15,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571619379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:15,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:15,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:22:15,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008720035] [2021-06-05 21:22:15,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:22:15,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:15,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:22:15,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:15,949 INFO L87 Difference]: Start difference. First operand 1114 states and 3341 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:16,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:16,012 INFO L93 Difference]: Finished difference Result 1212 states and 3446 transitions. [2021-06-05 21:22:16,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:22:16,013 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:16,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:16,015 INFO L225 Difference]: With dead ends: 1212 [2021-06-05 21:22:16,015 INFO L226 Difference]: Without dead ends: 1212 [2021-06-05 21:22:16,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:16,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-06-05 21:22:16,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1096. [2021-06-05 21:22:16,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 2.992694063926941) internal successors, (3277), 1095 states have internal predecessors, (3277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3277 transitions. [2021-06-05 21:22:16,029 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3277 transitions. Word has length 18 [2021-06-05 21:22:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:16,029 INFO L482 AbstractCegarLoop]: Abstraction has 1096 states and 3277 transitions. [2021-06-05 21:22:16,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:16,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3277 transitions. [2021-06-05 21:22:16,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:16,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:16,031 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:16,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:16,231 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:16,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:16,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1835890294, now seen corresponding path program 64 times [2021-06-05 21:22:16,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:16,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101892998] [2021-06-05 21:22:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:16,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:16,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101892998] [2021-06-05 21:22:16,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101892998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:16,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562483652] [2021-06-05 21:22:16,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:16,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:16,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:16,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:16,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:16,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562483652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:16,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:16,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:22:16,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151926871] [2021-06-05 21:22:16,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:16,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:16,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:16,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:16,345 INFO L87 Difference]: Start difference. First operand 1096 states and 3277 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:16,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:16,426 INFO L93 Difference]: Finished difference Result 1269 states and 3581 transitions. [2021-06-05 21:22:16,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:22:16,426 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:16,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:16,428 INFO L225 Difference]: With dead ends: 1269 [2021-06-05 21:22:16,428 INFO L226 Difference]: Without dead ends: 1269 [2021-06-05 21:22:16,428 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:22:16,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-06-05 21:22:16,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1069. [2021-06-05 21:22:16,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 2.985955056179775) internal successors, (3189), 1068 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:16,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3189 transitions. [2021-06-05 21:22:16,439 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3189 transitions. Word has length 18 [2021-06-05 21:22:16,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:16,439 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 3189 transitions. [2021-06-05 21:22:16,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:16,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3189 transitions. [2021-06-05 21:22:16,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:16,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:16,440 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:16,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-06-05 21:22:16,641 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:16,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:16,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1298034716, now seen corresponding path program 65 times [2021-06-05 21:22:16,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:16,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405643854] [2021-06-05 21:22:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:16,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:16,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405643854] [2021-06-05 21:22:16,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405643854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:16,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651557526] [2021-06-05 21:22:16,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:16,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:22:16,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:16,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:16,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:16,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651557526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:16,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:16,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:22:16,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284125300] [2021-06-05 21:22:16,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:16,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:16,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:16,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:16,764 INFO L87 Difference]: Start difference. First operand 1069 states and 3189 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:16,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:16,856 INFO L93 Difference]: Finished difference Result 1385 states and 3940 transitions. [2021-06-05 21:22:16,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:22:16,856 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:16,858 INFO L225 Difference]: With dead ends: 1385 [2021-06-05 21:22:16,858 INFO L226 Difference]: Without dead ends: 1385 [2021-06-05 21:22:16,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:22:16,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-06-05 21:22:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1117. [2021-06-05 21:22:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.9946236559139785) internal successors, (3342), 1116 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:16,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 3342 transitions. [2021-06-05 21:22:16,875 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 3342 transitions. Word has length 18 [2021-06-05 21:22:16,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:16,875 INFO L482 AbstractCegarLoop]: Abstraction has 1117 states and 3342 transitions. [2021-06-05 21:22:16,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:16,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 3342 transitions. [2021-06-05 21:22:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:16,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:16,877 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:17,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 21:22:17,098 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:17,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:17,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1804380982, now seen corresponding path program 66 times [2021-06-05 21:22:17,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:17,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019927800] [2021-06-05 21:22:17,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:17,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:17,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019927800] [2021-06-05 21:22:17,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019927800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:17,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055603190] [2021-06-05 21:22:17,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:17,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:22:17,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:17,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:17,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:17,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055603190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:17,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:17,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:22:17,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524756352] [2021-06-05 21:22:17,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:17,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:17,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:17,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:17,214 INFO L87 Difference]: Start difference. First operand 1117 states and 3342 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:17,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:17,409 INFO L93 Difference]: Finished difference Result 1491 states and 4244 transitions. [2021-06-05 21:22:17,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:22:17,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:17,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:17,411 INFO L225 Difference]: With dead ends: 1491 [2021-06-05 21:22:17,412 INFO L226 Difference]: Without dead ends: 1491 [2021-06-05 21:22:17,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:22:17,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-06-05 21:22:17,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1299. [2021-06-05 21:22:17,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.010785824345146) internal successors, (3908), 1298 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:17,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3908 transitions. [2021-06-05 21:22:17,431 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3908 transitions. Word has length 18 [2021-06-05 21:22:17,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:17,432 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 3908 transitions. [2021-06-05 21:22:17,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:17,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3908 transitions. [2021-06-05 21:22:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:17,433 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:17,433 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:17,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:17,649 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:17,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:17,649 INFO L82 PathProgramCache]: Analyzing trace with hash -357725678, now seen corresponding path program 67 times [2021-06-05 21:22:17,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:17,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594656088] [2021-06-05 21:22:17,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:17,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:17,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594656088] [2021-06-05 21:22:17,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594656088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:17,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950880243] [2021-06-05 21:22:17,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:17,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:17,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:17,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950880243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:17,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:17,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:22:17,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109122170] [2021-06-05 21:22:17,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:22:17,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:17,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:22:17,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:22:17,757 INFO L87 Difference]: Start difference. First operand 1299 states and 3908 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:17,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:17,873 INFO L93 Difference]: Finished difference Result 1466 states and 4238 transitions. [2021-06-05 21:22:17,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:22:17,873 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:17,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:17,875 INFO L225 Difference]: With dead ends: 1466 [2021-06-05 21:22:17,875 INFO L226 Difference]: Without dead ends: 1462 [2021-06-05 21:22:17,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:22:17,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-06-05 21:22:17,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1236. [2021-06-05 21:22:17,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.0) internal successors, (3705), 1235 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:17,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3705 transitions. [2021-06-05 21:22:17,891 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3705 transitions. Word has length 18 [2021-06-05 21:22:17,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:17,891 INFO L482 AbstractCegarLoop]: Abstraction has 1236 states and 3705 transitions. [2021-06-05 21:22:17,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:17,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3705 transitions. [2021-06-05 21:22:17,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:17,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:17,893 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:18,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 21:22:18,114 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:18,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:18,115 INFO L82 PathProgramCache]: Analyzing trace with hash 2084201938, now seen corresponding path program 68 times [2021-06-05 21:22:18,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:18,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235055030] [2021-06-05 21:22:18,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:18,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:18,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235055030] [2021-06-05 21:22:18,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235055030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:18,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401942284] [2021-06-05 21:22:18,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:18,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:18,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:18,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:18,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:18,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401942284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:18,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:18,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:22:18,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883673830] [2021-06-05 21:22:18,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:22:18,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:18,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:22:18,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:18,253 INFO L87 Difference]: Start difference. First operand 1236 states and 3705 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:18,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:18,390 INFO L93 Difference]: Finished difference Result 1717 states and 4942 transitions. [2021-06-05 21:22:18,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:22:18,390 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:18,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:18,393 INFO L225 Difference]: With dead ends: 1717 [2021-06-05 21:22:18,394 INFO L226 Difference]: Without dead ends: 1717 [2021-06-05 21:22:18,394 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:18,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-06-05 21:22:18,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1445. [2021-06-05 21:22:18,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 3.020083102493075) internal successors, (4361), 1444 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:18,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 4361 transitions. [2021-06-05 21:22:18,417 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 4361 transitions. Word has length 18 [2021-06-05 21:22:18,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:18,417 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 4361 transitions. [2021-06-05 21:22:18,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:18,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 4361 transitions. [2021-06-05 21:22:18,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:18,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:18,419 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:18,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 21:22:18,643 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:18,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:18,643 INFO L82 PathProgramCache]: Analyzing trace with hash -727630420, now seen corresponding path program 69 times [2021-06-05 21:22:18,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:18,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979336501] [2021-06-05 21:22:18,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:18,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:18,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979336501] [2021-06-05 21:22:18,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979336501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:18,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695049838] [2021-06-05 21:22:18,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:18,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:22:18,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:18,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:18,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:18,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695049838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:18,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:18,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:22:18,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319145042] [2021-06-05 21:22:18,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:18,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:18,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:18,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:18,776 INFO L87 Difference]: Start difference. First operand 1445 states and 4361 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:18,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:18,892 INFO L93 Difference]: Finished difference Result 1815 states and 5279 transitions. [2021-06-05 21:22:18,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:22:18,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:18,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:18,895 INFO L225 Difference]: With dead ends: 1815 [2021-06-05 21:22:18,895 INFO L226 Difference]: Without dead ends: 1815 [2021-06-05 21:22:18,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:18,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-06-05 21:22:18,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1189. [2021-06-05 21:22:18,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.9974747474747474) internal successors, (3561), 1188 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:18,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3561 transitions. [2021-06-05 21:22:18,914 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3561 transitions. Word has length 18 [2021-06-05 21:22:18,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:18,915 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3561 transitions. [2021-06-05 21:22:18,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:18,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3561 transitions. [2021-06-05 21:22:18,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:18,916 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:18,916 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:19,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 21:22:19,133 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:19,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1233976686, now seen corresponding path program 70 times [2021-06-05 21:22:19,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:19,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136704320] [2021-06-05 21:22:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:19,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:19,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136704320] [2021-06-05 21:22:19,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136704320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:19,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537753006] [2021-06-05 21:22:19,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:19,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:19,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:19,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:19,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:19,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537753006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:19,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:19,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:22:19,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052658389] [2021-06-05 21:22:19,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:19,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:19,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:19,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:19,253 INFO L87 Difference]: Start difference. First operand 1189 states and 3561 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:19,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:19,451 INFO L93 Difference]: Finished difference Result 1539 states and 4366 transitions. [2021-06-05 21:22:19,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:22:19,452 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:19,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:19,454 INFO L225 Difference]: With dead ends: 1539 [2021-06-05 21:22:19,454 INFO L226 Difference]: Without dead ends: 1539 [2021-06-05 21:22:19,455 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:22:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-06-05 21:22:19,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1195. [2021-06-05 21:22:19,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 2.9983249581239533) internal successors, (3580), 1194 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:19,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 3580 transitions. [2021-06-05 21:22:19,472 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 3580 transitions. Word has length 18 [2021-06-05 21:22:19,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:19,472 INFO L482 AbstractCegarLoop]: Abstraction has 1195 states and 3580 transitions. [2021-06-05 21:22:19,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:19,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 3580 transitions. [2021-06-05 21:22:19,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:19,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:19,474 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:19,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-05 21:22:19,689 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:19,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:19,689 INFO L82 PathProgramCache]: Analyzing trace with hash -460785100, now seen corresponding path program 71 times [2021-06-05 21:22:19,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:19,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539682185] [2021-06-05 21:22:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:19,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:19,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539682185] [2021-06-05 21:22:19,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539682185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:19,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425453992] [2021-06-05 21:22:19,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:19,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:22:19,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:19,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:19,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:19,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425453992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:19,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:19,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:22:19,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190792247] [2021-06-05 21:22:19,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:22:19,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:19,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:22:19,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:22:19,793 INFO L87 Difference]: Start difference. First operand 1195 states and 3580 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:19,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:19,900 INFO L93 Difference]: Finished difference Result 1319 states and 3767 transitions. [2021-06-05 21:22:19,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:19,900 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:19,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:19,902 INFO L225 Difference]: With dead ends: 1319 [2021-06-05 21:22:19,902 INFO L226 Difference]: Without dead ends: 1315 [2021-06-05 21:22:19,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:22:19,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-06-05 21:22:19,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1219. [2021-06-05 21:22:19,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.0) internal successors, (3654), 1218 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:19,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 3654 transitions. [2021-06-05 21:22:19,914 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 3654 transitions. Word has length 18 [2021-06-05 21:22:19,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:19,914 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 3654 transitions. [2021-06-05 21:22:19,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:19,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 3654 transitions. [2021-06-05 21:22:19,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:19,916 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:19,916 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:20,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 21:22:20,133 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:20,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1256963960, now seen corresponding path program 72 times [2021-06-05 21:22:20,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:20,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950373549] [2021-06-05 21:22:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:20,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:20,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950373549] [2021-06-05 21:22:20,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950373549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:20,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455224405] [2021-06-05 21:22:20,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:20,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:22:20,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:20,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:20,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:20,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455224405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:20,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:20,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:22:20,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273006654] [2021-06-05 21:22:20,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:22:20,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:20,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:22:20,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:22:20,255 INFO L87 Difference]: Start difference. First operand 1219 states and 3654 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:20,311 INFO L93 Difference]: Finished difference Result 1350 states and 3852 transitions. [2021-06-05 21:22:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:22:20,311 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:20,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:20,313 INFO L225 Difference]: With dead ends: 1350 [2021-06-05 21:22:20,313 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 21:22:20,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 21:22:20,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1220. [2021-06-05 21:22:20,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1219 states have (on average 3.0) internal successors, (3657), 1219 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:20,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 3657 transitions. [2021-06-05 21:22:20,330 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 3657 transitions. Word has length 18 [2021-06-05 21:22:20,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:20,330 INFO L482 AbstractCegarLoop]: Abstraction has 1220 states and 3657 transitions. [2021-06-05 21:22:20,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:20,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 3657 transitions. [2021-06-05 21:22:20,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:20,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:20,332 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:20,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:20,554 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:20,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:20,555 INFO L82 PathProgramCache]: Analyzing trace with hash -472083374, now seen corresponding path program 73 times [2021-06-05 21:22:20,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:20,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884421303] [2021-06-05 21:22:20,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:20,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:20,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884421303] [2021-06-05 21:22:20,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884421303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:20,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518835722] [2021-06-05 21:22:20,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:20,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:20,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:20,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518835722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:20,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:20,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:22:20,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814629933] [2021-06-05 21:22:20,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:22:20,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:20,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:22:20,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:20,673 INFO L87 Difference]: Start difference. First operand 1220 states and 3657 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:20,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:20,749 INFO L93 Difference]: Finished difference Result 1356 states and 3865 transitions. [2021-06-05 21:22:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:22:20,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:20,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:20,751 INFO L225 Difference]: With dead ends: 1356 [2021-06-05 21:22:20,751 INFO L226 Difference]: Without dead ends: 1356 [2021-06-05 21:22:20,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:22:20,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-05 21:22:20,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1215. [2021-06-05 21:22:20,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.9975288303130148) internal successors, (3639), 1214 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:20,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3639 transitions. [2021-06-05 21:22:20,762 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3639 transitions. Word has length 18 [2021-06-05 21:22:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:20,763 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 3639 transitions. [2021-06-05 21:22:20,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:20,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3639 transitions. [2021-06-05 21:22:20,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:20,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:20,764 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:20,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:20,964 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:20,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:20,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1762024120, now seen corresponding path program 74 times [2021-06-05 21:22:20,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:20,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048694021] [2021-06-05 21:22:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:21,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:21,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048694021] [2021-06-05 21:22:21,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048694021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:21,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269644925] [2021-06-05 21:22:21,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:21,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:21,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:21,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:21,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:21,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269644925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:21,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:21,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:22:21,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600817352] [2021-06-05 21:22:21,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:22:21,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:21,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:22:21,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:21,080 INFO L87 Difference]: Start difference. First operand 1215 states and 3639 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:21,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:21,134 INFO L93 Difference]: Finished difference Result 1623 states and 4723 transitions. [2021-06-05 21:22:21,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:22:21,135 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:21,136 INFO L225 Difference]: With dead ends: 1623 [2021-06-05 21:22:21,136 INFO L226 Difference]: Without dead ends: 1623 [2021-06-05 21:22:21,136 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:22:21,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-06-05 21:22:21,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1529. [2021-06-05 21:22:21,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.017670157068063) internal successors, (4611), 1528 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:21,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4611 transitions. [2021-06-05 21:22:21,151 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4611 transitions. Word has length 18 [2021-06-05 21:22:21,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:21,151 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 4611 transitions. [2021-06-05 21:22:21,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:21,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4611 transitions. [2021-06-05 21:22:21,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:21,152 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:21,152 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:21,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:21,353 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:21,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:21,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1995087598, now seen corresponding path program 75 times [2021-06-05 21:22:21,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:21,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917909413] [2021-06-05 21:22:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:21,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:21,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917909413] [2021-06-05 21:22:21,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917909413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:21,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145664154] [2021-06-05 21:22:21,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:21,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:22:21,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:21,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:21,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:21,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145664154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:21,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:21,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:22:21,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001641907] [2021-06-05 21:22:21,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:21,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:21,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:21,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:21,478 INFO L87 Difference]: Start difference. First operand 1529 states and 4611 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:21,580 INFO L93 Difference]: Finished difference Result 1693 states and 4893 transitions. [2021-06-05 21:22:21,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:22:21,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:21,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:21,582 INFO L225 Difference]: With dead ends: 1693 [2021-06-05 21:22:21,582 INFO L226 Difference]: Without dead ends: 1693 [2021-06-05 21:22:21,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:22:21,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-06-05 21:22:21,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1537. [2021-06-05 21:22:21,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.017578125) internal successors, (4635), 1536 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 4635 transitions. [2021-06-05 21:22:21,596 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 4635 transitions. Word has length 18 [2021-06-05 21:22:21,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:21,596 INFO L482 AbstractCegarLoop]: Abstraction has 1537 states and 4635 transitions. [2021-06-05 21:22:21,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:21,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 4635 transitions. [2021-06-05 21:22:21,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:21,598 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:21,598 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:21,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:21,801 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:21,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1793533432, now seen corresponding path program 76 times [2021-06-05 21:22:21,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:21,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952513706] [2021-06-05 21:22:21,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:21,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:21,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952513706] [2021-06-05 21:22:21,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952513706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:21,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652315177] [2021-06-05 21:22:21,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:21,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:21,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:21,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:21,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:21,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652315177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:21,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:21,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:22:21,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563540180] [2021-06-05 21:22:21,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:21,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:21,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:21,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:21,945 INFO L87 Difference]: Start difference. First operand 1537 states and 4635 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:22,080 INFO L93 Difference]: Finished difference Result 1777 states and 5185 transitions. [2021-06-05 21:22:22,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:22:22,081 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:22,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:22,082 INFO L225 Difference]: With dead ends: 1777 [2021-06-05 21:22:22,082 INFO L226 Difference]: Without dead ends: 1777 [2021-06-05 21:22:22,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:22:22,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-05 21:22:22,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1651. [2021-06-05 21:22:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.0187878787878786) internal successors, (4981), 1650 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 4981 transitions. [2021-06-05 21:22:22,099 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 4981 transitions. Word has length 18 [2021-06-05 21:22:22,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:22,099 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 4981 transitions. [2021-06-05 21:22:22,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:22,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 4981 transitions. [2021-06-05 21:22:22,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:22,100 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:22,100 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:22,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 21:22:22,301 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:22,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:22,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1018298926, now seen corresponding path program 77 times [2021-06-05 21:22:22,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:22,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389480465] [2021-06-05 21:22:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:22,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:22,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389480465] [2021-06-05 21:22:22,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389480465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:22,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735345555] [2021-06-05 21:22:22,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:22,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:22:22,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:22,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:22,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:22,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735345555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:22,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:22,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:22:22,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127160879] [2021-06-05 21:22:22,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:22,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:22,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:22,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:22,437 INFO L87 Difference]: Start difference. First operand 1651 states and 4981 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:22,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:22,654 INFO L93 Difference]: Finished difference Result 1973 states and 5717 transitions. [2021-06-05 21:22:22,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:22:22,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:22,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:22,656 INFO L225 Difference]: With dead ends: 1973 [2021-06-05 21:22:22,656 INFO L226 Difference]: Without dead ends: 1973 [2021-06-05 21:22:22,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:22:22,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-06-05 21:22:22,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1718. [2021-06-05 21:22:22,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.018054746651136) internal successors, (5182), 1717 states have internal predecessors, (5182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:22,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5182 transitions. [2021-06-05 21:22:22,672 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5182 transitions. Word has length 18 [2021-06-05 21:22:22,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:22,672 INFO L482 AbstractCegarLoop]: Abstraction has 1718 states and 5182 transitions. [2021-06-05 21:22:22,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:22,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5182 transitions. [2021-06-05 21:22:22,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:22,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:22,674 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:22,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 21:22:22,875 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:22,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:22,875 INFO L82 PathProgramCache]: Analyzing trace with hash 144938314, now seen corresponding path program 78 times [2021-06-05 21:22:22,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:22,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067491649] [2021-06-05 21:22:22,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:22,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:22,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067491649] [2021-06-05 21:22:22,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067491649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:22,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675199514] [2021-06-05 21:22:22,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:22,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:22:22,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:22,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:22,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:23,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675199514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:23,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:23,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-06-05 21:22:23,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145094082] [2021-06-05 21:22:23,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:23,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:23,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:23,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:23,011 INFO L87 Difference]: Start difference. First operand 1718 states and 5182 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:23,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:23,199 INFO L93 Difference]: Finished difference Result 1834 states and 5328 transitions. [2021-06-05 21:22:23,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:22:23,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:23,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:23,201 INFO L225 Difference]: With dead ends: 1834 [2021-06-05 21:22:23,201 INFO L226 Difference]: Without dead ends: 1830 [2021-06-05 21:22:23,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:22:23,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2021-06-05 21:22:23,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1663. [2021-06-05 21:22:23,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.0138387484957883) internal successors, (5009), 1662 states have internal predecessors, (5009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5009 transitions. [2021-06-05 21:22:23,218 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5009 transitions. Word has length 18 [2021-06-05 21:22:23,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:23,218 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 5009 transitions. [2021-06-05 21:22:23,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:23,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5009 transitions. [2021-06-05 21:22:23,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:23,220 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:23,220 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:23,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:23,420 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:23,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:23,421 INFO L82 PathProgramCache]: Analyzing trace with hash -731312694, now seen corresponding path program 79 times [2021-06-05 21:22:23,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:23,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855466303] [2021-06-05 21:22:23,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:23,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:23,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855466303] [2021-06-05 21:22:23,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855466303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:23,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931182785] [2021-06-05 21:22:23,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:23,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:23,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:23,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931182785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:23,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:23,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 21:22:23,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709578110] [2021-06-05 21:22:23,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:22:23,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:23,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:22:23,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:23,581 INFO L87 Difference]: Start difference. First operand 1663 states and 5009 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:23,854 INFO L93 Difference]: Finished difference Result 2513 states and 7307 transitions. [2021-06-05 21:22:23,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:22:23,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:23,857 INFO L225 Difference]: With dead ends: 2513 [2021-06-05 21:22:23,857 INFO L226 Difference]: Without dead ends: 2513 [2021-06-05 21:22:23,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 230.8ms TimeCoverageRelationStatistics Valid=375, Invalid=747, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:22:23,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-06-05 21:22:23,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1818. [2021-06-05 21:22:23,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.0181618051733627) internal successors, (5484), 1817 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5484 transitions. [2021-06-05 21:22:23,885 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5484 transitions. Word has length 18 [2021-06-05 21:22:23,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:23,885 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 5484 transitions. [2021-06-05 21:22:23,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:23,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5484 transitions. [2021-06-05 21:22:23,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:23,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:23,888 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:24,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 21:22:24,101 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:24,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:24,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1998769872, now seen corresponding path program 80 times [2021-06-05 21:22:24,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:24,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780625765] [2021-06-05 21:22:24,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:24,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:24,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780625765] [2021-06-05 21:22:24,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780625765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:24,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540882927] [2021-06-05 21:22:24,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:24,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:24,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:24,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:24,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:24,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540882927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:24,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:24,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 21:22:24,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858947941] [2021-06-05 21:22:24,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:22:24,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:24,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:22:24,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:24,251 INFO L87 Difference]: Start difference. First operand 1818 states and 5484 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:24,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:24,475 INFO L93 Difference]: Finished difference Result 2122 states and 6163 transitions. [2021-06-05 21:22:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:22:24,475 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:24,477 INFO L225 Difference]: With dead ends: 2122 [2021-06-05 21:22:24,477 INFO L226 Difference]: Without dead ends: 2122 [2021-06-05 21:22:24,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=331, Invalid=661, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:22:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-06-05 21:22:24,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1809. [2021-06-05 21:22:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.019358407079646) internal successors, (5459), 1808 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 5459 transitions. [2021-06-05 21:22:24,496 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 5459 transitions. Word has length 18 [2021-06-05 21:22:24,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:24,496 INFO L482 AbstractCegarLoop]: Abstraction has 1809 states and 5459 transitions. [2021-06-05 21:22:24,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:24,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 5459 transitions. [2021-06-05 21:22:24,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:24,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:24,498 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:24,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:24,699 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:24,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:24,699 INFO L82 PathProgramCache]: Analyzing trace with hash -515634934, now seen corresponding path program 81 times [2021-06-05 21:22:24,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:24,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438380692] [2021-06-05 21:22:24,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:24,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:24,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438380692] [2021-06-05 21:22:24,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438380692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:24,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683623820] [2021-06-05 21:22:24,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:24,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:22:24,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:24,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:24,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:24,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683623820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:24,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:24,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 21:22:24,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156513485] [2021-06-05 21:22:24,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:22:24,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:24,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:22:24,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:24,867 INFO L87 Difference]: Start difference. First operand 1809 states and 5459 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:25,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:25,111 INFO L93 Difference]: Finished difference Result 2135 states and 6194 transitions. [2021-06-05 21:22:25,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:22:25,112 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:25,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:25,113 INFO L225 Difference]: With dead ends: 2135 [2021-06-05 21:22:25,113 INFO L226 Difference]: Without dead ends: 2135 [2021-06-05 21:22:25,114 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:22:25,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-06-05 21:22:25,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1814. [2021-06-05 21:22:25,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.0193050193050195) internal successors, (5474), 1813 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5474 transitions. [2021-06-05 21:22:25,133 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5474 transitions. Word has length 18 [2021-06-05 21:22:25,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:25,133 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5474 transitions. [2021-06-05 21:22:25,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:25,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5474 transitions. [2021-06-05 21:22:25,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:25,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:25,136 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:25,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 21:22:25,336 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:25,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:25,337 INFO L82 PathProgramCache]: Analyzing trace with hash -594587962, now seen corresponding path program 82 times [2021-06-05 21:22:25,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:25,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829011784] [2021-06-05 21:22:25,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:25,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:25,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829011784] [2021-06-05 21:22:25,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829011784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:25,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381948809] [2021-06-05 21:22:25,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:25,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:25,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:25,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:25,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:25,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381948809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:25,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:25,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-06-05 21:22:25,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24981518] [2021-06-05 21:22:25,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:25,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:25,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:25,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:25,451 INFO L87 Difference]: Start difference. First operand 1814 states and 5474 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:25,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:25,575 INFO L93 Difference]: Finished difference Result 2025 states and 5942 transitions. [2021-06-05 21:22:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:22:25,576 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:25,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:25,577 INFO L225 Difference]: With dead ends: 2025 [2021-06-05 21:22:25,578 INFO L226 Difference]: Without dead ends: 2023 [2021-06-05 21:22:25,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:22:25,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-06-05 21:22:25,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1929. [2021-06-05 21:22:25,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1928 states have (on average 3.0264522821576763) internal successors, (5835), 1928 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 5835 transitions. [2021-06-05 21:22:25,597 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 5835 transitions. Word has length 18 [2021-06-05 21:22:25,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:25,597 INFO L482 AbstractCegarLoop]: Abstraction has 1929 states and 5835 transitions. [2021-06-05 21:22:25,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:25,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 5835 transitions. [2021-06-05 21:22:25,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:25,599 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:25,599 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:25,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-05 21:22:25,800 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:25,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:25,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1123161098, now seen corresponding path program 83 times [2021-06-05 21:22:25,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:25,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973194571] [2021-06-05 21:22:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:25,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:25,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973194571] [2021-06-05 21:22:25,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973194571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:25,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312602205] [2021-06-05 21:22:25,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:25,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:22:25,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:25,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:25,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:25,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312602205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:25,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:25,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-06-05 21:22:25,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180016849] [2021-06-05 21:22:25,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:25,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:25,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:25,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:25,949 INFO L87 Difference]: Start difference. First operand 1929 states and 5835 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:26,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:26,054 INFO L93 Difference]: Finished difference Result 2077 states and 6079 transitions. [2021-06-05 21:22:26,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:26,054 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:26,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:26,056 INFO L225 Difference]: With dead ends: 2077 [2021-06-05 21:22:26,056 INFO L226 Difference]: Without dead ends: 2077 [2021-06-05 21:22:26,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:22:26,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-06-05 21:22:26,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1931. [2021-06-05 21:22:26,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 3.0264248704663212) internal successors, (5841), 1930 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:26,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5841 transitions. [2021-06-05 21:22:26,075 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5841 transitions. Word has length 18 [2021-06-05 21:22:26,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:26,075 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5841 transitions. [2021-06-05 21:22:26,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:26,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5841 transitions. [2021-06-05 21:22:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:26,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:26,077 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:26,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-05 21:22:26,278 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:26,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:26,278 INFO L82 PathProgramCache]: Analyzing trace with hash -605886236, now seen corresponding path program 84 times [2021-06-05 21:22:26,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:26,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386768185] [2021-06-05 21:22:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:26,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:26,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386768185] [2021-06-05 21:22:26,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386768185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:26,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044959564] [2021-06-05 21:22:26,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:26,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:22:26,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:26,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:26,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:26,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044959564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:26,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:26,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-06-05 21:22:26,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498834925] [2021-06-05 21:22:26,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:22:26,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:26,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:22:26,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:26,445 INFO L87 Difference]: Start difference. First operand 1931 states and 5841 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:26,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:26,591 INFO L93 Difference]: Finished difference Result 2122 states and 6197 transitions. [2021-06-05 21:22:26,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:22:26,591 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:26,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:26,593 INFO L225 Difference]: With dead ends: 2122 [2021-06-05 21:22:26,593 INFO L226 Difference]: Without dead ends: 2122 [2021-06-05 21:22:26,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:22:26,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-06-05 21:22:26,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1939. [2021-06-05 21:22:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.026315789473684) internal successors, (5865), 1938 states have internal predecessors, (5865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:26,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5865 transitions. [2021-06-05 21:22:26,612 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5865 transitions. Word has length 18 [2021-06-05 21:22:26,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:26,612 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 5865 transitions. [2021-06-05 21:22:26,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:26,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5865 transitions. [2021-06-05 21:22:26,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:26,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:26,614 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:26,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:26,814 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:26,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:26,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1628221258, now seen corresponding path program 85 times [2021-06-05 21:22:26,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:26,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250448314] [2021-06-05 21:22:26,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:26,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:26,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250448314] [2021-06-05 21:22:26,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250448314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:26,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650310027] [2021-06-05 21:22:26,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:26,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:26,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:26,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650310027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:26,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:26,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-06-05 21:22:26,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467955566] [2021-06-05 21:22:26,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:22:26,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:26,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:22:26,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:26,960 INFO L87 Difference]: Start difference. First operand 1939 states and 5865 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:27,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:27,106 INFO L93 Difference]: Finished difference Result 2505 states and 7377 transitions. [2021-06-05 21:22:27,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:27,106 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:27,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:27,108 INFO L225 Difference]: With dead ends: 2505 [2021-06-05 21:22:27,108 INFO L226 Difference]: Without dead ends: 2505 [2021-06-05 21:22:27,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 143.7ms TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:22:27,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-06-05 21:22:27,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2323. [2021-06-05 21:22:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2322 states have (on average 3.0353143841515933) internal successors, (7048), 2322 states have internal predecessors, (7048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 7048 transitions. [2021-06-05 21:22:27,132 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 7048 transitions. Word has length 18 [2021-06-05 21:22:27,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:27,132 INFO L482 AbstractCegarLoop]: Abstraction has 2323 states and 7048 transitions. [2021-06-05 21:22:27,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:27,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 7048 transitions. [2021-06-05 21:22:27,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:27,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:27,135 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:27,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:27,335 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:27,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:27,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2128890460, now seen corresponding path program 86 times [2021-06-05 21:22:27,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:27,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633030194] [2021-06-05 21:22:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:27,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:27,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633030194] [2021-06-05 21:22:27,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633030194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:27,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267827990] [2021-06-05 21:22:27,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:27,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:27,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:27,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:27,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:27,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267827990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:27,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:27,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-06-05 21:22:27,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229383077] [2021-06-05 21:22:27,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:22:27,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:27,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:22:27,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:27,465 INFO L87 Difference]: Start difference. First operand 2323 states and 7048 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:27,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:27,607 INFO L93 Difference]: Finished difference Result 2489 states and 7427 transitions. [2021-06-05 21:22:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:22:27,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:27,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:27,610 INFO L225 Difference]: With dead ends: 2489 [2021-06-05 21:22:27,610 INFO L226 Difference]: Without dead ends: 2489 [2021-06-05 21:22:27,610 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:22:27,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2021-06-05 21:22:27,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 2409. [2021-06-05 21:22:27,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 3.034468438538206) internal successors, (7307), 2408 states have internal predecessors, (7307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 7307 transitions. [2021-06-05 21:22:27,636 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 7307 transitions. Word has length 18 [2021-06-05 21:22:27,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:27,636 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 7307 transitions. [2021-06-05 21:22:27,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:27,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 7307 transitions. [2021-06-05 21:22:27,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:27,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:27,638 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:27,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:27,841 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:27,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:27,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1659730570, now seen corresponding path program 87 times [2021-06-05 21:22:27,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:27,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469998842] [2021-06-05 21:22:27,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:27,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:27,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469998842] [2021-06-05 21:22:27,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469998842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:27,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931574954] [2021-06-05 21:22:27,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:27,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:22:27,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:27,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:27,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:27,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931574954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:27,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:27,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 21:22:27,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264425166] [2021-06-05 21:22:27,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:22:27,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:27,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:22:27,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:22:27,990 INFO L87 Difference]: Start difference. First operand 2409 states and 7307 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:28,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:28,207 INFO L93 Difference]: Finished difference Result 2555 states and 7581 transitions. [2021-06-05 21:22:28,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:22:28,208 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:28,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:28,210 INFO L225 Difference]: With dead ends: 2555 [2021-06-05 21:22:28,210 INFO L226 Difference]: Without dead ends: 2555 [2021-06-05 21:22:28,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 207.1ms TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:22:28,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-06-05 21:22:28,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2408. [2021-06-05 21:22:28,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 3.0344827586206895) internal successors, (7304), 2407 states have internal predecessors, (7304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:28,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 7304 transitions. [2021-06-05 21:22:28,234 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 7304 transitions. Word has length 18 [2021-06-05 21:22:28,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:28,234 INFO L482 AbstractCegarLoop]: Abstraction has 2408 states and 7304 transitions. [2021-06-05 21:22:28,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:28,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 7304 transitions. [2021-06-05 21:22:28,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:28,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:28,236 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:28,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:28,437 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:28,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:28,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1152101788, now seen corresponding path program 88 times [2021-06-05 21:22:28,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:28,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851421204] [2021-06-05 21:22:28,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:28,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:28,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851421204] [2021-06-05 21:22:28,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851421204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:28,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515884862] [2021-06-05 21:22:28,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:28,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:28,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:28,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:28,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:28,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515884862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:28,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:28,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 21:22:28,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143669357] [2021-06-05 21:22:28,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:22:28,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:28,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:22:28,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:22:28,583 INFO L87 Difference]: Start difference. First operand 2408 states and 7304 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:28,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:28,754 INFO L93 Difference]: Finished difference Result 2601 states and 7724 transitions. [2021-06-05 21:22:28,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:22:28,754 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:28,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:28,756 INFO L225 Difference]: With dead ends: 2601 [2021-06-05 21:22:28,756 INFO L226 Difference]: Without dead ends: 2601 [2021-06-05 21:22:28,756 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:22:28,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-05 21:22:28,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2436. [2021-06-05 21:22:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2435 states have (on average 3.0340862422997947) internal successors, (7388), 2435 states have internal predecessors, (7388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:28,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 7388 transitions. [2021-06-05 21:22:28,779 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 7388 transitions. Word has length 18 [2021-06-05 21:22:28,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:28,779 INFO L482 AbstractCegarLoop]: Abstraction has 2436 states and 7388 transitions. [2021-06-05 21:22:28,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 7388 transitions. [2021-06-05 21:22:28,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:22:28,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:28,781 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:28,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:28,982 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:28,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:28,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1875408330, now seen corresponding path program 89 times [2021-06-05 21:22:28,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:28,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258934704] [2021-06-05 21:22:28,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:29,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:29,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258934704] [2021-06-05 21:22:29,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258934704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:29,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588126341] [2021-06-05 21:22:29,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:29,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:22:29,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:29,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:29,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:29,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588126341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:29,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:29,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 21:22:29,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473472459] [2021-06-05 21:22:29,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:22:29,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:29,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:22:29,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:22:29,133 INFO L87 Difference]: Start difference. First operand 2436 states and 7388 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:29,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:29,394 INFO L93 Difference]: Finished difference Result 2926 states and 8621 transitions. [2021-06-05 21:22:29,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:22:29,394 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:22:29,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:29,396 INFO L225 Difference]: With dead ends: 2926 [2021-06-05 21:22:29,396 INFO L226 Difference]: Without dead ends: 2926 [2021-06-05 21:22:29,397 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 246.3ms TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:22:29,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-06-05 21:22:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2460. [2021-06-05 21:22:29,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2459 states have (on average 3.0337535583570556) internal successors, (7460), 2459 states have internal predecessors, (7460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:29,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 7460 transitions. [2021-06-05 21:22:29,420 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 7460 transitions. Word has length 18 [2021-06-05 21:22:29,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:29,420 INFO L482 AbstractCegarLoop]: Abstraction has 2460 states and 7460 transitions. [2021-06-05 21:22:29,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 7460 transitions. [2021-06-05 21:22:29,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:29,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:29,422 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:29,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 21:22:29,623 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:29,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:29,623 INFO L82 PathProgramCache]: Analyzing trace with hash -892568151, now seen corresponding path program 90 times [2021-06-05 21:22:29,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:29,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682686367] [2021-06-05 21:22:29,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:29,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:29,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682686367] [2021-06-05 21:22:29,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682686367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:29,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221680515] [2021-06-05 21:22:29,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:29,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:22:29,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:29,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:29,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:29,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221680515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:29,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:29,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-06-05 21:22:29,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423090182] [2021-06-05 21:22:29,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:22:29,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:29,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:22:29,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:22:29,789 INFO L87 Difference]: Start difference. First operand 2460 states and 7460 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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 21:22:29,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:29,946 INFO L93 Difference]: Finished difference Result 2653 states and 7746 transitions. [2021-06-05 21:22:29,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:22:29,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:29,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:29,949 INFO L225 Difference]: With dead ends: 2653 [2021-06-05 21:22:29,949 INFO L226 Difference]: Without dead ends: 2647 [2021-06-05 21:22:29,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:22:29,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2021-06-05 21:22:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 2452. [2021-06-05 21:22:29,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 3.025703794369645) internal successors, (7416), 2451 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 7416 transitions. [2021-06-05 21:22:29,972 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 7416 transitions. Word has length 20 [2021-06-05 21:22:29,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:29,972 INFO L482 AbstractCegarLoop]: Abstraction has 2452 states and 7416 transitions. [2021-06-05 21:22:29,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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 21:22:29,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 7416 transitions. [2021-06-05 21:22:29,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:29,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:29,975 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:30,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 21:22:30,176 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:30,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:30,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1250996055, now seen corresponding path program 91 times [2021-06-05 21:22:30,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:30,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644368799] [2021-06-05 21:22:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:30,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:30,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644368799] [2021-06-05 21:22:30,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644368799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:30,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316851775] [2021-06-05 21:22:30,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:30,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:30,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:30,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316851775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:30,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:30,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-06-05 21:22:30,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29865507] [2021-06-05 21:22:30,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:30,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:30,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:30,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:30,309 INFO L87 Difference]: Start difference. First operand 2452 states and 7416 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:30,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:30,438 INFO L93 Difference]: Finished difference Result 2499 states and 7508 transitions. [2021-06-05 21:22:30,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:30,439 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:30,441 INFO L225 Difference]: With dead ends: 2499 [2021-06-05 21:22:30,442 INFO L226 Difference]: Without dead ends: 2498 [2021-06-05 21:22:30,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:22:30,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-06-05 21:22:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2452. [2021-06-05 21:22:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 3.0244798041615666) internal successors, (7413), 2451 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:30,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 7413 transitions. [2021-06-05 21:22:30,471 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 7413 transitions. Word has length 20 [2021-06-05 21:22:30,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:30,471 INFO L482 AbstractCegarLoop]: Abstraction has 2452 states and 7413 transitions. [2021-06-05 21:22:30,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:30,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 7413 transitions. [2021-06-05 21:22:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:30,476 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:30,476 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:30,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:30,697 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:30,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:30,698 INFO L82 PathProgramCache]: Analyzing trace with hash 412854133, now seen corresponding path program 92 times [2021-06-05 21:22:30,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:30,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381957178] [2021-06-05 21:22:30,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:22:30,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:30,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381957178] [2021-06-05 21:22:30,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381957178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:30,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496655114] [2021-06-05 21:22:30,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:30,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:30,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:30,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:30,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:22:30,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496655114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:30,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:30,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 21:22:30,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193318993] [2021-06-05 21:22:30,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:22:30,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:30,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:22:30,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:30,844 INFO L87 Difference]: Start difference. First operand 2452 states and 7413 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:30,929 INFO L93 Difference]: Finished difference Result 2670 states and 7781 transitions. [2021-06-05 21:22:30,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:22:30,929 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:30,932 INFO L225 Difference]: With dead ends: 2670 [2021-06-05 21:22:30,932 INFO L226 Difference]: Without dead ends: 2670 [2021-06-05 21:22:30,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:30,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2021-06-05 21:22:30,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2472. [2021-06-05 21:22:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 3.0145690004046943) internal successors, (7449), 2471 states have internal predecessors, (7449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:30,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7449 transitions. [2021-06-05 21:22:30,955 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7449 transitions. Word has length 20 [2021-06-05 21:22:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:30,955 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7449 transitions. [2021-06-05 21:22:30,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7449 transitions. [2021-06-05 21:22:30,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:30,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:30,957 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:31,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-06-05 21:22:31,158 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:31,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:31,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1063359831, now seen corresponding path program 93 times [2021-06-05 21:22:31,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:31,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751680712] [2021-06-05 21:22:31,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:31,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:31,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751680712] [2021-06-05 21:22:31,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751680712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:31,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350351531] [2021-06-05 21:22:31,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:31,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:22:31,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:31,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:22:31,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:31,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350351531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:31,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:31,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:22:31,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743441446] [2021-06-05 21:22:31,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:31,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:31,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:31,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:31,273 INFO L87 Difference]: Start difference. First operand 2472 states and 7449 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:31,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:31,427 INFO L93 Difference]: Finished difference Result 2616 states and 7646 transitions. [2021-06-05 21:22:31,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:22:31,428 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:31,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:31,431 INFO L225 Difference]: With dead ends: 2616 [2021-06-05 21:22:31,431 INFO L226 Difference]: Without dead ends: 2608 [2021-06-05 21:22:31,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:31,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-06-05 21:22:31,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2441. [2021-06-05 21:22:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.018032786885246) internal successors, (7364), 2440 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 7364 transitions. [2021-06-05 21:22:31,469 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 7364 transitions. Word has length 20 [2021-06-05 21:22:31,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:31,470 INFO L482 AbstractCegarLoop]: Abstraction has 2441 states and 7364 transitions. [2021-06-05 21:22:31,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:31,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 7364 transitions. [2021-06-05 21:22:31,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:31,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:31,472 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:31,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:31,687 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:31,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:31,688 INFO L82 PathProgramCache]: Analyzing trace with hash -9725549, now seen corresponding path program 94 times [2021-06-05 21:22:31,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:31,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140523005] [2021-06-05 21:22:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:31,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:31,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140523005] [2021-06-05 21:22:31,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140523005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:31,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304593062] [2021-06-05 21:22:31,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:31,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:31,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:31,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:31,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:31,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304593062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:31,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:31,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 21:22:31,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390749948] [2021-06-05 21:22:31,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:22:31,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:31,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:22:31,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:31,819 INFO L87 Difference]: Start difference. First operand 2441 states and 7364 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:31,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:31,979 INFO L93 Difference]: Finished difference Result 2536 states and 7516 transitions. [2021-06-05 21:22:31,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:22:31,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:31,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:31,981 INFO L225 Difference]: With dead ends: 2536 [2021-06-05 21:22:31,981 INFO L226 Difference]: Without dead ends: 2531 [2021-06-05 21:22:31,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:22:31,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-06-05 21:22:31,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2441. [2021-06-05 21:22:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.015573770491803) internal successors, (7358), 2440 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:32,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 7358 transitions. [2021-06-05 21:22:32,003 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 7358 transitions. Word has length 20 [2021-06-05 21:22:32,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:32,003 INFO L482 AbstractCegarLoop]: Abstraction has 2441 states and 7358 transitions. [2021-06-05 21:22:32,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:32,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 7358 transitions. [2021-06-05 21:22:32,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:32,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:32,005 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:32,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-05 21:22:32,205 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:32,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:32,205 INFO L82 PathProgramCache]: Analyzing trace with hash -856557433, now seen corresponding path program 95 times [2021-06-05 21:22:32,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:32,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541671232] [2021-06-05 21:22:32,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:22:32,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:32,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541671232] [2021-06-05 21:22:32,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541671232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:32,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613020552] [2021-06-05 21:22:32,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:32,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:22:32,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:32,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:32,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:22:32,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613020552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:32,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:32,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 21:22:32,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473382864] [2021-06-05 21:22:32,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:22:32,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:32,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:22:32,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:32,344 INFO L87 Difference]: Start difference. First operand 2441 states and 7358 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:32,419 INFO L93 Difference]: Finished difference Result 2646 states and 7683 transitions. [2021-06-05 21:22:32,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:22:32,420 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:32,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:32,422 INFO L225 Difference]: With dead ends: 2646 [2021-06-05 21:22:32,422 INFO L226 Difference]: Without dead ends: 2644 [2021-06-05 21:22:32,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:22:32,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-06-05 21:22:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2425. [2021-06-05 21:22:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 3.007838283828383) internal successors, (7291), 2424 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7291 transitions. [2021-06-05 21:22:32,444 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7291 transitions. Word has length 20 [2021-06-05 21:22:32,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:32,445 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 7291 transitions. [2021-06-05 21:22:32,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:32,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7291 transitions. [2021-06-05 21:22:32,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:32,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:32,446 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:32,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:32,647 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:32,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:32,647 INFO L82 PathProgramCache]: Analyzing trace with hash -206051735, now seen corresponding path program 96 times [2021-06-05 21:22:32,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:32,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742151521] [2021-06-05 21:22:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:32,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:32,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742151521] [2021-06-05 21:22:32,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742151521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:32,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960235530] [2021-06-05 21:22:32,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:32,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:22:32,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:32,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:32,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:32,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960235530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:32,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:32,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-06-05 21:22:32,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856344169] [2021-06-05 21:22:32,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:32,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:32,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:32,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:32,779 INFO L87 Difference]: Start difference. First operand 2425 states and 7291 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:32,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:32,895 INFO L93 Difference]: Finished difference Result 2573 states and 7502 transitions. [2021-06-05 21:22:32,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:22:32,895 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:32,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:32,897 INFO L225 Difference]: With dead ends: 2573 [2021-06-05 21:22:32,897 INFO L226 Difference]: Without dead ends: 2568 [2021-06-05 21:22:32,898 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:22:32,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-06-05 21:22:32,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2418. [2021-06-05 21:22:32,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 3.00330988829127) internal successors, (7259), 2417 states have internal predecessors, (7259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7259 transitions. [2021-06-05 21:22:32,919 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7259 transitions. Word has length 20 [2021-06-05 21:22:32,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:32,919 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7259 transitions. [2021-06-05 21:22:32,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:32,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7259 transitions. [2021-06-05 21:22:32,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:32,921 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:32,921 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:33,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:33,122 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:33,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:33,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1279137115, now seen corresponding path program 97 times [2021-06-05 21:22:33,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:33,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358468646] [2021-06-05 21:22:33,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:33,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:33,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358468646] [2021-06-05 21:22:33,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358468646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:33,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772403499] [2021-06-05 21:22:33,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:33,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:33,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:33,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772403499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:33,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:33,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 21:22:33,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124359389] [2021-06-05 21:22:33,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:22:33,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:33,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:22:33,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:33,244 INFO L87 Difference]: Start difference. First operand 2418 states and 7259 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:33,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:33,375 INFO L93 Difference]: Finished difference Result 2568 states and 7475 transitions. [2021-06-05 21:22:33,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:22:33,376 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:33,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:33,378 INFO L225 Difference]: With dead ends: 2568 [2021-06-05 21:22:33,378 INFO L226 Difference]: Without dead ends: 2563 [2021-06-05 21:22:33,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:22:33,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-06-05 21:22:33,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2418. [2021-06-05 21:22:33,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.9975175837815473) internal successors, (7245), 2417 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:33,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7245 transitions. [2021-06-05 21:22:33,409 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7245 transitions. Word has length 20 [2021-06-05 21:22:33,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:33,409 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7245 transitions. [2021-06-05 21:22:33,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:33,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7245 transitions. [2021-06-05 21:22:33,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:33,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:33,412 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:33,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:33,635 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:33,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:33,635 INFO L82 PathProgramCache]: Analyzing trace with hash -185045527, now seen corresponding path program 98 times [2021-06-05 21:22:33,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:33,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855642246] [2021-06-05 21:22:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:33,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:33,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855642246] [2021-06-05 21:22:33,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855642246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:33,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413986598] [2021-06-05 21:22:33,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:33,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:33,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:33,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:33,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:33,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413986598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:33,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:33,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 21:22:33,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403220461] [2021-06-05 21:22:33,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:22:33,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:33,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:22:33,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:33,779 INFO L87 Difference]: Start difference. First operand 2418 states and 7245 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:33,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:33,886 INFO L93 Difference]: Finished difference Result 2556 states and 7520 transitions. [2021-06-05 21:22:33,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:33,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:33,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:33,888 INFO L225 Difference]: With dead ends: 2556 [2021-06-05 21:22:33,888 INFO L226 Difference]: Without dead ends: 2553 [2021-06-05 21:22:33,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:33,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-05 21:22:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2418. [2021-06-05 21:22:33,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.99669011170873) internal successors, (7243), 2417 states have internal predecessors, (7243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:33,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7243 transitions. [2021-06-05 21:22:33,910 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7243 transitions. Word has length 20 [2021-06-05 21:22:33,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:33,910 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7243 transitions. [2021-06-05 21:22:33,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:33,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7243 transitions. [2021-06-05 21:22:33,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:33,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:33,912 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:34,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-06-05 21:22:34,113 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:34,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:34,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1553610315, now seen corresponding path program 99 times [2021-06-05 21:22:34,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:34,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959346084] [2021-06-05 21:22:34,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:22:34,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:34,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959346084] [2021-06-05 21:22:34,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959346084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:34,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952589701] [2021-06-05 21:22:34,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:34,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:22:34,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:34,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:22:34,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:34,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952589701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:34,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:34,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:22:34,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027610023] [2021-06-05 21:22:34,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:22:34,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:34,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:22:34,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:22:34,228 INFO L87 Difference]: Start difference. First operand 2418 states and 7243 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:34,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:34,282 INFO L93 Difference]: Finished difference Result 2583 states and 7523 transitions. [2021-06-05 21:22:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:22:34,282 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:34,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:34,284 INFO L225 Difference]: With dead ends: 2583 [2021-06-05 21:22:34,284 INFO L226 Difference]: Without dead ends: 2581 [2021-06-05 21:22:34,284 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:34,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2021-06-05 21:22:34,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 2419. [2021-06-05 21:22:34,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2418 states have (on average 2.9971050454921424) internal successors, (7247), 2418 states have internal predecessors, (7247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:34,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 7247 transitions. [2021-06-05 21:22:34,307 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 7247 transitions. Word has length 20 [2021-06-05 21:22:34,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:34,307 INFO L482 AbstractCegarLoop]: Abstraction has 2419 states and 7247 transitions. [2021-06-05 21:22:34,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:34,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 7247 transitions. [2021-06-05 21:22:34,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:34,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:34,309 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:34,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-06-05 21:22:34,509 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:34,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:34,509 INFO L82 PathProgramCache]: Analyzing trace with hash 191844375, now seen corresponding path program 100 times [2021-06-05 21:22:34,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:34,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020368078] [2021-06-05 21:22:34,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:34,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:34,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020368078] [2021-06-05 21:22:34,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020368078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:34,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253317051] [2021-06-05 21:22:34,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:34,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:34,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:34,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:22:34,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:34,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253317051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:34,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:34,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 21:22:34,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317090134] [2021-06-05 21:22:34,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:22:34,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:34,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:22:34,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:34,638 INFO L87 Difference]: Start difference. First operand 2419 states and 7247 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:34,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:34,697 INFO L93 Difference]: Finished difference Result 2556 states and 7442 transitions. [2021-06-05 21:22:34,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:22:34,697 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:34,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:34,699 INFO L225 Difference]: With dead ends: 2556 [2021-06-05 21:22:34,699 INFO L226 Difference]: Without dead ends: 2556 [2021-06-05 21:22:34,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:34,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-06-05 21:22:34,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2398. [2021-06-05 21:22:34,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 2.994993742177722) internal successors, (7179), 2397 states have internal predecessors, (7179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 7179 transitions. [2021-06-05 21:22:34,730 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 7179 transitions. Word has length 20 [2021-06-05 21:22:34,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:34,730 INFO L482 AbstractCegarLoop]: Abstraction has 2398 states and 7179 transitions. [2021-06-05 21:22:34,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:34,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 7179 transitions. [2021-06-05 21:22:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:34,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:34,732 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:34,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-06-05 21:22:34,949 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:34,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1902457683, now seen corresponding path program 101 times [2021-06-05 21:22:34,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:34,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512202760] [2021-06-05 21:22:34,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:35,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:35,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512202760] [2021-06-05 21:22:35,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512202760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:35,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698971580] [2021-06-05 21:22:35,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:35,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:22:35,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:35,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:35,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:22:35,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698971580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:35,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:35,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-06-05 21:22:35,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300817751] [2021-06-05 21:22:35,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:35,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:35,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:35,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:35,081 INFO L87 Difference]: Start difference. First operand 2398 states and 7179 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:35,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:35,155 INFO L93 Difference]: Finished difference Result 2533 states and 7366 transitions. [2021-06-05 21:22:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:22:35,155 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:35,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:35,158 INFO L225 Difference]: With dead ends: 2533 [2021-06-05 21:22:35,158 INFO L226 Difference]: Without dead ends: 2533 [2021-06-05 21:22:35,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:22:35,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-06-05 21:22:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2394. [2021-06-05 21:22:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 2393 states have (on average 2.990388633514417) internal successors, (7156), 2393 states have internal predecessors, (7156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:35,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 7156 transitions. [2021-06-05 21:22:35,207 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 7156 transitions. Word has length 20 [2021-06-05 21:22:35,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:35,207 INFO L482 AbstractCegarLoop]: Abstraction has 2394 states and 7156 transitions. [2021-06-05 21:22:35,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:35,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 7156 transitions. [2021-06-05 21:22:35,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:35,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:35,210 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:35,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 21:22:35,425 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:35,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:35,426 INFO L82 PathProgramCache]: Analyzing trace with hash -903104617, now seen corresponding path program 102 times [2021-06-05 21:22:35,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:35,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783889519] [2021-06-05 21:22:35,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:35,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:35,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783889519] [2021-06-05 21:22:35,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783889519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:35,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120372547] [2021-06-05 21:22:35,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:35,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:22:35,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:35,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:35,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:22:35,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120372547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:35,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:35,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-06-05 21:22:35,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476345770] [2021-06-05 21:22:35,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:35,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:35,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:35,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:35,560 INFO L87 Difference]: Start difference. First operand 2394 states and 7156 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:35,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:35,666 INFO L93 Difference]: Finished difference Result 2537 states and 7365 transitions. [2021-06-05 21:22:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:35,666 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:35,668 INFO L225 Difference]: With dead ends: 2537 [2021-06-05 21:22:35,668 INFO L226 Difference]: Without dead ends: 2534 [2021-06-05 21:22:35,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:22:35,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-06-05 21:22:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2390. [2021-06-05 21:22:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.9824194223524487) internal successors, (7125), 2389 states have internal predecessors, (7125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7125 transitions. [2021-06-05 21:22:35,690 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7125 transitions. Word has length 20 [2021-06-05 21:22:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:35,690 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7125 transitions. [2021-06-05 21:22:35,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7125 transitions. [2021-06-05 21:22:35,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:35,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:35,692 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:35,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable467 [2021-06-05 21:22:35,892 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:35,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:35,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1976189997, now seen corresponding path program 103 times [2021-06-05 21:22:35,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:35,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428487061] [2021-06-05 21:22:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:35,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:35,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428487061] [2021-06-05 21:22:35,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428487061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:35,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652082171] [2021-06-05 21:22:35,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:36,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:36,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:36,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652082171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:36,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:36,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-06-05 21:22:36,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529899279] [2021-06-05 21:22:36,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:22:36,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:36,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:22:36,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:36,038 INFO L87 Difference]: Start difference. First operand 2390 states and 7125 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:36,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:36,181 INFO L93 Difference]: Finished difference Result 2538 states and 7340 transitions. [2021-06-05 21:22:36,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:22:36,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:36,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:36,184 INFO L225 Difference]: With dead ends: 2538 [2021-06-05 21:22:36,184 INFO L226 Difference]: Without dead ends: 2533 [2021-06-05 21:22:36,184 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:36,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-06-05 21:22:36,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2390. [2021-06-05 21:22:36,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.973629133528673) internal successors, (7104), 2389 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:36,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7104 transitions. [2021-06-05 21:22:36,212 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7104 transitions. Word has length 20 [2021-06-05 21:22:36,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:36,212 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7104 transitions. [2021-06-05 21:22:36,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:36,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7104 transitions. [2021-06-05 21:22:36,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:36,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:36,214 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:36,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 21:22:36,414 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:36,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:36,414 INFO L82 PathProgramCache]: Analyzing trace with hash -882098409, now seen corresponding path program 104 times [2021-06-05 21:22:36,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:36,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617426913] [2021-06-05 21:22:36,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:36,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:36,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617426913] [2021-06-05 21:22:36,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617426913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:36,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446813318] [2021-06-05 21:22:36,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:36,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:36,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:36,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:36,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:36,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446813318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:36,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:36,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-06-05 21:22:36,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127407544] [2021-06-05 21:22:36,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:22:36,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:36,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:22:36,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:36,533 INFO L87 Difference]: Start difference. First operand 2390 states and 7104 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:36,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:36,651 INFO L93 Difference]: Finished difference Result 2545 states and 7407 transitions. [2021-06-05 21:22:36,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:36,651 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:36,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:36,653 INFO L225 Difference]: With dead ends: 2545 [2021-06-05 21:22:36,653 INFO L226 Difference]: Without dead ends: 2542 [2021-06-05 21:22:36,653 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:36,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-06-05 21:22:36,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2390. [2021-06-05 21:22:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.9732105483465885) internal successors, (7103), 2389 states have internal predecessors, (7103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:36,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7103 transitions. [2021-06-05 21:22:36,680 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7103 transitions. Word has length 20 [2021-06-05 21:22:36,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:36,680 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7103 transitions. [2021-06-05 21:22:36,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:36,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7103 transitions. [2021-06-05 21:22:36,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:36,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:36,682 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:36,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 21:22:36,897 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:36,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:36,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1324997549, now seen corresponding path program 105 times [2021-06-05 21:22:36,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:36,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038211922] [2021-06-05 21:22:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:36,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:36,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038211922] [2021-06-05 21:22:36,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038211922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:36,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16681830] [2021-06-05 21:22:36,998 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 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 21:22:37,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:22:37,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:37,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:22:37,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:37,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16681830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:37,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:37,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:22:37,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396039881] [2021-06-05 21:22:37,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:22:37,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:37,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:22:37,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:37,084 INFO L87 Difference]: Start difference. First operand 2390 states and 7103 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:37,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:37,232 INFO L93 Difference]: Finished difference Result 2536 states and 7394 transitions. [2021-06-05 21:22:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:22:37,232 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:37,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:37,234 INFO L225 Difference]: With dead ends: 2536 [2021-06-05 21:22:37,234 INFO L226 Difference]: Without dead ends: 2532 [2021-06-05 21:22:37,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:37,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-06-05 21:22:37,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2390. [2021-06-05 21:22:37,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.972791963164504) internal successors, (7102), 2389 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 7102 transitions. [2021-06-05 21:22:37,262 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 7102 transitions. Word has length 20 [2021-06-05 21:22:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:37,262 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 7102 transitions. [2021-06-05 21:22:37,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 7102 transitions. [2021-06-05 21:22:37,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:37,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:37,264 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:37,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:37,464 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:37,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:37,464 INFO L82 PathProgramCache]: Analyzing trace with hash 774024681, now seen corresponding path program 106 times [2021-06-05 21:22:37,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:37,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566146708] [2021-06-05 21:22:37,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:37,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:37,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566146708] [2021-06-05 21:22:37,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566146708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:37,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065426064] [2021-06-05 21:22:37,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:37,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:37,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:37,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:22:37,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:22:37,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065426064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:37,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:37,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:22:37,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996467175] [2021-06-05 21:22:37,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:22:37,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:37,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:22:37,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:37,588 INFO L87 Difference]: Start difference. First operand 2390 states and 7102 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:37,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:37,673 INFO L93 Difference]: Finished difference Result 2507 states and 7304 transitions. [2021-06-05 21:22:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:22:37,673 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:37,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:37,675 INFO L225 Difference]: With dead ends: 2507 [2021-06-05 21:22:37,675 INFO L226 Difference]: Without dead ends: 2507 [2021-06-05 21:22:37,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:37,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-06-05 21:22:37,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2391. [2021-06-05 21:22:37,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.9728033472803346) internal successors, (7105), 2390 states have internal predecessors, (7105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:37,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7105 transitions. [2021-06-05 21:22:37,696 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7105 transitions. Word has length 20 [2021-06-05 21:22:37,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:37,696 INFO L482 AbstractCegarLoop]: Abstraction has 2391 states and 7105 transitions. [2021-06-05 21:22:37,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:37,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7105 transitions. [2021-06-05 21:22:37,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:37,698 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:37,698 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:37,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:37,899 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:37,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:37,899 INFO L82 PathProgramCache]: Analyzing trace with hash 888022761, now seen corresponding path program 107 times [2021-06-05 21:22:37,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:37,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136832615] [2021-06-05 21:22:37,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:37,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:37,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136832615] [2021-06-05 21:22:37,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136832615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:37,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416246885] [2021-06-05 21:22:37,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:38,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:22:38,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:38,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:22:38,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:38,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416246885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:38,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:38,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:22:38,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962739858] [2021-06-05 21:22:38,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:38,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:38,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:38,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:38,041 INFO L87 Difference]: Start difference. First operand 2391 states and 7105 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:38,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:38,152 INFO L93 Difference]: Finished difference Result 2530 states and 7380 transitions. [2021-06-05 21:22:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:22:38,152 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:38,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:38,154 INFO L225 Difference]: With dead ends: 2530 [2021-06-05 21:22:38,154 INFO L226 Difference]: Without dead ends: 2527 [2021-06-05 21:22:38,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:22:38,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-06-05 21:22:38,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2391. [2021-06-05 21:22:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.971548117154812) internal successors, (7102), 2390 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7102 transitions. [2021-06-05 21:22:38,180 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7102 transitions. Word has length 20 [2021-06-05 21:22:38,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:38,180 INFO L482 AbstractCegarLoop]: Abstraction has 2391 states and 7102 transitions. [2021-06-05 21:22:38,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7102 transitions. [2021-06-05 21:22:38,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:38,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:38,183 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:38,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:38,402 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:38,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:38,402 INFO L82 PathProgramCache]: Analyzing trace with hash -379434417, now seen corresponding path program 108 times [2021-06-05 21:22:38,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:38,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767129940] [2021-06-05 21:22:38,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:38,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:38,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767129940] [2021-06-05 21:22:38,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767129940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:38,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548156854] [2021-06-05 21:22:38,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:38,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:22:38,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:38,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:38,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:38,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548156854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:38,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:38,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-06-05 21:22:38,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285538670] [2021-06-05 21:22:38,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:22:38,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:38,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:22:38,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:38,527 INFO L87 Difference]: Start difference. First operand 2391 states and 7102 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:38,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:38,642 INFO L93 Difference]: Finished difference Result 2601 states and 7491 transitions. [2021-06-05 21:22:38,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:38,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:38,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:38,644 INFO L225 Difference]: With dead ends: 2601 [2021-06-05 21:22:38,644 INFO L226 Difference]: Without dead ends: 2598 [2021-06-05 21:22:38,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:38,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-06-05 21:22:38,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2391. [2021-06-05 21:22:38,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.9673640167364015) internal successors, (7092), 2390 states have internal predecessors, (7092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 7092 transitions. [2021-06-05 21:22:38,676 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 7092 transitions. Word has length 20 [2021-06-05 21:22:38,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:38,676 INFO L482 AbstractCegarLoop]: Abstraction has 2391 states and 7092 transitions. [2021-06-05 21:22:38,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:38,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 7092 transitions. [2021-06-05 21:22:38,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:38,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:38,678 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:38,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:38,879 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:38,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:38,879 INFO L82 PathProgramCache]: Analyzing trace with hash -822333557, now seen corresponding path program 109 times [2021-06-05 21:22:38,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:38,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244737657] [2021-06-05 21:22:38,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:38,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:38,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244737657] [2021-06-05 21:22:38,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244737657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:38,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383385455] [2021-06-05 21:22:38,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:38,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:38,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:39,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383385455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:39,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:39,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 13 [2021-06-05 21:22:39,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054792757] [2021-06-05 21:22:39,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:22:39,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:39,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:22:39,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:39,030 INFO L87 Difference]: Start difference. First operand 2391 states and 7092 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:39,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:39,176 INFO L93 Difference]: Finished difference Result 2612 states and 7532 transitions. [2021-06-05 21:22:39,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:39,176 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:39,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:39,178 INFO L225 Difference]: With dead ends: 2612 [2021-06-05 21:22:39,178 INFO L226 Difference]: Without dead ends: 2604 [2021-06-05 21:22:39,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:22:39,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-06-05 21:22:39,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2396. [2021-06-05 21:22:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 2.9649269311064717) internal successors, (7101), 2395 states have internal predecessors, (7101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:39,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 7101 transitions. [2021-06-05 21:22:39,200 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 7101 transitions. Word has length 20 [2021-06-05 21:22:39,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:39,200 INFO L482 AbstractCegarLoop]: Abstraction has 2396 states and 7101 transitions. [2021-06-05 21:22:39,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:39,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 7101 transitions. [2021-06-05 21:22:39,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:39,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:39,201 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:39,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-05 21:22:39,402 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:39,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:39,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1687413177, now seen corresponding path program 110 times [2021-06-05 21:22:39,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:39,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461174677] [2021-06-05 21:22:39,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:39,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:39,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461174677] [2021-06-05 21:22:39,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461174677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:39,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576777282] [2021-06-05 21:22:39,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:39,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:39,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:39,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:39,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:22:39,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576777282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:39,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:39,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 21:22:39,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018653313] [2021-06-05 21:22:39,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:22:39,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:39,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:22:39,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:22:39,509 INFO L87 Difference]: Start difference. First operand 2396 states and 7101 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:39,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:39,575 INFO L93 Difference]: Finished difference Result 2604 states and 7451 transitions. [2021-06-05 21:22:39,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:22:39,575 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:39,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:39,577 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 21:22:39,577 INFO L226 Difference]: Without dead ends: 2604 [2021-06-05 21:22:39,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:22:39,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-06-05 21:22:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2417. [2021-06-05 21:22:39,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9639900662251657) internal successors, (7161), 2416 states have internal predecessors, (7161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7161 transitions. [2021-06-05 21:22:39,599 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7161 transitions. Word has length 20 [2021-06-05 21:22:39,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:39,599 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7161 transitions. [2021-06-05 21:22:39,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:39,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7161 transitions. [2021-06-05 21:22:39,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:39,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:39,601 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:39,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-05 21:22:39,821 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:39,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:39,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1036907479, now seen corresponding path program 111 times [2021-06-05 21:22:39,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:39,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097131170] [2021-06-05 21:22:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:39,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:39,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097131170] [2021-06-05 21:22:39,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097131170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:39,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401388709] [2021-06-05 21:22:39,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:39,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:22:39,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:39,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:22:39,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:39,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401388709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:39,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:39,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:22:39,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478433749] [2021-06-05 21:22:39,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:39,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:39,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:39,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:39,933 INFO L87 Difference]: Start difference. First operand 2417 states and 7161 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:40,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:40,049 INFO L93 Difference]: Finished difference Result 2566 states and 7378 transitions. [2021-06-05 21:22:40,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:40,050 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:40,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:40,052 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 21:22:40,052 INFO L226 Difference]: Without dead ends: 2563 [2021-06-05 21:22:40,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:22:40,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-06-05 21:22:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2417. [2021-06-05 21:22:40,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9598509933774833) internal successors, (7151), 2416 states have internal predecessors, (7151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:40,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7151 transitions. [2021-06-05 21:22:40,073 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7151 transitions. Word has length 20 [2021-06-05 21:22:40,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:40,073 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7151 transitions. [2021-06-05 21:22:40,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:40,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7151 transitions. [2021-06-05 21:22:40,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:40,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:40,075 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:40,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-05 21:22:40,276 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:40,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:40,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2109992859, now seen corresponding path program 112 times [2021-06-05 21:22:40,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:40,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050728747] [2021-06-05 21:22:40,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:40,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:40,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050728747] [2021-06-05 21:22:40,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050728747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:40,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462580095] [2021-06-05 21:22:40,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:40,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:40,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:40,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:40,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:22:40,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462580095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:40,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:40,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 21:22:40,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365627330] [2021-06-05 21:22:40,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:22:40,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:40,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:22:40,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:40,388 INFO L87 Difference]: Start difference. First operand 2417 states and 7151 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:40,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:40,535 INFO L93 Difference]: Finished difference Result 2572 states and 7375 transitions. [2021-06-05 21:22:40,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:22:40,535 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:40,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:40,537 INFO L225 Difference]: With dead ends: 2572 [2021-06-05 21:22:40,537 INFO L226 Difference]: Without dead ends: 2567 [2021-06-05 21:22:40,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:40,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-06-05 21:22:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2417. [2021-06-05 21:22:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.9536423841059603) internal successors, (7136), 2416 states have internal predecessors, (7136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7136 transitions. [2021-06-05 21:22:40,558 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7136 transitions. Word has length 20 [2021-06-05 21:22:40,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:40,559 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7136 transitions. [2021-06-05 21:22:40,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:40,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7136 transitions. [2021-06-05 21:22:40,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:40,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:40,560 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:40,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 21:22:40,761 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:40,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:40,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1015901271, now seen corresponding path program 113 times [2021-06-05 21:22:40,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:40,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133448183] [2021-06-05 21:22:40,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:40,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:40,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133448183] [2021-06-05 21:22:40,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133448183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:40,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828076642] [2021-06-05 21:22:40,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:40,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:22:40,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:40,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:22:40,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:40,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828076642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:40,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:40,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:22:40,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678038258] [2021-06-05 21:22:40,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:22:40,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:40,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:22:40,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:22:40,889 INFO L87 Difference]: Start difference. First operand 2417 states and 7136 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:41,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:41,035 INFO L93 Difference]: Finished difference Result 2577 states and 7366 transitions. [2021-06-05 21:22:41,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:22:41,036 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:41,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:41,038 INFO L225 Difference]: With dead ends: 2577 [2021-06-05 21:22:41,038 INFO L226 Difference]: Without dead ends: 2571 [2021-06-05 21:22:41,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:22:41,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-06-05 21:22:41,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2418. [2021-06-05 21:22:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.945800579230451) internal successors, (7120), 2417 states have internal predecessors, (7120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:41,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 7120 transitions. [2021-06-05 21:22:41,060 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 7120 transitions. Word has length 20 [2021-06-05 21:22:41,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:41,060 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 7120 transitions. [2021-06-05 21:22:41,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:41,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 7120 transitions. [2021-06-05 21:22:41,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:41,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:41,062 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:41,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:41,274 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:41,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:41,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1458800411, now seen corresponding path program 114 times [2021-06-05 21:22:41,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:41,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123328576] [2021-06-05 21:22:41,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:41,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:41,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123328576] [2021-06-05 21:22:41,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123328576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:41,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086305875] [2021-06-05 21:22:41,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:41,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:22:41,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:41,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:41,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:41,416 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:41,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086305875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:41,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:41,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 21:22:41,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227564554] [2021-06-05 21:22:41,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:22:41,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:41,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:22:41,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:22:41,417 INFO L87 Difference]: Start difference. First operand 2418 states and 7120 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:41,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:41,553 INFO L93 Difference]: Finished difference Result 2689 states and 7651 transitions. [2021-06-05 21:22:41,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:22:41,553 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:41,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:41,555 INFO L225 Difference]: With dead ends: 2689 [2021-06-05 21:22:41,555 INFO L226 Difference]: Without dead ends: 2681 [2021-06-05 21:22:41,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:22:41,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2021-06-05 21:22:41,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2420. [2021-06-05 21:22:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2419 states have (on average 2.9450186027284) internal successors, (7124), 2419 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:41,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 7124 transitions. [2021-06-05 21:22:41,577 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 7124 transitions. Word has length 20 [2021-06-05 21:22:41,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:41,577 INFO L482 AbstractCegarLoop]: Abstraction has 2420 states and 7124 transitions. [2021-06-05 21:22:41,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:41,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 7124 transitions. [2021-06-05 21:22:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:41,579 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:41,579 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:41,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-06-05 21:22:41,793 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:41,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1991195433, now seen corresponding path program 115 times [2021-06-05 21:22:41,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:41,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250819295] [2021-06-05 21:22:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:41,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:41,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250819295] [2021-06-05 21:22:41,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250819295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:41,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117435070] [2021-06-05 21:22:41,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:41,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:41,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:41,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117435070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:41,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:41,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 21:22:41,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014900550] [2021-06-05 21:22:41,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:22:41,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:41,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:22:41,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:22:41,920 INFO L87 Difference]: Start difference. First operand 2420 states and 7124 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:42,064 INFO L93 Difference]: Finished difference Result 2675 states and 7629 transitions. [2021-06-05 21:22:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:22:42,064 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:42,067 INFO L225 Difference]: With dead ends: 2675 [2021-06-05 21:22:42,067 INFO L226 Difference]: Without dead ends: 2660 [2021-06-05 21:22:42,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:22:42,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-06-05 21:22:42,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2425. [2021-06-05 21:22:42,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.942656765676568) internal successors, (7133), 2424 states have internal predecessors, (7133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7133 transitions. [2021-06-05 21:22:42,088 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7133 transitions. Word has length 20 [2021-06-05 21:22:42,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:42,089 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 7133 transitions. [2021-06-05 21:22:42,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:42,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7133 transitions. [2021-06-05 21:22:42,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:42,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:42,090 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:42,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:42,291 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:42,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:42,291 INFO L82 PathProgramCache]: Analyzing trace with hash -823260751, now seen corresponding path program 116 times [2021-06-05 21:22:42,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:42,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255832570] [2021-06-05 21:22:42,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:42,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:42,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255832570] [2021-06-05 21:22:42,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255832570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:42,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567878303] [2021-06-05 21:22:42,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:42,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:42,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:42,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:22:42,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:42,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567878303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:42,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:42,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:22:42,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426508085] [2021-06-05 21:22:42,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:42,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:42,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:42,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:42,415 INFO L87 Difference]: Start difference. First operand 2425 states and 7133 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:42,505 INFO L93 Difference]: Finished difference Result 2669 states and 7579 transitions. [2021-06-05 21:22:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:22:42,506 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:42,508 INFO L225 Difference]: With dead ends: 2669 [2021-06-05 21:22:42,508 INFO L226 Difference]: Without dead ends: 2669 [2021-06-05 21:22:42,508 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:22:42,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2021-06-05 21:22:42,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 2472. [2021-06-05 21:22:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9405099150141645) internal successors, (7266), 2471 states have internal predecessors, (7266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:42,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7266 transitions. [2021-06-05 21:22:42,530 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7266 transitions. Word has length 20 [2021-06-05 21:22:42,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:42,530 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7266 transitions. [2021-06-05 21:22:42,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:42,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7266 transitions. [2021-06-05 21:22:42,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:42,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:42,532 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:42,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:42,733 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:42,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:42,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1875348307, now seen corresponding path program 117 times [2021-06-05 21:22:42,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:42,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943884604] [2021-06-05 21:22:42,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:42,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:42,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943884604] [2021-06-05 21:22:42,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943884604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:42,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052936360] [2021-06-05 21:22:42,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:42,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:22:42,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:42,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:22:42,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:42,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052936360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:42,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:42,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:22:42,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787450253] [2021-06-05 21:22:42,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:22:42,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:42,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:22:42,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:42,852 INFO L87 Difference]: Start difference. First operand 2472 states and 7266 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:42,959 INFO L93 Difference]: Finished difference Result 2639 states and 7604 transitions. [2021-06-05 21:22:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:22:42,960 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:42,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:42,962 INFO L225 Difference]: With dead ends: 2639 [2021-06-05 21:22:42,962 INFO L226 Difference]: Without dead ends: 2635 [2021-06-05 21:22:42,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:42,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-06-05 21:22:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2472. [2021-06-05 21:22:42,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9384864427357344) internal successors, (7261), 2471 states have internal predecessors, (7261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:42,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7261 transitions. [2021-06-05 21:22:42,983 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7261 transitions. Word has length 20 [2021-06-05 21:22:42,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:42,983 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7261 transitions. [2021-06-05 21:22:42,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:42,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7261 transitions. [2021-06-05 21:22:42,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:42,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:42,985 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:43,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable482 [2021-06-05 21:22:43,185 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:43,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:43,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1238881453, now seen corresponding path program 118 times [2021-06-05 21:22:43,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:43,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708486791] [2021-06-05 21:22:43,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:43,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:43,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708486791] [2021-06-05 21:22:43,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708486791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:43,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67676815] [2021-06-05 21:22:43,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:43,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:43,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:43,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:43,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:43,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67676815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:43,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:43,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 21:22:43,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667251723] [2021-06-05 21:22:43,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:22:43,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:43,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:22:43,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:22:43,326 INFO L87 Difference]: Start difference. First operand 2472 states and 7261 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:43,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:43,457 INFO L93 Difference]: Finished difference Result 2718 states and 7731 transitions. [2021-06-05 21:22:43,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:22:43,457 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:43,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:43,459 INFO L225 Difference]: With dead ends: 2718 [2021-06-05 21:22:43,459 INFO L226 Difference]: Without dead ends: 2714 [2021-06-05 21:22:43,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:22:43,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-06-05 21:22:43,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2472. [2021-06-05 21:22:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.9348441926345608) internal successors, (7252), 2471 states have internal predecessors, (7252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:43,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 7252 transitions. [2021-06-05 21:22:43,481 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 7252 transitions. Word has length 20 [2021-06-05 21:22:43,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:43,481 INFO L482 AbstractCegarLoop]: Abstraction has 2472 states and 7252 transitions. [2021-06-05 21:22:43,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:43,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 7252 transitions. [2021-06-05 21:22:43,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:43,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:43,483 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:43,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:43,683 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:43,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:43,684 INFO L82 PathProgramCache]: Analyzing trace with hash 393910001, now seen corresponding path program 119 times [2021-06-05 21:22:43,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:43,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659746336] [2021-06-05 21:22:43,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:43,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:43,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659746336] [2021-06-05 21:22:43,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659746336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:43,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82994811] [2021-06-05 21:22:43,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:43,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:22:43,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:43,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:43,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:43,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82994811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:43,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:43,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 21:22:43,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837002870] [2021-06-05 21:22:43,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:22:43,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:43,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:22:43,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:22:43,814 INFO L87 Difference]: Start difference. First operand 2472 states and 7252 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:43,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:43,948 INFO L93 Difference]: Finished difference Result 2775 states and 7866 transitions. [2021-06-05 21:22:43,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:22:43,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:43,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:43,951 INFO L225 Difference]: With dead ends: 2775 [2021-06-05 21:22:43,951 INFO L226 Difference]: Without dead ends: 2760 [2021-06-05 21:22:43,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:22:43,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-06-05 21:22:43,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2486. [2021-06-05 21:22:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 2.9287726358148896) internal successors, (7278), 2485 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:43,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 7278 transitions. [2021-06-05 21:22:43,972 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 7278 transitions. Word has length 20 [2021-06-05 21:22:43,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:43,973 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 7278 transitions. [2021-06-05 21:22:43,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:43,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 7278 transitions. [2021-06-05 21:22:43,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:43,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:43,974 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:44,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:44,175 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:44,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:44,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1540334603, now seen corresponding path program 120 times [2021-06-05 21:22:44,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:44,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92962708] [2021-06-05 21:22:44,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:44,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:44,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92962708] [2021-06-05 21:22:44,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92962708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:44,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399461377] [2021-06-05 21:22:44,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:44,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:22:44,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:44,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:44,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:22:44,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399461377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:44,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:44,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-06-05 21:22:44,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982542362] [2021-06-05 21:22:44,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:44,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:44,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:44,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:44,319 INFO L87 Difference]: Start difference. First operand 2486 states and 7278 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 21:22:44,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:44,391 INFO L93 Difference]: Finished difference Result 2905 states and 8228 transitions. [2021-06-05 21:22:44,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:22:44,391 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 20 [2021-06-05 21:22:44,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:44,393 INFO L225 Difference]: With dead ends: 2905 [2021-06-05 21:22:44,394 INFO L226 Difference]: Without dead ends: 2905 [2021-06-05 21:22:44,394 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:22:44,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-06-05 21:22:44,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2666. [2021-06-05 21:22:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.9448405253283303) internal successors, (7848), 2665 states have internal predecessors, (7848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:44,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7848 transitions. [2021-06-05 21:22:44,417 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7848 transitions. Word has length 20 [2021-06-05 21:22:44,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:44,417 INFO L482 AbstractCegarLoop]: Abstraction has 2666 states and 7848 transitions. [2021-06-05 21:22:44,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 21:22:44,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7848 transitions. [2021-06-05 21:22:44,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:44,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:44,419 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:44,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-05 21:22:44,619 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:44,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:44,620 INFO L82 PathProgramCache]: Analyzing trace with hash -889828905, now seen corresponding path program 121 times [2021-06-05 21:22:44,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:44,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592827518] [2021-06-05 21:22:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:44,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:44,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592827518] [2021-06-05 21:22:44,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592827518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:44,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71514390] [2021-06-05 21:22:44,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:44,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:44,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:44,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71514390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:44,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:44,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 12 [2021-06-05 21:22:44,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404827326] [2021-06-05 21:22:44,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:22:44,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:44,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:22:44,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:22:44,733 INFO L87 Difference]: Start difference. First operand 2666 states and 7848 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:44,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:44,847 INFO L93 Difference]: Finished difference Result 2846 states and 8143 transitions. [2021-06-05 21:22:44,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:44,847 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:44,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:44,850 INFO L225 Difference]: With dead ends: 2846 [2021-06-05 21:22:44,850 INFO L226 Difference]: Without dead ends: 2845 [2021-06-05 21:22:44,850 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:22:44,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2021-06-05 21:22:44,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2666. [2021-06-05 21:22:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.94296435272045) internal successors, (7843), 2665 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7843 transitions. [2021-06-05 21:22:44,874 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7843 transitions. Word has length 20 [2021-06-05 21:22:44,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:44,874 INFO L482 AbstractCegarLoop]: Abstraction has 2666 states and 7843 transitions. [2021-06-05 21:22:44,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:44,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7843 transitions. [2021-06-05 21:22:44,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:44,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:44,876 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:45,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable486,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:45,076 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:45,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:45,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1962914285, now seen corresponding path program 122 times [2021-06-05 21:22:45,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:45,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502205152] [2021-06-05 21:22:45,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:45,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:45,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502205152] [2021-06-05 21:22:45,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502205152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:45,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211211814] [2021-06-05 21:22:45,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:45,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:45,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:45,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:45,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:45,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211211814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:45,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:45,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 21:22:45,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321678206] [2021-06-05 21:22:45,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:22:45,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:45,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:22:45,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:45,193 INFO L87 Difference]: Start difference. First operand 2666 states and 7843 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:45,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:45,318 INFO L93 Difference]: Finished difference Result 2854 states and 8145 transitions. [2021-06-05 21:22:45,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:22:45,319 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:45,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:45,321 INFO L225 Difference]: With dead ends: 2854 [2021-06-05 21:22:45,321 INFO L226 Difference]: Without dead ends: 2849 [2021-06-05 21:22:45,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:45,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2021-06-05 21:22:45,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2687. [2021-06-05 21:22:45,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.9389426656738644) internal successors, (7894), 2686 states have internal predecessors, (7894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:45,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7894 transitions. [2021-06-05 21:22:45,346 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7894 transitions. Word has length 20 [2021-06-05 21:22:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:45,346 INFO L482 AbstractCegarLoop]: Abstraction has 2687 states and 7894 transitions. [2021-06-05 21:22:45,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:45,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7894 transitions. [2021-06-05 21:22:45,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:45,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:45,348 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:45,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-06-05 21:22:45,569 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:45,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:45,569 INFO L82 PathProgramCache]: Analyzing trace with hash -868822697, now seen corresponding path program 123 times [2021-06-05 21:22:45,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:45,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323925724] [2021-06-05 21:22:45,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:45,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:45,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323925724] [2021-06-05 21:22:45,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323925724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:45,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175599242] [2021-06-05 21:22:45,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:45,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:22:45,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:45,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:45,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:22:45,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175599242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:45,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:45,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 21:22:45,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40509280] [2021-06-05 21:22:45,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:22:45,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:45,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:22:45,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:22:45,699 INFO L87 Difference]: Start difference. First operand 2687 states and 7894 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:45,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:45,813 INFO L93 Difference]: Finished difference Result 3212 states and 8981 transitions. [2021-06-05 21:22:45,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:22:45,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:45,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:45,816 INFO L225 Difference]: With dead ends: 3212 [2021-06-05 21:22:45,816 INFO L226 Difference]: Without dead ends: 3209 [2021-06-05 21:22:45,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:22:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2021-06-05 21:22:45,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2687. [2021-06-05 21:22:45,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.937453462397617) internal successors, (7890), 2686 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:45,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7890 transitions. [2021-06-05 21:22:45,840 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7890 transitions. Word has length 20 [2021-06-05 21:22:45,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:45,840 INFO L482 AbstractCegarLoop]: Abstraction has 2687 states and 7890 transitions. [2021-06-05 21:22:45,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7890 transitions. [2021-06-05 21:22:45,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:45,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:45,842 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:46,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-05 21:22:46,043 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:46,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:46,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1311721837, now seen corresponding path program 124 times [2021-06-05 21:22:46,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:46,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400763227] [2021-06-05 21:22:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:46,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:46,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400763227] [2021-06-05 21:22:46,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400763227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:46,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399034554] [2021-06-05 21:22:46,111 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 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 21:22:46,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:46,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:46,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:46,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:46,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399034554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:46,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:46,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 21:22:46,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271107460] [2021-06-05 21:22:46,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:22:46,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:46,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:22:46,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:22:46,172 INFO L87 Difference]: Start difference. First operand 2687 states and 7890 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:46,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:46,306 INFO L93 Difference]: Finished difference Result 3217 states and 8981 transitions. [2021-06-05 21:22:46,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:22:46,306 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:46,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:46,309 INFO L225 Difference]: With dead ends: 3217 [2021-06-05 21:22:46,309 INFO L226 Difference]: Without dead ends: 3209 [2021-06-05 21:22:46,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:22:46,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2021-06-05 21:22:46,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2709. [2021-06-05 21:22:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.9309453471196454) internal successors, (7937), 2708 states have internal predecessors, (7937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:46,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7937 transitions. [2021-06-05 21:22:46,335 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7937 transitions. Word has length 20 [2021-06-05 21:22:46,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:46,335 INFO L482 AbstractCegarLoop]: Abstraction has 2709 states and 7937 transitions. [2021-06-05 21:22:46,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:46,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7937 transitions. [2021-06-05 21:22:46,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:46,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:46,337 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:46,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 21:22:46,540 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:46,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:46,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2138274007, now seen corresponding path program 125 times [2021-06-05 21:22:46,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:46,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071013374] [2021-06-05 21:22:46,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:46,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:46,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071013374] [2021-06-05 21:22:46,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071013374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:46,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840309761] [2021-06-05 21:22:46,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:46,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:22:46,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:46,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:46,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:46,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840309761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:46,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:46,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 21:22:46,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311582282] [2021-06-05 21:22:46,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:22:46,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:46,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:22:46,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:22:46,673 INFO L87 Difference]: Start difference. First operand 2709 states and 7937 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:46,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:46,794 INFO L93 Difference]: Finished difference Result 3000 states and 8519 transitions. [2021-06-05 21:22:46,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:22:46,795 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:46,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:46,797 INFO L225 Difference]: With dead ends: 3000 [2021-06-05 21:22:46,797 INFO L226 Difference]: Without dead ends: 2995 [2021-06-05 21:22:46,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:22:46,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-06-05 21:22:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2709. [2021-06-05 21:22:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.930576070901034) internal successors, (7936), 2708 states have internal predecessors, (7936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:46,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7936 transitions. [2021-06-05 21:22:46,822 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7936 transitions. Word has length 20 [2021-06-05 21:22:46,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:46,822 INFO L482 AbstractCegarLoop]: Abstraction has 2709 states and 7936 transitions. [2021-06-05 21:22:46,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:46,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7936 transitions. [2021-06-05 21:22:46,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:46,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:46,824 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:47,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:47,025 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:47,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:47,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1713962771, now seen corresponding path program 126 times [2021-06-05 21:22:47,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:47,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284654940] [2021-06-05 21:22:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:47,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:47,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284654940] [2021-06-05 21:22:47,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284654940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:47,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142125459] [2021-06-05 21:22:47,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:47,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:22:47,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:47,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:47,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:47,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142125459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:47,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:47,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 21:22:47,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782426612] [2021-06-05 21:22:47,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:22:47,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:47,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:22:47,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:22:47,184 INFO L87 Difference]: Start difference. First operand 2709 states and 7936 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:47,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:47,300 INFO L93 Difference]: Finished difference Result 2966 states and 8462 transitions. [2021-06-05 21:22:47,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:22:47,301 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:47,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:47,303 INFO L225 Difference]: With dead ends: 2966 [2021-06-05 21:22:47,303 INFO L226 Difference]: Without dead ends: 2960 [2021-06-05 21:22:47,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:22:47,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-06-05 21:22:47,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2709. [2021-06-05 21:22:47,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2708 states have (on average 2.9302067946824226) internal successors, (7935), 2708 states have internal predecessors, (7935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 7935 transitions. [2021-06-05 21:22:47,342 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 7935 transitions. Word has length 20 [2021-06-05 21:22:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:47,342 INFO L482 AbstractCegarLoop]: Abstraction has 2709 states and 7935 transitions. [2021-06-05 21:22:47,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:47,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 7935 transitions. [2021-06-05 21:22:47,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:47,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:47,345 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:47,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-06-05 21:22:47,561 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:47,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:47,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1200498409, now seen corresponding path program 127 times [2021-06-05 21:22:47,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:47,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154145282] [2021-06-05 21:22:47,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:47,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:47,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154145282] [2021-06-05 21:22:47,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154145282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:47,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876098362] [2021-06-05 21:22:47,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:47,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:22:47,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:47,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876098362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:47,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:47,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:22:47,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637840733] [2021-06-05 21:22:47,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:22:47,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:47,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:22:47,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:22:47,766 INFO L87 Difference]: Start difference. First operand 2709 states and 7935 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:47,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:47,888 INFO L93 Difference]: Finished difference Result 2994 states and 8494 transitions. [2021-06-05 21:22:47,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:22:47,888 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:47,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:47,891 INFO L225 Difference]: With dead ends: 2994 [2021-06-05 21:22:47,891 INFO L226 Difference]: Without dead ends: 2994 [2021-06-05 21:22:47,891 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:22:47,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2021-06-05 21:22:47,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 2744. [2021-06-05 21:22:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.930368209989063) internal successors, (8038), 2743 states have internal predecessors, (8038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 8038 transitions. [2021-06-05 21:22:47,918 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 8038 transitions. Word has length 20 [2021-06-05 21:22:47,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:47,919 INFO L482 AbstractCegarLoop]: Abstraction has 2744 states and 8038 transitions. [2021-06-05 21:22:47,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:47,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 8038 transitions. [2021-06-05 21:22:47,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:47,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:47,921 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:48,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:48,121 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:48,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:48,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1877298135, now seen corresponding path program 128 times [2021-06-05 21:22:48,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:48,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924546320] [2021-06-05 21:22:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:48,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:48,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924546320] [2021-06-05 21:22:48,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924546320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:48,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468211496] [2021-06-05 21:22:48,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:48,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:48,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:48,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:48,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:48,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468211496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:48,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:48,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-06-05 21:22:48,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749252270] [2021-06-05 21:22:48,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:22:48,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:48,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:22:48,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:22:48,260 INFO L87 Difference]: Start difference. First operand 2744 states and 8038 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:48,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:48,389 INFO L93 Difference]: Finished difference Result 2954 states and 8469 transitions. [2021-06-05 21:22:48,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:22:48,389 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:48,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:48,392 INFO L225 Difference]: With dead ends: 2954 [2021-06-05 21:22:48,392 INFO L226 Difference]: Without dead ends: 2949 [2021-06-05 21:22:48,392 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:22:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-06-05 21:22:48,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2744. [2021-06-05 21:22:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.9292745169522423) internal successors, (8035), 2743 states have internal predecessors, (8035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:48,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 8035 transitions. [2021-06-05 21:22:48,417 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 8035 transitions. Word has length 20 [2021-06-05 21:22:48,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:48,417 INFO L482 AbstractCegarLoop]: Abstraction has 2744 states and 8035 transitions. [2021-06-05 21:22:48,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:48,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 8035 transitions. [2021-06-05 21:22:48,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:48,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:48,419 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:48,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:48,619 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:48,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:48,619 INFO L82 PathProgramCache]: Analyzing trace with hash -132934129, now seen corresponding path program 129 times [2021-06-05 21:22:48,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:48,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666248421] [2021-06-05 21:22:48,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:48,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:48,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666248421] [2021-06-05 21:22:48,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666248421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:48,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010513915] [2021-06-05 21:22:48,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:48,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:22:48,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:48,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:22:48,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:48,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010513915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:48,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:48,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 21:22:48,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80429423] [2021-06-05 21:22:48,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:22:48,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:48,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:22:48,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:22:48,764 INFO L87 Difference]: Start difference. First operand 2744 states and 8035 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:48,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:48,894 INFO L93 Difference]: Finished difference Result 3147 states and 8824 transitions. [2021-06-05 21:22:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:22:48,895 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:48,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:48,897 INFO L225 Difference]: With dead ends: 3147 [2021-06-05 21:22:48,897 INFO L226 Difference]: Without dead ends: 3132 [2021-06-05 21:22:48,898 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:22:48,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-06-05 21:22:48,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 2748. [2021-06-05 21:22:48,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 2.9257371678194395) internal successors, (8037), 2747 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:48,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 8037 transitions. [2021-06-05 21:22:48,928 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 8037 transitions. Word has length 20 [2021-06-05 21:22:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:48,928 INFO L482 AbstractCegarLoop]: Abstraction has 2748 states and 8037 transitions. [2021-06-05 21:22:48,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 8037 transitions. [2021-06-05 21:22:48,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:48,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:48,944 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:49,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:49,153 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:49,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:49,153 INFO L82 PathProgramCache]: Analyzing trace with hash -557245365, now seen corresponding path program 130 times [2021-06-05 21:22:49,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:49,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600216460] [2021-06-05 21:22:49,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:49,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:49,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600216460] [2021-06-05 21:22:49,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600216460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:49,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680083405] [2021-06-05 21:22:49,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:49,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:49,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:49,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:49,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:49,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680083405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:49,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:49,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-06-05 21:22:49,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723099058] [2021-06-05 21:22:49,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:22:49,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:49,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:22:49,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:22:49,293 INFO L87 Difference]: Start difference. First operand 2748 states and 8037 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:49,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:49,416 INFO L93 Difference]: Finished difference Result 3023 states and 8605 transitions. [2021-06-05 21:22:49,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:49,417 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:49,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:49,419 INFO L225 Difference]: With dead ends: 3023 [2021-06-05 21:22:49,419 INFO L226 Difference]: Without dead ends: 3017 [2021-06-05 21:22:49,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:22:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-06-05 21:22:49,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2748. [2021-06-05 21:22:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 2.925373134328358) internal successors, (8036), 2747 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 8036 transitions. [2021-06-05 21:22:49,444 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 8036 transitions. Word has length 20 [2021-06-05 21:22:49,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:49,444 INFO L482 AbstractCegarLoop]: Abstraction has 2748 states and 8036 transitions. [2021-06-05 21:22:49,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:49,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 8036 transitions. [2021-06-05 21:22:49,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:49,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:49,446 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:49,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:49,646 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:49,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:49,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1275866105, now seen corresponding path program 131 times [2021-06-05 21:22:49,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:49,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618393353] [2021-06-05 21:22:49,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:49,711 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:49,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:49,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618393353] [2021-06-05 21:22:49,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618393353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:49,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243876029] [2021-06-05 21:22:49,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:49,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:22:49,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:49,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:49,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:49,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243876029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:49,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:49,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2021-06-05 21:22:49,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368948709] [2021-06-05 21:22:49,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:22:49,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:49,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:22:49,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:22:49,790 INFO L87 Difference]: Start difference. First operand 2748 states and 8036 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:49,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:49,878 INFO L93 Difference]: Finished difference Result 3263 states and 9284 transitions. [2021-06-05 21:22:49,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:22:49,879 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:49,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:49,881 INFO L225 Difference]: With dead ends: 3263 [2021-06-05 21:22:49,881 INFO L226 Difference]: Without dead ends: 3263 [2021-06-05 21:22:49,881 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:22:49,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2021-06-05 21:22:49,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 3010. [2021-06-05 21:22:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 2.9478231970754405) internal successors, (8870), 3009 states have internal predecessors, (8870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:49,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 8870 transitions. [2021-06-05 21:22:49,910 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 8870 transitions. Word has length 20 [2021-06-05 21:22:49,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:49,910 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 8870 transitions. [2021-06-05 21:22:49,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:49,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 8870 transitions. [2021-06-05 21:22:49,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:49,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:49,912 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:50,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 21:22:50,113 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:50,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:50,113 INFO L82 PathProgramCache]: Analyzing trace with hash -625360407, now seen corresponding path program 132 times [2021-06-05 21:22:50,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:50,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822378422] [2021-06-05 21:22:50,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:50,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:50,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822378422] [2021-06-05 21:22:50,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822378422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:50,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942386940] [2021-06-05 21:22:50,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:50,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:22:50,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:50,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:50,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:22:50,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942386940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:50,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:50,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 14 [2021-06-05 21:22:50,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295548771] [2021-06-05 21:22:50,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:22:50,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:50,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:22:50,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:22:50,240 INFO L87 Difference]: Start difference. First operand 3010 states and 8870 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:50,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:50,373 INFO L93 Difference]: Finished difference Result 3211 states and 9205 transitions. [2021-06-05 21:22:50,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:22:50,374 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:50,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:50,376 INFO L225 Difference]: With dead ends: 3211 [2021-06-05 21:22:50,376 INFO L226 Difference]: Without dead ends: 3210 [2021-06-05 21:22:50,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:22:50,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2021-06-05 21:22:50,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3010. [2021-06-05 21:22:50,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 2.94749086075108) internal successors, (8869), 3009 states have internal predecessors, (8869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 8869 transitions. [2021-06-05 21:22:50,405 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 8869 transitions. Word has length 20 [2021-06-05 21:22:50,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:50,405 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 8869 transitions. [2021-06-05 21:22:50,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:50,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 8869 transitions. [2021-06-05 21:22:50,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:50,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:50,408 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:50,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 21:22:50,608 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:50,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:50,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1698445787, now seen corresponding path program 133 times [2021-06-05 21:22:50,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:50,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405362559] [2021-06-05 21:22:50,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:50,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:50,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405362559] [2021-06-05 21:22:50,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405362559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:50,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063900029] [2021-06-05 21:22:50,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:50,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:50,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:50,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063900029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:50,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:50,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-06-05 21:22:50,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146656386] [2021-06-05 21:22:50,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:22:50,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:50,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:22:50,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:22:50,774 INFO L87 Difference]: Start difference. First operand 3010 states and 8869 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:50,913 INFO L93 Difference]: Finished difference Result 3214 states and 9207 transitions. [2021-06-05 21:22:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:22:50,913 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:50,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:50,916 INFO L225 Difference]: With dead ends: 3214 [2021-06-05 21:22:50,916 INFO L226 Difference]: Without dead ends: 3211 [2021-06-05 21:22:50,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:22:50,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-06-05 21:22:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 3017. [2021-06-05 21:22:50,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9462864721485413) internal successors, (8886), 3016 states have internal predecessors, (8886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8886 transitions. [2021-06-05 21:22:50,944 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8886 transitions. Word has length 20 [2021-06-05 21:22:50,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:50,944 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8886 transitions. [2021-06-05 21:22:50,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:50,944 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8886 transitions. [2021-06-05 21:22:50,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:50,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:50,946 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:51,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 21:22:51,147 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:51,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:51,147 INFO L82 PathProgramCache]: Analyzing trace with hash -604354199, now seen corresponding path program 134 times [2021-06-05 21:22:51,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:51,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465632625] [2021-06-05 21:22:51,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:51,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:51,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465632625] [2021-06-05 21:22:51,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465632625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:51,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037535818] [2021-06-05 21:22:51,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:51,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:51,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:51,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:51,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:51,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037535818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:51,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:51,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-06-05 21:22:51,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417234057] [2021-06-05 21:22:51,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:22:51,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:51,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:22:51,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:22:51,285 INFO L87 Difference]: Start difference. First operand 3017 states and 8886 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:51,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:51,410 INFO L93 Difference]: Finished difference Result 3712 states and 10403 transitions. [2021-06-05 21:22:51,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:22:51,410 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:51,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:51,413 INFO L225 Difference]: With dead ends: 3712 [2021-06-05 21:22:51,413 INFO L226 Difference]: Without dead ends: 3709 [2021-06-05 21:22:51,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:22:51,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3709 states. [2021-06-05 21:22:51,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3709 to 3017. [2021-06-05 21:22:51,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9449602122015914) internal successors, (8882), 3016 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:51,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8882 transitions. [2021-06-05 21:22:51,442 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8882 transitions. Word has length 20 [2021-06-05 21:22:51,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:51,442 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8882 transitions. [2021-06-05 21:22:51,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8882 transitions. [2021-06-05 21:22:51,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:51,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:51,444 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:51,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 21:22:51,645 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:51,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:51,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1047253339, now seen corresponding path program 135 times [2021-06-05 21:22:51,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:51,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850786134] [2021-06-05 21:22:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:51,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:51,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850786134] [2021-06-05 21:22:51,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850786134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:51,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6497783] [2021-06-05 21:22:51,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:51,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:22:51,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:51,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:51,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:22:51,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6497783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:51,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:51,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-06-05 21:22:51,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986341210] [2021-06-05 21:22:51,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:22:51,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:51,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:22:51,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:22:51,799 INFO L87 Difference]: Start difference. First operand 3017 states and 8882 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:51,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:51,924 INFO L93 Difference]: Finished difference Result 3583 states and 10063 transitions. [2021-06-05 21:22:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:22:51,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:51,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:51,927 INFO L225 Difference]: With dead ends: 3583 [2021-06-05 21:22:51,927 INFO L226 Difference]: Without dead ends: 3579 [2021-06-05 21:22:51,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:22:51,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3579 states. [2021-06-05 21:22:51,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3579 to 3017. [2021-06-05 21:22:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.944297082228117) internal successors, (8880), 3016 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:51,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8880 transitions. [2021-06-05 21:22:51,956 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8880 transitions. Word has length 20 [2021-06-05 21:22:51,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:51,956 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8880 transitions. [2021-06-05 21:22:51,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:51,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8880 transitions. [2021-06-05 21:22:51,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:51,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:51,958 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:52,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:52,159 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:52,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:52,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1892224791, now seen corresponding path program 136 times [2021-06-05 21:22:52,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:52,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679039154] [2021-06-05 21:22:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:52,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:52,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679039154] [2021-06-05 21:22:52,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679039154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:52,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443371101] [2021-06-05 21:22:52,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:52,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:52,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:52,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:52,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:52,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443371101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:52,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:52,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 16 [2021-06-05 21:22:52,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701543813] [2021-06-05 21:22:52,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:22:52,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:52,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:22:52,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:52,401 INFO L87 Difference]: Start difference. First operand 3017 states and 8880 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:52,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:52,565 INFO L93 Difference]: Finished difference Result 3595 states and 10071 transitions. [2021-06-05 21:22:52,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:22:52,565 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:52,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:52,570 INFO L225 Difference]: With dead ends: 3595 [2021-06-05 21:22:52,570 INFO L226 Difference]: Without dead ends: 3580 [2021-06-05 21:22:52,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:22:52,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2021-06-05 21:22:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 3038. [2021-06-05 21:22:52,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.9400724399078038) internal successors, (8929), 3037 states have internal predecessors, (8929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8929 transitions. [2021-06-05 21:22:52,616 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8929 transitions. Word has length 20 [2021-06-05 21:22:52,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:52,617 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 8929 transitions. [2021-06-05 21:22:52,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:52,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8929 transitions. [2021-06-05 21:22:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:52,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:52,620 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:52,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-05 21:22:52,833 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:52,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:52,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1978431269, now seen corresponding path program 137 times [2021-06-05 21:22:52,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:52,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757277687] [2021-06-05 21:22:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:52,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:52,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757277687] [2021-06-05 21:22:52,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757277687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:52,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007113181] [2021-06-05 21:22:52,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:52,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:22:52,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:52,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:52,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:52,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007113181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:52,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:52,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 16 [2021-06-05 21:22:52,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692169206] [2021-06-05 21:22:52,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:22:52,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:52,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:22:52,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:22:52,986 INFO L87 Difference]: Start difference. First operand 3038 states and 8929 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:53,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:53,116 INFO L93 Difference]: Finished difference Result 3383 states and 9628 transitions. [2021-06-05 21:22:53,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:22:53,116 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:53,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:53,119 INFO L225 Difference]: With dead ends: 3383 [2021-06-05 21:22:53,119 INFO L226 Difference]: Without dead ends: 3377 [2021-06-05 21:22:53,119 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:22:53,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2021-06-05 21:22:53,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 3038. [2021-06-05 21:22:53,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.939743167599605) internal successors, (8928), 3037 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:53,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8928 transitions. [2021-06-05 21:22:53,148 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8928 transitions. Word has length 20 [2021-06-05 21:22:53,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:53,148 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 8928 transitions. [2021-06-05 21:22:53,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:53,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8928 transitions. [2021-06-05 21:22:53,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:22:53,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:53,150 INFO L554 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:53,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-06-05 21:22:53,350 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:53,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:53,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1709684841, now seen corresponding path program 138 times [2021-06-05 21:22:53,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:53,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435015271] [2021-06-05 21:22:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:53,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:53,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435015271] [2021-06-05 21:22:53,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435015271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:53,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106888695] [2021-06-05 21:22:53,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:53,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:22:53,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:53,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:53,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:22:53,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106888695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:53,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:53,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-06-05 21:22:53,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974678384] [2021-06-05 21:22:53,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:22:53,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:53,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:22:53,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:22:53,524 INFO L87 Difference]: Start difference. First operand 3038 states and 8928 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:53,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:53,660 INFO L93 Difference]: Finished difference Result 3346 states and 9565 transitions. [2021-06-05 21:22:53,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:53,660 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:22:53,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:53,663 INFO L225 Difference]: With dead ends: 3346 [2021-06-05 21:22:53,663 INFO L226 Difference]: Without dead ends: 3339 [2021-06-05 21:22:53,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:22:53,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-06-05 21:22:53,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3038. [2021-06-05 21:22:53,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 2.939413895291406) internal successors, (8927), 3037 states have internal predecessors, (8927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:53,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 8927 transitions. [2021-06-05 21:22:53,691 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 8927 transitions. Word has length 20 [2021-06-05 21:22:53,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:53,691 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 8927 transitions. [2021-06-05 21:22:53,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:53,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 8927 transitions. [2021-06-05 21:22:53,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:22:53,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:53,693 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:53,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-05 21:22:53,894 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:53,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:53,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1876737230, now seen corresponding path program 139 times [2021-06-05 21:22:53,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:53,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430968850] [2021-06-05 21:22:53,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:53,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:53,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430968850] [2021-06-05 21:22:53,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430968850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:53,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233750095] [2021-06-05 21:22:53,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:53,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:22:53,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:54,317 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:22:54,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:54,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:22:55,808 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 298 [2021-06-05 21:22:55,931 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 298 [2021-06-05 21:22:56,124 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 303 [2021-06-05 21:22:56,344 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 389 [2021-06-05 21:22:56,474 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 302 [2021-06-05 21:22:56,585 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 293 [2021-06-05 21:22:57,807 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 244 [2021-06-05 21:22:57,935 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 252 [2021-06-05 21:22:58,137 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 294 [2021-06-05 21:22:58,316 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 294 [2021-06-05 21:22:58,540 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 297 [2021-06-05 21:22:58,674 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 234 [2021-06-05 21:22:59,589 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 150 [2021-06-05 21:22:59,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:22:59,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:59,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:22:59,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 21:22:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:59,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233750095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:59,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:59,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 21:22:59,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898257139] [2021-06-05 21:22:59,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:22:59,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:59,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:22:59,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:22:59,774 INFO L87 Difference]: Start difference. First operand 3038 states and 8927 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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 21:22:59,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:59,974 INFO L93 Difference]: Finished difference Result 3126 states and 9098 transitions. [2021-06-05 21:22:59,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:22:59,975 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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 21:22:59,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:59,977 INFO L225 Difference]: With dead ends: 3126 [2021-06-05 21:22:59,977 INFO L226 Difference]: Without dead ends: 3123 [2021-06-05 21:22:59,977 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 211.8ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:22:59,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-06-05 21:22:59,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 3077. [2021-06-05 21:23:00,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 2.935305591677503) internal successors, (9029), 3076 states have internal predecessors, (9029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 9029 transitions. [2021-06-05 21:23:00,005 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 9029 transitions. Word has length 21 [2021-06-05 21:23:00,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:00,005 INFO L482 AbstractCegarLoop]: Abstraction has 3077 states and 9029 transitions. [2021-06-05 21:23:00,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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 21:23:00,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 9029 transitions. [2021-06-05 21:23:00,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:23:00,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:00,008 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:00,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:00,208 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:00,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:00,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1748440654, now seen corresponding path program 140 times [2021-06-05 21:23:00,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:00,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336457466] [2021-06-05 21:23:00,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:23:00,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:00,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336457466] [2021-06-05 21:23:00,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336457466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:00,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549620168] [2021-06-05 21:23:00,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:00,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:23:00,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:00,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:23:00,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:00,621 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:23:00,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:00,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:23:01,213 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 245 [2021-06-05 21:23:01,317 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 245 [2021-06-05 21:23:01,448 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 255 [2021-06-05 21:23:01,580 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 268 [2021-06-05 21:23:01,869 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 340 [2021-06-05 21:23:02,908 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 284 [2021-06-05 21:23:03,088 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 304 [2021-06-05 21:23:03,314 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 323 [2021-06-05 21:23:03,552 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 323 [2021-06-05 21:23:03,810 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 332 [2021-06-05 21:23:04,287 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 351 [2021-06-05 21:23:04,472 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 214 [2021-06-05 21:23:05,087 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 268 [2021-06-05 21:23:05,590 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 264 [2021-06-05 21:23:05,738 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 264 [2021-06-05 21:23:05,910 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 269 [2021-06-05 21:23:06,050 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 277 [2021-06-05 21:23:06,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:23:06,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:06,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:23:06,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 21:23:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:06,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549620168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:06,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:06,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 21:23:06,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687992011] [2021-06-05 21:23:06,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:23:06,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:06,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:23:06,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:06,871 INFO L87 Difference]: Start difference. First operand 3077 states and 9029 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:07,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:07,068 INFO L93 Difference]: Finished difference Result 3204 states and 9307 transitions. [2021-06-05 21:23:07,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:23:07,068 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:23:07,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:07,071 INFO L225 Difference]: With dead ends: 3204 [2021-06-05 21:23:07,071 INFO L226 Difference]: Without dead ends: 3200 [2021-06-05 21:23:07,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 214.4ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:07,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3200 states. [2021-06-05 21:23:07,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3200 to 3145. [2021-06-05 21:23:07,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 3144 states have (on average 2.931933842239186) internal successors, (9218), 3144 states have internal predecessors, (9218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 9218 transitions. [2021-06-05 21:23:07,100 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 9218 transitions. Word has length 21 [2021-06-05 21:23:07,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:07,100 INFO L482 AbstractCegarLoop]: Abstraction has 3145 states and 9218 transitions. [2021-06-05 21:23:07,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 9218 transitions. [2021-06-05 21:23:07,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:23:07,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:07,102 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:07,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1003 [2021-06-05 21:23:07,303 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:07,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:07,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1114512810, now seen corresponding path program 141 times [2021-06-05 21:23:07,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:07,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68942904] [2021-06-05 21:23:07,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:23:07,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:07,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68942904] [2021-06-05 21:23:07,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68942904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:07,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220084182] [2021-06-05 21:23:07,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:07,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:23:07,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:07,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:23:07,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:07,717 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:23:07,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:07,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:23:08,414 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 230 [2021-06-05 21:23:08,521 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 243 [2021-06-05 21:23:08,742 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 320 [2021-06-05 21:23:08,926 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 293 [2021-06-05 21:23:09,030 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 243 [2021-06-05 21:23:09,912 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 217 [2021-06-05 21:23:10,635 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 355 [2021-06-05 21:23:11,870 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 244 [2021-06-05 21:23:12,269 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 793 DAG size of output: 526 [2021-06-05 21:23:12,786 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 911 DAG size of output: 620 [2021-06-05 21:23:13,376 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 1005 DAG size of output: 627 [2021-06-05 21:23:14,149 WARN L205 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 1113 DAG size of output: 731 [2021-06-05 21:23:14,890 WARN L205 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 1113 DAG size of output: 731 [2021-06-05 21:23:15,714 WARN L205 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 737 [2021-06-05 21:23:15,982 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 737 DAG size of output: 469 [2021-06-05 21:23:16,118 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 360 [2021-06-05 21:23:16,288 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 360 [2021-06-05 21:23:16,949 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 209 [2021-06-05 21:23:17,093 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 228 [2021-06-05 21:23:17,291 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 308 [2021-06-05 21:23:17,453 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 308 [2021-06-05 21:23:17,634 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 312 [2021-06-05 21:23:17,911 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 235 [2021-06-05 21:23:18,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:23:18,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:18,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:23:18,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 21:23:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:18,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220084182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:18,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:18,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 21:23:18,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287164724] [2021-06-05 21:23:18,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:23:18,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:18,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:23:18,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:18,272 INFO L87 Difference]: Start difference. First operand 3145 states and 9218 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:18,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:18,475 INFO L93 Difference]: Finished difference Result 3276 states and 9505 transitions. [2021-06-05 21:23:18,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:23:18,475 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:23:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:18,478 INFO L225 Difference]: With dead ends: 3276 [2021-06-05 21:23:18,478 INFO L226 Difference]: Without dead ends: 3272 [2021-06-05 21:23:18,478 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:18,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-06-05 21:23:18,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 3208. [2021-06-05 21:23:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 2.9307764265668848) internal successors, (9399), 3207 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:18,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 9399 transitions. [2021-06-05 21:23:18,509 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 9399 transitions. Word has length 21 [2021-06-05 21:23:18,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:18,509 INFO L482 AbstractCegarLoop]: Abstraction has 3208 states and 9399 transitions. [2021-06-05 21:23:18,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:18,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 9399 transitions. [2021-06-05 21:23:18,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:23:18,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:18,511 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:18,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1502 [2021-06-05 21:23:18,712 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:18,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:18,712 INFO L82 PathProgramCache]: Analyzing trace with hash -328243022, now seen corresponding path program 142 times [2021-06-05 21:23:18,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:18,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399995621] [2021-06-05 21:23:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:23:18,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:18,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399995621] [2021-06-05 21:23:18,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399995621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:18,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144467007] [2021-06-05 21:23:18,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:23:18,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:23:18,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:18,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:23:18,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:19,121 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:23:19,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:19,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:23:19,765 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 238 [2021-06-05 21:23:19,888 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 257 [2021-06-05 21:23:22,065 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 300 [2021-06-05 21:23:22,296 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 388 [2021-06-05 21:23:22,565 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 391 [2021-06-05 21:23:22,958 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 436 [2021-06-05 21:23:23,402 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 485 [2021-06-05 21:23:24,761 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 308 [2021-06-05 21:23:25,125 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 563 DAG size of output: 349 [2021-06-05 21:23:25,441 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 366 [2021-06-05 21:23:26,244 WARN L205 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 1245 DAG size of output: 721 [2021-06-05 21:23:27,217 WARN L205 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 1297 DAG size of output: 762 [2021-06-05 21:23:28,202 WARN L205 SmtUtils]: Spent 980.00 ms on a formula simplification. DAG size of input: 1297 DAG size of output: 762 [2021-06-05 21:23:29,254 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 1306 DAG size of output: 771 [2021-06-05 21:23:30,343 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 770 DAG size of output: 843 [2021-06-05 21:23:30,706 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 345 [2021-06-05 21:23:31,732 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 662 DAG size of output: 655 [2021-06-05 21:23:32,031 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 380 [2021-06-05 21:23:32,581 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 247 [2021-06-05 21:23:32,792 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 341 [2021-06-05 21:23:33,005 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 341 [2021-06-05 21:23:33,315 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 710 DAG size of output: 376 [2021-06-05 21:23:33,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:23:33,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:33,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:23:33,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 21:23:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:33,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144467007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:33,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:33,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 21:23:33,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213211878] [2021-06-05 21:23:33,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:23:33,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:33,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:23:33,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:33,966 INFO L87 Difference]: Start difference. First operand 3208 states and 9399 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:34,118 INFO L93 Difference]: Finished difference Result 3340 states and 9684 transitions. [2021-06-05 21:23:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:23:34,119 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:23:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:34,122 INFO L225 Difference]: With dead ends: 3340 [2021-06-05 21:23:34,122 INFO L226 Difference]: Without dead ends: 3336 [2021-06-05 21:23:34,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:34,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-05 21:23:34,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 3260. [2021-06-05 21:23:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 2.933722000613685) internal successors, (9561), 3259 states have internal predecessors, (9561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 9561 transitions. [2021-06-05 21:23:34,151 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 9561 transitions. Word has length 21 [2021-06-05 21:23:34,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:34,151 INFO L482 AbstractCegarLoop]: Abstraction has 3260 states and 9561 transitions. [2021-06-05 21:23:34,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 9561 transitions. [2021-06-05 21:23:34,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:23:34,154 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:34,154 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:34,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2416,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:34,357 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:34,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:34,357 INFO L82 PathProgramCache]: Analyzing trace with hash -2104000854, now seen corresponding path program 143 times [2021-06-05 21:23:34,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:34,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693921911] [2021-06-05 21:23:34,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:23:34,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:34,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693921911] [2021-06-05 21:23:34,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693921911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:34,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522667640] [2021-06-05 21:23:34,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:34,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:23:34,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:34,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:23:34,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:34,764 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:23:34,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:34,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:23:35,277 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 205 [2021-06-05 21:23:35,732 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 314 [2021-06-05 21:23:35,859 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 235 [2021-06-05 21:23:36,452 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 243 [2021-06-05 21:23:37,066 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 344 [2021-06-05 21:23:37,335 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 351 [2021-06-05 21:23:38,150 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 219 [2021-06-05 21:23:38,327 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 280 [2021-06-05 21:23:38,773 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 511 [2021-06-05 21:23:39,240 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 511 [2021-06-05 21:23:39,739 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 511 [2021-06-05 21:23:40,238 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 517 [2021-06-05 21:23:40,814 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 410 [2021-06-05 21:23:41,683 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 283 [2021-06-05 21:23:41,917 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 343 [2021-06-05 21:23:42,171 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 343 [2021-06-05 21:23:42,500 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 387 [2021-06-05 21:23:43,132 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 232 [2021-06-05 21:23:43,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:23:43,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:43,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:23:43,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 21:23:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:43,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522667640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:43,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:43,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 21:23:43,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459896818] [2021-06-05 21:23:43,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:23:43,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:43,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:23:43,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:43,603 INFO L87 Difference]: Start difference. First operand 3260 states and 9561 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:43,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:43,801 INFO L93 Difference]: Finished difference Result 3397 states and 9873 transitions. [2021-06-05 21:23:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:23:43,801 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:23:43,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:43,804 INFO L225 Difference]: With dead ends: 3397 [2021-06-05 21:23:43,804 INFO L226 Difference]: Without dead ends: 3392 [2021-06-05 21:23:43,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:43,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2021-06-05 21:23:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 3328. [2021-06-05 21:23:43,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3327 states have (on average 2.935076645626691) internal successors, (9765), 3327 states have internal predecessors, (9765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 9765 transitions. [2021-06-05 21:23:43,835 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 9765 transitions. Word has length 21 [2021-06-05 21:23:43,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:43,835 INFO L482 AbstractCegarLoop]: Abstraction has 3328 states and 9765 transitions. [2021-06-05 21:23:43,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:43,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 9765 transitions. [2021-06-05 21:23:43,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:23:43,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:43,838 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:44,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3337 [2021-06-05 21:23:44,038 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:44,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:44,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1317918798, now seen corresponding path program 144 times [2021-06-05 21:23:44,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:44,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398742777] [2021-06-05 21:23:44,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:23:44,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:44,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398742777] [2021-06-05 21:23:44,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398742777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:44,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851890193] [2021-06-05 21:23:44,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:44,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:23:44,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:44,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:23:44,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:44,467 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:23:44,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:44,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:23:44,968 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 222 [2021-06-05 21:23:45,152 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 235 [2021-06-05 21:23:45,262 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 242 [2021-06-05 21:23:45,864 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 248 [2021-06-05 21:23:46,665 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 304 [2021-06-05 21:23:46,913 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 304 [2021-06-05 21:23:47,171 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 348 [2021-06-05 21:23:48,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:23:48,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:48,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:23:48,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 21:23:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:48,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851890193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:48,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:48,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 21:23:48,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560517100] [2021-06-05 21:23:48,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:23:48,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:48,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:23:48,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:48,102 INFO L87 Difference]: Start difference. First operand 3328 states and 9765 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:48,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:48,350 INFO L93 Difference]: Finished difference Result 3484 states and 10127 transitions. [2021-06-05 21:23:48,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:23:48,350 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:23:48,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:48,354 INFO L225 Difference]: With dead ends: 3484 [2021-06-05 21:23:48,354 INFO L226 Difference]: Without dead ends: 3480 [2021-06-05 21:23:48,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:48,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-06-05 21:23:48,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3406. [2021-06-05 21:23:48,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 2.9392070484581496) internal successors, (10008), 3405 states have internal predecessors, (10008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:48,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 10008 transitions. [2021-06-05 21:23:48,388 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 10008 transitions. Word has length 21 [2021-06-05 21:23:48,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:48,388 INFO L482 AbstractCegarLoop]: Abstraction has 3406 states and 10008 transitions. [2021-06-05 21:23:48,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:48,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 10008 transitions. [2021-06-05 21:23:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:23:48,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:48,391 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:48,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3893,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:48,591 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:48,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:48,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1575788458, now seen corresponding path program 145 times [2021-06-05 21:23:48,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:48,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861786414] [2021-06-05 21:23:48,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:23:48,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:48,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861786414] [2021-06-05 21:23:48,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861786414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:48,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733283013] [2021-06-05 21:23:48,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:48,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:23:48,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:49,044 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:23:49,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:49,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:23:49,661 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 231 [2021-06-05 21:23:50,466 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 266 [2021-06-05 21:23:50,637 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 266 [2021-06-05 21:23:50,828 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 272 [2021-06-05 21:23:50,941 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 236 [2021-06-05 21:23:51,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:23:51,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:51,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:23:51,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 21:23:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:51,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733283013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:51,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:51,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 21:23:51,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53308124] [2021-06-05 21:23:51,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:23:51,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:51,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:23:51,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:51,535 INFO L87 Difference]: Start difference. First operand 3406 states and 10008 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:51,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:51,719 INFO L93 Difference]: Finished difference Result 3580 states and 10428 transitions. [2021-06-05 21:23:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:23:51,719 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:23:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:51,723 INFO L225 Difference]: With dead ends: 3580 [2021-06-05 21:23:51,723 INFO L226 Difference]: Without dead ends: 3576 [2021-06-05 21:23:51,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 250.4ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:51,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2021-06-05 21:23:51,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 3502. [2021-06-05 21:23:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3502 states, 3501 states have (on average 2.9460154241645244) internal successors, (10314), 3501 states have internal predecessors, (10314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:51,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3502 states to 3502 states and 10314 transitions. [2021-06-05 21:23:51,755 INFO L78 Accepts]: Start accepts. Automaton has 3502 states and 10314 transitions. Word has length 21 [2021-06-05 21:23:51,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:51,756 INFO L482 AbstractCegarLoop]: Abstraction has 3502 states and 10314 transitions. [2021-06-05 21:23:51,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:51,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3502 states and 10314 transitions. [2021-06-05 21:23:51,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:23:51,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:51,758 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:51,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4195 [2021-06-05 21:23:51,959 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:51,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:51,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1086400178, now seen corresponding path program 146 times [2021-06-05 21:23:51,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:51,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506006580] [2021-06-05 21:23:51,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:23:52,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:52,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506006580] [2021-06-05 21:23:52,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506006580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:52,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618456445] [2021-06-05 21:23:52,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:52,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:23:52,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:52,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:23:52,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:52,435 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:23:52,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:52,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:23:53,730 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 235 [2021-06-05 21:23:54,535 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 328 [2021-06-05 21:23:54,743 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 328 [2021-06-05 21:23:54,967 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 334 [2021-06-05 21:23:55,126 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 378 [2021-06-05 21:23:55,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:23:55,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:55,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:23:55,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 21:23:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:55,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618456445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:55,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:55,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 21:23:55,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239577232] [2021-06-05 21:23:55,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:23:55,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:55,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:23:55,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:55,885 INFO L87 Difference]: Start difference. First operand 3502 states and 10314 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:56,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:56,173 INFO L93 Difference]: Finished difference Result 3937 states and 11542 transitions. [2021-06-05 21:23:56,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:23:56,173 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:23:56,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:56,177 INFO L225 Difference]: With dead ends: 3937 [2021-06-05 21:23:56,177 INFO L226 Difference]: Without dead ends: 3934 [2021-06-05 21:23:56,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 246.0ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:23:56,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3934 states. [2021-06-05 21:23:56,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3934 to 3870. [2021-06-05 21:23:56,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 2.9581287154303437) internal successors, (11445), 3869 states have internal predecessors, (11445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 11445 transitions. [2021-06-05 21:23:56,214 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 11445 transitions. Word has length 21 [2021-06-05 21:23:56,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:56,214 INFO L482 AbstractCegarLoop]: Abstraction has 3870 states and 11445 transitions. [2021-06-05 21:23:56,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:56,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 11445 transitions. [2021-06-05 21:23:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:23:56,217 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:56,217 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:56,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4581,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:56,417 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:56,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:56,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1199734614, now seen corresponding path program 147 times [2021-06-05 21:23:56,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:56,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341440032] [2021-06-05 21:23:56,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:23:56,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:56,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341440032] [2021-06-05 21:23:56,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341440032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:56,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460707317] [2021-06-05 21:23:56,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:56,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:23:56,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:56,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:23:56,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:56,839 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:23:56,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:56,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:23:57,505 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 284 [2021-06-05 21:23:57,643 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 295 [2021-06-05 21:23:57,799 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 295 [2021-06-05 21:23:57,967 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 308 [2021-06-05 21:23:58,240 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 371 [2021-06-05 21:23:58,381 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 286 [2021-06-05 21:23:58,580 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 343 [2021-06-05 21:23:58,720 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 296 [2021-06-05 21:23:59,926 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 300 [2021-06-05 21:24:01,947 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 236 [2021-06-05 21:24:02,150 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 342 [2021-06-05 21:24:02,538 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 494 [2021-06-05 21:24:03,148 WARN L205 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 863 DAG size of output: 728 [2021-06-05 21:24:03,307 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 338 [2021-06-05 21:24:03,425 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 297 [2021-06-05 21:24:03,565 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 347 [2021-06-05 21:24:04,242 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 309 [2021-06-05 21:24:04,761 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 290 [2021-06-05 21:24:05,406 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 249 [2021-06-05 21:24:05,676 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 449 [2021-06-05 21:24:06,115 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 695 DAG size of output: 568 [2021-06-05 21:24:06,926 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 263 [2021-06-05 21:24:07,660 WARN L205 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 944 DAG size of output: 763 [2021-06-05 21:24:07,833 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 273 [2021-06-05 21:24:09,160 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 274 [2021-06-05 21:24:09,416 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 376 [2021-06-05 21:24:10,176 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 495 [2021-06-05 21:24:11,447 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 1457 DAG size of output: 1160 [2021-06-05 21:24:13,603 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 2117 DAG size of output: 1722 [2021-06-05 21:24:16,042 WARN L205 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 2126 DAG size of output: 1700 [2021-06-05 21:24:18,642 WARN L205 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 2297 DAG size of output: 1855 [2021-06-05 21:24:21,616 WARN L205 SmtUtils]: Spent 2.97 s on a formula simplification. DAG size of input: 2314 DAG size of output: 1868 [2021-06-05 21:24:25,121 WARN L205 SmtUtils]: Spent 3.49 s on a formula simplification. DAG size of input: 2404 DAG size of output: 1926 [2021-06-05 21:24:28,843 WARN L205 SmtUtils]: Spent 3.71 s on a formula simplification. DAG size of input: 2404 DAG size of output: 1926 [2021-06-05 21:24:33,544 WARN L205 SmtUtils]: Spent 4.69 s on a formula simplification. DAG size of input: 2413 DAG size of output: 1935 [2021-06-05 21:24:38,321 WARN L205 SmtUtils]: Spent 4.77 s on a formula simplification. DAG size of input: 1937 DAG size of output: 1926 [2021-06-05 21:24:38,482 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 1913 [2021-06-05 21:24:38,680 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 292 [2021-06-05 21:24:38,821 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 247 [2021-06-05 21:24:38,929 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 272 [2021-06-05 21:24:40,262 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 224 [2021-06-05 21:24:41,470 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 271 [2021-06-05 21:24:41,731 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 707 DAG size of output: 324 [2021-06-05 21:24:42,449 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 898 DAG size of output: 474 [2021-06-05 21:24:44,910 WARN L205 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 1831 DAG size of output: 1691 [2021-06-05 21:24:46,311 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 1672 DAG size of output: 1637 [2021-06-05 21:24:46,510 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 1484 DAG size of output: 1484 [2021-06-05 21:24:47,592 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 428 [2021-06-05 21:24:47,963 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 471 [2021-06-05 21:24:48,849 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 322 [2021-06-05 21:24:48,980 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 322 [2021-06-05 21:24:49,270 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 935 [2021-06-05 21:24:50,088 WARN L205 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 562 [2021-06-05 21:24:50,872 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 325 [2021-06-05 21:24:50,996 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 216 [2021-06-05 21:24:51,469 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 302 [2021-06-05 21:24:51,627 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 302 [2021-06-05 21:24:51,778 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 299 [2021-06-05 21:24:51,887 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 177 [2021-06-05 21:24:52,795 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 892 DAG size of output: 457 [2021-06-05 21:24:53,271 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 1452 DAG size of output: 748 [2021-06-05 21:24:53,487 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 269 [2021-06-05 21:24:54,017 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 225 [2021-06-05 21:24:54,157 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 238 [2021-06-05 21:24:54,813 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 265 [2021-06-05 21:24:54,988 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 489 DAG size of output: 297 [2021-06-05 21:24:55,800 WARN L205 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 1854 DAG size of output: 987 [2021-06-05 21:24:56,970 WARN L205 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 1941 DAG size of output: 1041 [2021-06-05 21:24:58,556 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 2661 DAG size of output: 1346 [2021-06-05 21:25:00,344 WARN L205 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 2691 DAG size of output: 1375 [2021-06-05 21:25:02,141 WARN L205 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 2691 DAG size of output: 1375 [2021-06-05 21:25:04,335 WARN L205 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 2695 DAG size of output: 1379 [2021-06-05 21:25:06,531 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 1381 DAG size of output: 1259 [2021-06-05 21:25:07,711 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 913 DAG size of output: 759 [2021-06-05 21:25:08,528 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 234 [2021-06-05 21:25:08,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:25:08,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:25:08,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:25:08,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 21:25:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:08,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460707317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:08,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:08,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 21:25:08,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246441015] [2021-06-05 21:25:08,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:25:08,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:08,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:25:08,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:25:08,916 INFO L87 Difference]: Start difference. First operand 3870 states and 11445 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:09,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:09,157 INFO L93 Difference]: Finished difference Result 4316 states and 12694 transitions. [2021-06-05 21:25:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:25:09,157 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:25:09,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:09,162 INFO L225 Difference]: With dead ends: 4316 [2021-06-05 21:25:09,162 INFO L226 Difference]: Without dead ends: 4313 [2021-06-05 21:25:09,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:25:09,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2021-06-05 21:25:09,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 4248. [2021-06-05 21:25:09,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4248 states, 4247 states have (on average 2.9684483164586766) internal successors, (12607), 4247 states have internal predecessors, (12607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 12607 transitions. [2021-06-05 21:25:09,206 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 12607 transitions. Word has length 21 [2021-06-05 21:25:09,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:09,206 INFO L482 AbstractCegarLoop]: Abstraction has 4248 states and 12607 transitions. [2021-06-05 21:25:09,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:09,206 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 12607 transitions. [2021-06-05 21:25:09,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:25:09,209 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:09,209 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:09,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5056 [2021-06-05 21:25:09,410 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:09,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:09,410 INFO L82 PathProgramCache]: Analyzing trace with hash 944530866, now seen corresponding path program 148 times [2021-06-05 21:25:09,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:09,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212095872] [2021-06-05 21:25:09,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:25:09,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:09,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212095872] [2021-06-05 21:25:09,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212095872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:09,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230120793] [2021-06-05 21:25:09,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:09,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:09,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:09,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:25:09,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:09,853 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 21:25:09,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:25:09,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 21:25:10,634 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 261 [2021-06-05 21:25:11,439 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 304 [2021-06-05 21:25:11,597 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 325 [2021-06-05 21:25:11,874 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 466 [2021-06-05 21:25:12,173 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 466 [2021-06-05 21:25:12,548 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 660 DAG size of output: 479 [2021-06-05 21:25:13,038 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 581 [2021-06-05 21:25:13,799 WARN L205 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 648 [2021-06-05 21:25:14,208 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 467 [2021-06-05 21:25:14,487 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 303 [2021-06-05 21:25:15,139 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 257 [2021-06-05 21:25:15,327 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 329 [2021-06-05 21:25:16,437 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 173 [2021-06-05 21:25:16,814 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 208 [2021-06-05 21:25:16,960 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 269 [2021-06-05 21:25:17,330 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 464 [2021-06-05 21:25:17,994 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 701 DAG size of output: 644 [2021-06-05 21:25:18,493 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 547 [2021-06-05 21:25:19,625 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 231 [2021-06-05 21:25:19,808 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 232 [2021-06-05 21:25:20,376 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 275 [2021-06-05 21:25:20,579 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 190 [2021-06-05 21:25:20,928 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 234 [2021-06-05 21:25:21,270 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 262 [2021-06-05 21:25:21,609 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 348 [2021-06-05 21:25:22,490 WARN L205 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 832 DAG size of output: 571 [2021-06-05 21:25:23,981 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 194 [2021-06-05 21:25:24,237 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 357 [2021-06-05 21:25:25,322 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 1093 DAG size of output: 799 [2021-06-05 21:25:26,904 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 1557 DAG size of output: 1132 [2021-06-05 21:25:27,255 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 453 [2021-06-05 21:25:27,875 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 540 [2021-06-05 21:25:28,465 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 200 [2021-06-05 21:25:28,590 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 216 [2021-06-05 21:25:29,807 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 217 [2021-06-05 21:25:29,955 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 298 [2021-06-05 21:25:30,206 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 390 [2021-06-05 21:25:31,140 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 598 [2021-06-05 21:25:31,867 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 243 [2021-06-05 21:25:32,045 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 265 [2021-06-05 21:25:32,222 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 288 [2021-06-05 21:25:32,596 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 233 [2021-06-05 21:25:33,120 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 272 [2021-06-05 21:25:33,230 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 275 [2021-06-05 21:25:33,423 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 350 [2021-06-05 21:25:33,719 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 447 [2021-06-05 21:25:33,920 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 240 [2021-06-05 21:25:34,447 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 271 [2021-06-05 21:25:34,926 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 727 DAG size of output: 614 [2021-06-05 21:25:35,667 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 238 [2021-06-05 21:25:36,550 WARN L205 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 1122 DAG size of output: 910 [2021-06-05 21:25:38,316 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 1515 DAG size of output: 1270 [2021-06-05 21:25:40,356 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 1698 DAG size of output: 1431 [2021-06-05 21:25:44,471 WARN L205 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 2765 DAG size of output: 2211 [2021-06-05 21:25:48,508 WARN L205 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 2765 DAG size of output: 2211 [2021-06-05 21:25:52,870 WARN L205 SmtUtils]: Spent 4.35 s on a formula simplification. DAG size of input: 2771 DAG size of output: 2217 [2021-06-05 21:25:53,614 WARN L205 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 2217 DAG size of output: 1860 [2021-06-05 21:25:56,130 WARN L205 SmtUtils]: Spent 2.51 s on a formula simplification. DAG size of input: 1349 DAG size of output: 1709 [2021-06-05 21:25:56,375 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 424 [2021-06-05 21:25:56,557 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 280 [2021-06-05 21:25:56,970 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 258 [2021-06-05 21:25:57,398 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 251 [2021-06-05 21:25:57,583 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 263 [2021-06-05 21:25:57,992 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 1145 DAG size of output: 624 [2021-06-05 21:25:58,872 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 580 [2021-06-05 21:25:59,344 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 253 [2021-06-05 21:25:59,778 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 289 [2021-06-05 21:25:59,970 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 371 [2021-06-05 21:26:00,276 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 762 DAG size of output: 476 [2021-06-05 21:26:00,735 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 1117 DAG size of output: 562 [2021-06-05 21:26:01,152 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 491 [2021-06-05 21:26:01,296 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 313 [2021-06-05 21:26:02,403 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 304 [2021-06-05 21:26:02,746 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 461 [2021-06-05 21:26:02,911 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 329 [2021-06-05 21:26:03,867 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 511 DAG size of output: 310 [2021-06-05 21:26:04,219 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 944 DAG size of output: 496 [2021-06-05 21:26:05,150 WARN L205 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 1840 DAG size of output: 923 [2021-06-05 21:26:06,126 WARN L205 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 1840 DAG size of output: 923 [2021-06-05 21:26:07,159 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 1845 DAG size of output: 928 [2021-06-05 21:26:08,273 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 930 DAG size of output: 1088 [2021-06-05 21:26:08,587 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 261 [2021-06-05 21:26:09,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:26:09,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:26:09,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:26:09,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 21:26:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:09,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230120793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:09,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:09,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 21:26:09,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359700276] [2021-06-05 21:26:09,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:26:09,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:09,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:26:09,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:26:09,606 INFO L87 Difference]: Start difference. First operand 4248 states and 12607 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:09,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:09,854 INFO L93 Difference]: Finished difference Result 4620 states and 13625 transitions. [2021-06-05 21:26:09,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:26:09,854 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:26:09,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:09,859 INFO L225 Difference]: With dead ends: 4620 [2021-06-05 21:26:09,859 INFO L226 Difference]: Without dead ends: 4617 [2021-06-05 21:26:09,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 247.2ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:26:09,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2021-06-05 21:26:09,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 4548. [2021-06-05 21:26:09,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4548 states, 4547 states have (on average 2.9762480756542775) internal successors, (13533), 4547 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:09,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 13533 transitions. [2021-06-05 21:26:09,907 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 13533 transitions. Word has length 21 [2021-06-05 21:26:09,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:09,907 INFO L482 AbstractCegarLoop]: Abstraction has 4548 states and 13533 transitions. [2021-06-05 21:26:09,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:09,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 13533 transitions. [2021-06-05 21:26:09,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:09,911 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:09,911 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:10,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7776 [2021-06-05 21:26:10,111 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:10,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:10,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1973759689, now seen corresponding path program 149 times [2021-06-05 21:26:10,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:10,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833074496] [2021-06-05 21:26:10,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:10,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:10,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833074496] [2021-06-05 21:26:10,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833074496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:10,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418036366] [2021-06-05 21:26:10,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:10,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:26:10,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:10,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:10,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:10,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418036366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:10,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:10,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:26:10,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762879029] [2021-06-05 21:26:10,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:26:10,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:10,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:26:10,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:26:10,272 INFO L87 Difference]: Start difference. First operand 4548 states and 13533 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:10,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:10,554 INFO L93 Difference]: Finished difference Result 4872 states and 14053 transitions. [2021-06-05 21:26:10,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:26:10,554 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:10,558 INFO L225 Difference]: With dead ends: 4872 [2021-06-05 21:26:10,558 INFO L226 Difference]: Without dead ends: 4863 [2021-06-05 21:26:10,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 238.6ms TimeCoverageRelationStatistics Valid=423, Invalid=837, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:26:10,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2021-06-05 21:26:10,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 4581. [2021-06-05 21:26:10,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 2.9753275109170305) internal successors, (13627), 4580 states have internal predecessors, (13627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 13627 transitions. [2021-06-05 21:26:10,609 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 13627 transitions. Word has length 22 [2021-06-05 21:26:10,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:10,610 INFO L482 AbstractCegarLoop]: Abstraction has 4581 states and 13627 transitions. [2021-06-05 21:26:10,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:10,610 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 13627 transitions. [2021-06-05 21:26:10,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:10,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:10,613 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:10,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9859,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:10,814 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:10,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:10,814 INFO L82 PathProgramCache]: Analyzing trace with hash 510781845, now seen corresponding path program 150 times [2021-06-05 21:26:10,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:10,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146321964] [2021-06-05 21:26:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:10,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:10,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146321964] [2021-06-05 21:26:10,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146321964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:10,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698455513] [2021-06-05 21:26:10,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:10,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:26:10,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:10,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:10,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:10,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698455513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:10,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:10,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:10,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480553224] [2021-06-05 21:26:10,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:10,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:10,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:10,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:10,963 INFO L87 Difference]: Start difference. First operand 4581 states and 13627 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:11,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:11,049 INFO L93 Difference]: Finished difference Result 5002 states and 14452 transitions. [2021-06-05 21:26:11,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:26:11,050 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:11,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:11,054 INFO L225 Difference]: With dead ends: 5002 [2021-06-05 21:26:11,054 INFO L226 Difference]: Without dead ends: 5002 [2021-06-05 21:26:11,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:11,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5002 states. [2021-06-05 21:26:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5002 to 4539. [2021-06-05 21:26:11,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 2.9726751873071837) internal successors, (13490), 4538 states have internal predecessors, (13490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:11,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 13490 transitions. [2021-06-05 21:26:11,103 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 13490 transitions. Word has length 22 [2021-06-05 21:26:11,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:11,103 INFO L482 AbstractCegarLoop]: Abstraction has 4539 states and 13490 transitions. [2021-06-05 21:26:11,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:11,103 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 13490 transitions. [2021-06-05 21:26:11,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:11,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:11,107 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:11,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9860 [2021-06-05 21:26:11,307 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:11,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:11,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1655986249, now seen corresponding path program 151 times [2021-06-05 21:26:11,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:11,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278060687] [2021-06-05 21:26:11,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:11,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:11,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278060687] [2021-06-05 21:26:11,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278060687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:11,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984693905] [2021-06-05 21:26:11,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:11,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:11,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:11,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984693905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:11,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:11,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:11,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068948608] [2021-06-05 21:26:11,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:11,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:11,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:11,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:11,431 INFO L87 Difference]: Start difference. First operand 4539 states and 13490 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:11,581 INFO L93 Difference]: Finished difference Result 4827 states and 13939 transitions. [2021-06-05 21:26:11,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:26:11,581 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:11,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:11,585 INFO L225 Difference]: With dead ends: 4827 [2021-06-05 21:26:11,585 INFO L226 Difference]: Without dead ends: 4825 [2021-06-05 21:26:11,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=209, Invalid=343, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:26:11,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4825 states. [2021-06-05 21:26:11,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4825 to 4570. [2021-06-05 21:26:11,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4569 states have (on average 2.9739549135478223) internal successors, (13588), 4569 states have internal predecessors, (13588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:11,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 13588 transitions. [2021-06-05 21:26:11,632 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 13588 transitions. Word has length 22 [2021-06-05 21:26:11,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:11,632 INFO L482 AbstractCegarLoop]: Abstraction has 4570 states and 13588 transitions. [2021-06-05 21:26:11,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:11,632 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 13588 transitions. [2021-06-05 21:26:11,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:11,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:11,635 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:11,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9861,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:11,836 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:11,836 INFO L82 PathProgramCache]: Analyzing trace with hash -921231987, now seen corresponding path program 152 times [2021-06-05 21:26:11,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:11,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241574178] [2021-06-05 21:26:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:11,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:11,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241574178] [2021-06-05 21:26:11,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241574178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:11,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863119329] [2021-06-05 21:26:11,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:11,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:11,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:11,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:11,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:11,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863119329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:11,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:11,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:11,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964599601] [2021-06-05 21:26:11,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:11,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:11,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:11,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:11,968 INFO L87 Difference]: Start difference. First operand 4570 states and 13588 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:12,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:12,034 INFO L93 Difference]: Finished difference Result 5088 states and 14673 transitions. [2021-06-05 21:26:12,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:26:12,035 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:12,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:12,039 INFO L225 Difference]: With dead ends: 5088 [2021-06-05 21:26:12,039 INFO L226 Difference]: Without dead ends: 5088 [2021-06-05 21:26:12,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:12,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2021-06-05 21:26:12,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 4572. [2021-06-05 21:26:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4571 states have (on average 2.9739663093415007) internal successors, (13594), 4571 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 21:26:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 13594 transitions. [2021-06-05 21:26:12,107 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 13594 transitions. Word has length 22 [2021-06-05 21:26:12,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:12,107 INFO L482 AbstractCegarLoop]: Abstraction has 4572 states and 13594 transitions. [2021-06-05 21:26:12,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 13594 transitions. [2021-06-05 21:26:12,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:12,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:12,111 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:12,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9862 [2021-06-05 21:26:12,311 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:12,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:12,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1644687975, now seen corresponding path program 153 times [2021-06-05 21:26:12,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:12,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796605410] [2021-06-05 21:26:12,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:12,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:12,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796605410] [2021-06-05 21:26:12,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796605410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:12,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247135979] [2021-06-05 21:26:12,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:12,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:26:12,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:12,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:12,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:12,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247135979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:12,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:12,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:26:12,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131037383] [2021-06-05 21:26:12,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:12,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:12,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:12,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:12,460 INFO L87 Difference]: Start difference. First operand 4572 states and 13594 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:12,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:12,546 INFO L93 Difference]: Finished difference Result 5431 states and 15640 transitions. [2021-06-05 21:26:12,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:26:12,547 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:12,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:12,551 INFO L225 Difference]: With dead ends: 5431 [2021-06-05 21:26:12,551 INFO L226 Difference]: Without dead ends: 5431 [2021-06-05 21:26:12,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:26:12,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2021-06-05 21:26:12,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 4529. [2021-06-05 21:26:12,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4529 states, 4528 states have (on average 2.9712897526501765) internal successors, (13454), 4528 states have internal predecessors, (13454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4529 states to 4529 states and 13454 transitions. [2021-06-05 21:26:12,599 INFO L78 Accepts]: Start accepts. Automaton has 4529 states and 13454 transitions. Word has length 22 [2021-06-05 21:26:12,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:12,599 INFO L482 AbstractCegarLoop]: Abstraction has 4529 states and 13454 transitions. [2021-06-05 21:26:12,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:12,599 INFO L276 IsEmpty]: Start isEmpty. Operand 4529 states and 13454 transitions. [2021-06-05 21:26:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:12,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:12,603 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:12,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9863 [2021-06-05 21:26:12,803 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:12,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:12,803 INFO L82 PathProgramCache]: Analyzing trace with hash 213230417, now seen corresponding path program 154 times [2021-06-05 21:26:12,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:12,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679178369] [2021-06-05 21:26:12,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:12,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:12,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679178369] [2021-06-05 21:26:12,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679178369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:12,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059630015] [2021-06-05 21:26:12,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:12,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:12,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:12,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:12,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:12,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059630015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:12,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:12,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:12,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205858170] [2021-06-05 21:26:12,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:12,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:12,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:12,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:12,930 INFO L87 Difference]: Start difference. First operand 4529 states and 13454 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:13,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:13,079 INFO L93 Difference]: Finished difference Result 4816 states and 13905 transitions. [2021-06-05 21:26:13,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:26:13,079 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:13,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:13,083 INFO L225 Difference]: With dead ends: 4816 [2021-06-05 21:26:13,083 INFO L226 Difference]: Without dead ends: 4814 [2021-06-05 21:26:13,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=208, Invalid=344, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:26:13,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2021-06-05 21:26:13,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 4562. [2021-06-05 21:26:13,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4562 states, 4561 states have (on average 2.9723744792808593) internal successors, (13557), 4561 states have internal predecessors, (13557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:13,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4562 states to 4562 states and 13557 transitions. [2021-06-05 21:26:13,132 INFO L78 Accepts]: Start accepts. Automaton has 4562 states and 13557 transitions. Word has length 22 [2021-06-05 21:26:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:13,132 INFO L482 AbstractCegarLoop]: Abstraction has 4562 states and 13557 transitions. [2021-06-05 21:26:13,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 4562 states and 13557 transitions. [2021-06-05 21:26:13,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:13,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:13,136 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:13,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9864,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:13,336 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:13,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:13,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1930979477, now seen corresponding path program 155 times [2021-06-05 21:26:13,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:13,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103029409] [2021-06-05 21:26:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:13,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:13,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103029409] [2021-06-05 21:26:13,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103029409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:13,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409721009] [2021-06-05 21:26:13,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:13,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:26:13,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:13,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:13,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:13,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409721009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:13,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:13,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:13,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526087979] [2021-06-05 21:26:13,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:13,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:13,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:13,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:13,466 INFO L87 Difference]: Start difference. First operand 4562 states and 13557 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:13,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:13,533 INFO L93 Difference]: Finished difference Result 5117 states and 14760 transitions. [2021-06-05 21:26:13,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:26:13,533 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:13,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:13,537 INFO L225 Difference]: With dead ends: 5117 [2021-06-05 21:26:13,537 INFO L226 Difference]: Without dead ends: 5117 [2021-06-05 21:26:13,538 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:13,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-06-05 21:26:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4563. [2021-06-05 21:26:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.9723805348531345) internal successors, (13560), 4562 states have internal predecessors, (13560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:13,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 13560 transitions. [2021-06-05 21:26:13,585 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 13560 transitions. Word has length 22 [2021-06-05 21:26:13,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:13,585 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 13560 transitions. [2021-06-05 21:26:13,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:13,586 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 13560 transitions. [2021-06-05 21:26:13,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:13,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:13,589 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:13,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9865 [2021-06-05 21:26:13,789 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:13,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:13,790 INFO L82 PathProgramCache]: Analyzing trace with hash 201932143, now seen corresponding path program 156 times [2021-06-05 21:26:13,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:13,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514214941] [2021-06-05 21:26:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:13,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:13,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514214941] [2021-06-05 21:26:13,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514214941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:13,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114074051] [2021-06-05 21:26:13,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:13,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:26:13,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:13,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:13,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:13,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114074051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:13,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:13,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:26:13,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645483959] [2021-06-05 21:26:13,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:13,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:13,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:13,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:13,924 INFO L87 Difference]: Start difference. First operand 4563 states and 13560 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:14,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:14,020 INFO L93 Difference]: Finished difference Result 5624 states and 16198 transitions. [2021-06-05 21:26:14,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:26:14,020 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:14,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:14,024 INFO L225 Difference]: With dead ends: 5624 [2021-06-05 21:26:14,024 INFO L226 Difference]: Without dead ends: 5624 [2021-06-05 21:26:14,025 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:26:14,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5624 states. [2021-06-05 21:26:14,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5624 to 4520. [2021-06-05 21:26:14,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4520 states, 4519 states have (on average 2.969240982518256) internal successors, (13418), 4519 states have internal predecessors, (13418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 13418 transitions. [2021-06-05 21:26:14,076 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 13418 transitions. Word has length 22 [2021-06-05 21:26:14,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:14,076 INFO L482 AbstractCegarLoop]: Abstraction has 4520 states and 13418 transitions. [2021-06-05 21:26:14,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:14,077 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 13418 transitions. [2021-06-05 21:26:14,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:14,080 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:14,080 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:14,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9866,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:14,280 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:14,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:14,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1858927659, now seen corresponding path program 157 times [2021-06-05 21:26:14,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:14,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345072686] [2021-06-05 21:26:14,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:14,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:14,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345072686] [2021-06-05 21:26:14,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345072686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:14,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115671588] [2021-06-05 21:26:14,347 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:14,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:14,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:14,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115671588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:14,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:14,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:26:14,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049643925] [2021-06-05 21:26:14,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:14,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:14,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:14,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:14,424 INFO L87 Difference]: Start difference. First operand 4520 states and 13418 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:14,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:14,551 INFO L93 Difference]: Finished difference Result 7402 states and 21575 transitions. [2021-06-05 21:26:14,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:26:14,552 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:14,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:14,558 INFO L225 Difference]: With dead ends: 7402 [2021-06-05 21:26:14,558 INFO L226 Difference]: Without dead ends: 7402 [2021-06-05 21:26:14,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:26:14,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7402 states. [2021-06-05 21:26:14,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7402 to 6132. [2021-06-05 21:26:14,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6132 states, 6131 states have (on average 2.9955961507095092) internal successors, (18366), 6131 states have internal predecessors, (18366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 18366 transitions. [2021-06-05 21:26:14,636 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 18366 transitions. Word has length 22 [2021-06-05 21:26:14,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:14,636 INFO L482 AbstractCegarLoop]: Abstraction has 6132 states and 18366 transitions. [2021-06-05 21:26:14,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:14,636 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 18366 transitions. [2021-06-05 21:26:14,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:14,642 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:14,642 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:14,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9867 [2021-06-05 21:26:14,842 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:14,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:14,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1562527415, now seen corresponding path program 158 times [2021-06-05 21:26:14,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:14,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056300888] [2021-06-05 21:26:14,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:14,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:14,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:14,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056300888] [2021-06-05 21:26:14,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056300888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:14,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220314622] [2021-06-05 21:26:14,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:14,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:14,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:14,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:14,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:14,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220314622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:14,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:14,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:14,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701305225] [2021-06-05 21:26:14,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:14,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:14,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:14,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:14,976 INFO L87 Difference]: Start difference. First operand 6132 states and 18366 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:15,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:15,139 INFO L93 Difference]: Finished difference Result 6467 states and 18987 transitions. [2021-06-05 21:26:15,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:26:15,139 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:15,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:15,145 INFO L225 Difference]: With dead ends: 6467 [2021-06-05 21:26:15,145 INFO L226 Difference]: Without dead ends: 6465 [2021-06-05 21:26:15,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=207, Invalid=345, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:26:15,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6465 states. [2021-06-05 21:26:15,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6465 to 6222. [2021-06-05 21:26:15,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 2.9975888120880887) internal successors, (18648), 6221 states have internal predecessors, (18648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 18648 transitions. [2021-06-05 21:26:15,212 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 18648 transitions. Word has length 22 [2021-06-05 21:26:15,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:15,212 INFO L482 AbstractCegarLoop]: Abstraction has 6222 states and 18648 transitions. [2021-06-05 21:26:15,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:15,212 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 18648 transitions. [2021-06-05 21:26:15,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:15,217 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:15,217 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:15,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9868,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:15,417 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:15,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:15,417 INFO L82 PathProgramCache]: Analyzing trace with hash 155221645, now seen corresponding path program 159 times [2021-06-05 21:26:15,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:15,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441051283] [2021-06-05 21:26:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:15,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:15,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441051283] [2021-06-05 21:26:15,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441051283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:15,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682555797] [2021-06-05 21:26:15,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:15,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:26:15,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:15,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:15,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:15,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682555797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:15,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:15,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:15,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452688284] [2021-06-05 21:26:15,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:15,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:15,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:15,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:15,576 INFO L87 Difference]: Start difference. First operand 6222 states and 18648 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:15,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:15,643 INFO L93 Difference]: Finished difference Result 6454 states and 18938 transitions. [2021-06-05 21:26:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:26:15,643 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:15,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:15,649 INFO L225 Difference]: With dead ends: 6454 [2021-06-05 21:26:15,649 INFO L226 Difference]: Without dead ends: 6454 [2021-06-05 21:26:15,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:15,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2021-06-05 21:26:15,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 6210. [2021-06-05 21:26:15,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6210 states, 6209 states have (on average 2.995490417136415) internal successors, (18599), 6209 states have internal predecessors, (18599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6210 states to 6210 states and 18599 transitions. [2021-06-05 21:26:15,716 INFO L78 Accepts]: Start accepts. Automaton has 6210 states and 18599 transitions. Word has length 22 [2021-06-05 21:26:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:15,716 INFO L482 AbstractCegarLoop]: Abstraction has 6210 states and 18599 transitions. [2021-06-05 21:26:15,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 6210 states and 18599 transitions. [2021-06-05 21:26:15,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:15,721 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:15,721 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:15,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9869,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:15,921 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:15,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:15,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1573825689, now seen corresponding path program 160 times [2021-06-05 21:26:15,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:15,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140065076] [2021-06-05 21:26:15,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:15,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:15,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140065076] [2021-06-05 21:26:15,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140065076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:15,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077453637] [2021-06-05 21:26:15,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:16,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:16,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:16,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:16,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:16,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077453637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:16,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:16,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:26:16,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482285894] [2021-06-05 21:26:16,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:16,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:16,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:16,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:16,073 INFO L87 Difference]: Start difference. First operand 6210 states and 18599 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:16,161 INFO L93 Difference]: Finished difference Result 7159 states and 20967 transitions. [2021-06-05 21:26:16,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:26:16,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:16,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:16,167 INFO L225 Difference]: With dead ends: 7159 [2021-06-05 21:26:16,167 INFO L226 Difference]: Without dead ends: 7159 [2021-06-05 21:26:16,167 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:26:16,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7159 states. [2021-06-05 21:26:16,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7159 to 6221. [2021-06-05 21:26:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6221 states, 6220 states have (on average 2.995498392282958) internal successors, (18632), 6220 states have internal predecessors, (18632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:16,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6221 states to 6221 states and 18632 transitions. [2021-06-05 21:26:16,236 INFO L78 Accepts]: Start accepts. Automaton has 6221 states and 18632 transitions. Word has length 22 [2021-06-05 21:26:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:16,236 INFO L482 AbstractCegarLoop]: Abstraction has 6221 states and 18632 transitions. [2021-06-05 21:26:16,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:16,236 INFO L276 IsEmpty]: Start isEmpty. Operand 6221 states and 18632 transitions. [2021-06-05 21:26:16,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:16,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:16,240 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:16,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9870,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:16,444 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:16,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash 660281805, now seen corresponding path program 161 times [2021-06-05 21:26:16,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:16,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910862686] [2021-06-05 21:26:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:16,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:16,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910862686] [2021-06-05 21:26:16,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910862686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:16,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118523406] [2021-06-05 21:26:16,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:16,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:26:16,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:16,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:16,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:16,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118523406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:16,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:16,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:26:16,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935247703] [2021-06-05 21:26:16,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:16,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:16,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:16,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:16,575 INFO L87 Difference]: Start difference. First operand 6221 states and 18632 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:16,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:16,678 INFO L93 Difference]: Finished difference Result 10072 states and 29921 transitions. [2021-06-05 21:26:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:26:16,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:16,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:16,688 INFO L225 Difference]: With dead ends: 10072 [2021-06-05 21:26:16,688 INFO L226 Difference]: Without dead ends: 10072 [2021-06-05 21:26:16,688 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:26:16,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10072 states. [2021-06-05 21:26:16,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10072 to 9194. [2021-06-05 21:26:16,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9194 states, 9193 states have (on average 3.024583922549766) internal successors, (27805), 9193 states have internal predecessors, (27805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:16,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9194 states to 9194 states and 27805 transitions. [2021-06-05 21:26:16,793 INFO L78 Accepts]: Start accepts. Automaton has 9194 states and 27805 transitions. Word has length 22 [2021-06-05 21:26:16,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:16,794 INFO L482 AbstractCegarLoop]: Abstraction has 9194 states and 27805 transitions. [2021-06-05 21:26:16,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:16,794 INFO L276 IsEmpty]: Start isEmpty. Operand 9194 states and 27805 transitions. [2021-06-05 21:26:16,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:16,800 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:16,800 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:17,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9871,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:17,000 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:17,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1198137383, now seen corresponding path program 162 times [2021-06-05 21:26:17,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:17,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424055403] [2021-06-05 21:26:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:17,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:17,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424055403] [2021-06-05 21:26:17,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424055403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:17,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780396669] [2021-06-05 21:26:17,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:17,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:26:17,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:17,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:17,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:17,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780396669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:17,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:17,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:26:17,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344927851] [2021-06-05 21:26:17,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:17,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:17,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:17,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:17,140 INFO L87 Difference]: Start difference. First operand 9194 states and 27805 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:17,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:17,303 INFO L93 Difference]: Finished difference Result 13143 states and 39385 transitions. [2021-06-05 21:26:17,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:26:17,303 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:17,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:17,320 INFO L225 Difference]: With dead ends: 13143 [2021-06-05 21:26:17,320 INFO L226 Difference]: Without dead ends: 13143 [2021-06-05 21:26:17,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:17,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13143 states. [2021-06-05 21:26:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13143 to 11491. [2021-06-05 21:26:17,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11491 states, 11490 states have (on average 3.0464751958224543) internal successors, (35004), 11490 states have internal predecessors, (35004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:17,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11491 states to 11491 states and 35004 transitions. [2021-06-05 21:26:17,489 INFO L78 Accepts]: Start accepts. Automaton has 11491 states and 35004 transitions. Word has length 22 [2021-06-05 21:26:17,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:17,489 INFO L482 AbstractCegarLoop]: Abstraction has 11491 states and 35004 transitions. [2021-06-05 21:26:17,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:17,489 INFO L276 IsEmpty]: Start isEmpty. Operand 11491 states and 35004 transitions. [2021-06-05 21:26:17,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:17,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:17,497 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:17,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9872 [2021-06-05 21:26:17,698 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:17,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:17,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1940843115, now seen corresponding path program 163 times [2021-06-05 21:26:17,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:17,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036531798] [2021-06-05 21:26:17,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:26:17,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:17,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036531798] [2021-06-05 21:26:17,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036531798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:17,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439539567] [2021-06-05 21:26:17,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:17,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:17,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:26:17,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439539567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:17,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:17,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:26:17,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422737455] [2021-06-05 21:26:17,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:26:17,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:17,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:26:17,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:26:17,840 INFO L87 Difference]: Start difference. First operand 11491 states and 35004 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:18,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:18,025 INFO L93 Difference]: Finished difference Result 12000 states and 36264 transitions. [2021-06-05 21:26:18,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:26:18,026 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:18,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:18,045 INFO L225 Difference]: With dead ends: 12000 [2021-06-05 21:26:18,045 INFO L226 Difference]: Without dead ends: 11996 [2021-06-05 21:26:18,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:26:18,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11996 states. [2021-06-05 21:26:18,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11996 to 11808. [2021-06-05 21:26:18,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11808 states, 11807 states have (on average 3.0505632252053867) internal successors, (36018), 11807 states have internal predecessors, (36018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:18,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11808 states to 11808 states and 36018 transitions. [2021-06-05 21:26:18,191 INFO L78 Accepts]: Start accepts. Automaton has 11808 states and 36018 transitions. Word has length 22 [2021-06-05 21:26:18,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:18,191 INFO L482 AbstractCegarLoop]: Abstraction has 11808 states and 36018 transitions. [2021-06-05 21:26:18,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:18,191 INFO L276 IsEmpty]: Start isEmpty. Operand 11808 states and 36018 transitions. [2021-06-05 21:26:18,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:18,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:18,199 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:18,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9873 [2021-06-05 21:26:18,400 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:18,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:18,400 INFO L82 PathProgramCache]: Analyzing trace with hash 469575189, now seen corresponding path program 164 times [2021-06-05 21:26:18,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:18,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851872793] [2021-06-05 21:26:18,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:18,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:18,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851872793] [2021-06-05 21:26:18,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851872793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:18,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440295811] [2021-06-05 21:26:18,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:18,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:18,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:18,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:18,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:18,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440295811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:18,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:18,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:18,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883271665] [2021-06-05 21:26:18,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:18,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:18,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:18,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:18,521 INFO L87 Difference]: Start difference. First operand 11808 states and 36018 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:18,646 INFO L93 Difference]: Finished difference Result 14397 states and 43404 transitions. [2021-06-05 21:26:18,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:26:18,647 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:18,664 INFO L225 Difference]: With dead ends: 14397 [2021-06-05 21:26:18,664 INFO L226 Difference]: Without dead ends: 14397 [2021-06-05 21:26:18,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:26:18,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14397 states. [2021-06-05 21:26:18,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14397 to 12614. [2021-06-05 21:26:18,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12614 states, 12613 states have (on average 3.0629509236502024) internal successors, (38633), 12613 states have internal predecessors, (38633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:18,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12614 states to 12614 states and 38633 transitions. [2021-06-05 21:26:18,852 INFO L78 Accepts]: Start accepts. Automaton has 12614 states and 38633 transitions. Word has length 22 [2021-06-05 21:26:18,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:18,852 INFO L482 AbstractCegarLoop]: Abstraction has 12614 states and 38633 transitions. [2021-06-05 21:26:18,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:18,853 INFO L276 IsEmpty]: Start isEmpty. Operand 12614 states and 38633 transitions. [2021-06-05 21:26:18,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:18,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:18,861 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:19,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9874,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:19,062 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:19,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:19,062 INFO L82 PathProgramCache]: Analyzing trace with hash -36771077, now seen corresponding path program 165 times [2021-06-05 21:26:19,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:19,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021668135] [2021-06-05 21:26:19,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:19,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:19,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021668135] [2021-06-05 21:26:19,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021668135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:19,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22686730] [2021-06-05 21:26:19,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:19,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:26:19,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:19,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:19,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:19,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22686730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:19,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:19,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:26:19,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979456871] [2021-06-05 21:26:19,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:19,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:19,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:19,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:19,214 INFO L87 Difference]: Start difference. First operand 12614 states and 38633 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:19,348 INFO L93 Difference]: Finished difference Result 15242 states and 46024 transitions. [2021-06-05 21:26:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:26:19,348 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:19,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:19,366 INFO L225 Difference]: With dead ends: 15242 [2021-06-05 21:26:19,366 INFO L226 Difference]: Without dead ends: 15242 [2021-06-05 21:26:19,366 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:26:19,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15242 states. [2021-06-05 21:26:19,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15242 to 6456. [2021-06-05 21:26:19,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6456 states, 6455 states have (on average 3.013787761425252) internal successors, (19454), 6455 states have internal predecessors, (19454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6456 states to 6456 states and 19454 transitions. [2021-06-05 21:26:19,484 INFO L78 Accepts]: Start accepts. Automaton has 6456 states and 19454 transitions. Word has length 22 [2021-06-05 21:26:19,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:19,484 INFO L482 AbstractCegarLoop]: Abstraction has 6456 states and 19454 transitions. [2021-06-05 21:26:19,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:19,484 INFO L276 IsEmpty]: Start isEmpty. Operand 6456 states and 19454 transitions. [2021-06-05 21:26:19,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:19,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:19,489 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:19,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9875 [2021-06-05 21:26:19,690 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:19,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:19,690 INFO L82 PathProgramCache]: Analyzing trace with hash 501084501, now seen corresponding path program 166 times [2021-06-05 21:26:19,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:19,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733370383] [2021-06-05 21:26:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:19,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:19,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733370383] [2021-06-05 21:26:19,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733370383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:19,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516105650] [2021-06-05 21:26:19,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:19,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:19,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:19,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:19,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:19,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516105650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:19,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:19,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:26:19,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180673403] [2021-06-05 21:26:19,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:19,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:19,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:19,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:19,825 INFO L87 Difference]: Start difference. First operand 6456 states and 19454 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:19,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:19,979 INFO L93 Difference]: Finished difference Result 9785 states and 29004 transitions. [2021-06-05 21:26:19,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:26:19,980 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:19,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:19,989 INFO L225 Difference]: With dead ends: 9785 [2021-06-05 21:26:19,989 INFO L226 Difference]: Without dead ends: 9785 [2021-06-05 21:26:19,989 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:19,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9785 states. [2021-06-05 21:26:20,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9785 to 6500. [2021-06-05 21:26:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6500 states, 6499 states have (on average 3.014002154177566) internal successors, (19588), 6499 states have internal predecessors, (19588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:20,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 19588 transitions. [2021-06-05 21:26:20,077 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 19588 transitions. Word has length 22 [2021-06-05 21:26:20,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:20,077 INFO L482 AbstractCegarLoop]: Abstraction has 6500 states and 19588 transitions. [2021-06-05 21:26:20,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:20,077 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 19588 transitions. [2021-06-05 21:26:20,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:20,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:20,082 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:20,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9876,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:20,282 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:20,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:20,282 INFO L82 PathProgramCache]: Analyzing trace with hash -776445359, now seen corresponding path program 167 times [2021-06-05 21:26:20,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:20,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209696067] [2021-06-05 21:26:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:20,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:20,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209696067] [2021-06-05 21:26:20,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209696067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:20,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135144690] [2021-06-05 21:26:20,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:20,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:26:20,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:20,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:20,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:20,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135144690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:20,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:20,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:20,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322671848] [2021-06-05 21:26:20,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:20,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:20,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:20,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:20,398 INFO L87 Difference]: Start difference. First operand 6500 states and 19588 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:20,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:20,567 INFO L93 Difference]: Finished difference Result 6765 states and 19991 transitions. [2021-06-05 21:26:20,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:26:20,567 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:20,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:20,573 INFO L225 Difference]: With dead ends: 6765 [2021-06-05 21:26:20,573 INFO L226 Difference]: Without dead ends: 6761 [2021-06-05 21:26:20,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:26:20,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6761 states. [2021-06-05 21:26:20,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6761 to 6403. [2021-06-05 21:26:20,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6403 states, 6402 states have (on average 3.009215870040612) internal successors, (19265), 6402 states have internal predecessors, (19265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6403 states to 6403 states and 19265 transitions. [2021-06-05 21:26:20,647 INFO L78 Accepts]: Start accepts. Automaton has 6403 states and 19265 transitions. Word has length 22 [2021-06-05 21:26:20,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:20,647 INFO L482 AbstractCegarLoop]: Abstraction has 6403 states and 19265 transitions. [2021-06-05 21:26:20,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:20,647 INFO L276 IsEmpty]: Start isEmpty. Operand 6403 states and 19265 transitions. [2021-06-05 21:26:20,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:20,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:20,652 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:20,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9877 [2021-06-05 21:26:20,852 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:20,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:20,852 INFO L82 PathProgramCache]: Analyzing trace with hash 941303701, now seen corresponding path program 168 times [2021-06-05 21:26:20,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:20,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638161030] [2021-06-05 21:26:20,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:20,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:20,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638161030] [2021-06-05 21:26:20,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638161030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:20,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407530563] [2021-06-05 21:26:20,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:20,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:26:20,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:20,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:20,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:21,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407530563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:21,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:21,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:21,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193478366] [2021-06-05 21:26:21,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:21,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:21,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:21,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:21,010 INFO L87 Difference]: Start difference. First operand 6403 states and 19265 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:21,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:21,101 INFO L93 Difference]: Finished difference Result 6899 states and 20313 transitions. [2021-06-05 21:26:21,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:26:21,102 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:21,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:21,110 INFO L225 Difference]: With dead ends: 6899 [2021-06-05 21:26:21,110 INFO L226 Difference]: Without dead ends: 6899 [2021-06-05 21:26:21,111 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:21,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-06-05 21:26:21,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 6402. [2021-06-05 21:26:21,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6402 states, 6401 states have (on average 3.0073426027183254) internal successors, (19250), 6401 states have internal predecessors, (19250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:21,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6402 states to 6402 states and 19250 transitions. [2021-06-05 21:26:21,215 INFO L78 Accepts]: Start accepts. Automaton has 6402 states and 19250 transitions. Word has length 22 [2021-06-05 21:26:21,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:21,215 INFO L482 AbstractCegarLoop]: Abstraction has 6402 states and 19250 transitions. [2021-06-05 21:26:21,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:21,215 INFO L276 IsEmpty]: Start isEmpty. Operand 6402 states and 19250 transitions. [2021-06-05 21:26:21,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:21,221 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:21,221 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:21,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9878,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:21,443 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:21,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:21,443 INFO L82 PathProgramCache]: Analyzing trace with hash -787743633, now seen corresponding path program 169 times [2021-06-05 21:26:21,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:21,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183773479] [2021-06-05 21:26:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:21,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:21,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183773479] [2021-06-05 21:26:21,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183773479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:21,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325127869] [2021-06-05 21:26:21,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:21,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:21,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:21,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325127869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:21,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:21,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:26:21,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545304877] [2021-06-05 21:26:21,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:21,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:21,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:21,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:21,582 INFO L87 Difference]: Start difference. First operand 6402 states and 19250 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:21,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:21,670 INFO L93 Difference]: Finished difference Result 6620 states and 19508 transitions. [2021-06-05 21:26:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:26:21,670 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:21,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:21,676 INFO L225 Difference]: With dead ends: 6620 [2021-06-05 21:26:21,676 INFO L226 Difference]: Without dead ends: 6620 [2021-06-05 21:26:21,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:26:21,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6620 states. [2021-06-05 21:26:21,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6620 to 6370. [2021-06-05 21:26:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6370 states, 6369 states have (on average 3.004396294551735) internal successors, (19135), 6369 states have internal predecessors, (19135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:21,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6370 states to 6370 states and 19135 transitions. [2021-06-05 21:26:21,742 INFO L78 Accepts]: Start accepts. Automaton has 6370 states and 19135 transitions. Word has length 22 [2021-06-05 21:26:21,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:21,742 INFO L482 AbstractCegarLoop]: Abstraction has 6370 states and 19135 transitions. [2021-06-05 21:26:21,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:21,742 INFO L276 IsEmpty]: Start isEmpty. Operand 6370 states and 19135 transitions. [2021-06-05 21:26:21,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:21,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:21,746 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:21,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9879,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:21,947 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:21,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:21,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1446363861, now seen corresponding path program 170 times [2021-06-05 21:26:21,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:21,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622400089] [2021-06-05 21:26:21,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:22,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:22,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622400089] [2021-06-05 21:26:22,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622400089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:22,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050138103] [2021-06-05 21:26:22,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:22,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:22,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:22,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:22,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:22,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050138103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:22,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:22,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:26:22,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943838635] [2021-06-05 21:26:22,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:22,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:22,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:22,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:22,115 INFO L87 Difference]: Start difference. First operand 6370 states and 19135 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:22,221 INFO L93 Difference]: Finished difference Result 7662 states and 22542 transitions. [2021-06-05 21:26:22,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:26:22,221 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:22,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:22,227 INFO L225 Difference]: With dead ends: 7662 [2021-06-05 21:26:22,227 INFO L226 Difference]: Without dead ends: 7662 [2021-06-05 21:26:22,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:26:22,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7662 states. [2021-06-05 21:26:22,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7662 to 6264. [2021-06-05 21:26:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6264 states, 6263 states have (on average 2.9996806642184257) internal successors, (18787), 6263 states have internal predecessors, (18787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6264 states to 6264 states and 18787 transitions. [2021-06-05 21:26:22,301 INFO L78 Accepts]: Start accepts. Automaton has 6264 states and 18787 transitions. Word has length 22 [2021-06-05 21:26:22,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:22,301 INFO L482 AbstractCegarLoop]: Abstraction has 6264 states and 18787 transitions. [2021-06-05 21:26:22,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:22,301 INFO L276 IsEmpty]: Start isEmpty. Operand 6264 states and 18787 transitions. [2021-06-05 21:26:22,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:22,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:22,305 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:22,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9880,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:22,506 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:22,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:22,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1984219439, now seen corresponding path program 171 times [2021-06-05 21:26:22,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:22,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251769480] [2021-06-05 21:26:22,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:22,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:22,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251769480] [2021-06-05 21:26:22,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251769480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:22,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488821360] [2021-06-05 21:26:22,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:22,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:26:22,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:22,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:22,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:22,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488821360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:22,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:22,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:26:22,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788524617] [2021-06-05 21:26:22,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:22,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:22,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:22,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:22,649 INFO L87 Difference]: Start difference. First operand 6264 states and 18787 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:22,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:22,779 INFO L93 Difference]: Finished difference Result 9995 states and 29712 transitions. [2021-06-05 21:26:22,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:26:22,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:22,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:22,789 INFO L225 Difference]: With dead ends: 9995 [2021-06-05 21:26:22,789 INFO L226 Difference]: Without dead ends: 9995 [2021-06-05 21:26:22,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:26:22,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9995 states. [2021-06-05 21:26:22,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9995 to 7256. [2021-06-05 21:26:22,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7256 states, 7255 states have (on average 3.0132322536181944) internal successors, (21861), 7255 states have internal predecessors, (21861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7256 states to 7256 states and 21861 transitions. [2021-06-05 21:26:22,883 INFO L78 Accepts]: Start accepts. Automaton has 7256 states and 21861 transitions. Word has length 22 [2021-06-05 21:26:22,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:22,883 INFO L482 AbstractCegarLoop]: Abstraction has 7256 states and 21861 transitions. [2021-06-05 21:26:22,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:22,884 INFO L276 IsEmpty]: Start isEmpty. Operand 7256 states and 21861 transitions. [2021-06-05 21:26:22,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:22,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:22,888 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:23,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9881 [2021-06-05 21:26:23,089 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:23,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:23,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1477873173, now seen corresponding path program 172 times [2021-06-05 21:26:23,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:23,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45945522] [2021-06-05 21:26:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:23,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:23,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45945522] [2021-06-05 21:26:23,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45945522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:23,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014795672] [2021-06-05 21:26:23,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:23,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:23,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:23,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:23,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:23,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014795672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:23,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:23,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:26:23,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734748922] [2021-06-05 21:26:23,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:23,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:23,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:23,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:23,229 INFO L87 Difference]: Start difference. First operand 7256 states and 21861 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:23,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:23,431 INFO L93 Difference]: Finished difference Result 11660 states and 34640 transitions. [2021-06-05 21:26:23,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:26:23,431 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:23,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:23,443 INFO L225 Difference]: With dead ends: 11660 [2021-06-05 21:26:23,443 INFO L226 Difference]: Without dead ends: 11660 [2021-06-05 21:26:23,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=309, Invalid=561, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:26:23,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11660 states. [2021-06-05 21:26:23,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11660 to 9258. [2021-06-05 21:26:23,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9258 states, 9257 states have (on average 3.0371610673004215) internal successors, (28115), 9257 states have internal predecessors, (28115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9258 states to 9258 states and 28115 transitions. [2021-06-05 21:26:23,564 INFO L78 Accepts]: Start accepts. Automaton has 9258 states and 28115 transitions. Word has length 22 [2021-06-05 21:26:23,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:23,564 INFO L482 AbstractCegarLoop]: Abstraction has 9258 states and 28115 transitions. [2021-06-05 21:26:23,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand 9258 states and 28115 transitions. [2021-06-05 21:26:23,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:23,570 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:23,571 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:23,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9882,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:23,771 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:23,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:23,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2074645977, now seen corresponding path program 173 times [2021-06-05 21:26:23,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:23,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811232619] [2021-06-05 21:26:23,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:26:23,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:23,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811232619] [2021-06-05 21:26:23,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811232619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:23,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785900192] [2021-06-05 21:26:23,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:23,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:26:23,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:23,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:23,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:26:23,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785900192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:23,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:23,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:26:23,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336140733] [2021-06-05 21:26:23,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:26:23,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:23,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:26:23,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:26:23,882 INFO L87 Difference]: Start difference. First operand 9258 states and 28115 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:24,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:24,028 INFO L93 Difference]: Finished difference Result 9612 states and 28912 transitions. [2021-06-05 21:26:24,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:26:24,028 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:24,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:24,038 INFO L225 Difference]: With dead ends: 9612 [2021-06-05 21:26:24,038 INFO L226 Difference]: Without dead ends: 9608 [2021-06-05 21:26:24,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:26:24,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9608 states. [2021-06-05 21:26:24,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9608 to 9445. [2021-06-05 21:26:24,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9445 states, 9444 states have (on average 3.039919525624735) internal successors, (28709), 9444 states have internal predecessors, (28709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9445 states to 9445 states and 28709 transitions. [2021-06-05 21:26:24,146 INFO L78 Accepts]: Start accepts. Automaton has 9445 states and 28709 transitions. Word has length 22 [2021-06-05 21:26:24,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:24,146 INFO L482 AbstractCegarLoop]: Abstraction has 9445 states and 28709 transitions. [2021-06-05 21:26:24,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:24,146 INFO L276 IsEmpty]: Start isEmpty. Operand 9445 states and 28709 transitions. [2021-06-05 21:26:24,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:24,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:24,153 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:24,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9883 [2021-06-05 21:26:24,353 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:24,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:24,353 INFO L82 PathProgramCache]: Analyzing trace with hash 367281639, now seen corresponding path program 174 times [2021-06-05 21:26:24,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:24,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316379267] [2021-06-05 21:26:24,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:24,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:24,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316379267] [2021-06-05 21:26:24,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316379267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:24,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861885758] [2021-06-05 21:26:24,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:24,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:26:24,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:24,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:24,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:24,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861885758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:24,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:24,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:26:24,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318975921] [2021-06-05 21:26:24,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:24,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:24,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:24,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:24,482 INFO L87 Difference]: Start difference. First operand 9445 states and 28709 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:24,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:24,638 INFO L93 Difference]: Finished difference Result 12460 states and 37247 transitions. [2021-06-05 21:26:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:26:24,639 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:24,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:24,652 INFO L225 Difference]: With dead ends: 12460 [2021-06-05 21:26:24,652 INFO L226 Difference]: Without dead ends: 12460 [2021-06-05 21:26:24,653 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:24,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12460 states. [2021-06-05 21:26:24,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12460 to 9999. [2021-06-05 21:26:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9999 states, 9998 states have (on average 3.049109821964393) internal successors, (30485), 9998 states have internal predecessors, (30485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9999 states to 9999 states and 30485 transitions. [2021-06-05 21:26:24,791 INFO L78 Accepts]: Start accepts. Automaton has 9999 states and 30485 transitions. Word has length 22 [2021-06-05 21:26:24,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:24,792 INFO L482 AbstractCegarLoop]: Abstraction has 9999 states and 30485 transitions. [2021-06-05 21:26:24,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 9999 states and 30485 transitions. [2021-06-05 21:26:24,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:24,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:24,799 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:24,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9884 [2021-06-05 21:26:24,999 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:25,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:25,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1850416577, now seen corresponding path program 175 times [2021-06-05 21:26:25,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:25,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362451390] [2021-06-05 21:26:25,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:25,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:25,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362451390] [2021-06-05 21:26:25,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362451390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:25,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596331396] [2021-06-05 21:26:25,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:25,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:25,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:25,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596331396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:25,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:25,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:26:25,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640171110] [2021-06-05 21:26:25,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:25,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:25,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:25,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:25,133 INFO L87 Difference]: Start difference. First operand 9999 states and 30485 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:25,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:25,285 INFO L93 Difference]: Finished difference Result 12909 states and 38690 transitions. [2021-06-05 21:26:25,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:26:25,285 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:25,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:25,300 INFO L225 Difference]: With dead ends: 12909 [2021-06-05 21:26:25,300 INFO L226 Difference]: Without dead ends: 12909 [2021-06-05 21:26:25,300 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:25,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12909 states. [2021-06-05 21:26:25,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12909 to 6060. [2021-06-05 21:26:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6060 states, 6059 states have (on average 3.0120481927710845) internal successors, (18250), 6059 states have internal predecessors, (18250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:25,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 18250 transitions. [2021-06-05 21:26:25,404 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 18250 transitions. Word has length 22 [2021-06-05 21:26:25,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:25,404 INFO L482 AbstractCegarLoop]: Abstraction has 6060 states and 18250 transitions. [2021-06-05 21:26:25,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:25,404 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 18250 transitions. [2021-06-05 21:26:25,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:25,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:25,409 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:25,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9885 [2021-06-05 21:26:25,609 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:25,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1344070311, now seen corresponding path program 176 times [2021-06-05 21:26:25,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:25,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584121118] [2021-06-05 21:26:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:25,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:25,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584121118] [2021-06-05 21:26:25,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584121118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:25,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394832286] [2021-06-05 21:26:25,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:25,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:25,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:25,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:25,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:25,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394832286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:25,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:25,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:26:25,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653143873] [2021-06-05 21:26:25,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:25,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:25,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:25,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:25,769 INFO L87 Difference]: Start difference. First operand 6060 states and 18250 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:25,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:25,986 INFO L93 Difference]: Finished difference Result 9798 states and 28894 transitions. [2021-06-05 21:26:25,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:26:25,986 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:25,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:25,999 INFO L225 Difference]: With dead ends: 9798 [2021-06-05 21:26:26,000 INFO L226 Difference]: Without dead ends: 9798 [2021-06-05 21:26:26,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=308, Invalid=562, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:26:26,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9798 states. [2021-06-05 21:26:26,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9798 to 5868. [2021-06-05 21:26:26,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5868 states, 5867 states have (on average 3.0093744673598093) internal successors, (17656), 5867 states have internal predecessors, (17656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5868 states to 5868 states and 17656 transitions. [2021-06-05 21:26:26,122 INFO L78 Accepts]: Start accepts. Automaton has 5868 states and 17656 transitions. Word has length 22 [2021-06-05 21:26:26,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:26,122 INFO L482 AbstractCegarLoop]: Abstraction has 5868 states and 17656 transitions. [2021-06-05 21:26:26,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:26,122 INFO L276 IsEmpty]: Start isEmpty. Operand 5868 states and 17656 transitions. [2021-06-05 21:26:26,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:26,128 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:26,128 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:26,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9886 [2021-06-05 21:26:26,351 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:26,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:26,351 INFO L82 PathProgramCache]: Analyzing trace with hash 2117261897, now seen corresponding path program 177 times [2021-06-05 21:26:26,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:26,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937496156] [2021-06-05 21:26:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:26,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:26,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937496156] [2021-06-05 21:26:26,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937496156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:26,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890820188] [2021-06-05 21:26:26,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:26,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:26:26,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:26,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:26,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:26,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890820188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:26,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:26,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:26,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964855050] [2021-06-05 21:26:26,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:26,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:26,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:26,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:26,482 INFO L87 Difference]: Start difference. First operand 5868 states and 17656 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:26,631 INFO L93 Difference]: Finished difference Result 6116 states and 18033 transitions. [2021-06-05 21:26:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:26:26,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:26,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:26,637 INFO L225 Difference]: With dead ends: 6116 [2021-06-05 21:26:26,637 INFO L226 Difference]: Without dead ends: 6112 [2021-06-05 21:26:26,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=205, Invalid=347, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:26:26,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2021-06-05 21:26:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 5813. [2021-06-05 21:26:26,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5813 states, 5812 states have (on average 3.0051617343427393) internal successors, (17466), 5812 states have internal predecessors, (17466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:26,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5813 states to 5813 states and 17466 transitions. [2021-06-05 21:26:26,720 INFO L78 Accepts]: Start accepts. Automaton has 5813 states and 17466 transitions. Word has length 22 [2021-06-05 21:26:26,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:26,721 INFO L482 AbstractCegarLoop]: Abstraction has 5813 states and 17466 transitions. [2021-06-05 21:26:26,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:26,721 INFO L276 IsEmpty]: Start isEmpty. Operand 5813 states and 17466 transitions. [2021-06-05 21:26:26,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:26,724 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:26,724 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:26,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9887 [2021-06-05 21:26:26,925 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:26,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:26,925 INFO L82 PathProgramCache]: Analyzing trace with hash -459956339, now seen corresponding path program 178 times [2021-06-05 21:26:26,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:26,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656336922] [2021-06-05 21:26:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:26,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:26,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656336922] [2021-06-05 21:26:26,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656336922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:26,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838058292] [2021-06-05 21:26:26,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:27,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:27,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:27,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:27,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:27,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838058292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:27,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:27,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:27,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989010557] [2021-06-05 21:26:27,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:27,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:27,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:27,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:27,048 INFO L87 Difference]: Start difference. First operand 5813 states and 17466 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:27,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:27,130 INFO L93 Difference]: Finished difference Result 6374 states and 18724 transitions. [2021-06-05 21:26:27,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:26:27,130 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:27,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:27,136 INFO L225 Difference]: With dead ends: 6374 [2021-06-05 21:26:27,136 INFO L226 Difference]: Without dead ends: 6374 [2021-06-05 21:26:27,136 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:26:27,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6374 states. [2021-06-05 21:26:27,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6374 to 5821. [2021-06-05 21:26:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 3.004982817869416) internal successors, (17489), 5820 states have internal predecessors, (17489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:27,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 17489 transitions. [2021-06-05 21:26:27,200 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 17489 transitions. Word has length 22 [2021-06-05 21:26:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:27,200 INFO L482 AbstractCegarLoop]: Abstraction has 5821 states and 17489 transitions. [2021-06-05 21:26:27,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 17489 transitions. [2021-06-05 21:26:27,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:27,205 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:27,205 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:27,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9888,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:27,405 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:27,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:27,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2105963623, now seen corresponding path program 179 times [2021-06-05 21:26:27,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:27,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932995778] [2021-06-05 21:26:27,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:27,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:27,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932995778] [2021-06-05 21:26:27,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932995778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:27,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990523733] [2021-06-05 21:26:27,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:27,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:26:27,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:27,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:27,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:27,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990523733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:27,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:27,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:26:27,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618804213] [2021-06-05 21:26:27,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:27,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:27,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:27,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:27,557 INFO L87 Difference]: Start difference. First operand 5821 states and 17489 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:27,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:27,654 INFO L93 Difference]: Finished difference Result 6454 states and 18955 transitions. [2021-06-05 21:26:27,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:26:27,654 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:27,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:27,660 INFO L225 Difference]: With dead ends: 6454 [2021-06-05 21:26:27,660 INFO L226 Difference]: Without dead ends: 6454 [2021-06-05 21:26:27,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:26:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2021-06-05 21:26:27,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 5751. [2021-06-05 21:26:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5751 states, 5750 states have (on average 3.001391304347826) internal successors, (17258), 5750 states have internal predecessors, (17258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:27,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5751 states to 5751 states and 17258 transitions. [2021-06-05 21:26:27,725 INFO L78 Accepts]: Start accepts. Automaton has 5751 states and 17258 transitions. Word has length 22 [2021-06-05 21:26:27,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:27,725 INFO L482 AbstractCegarLoop]: Abstraction has 5751 states and 17258 transitions. [2021-06-05 21:26:27,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:27,725 INFO L276 IsEmpty]: Start isEmpty. Operand 5751 states and 17258 transitions. [2021-06-05 21:26:27,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:27,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:27,729 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:27,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9889,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:27,930 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:27,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:27,930 INFO L82 PathProgramCache]: Analyzing trace with hash 45103821, now seen corresponding path program 180 times [2021-06-05 21:26:27,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:27,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733115843] [2021-06-05 21:26:27,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:27,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:27,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733115843] [2021-06-05 21:26:27,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733115843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:27,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945527471] [2021-06-05 21:26:27,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:28,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:26:28,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:28,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:28,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:28,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945527471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:28,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:28,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:26:28,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83509271] [2021-06-05 21:26:28,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:28,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:28,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:28,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:28,073 INFO L87 Difference]: Start difference. First operand 5751 states and 17258 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:28,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:28,160 INFO L93 Difference]: Finished difference Result 9965 states and 29813 transitions. [2021-06-05 21:26:28,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:26:28,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:28,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:28,170 INFO L225 Difference]: With dead ends: 9965 [2021-06-05 21:26:28,170 INFO L226 Difference]: Without dead ends: 9965 [2021-06-05 21:26:28,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:26:28,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9965 states. [2021-06-05 21:26:28,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9965 to 9679. [2021-06-05 21:26:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9679 states, 9678 states have (on average 3.0377144038024384) internal successors, (29399), 9678 states have internal predecessors, (29399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:28,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9679 states to 9679 states and 29399 transitions. [2021-06-05 21:26:28,280 INFO L78 Accepts]: Start accepts. Automaton has 9679 states and 29399 transitions. Word has length 22 [2021-06-05 21:26:28,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:28,280 INFO L482 AbstractCegarLoop]: Abstraction has 9679 states and 29399 transitions. [2021-06-05 21:26:28,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:28,280 INFO L276 IsEmpty]: Start isEmpty. Operand 9679 states and 29399 transitions. [2021-06-05 21:26:28,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:28,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:28,285 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:28,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9890,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:28,486 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:28,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:28,486 INFO L82 PathProgramCache]: Analyzing trace with hash 582959399, now seen corresponding path program 181 times [2021-06-05 21:26:28,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:28,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019145471] [2021-06-05 21:26:28,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:28,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:28,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019145471] [2021-06-05 21:26:28,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019145471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:28,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183012698] [2021-06-05 21:26:28,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:28,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:28,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:28,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183012698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:28,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:28,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:26:28,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146767494] [2021-06-05 21:26:28,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:28,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:28,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:28,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:28,619 INFO L87 Difference]: Start difference. First operand 9679 states and 29399 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:28,749 INFO L93 Difference]: Finished difference Result 10632 states and 31706 transitions. [2021-06-05 21:26:28,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:26:28,750 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:28,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:28,762 INFO L225 Difference]: With dead ends: 10632 [2021-06-05 21:26:28,762 INFO L226 Difference]: Without dead ends: 10632 [2021-06-05 21:26:28,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:26:28,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2021-06-05 21:26:28,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 8622. [2021-06-05 21:26:28,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8622 states, 8621 states have (on average 3.030506901751537) internal successors, (26126), 8621 states have internal predecessors, (26126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8622 states to 8622 states and 26126 transitions. [2021-06-05 21:26:28,870 INFO L78 Accepts]: Start accepts. Automaton has 8622 states and 26126 transitions. Word has length 22 [2021-06-05 21:26:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:28,871 INFO L482 AbstractCegarLoop]: Abstraction has 8622 states and 26126 transitions. [2021-06-05 21:26:28,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:28,871 INFO L276 IsEmpty]: Start isEmpty. Operand 8622 states and 26126 transitions. [2021-06-05 21:26:28,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:28,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:28,876 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:29,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9891 [2021-06-05 21:26:29,076 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:29,076 INFO L82 PathProgramCache]: Analyzing trace with hash 76613133, now seen corresponding path program 182 times [2021-06-05 21:26:29,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:29,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589630562] [2021-06-05 21:26:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:29,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:29,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589630562] [2021-06-05 21:26:29,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589630562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:29,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21037561] [2021-06-05 21:26:29,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:29,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:29,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:29,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:29,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:29,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21037561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:29,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:29,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:26:29,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395757538] [2021-06-05 21:26:29,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:29,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:29,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:29,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:29,213 INFO L87 Difference]: Start difference. First operand 8622 states and 26126 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:29,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:29,388 INFO L93 Difference]: Finished difference Result 14571 states and 43929 transitions. [2021-06-05 21:26:29,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:26:29,388 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:29,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:29,404 INFO L225 Difference]: With dead ends: 14571 [2021-06-05 21:26:29,404 INFO L226 Difference]: Without dead ends: 14571 [2021-06-05 21:26:29,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:26:29,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14571 states. [2021-06-05 21:26:29,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14571 to 13534. [2021-06-05 21:26:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13534 states, 13533 states have (on average 3.05660237936895) internal successors, (41365), 13533 states have internal predecessors, (41365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:29,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13534 states to 13534 states and 41365 transitions. [2021-06-05 21:26:29,582 INFO L78 Accepts]: Start accepts. Automaton has 13534 states and 41365 transitions. Word has length 22 [2021-06-05 21:26:29,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:29,582 INFO L482 AbstractCegarLoop]: Abstraction has 13534 states and 41365 transitions. [2021-06-05 21:26:29,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:29,583 INFO L276 IsEmpty]: Start isEmpty. Operand 13534 states and 41365 transitions. [2021-06-05 21:26:29,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:29,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:29,590 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:29,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9892 [2021-06-05 21:26:29,791 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:29,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:29,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1559748071, now seen corresponding path program 183 times [2021-06-05 21:26:29,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:29,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607518417] [2021-06-05 21:26:29,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:29,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:29,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607518417] [2021-06-05 21:26:29,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607518417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:29,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879858752] [2021-06-05 21:26:29,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:29,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:26:29,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:29,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:29,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:29,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879858752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:29,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:29,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:26:29,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542667324] [2021-06-05 21:26:29,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:29,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:29,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:29,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:29,956 INFO L87 Difference]: Start difference. First operand 13534 states and 41365 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:30,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:30,226 INFO L93 Difference]: Finished difference Result 19456 states and 59104 transitions. [2021-06-05 21:26:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:26:30,226 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:30,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:30,250 INFO L225 Difference]: With dead ends: 19456 [2021-06-05 21:26:30,250 INFO L226 Difference]: Without dead ends: 19456 [2021-06-05 21:26:30,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 208.8ms TimeCoverageRelationStatistics Valid=411, Invalid=779, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:26:30,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19456 states. [2021-06-05 21:26:30,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19456 to 17545. [2021-06-05 21:26:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17545 states, 17544 states have (on average 3.0747264021887823) internal successors, (53943), 17544 states have internal predecessors, (53943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17545 states to 17545 states and 53943 transitions. [2021-06-05 21:26:30,488 INFO L78 Accepts]: Start accepts. Automaton has 17545 states and 53943 transitions. Word has length 22 [2021-06-05 21:26:30,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:30,488 INFO L482 AbstractCegarLoop]: Abstraction has 17545 states and 53943 transitions. [2021-06-05 21:26:30,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:30,488 INFO L276 IsEmpty]: Start isEmpty. Operand 17545 states and 53943 transitions. [2021-06-05 21:26:30,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:30,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:30,497 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:30,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9893 [2021-06-05 21:26:30,698 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:30,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:30,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1491148885, now seen corresponding path program 184 times [2021-06-05 21:26:30,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:30,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548507432] [2021-06-05 21:26:30,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:30,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:30,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548507432] [2021-06-05 21:26:30,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548507432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:30,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40268344] [2021-06-05 21:26:30,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:30,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:30,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:30,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:30,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:30,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40268344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:30,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:30,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:26:30,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954956259] [2021-06-05 21:26:30,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:30,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:30,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:30,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:30,831 INFO L87 Difference]: Start difference. First operand 17545 states and 53943 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:31,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:31,056 INFO L93 Difference]: Finished difference Result 24132 states and 73287 transitions. [2021-06-05 21:26:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:26:31,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:31,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:31,086 INFO L225 Difference]: With dead ends: 24132 [2021-06-05 21:26:31,086 INFO L226 Difference]: Without dead ends: 24132 [2021-06-05 21:26:31,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:26:31,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24132 states. [2021-06-05 21:26:31,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24132 to 13806. [2021-06-05 21:26:31,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13806 states, 13805 states have (on average 3.0678739587106123) internal successors, (42352), 13805 states have internal predecessors, (42352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:31,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13806 states to 13806 states and 42352 transitions. [2021-06-05 21:26:31,371 INFO L78 Accepts]: Start accepts. Automaton has 13806 states and 42352 transitions. Word has length 22 [2021-06-05 21:26:31,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:31,371 INFO L482 AbstractCegarLoop]: Abstraction has 13806 states and 42352 transitions. [2021-06-05 21:26:31,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:31,371 INFO L276 IsEmpty]: Start isEmpty. Operand 13806 states and 42352 transitions. [2021-06-05 21:26:31,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:31,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:31,379 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:31,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9894,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:31,579 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:31,580 INFO L82 PathProgramCache]: Analyzing trace with hash 223691707, now seen corresponding path program 185 times [2021-06-05 21:26:31,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:31,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176345199] [2021-06-05 21:26:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:31,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:31,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176345199] [2021-06-05 21:26:31,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176345199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:31,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093044636] [2021-06-05 21:26:31,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:31,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:26:31,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:31,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:31,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:31,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093044636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:31,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:31,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:26:31,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262391005] [2021-06-05 21:26:31,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:31,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:31,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:31,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:31,713 INFO L87 Difference]: Start difference. First operand 13806 states and 42352 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:31,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:31,921 INFO L93 Difference]: Finished difference Result 20948 states and 63957 transitions. [2021-06-05 21:26:31,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:26:31,922 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:31,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:31,947 INFO L225 Difference]: With dead ends: 20948 [2021-06-05 21:26:31,947 INFO L226 Difference]: Without dead ends: 20948 [2021-06-05 21:26:31,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:26:31,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20948 states. [2021-06-05 21:26:32,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20948 to 19052. [2021-06-05 21:26:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19052 states, 19051 states have (on average 3.0863996640596296) internal successors, (58799), 19051 states have internal predecessors, (58799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:32,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19052 states to 19052 states and 58799 transitions. [2021-06-05 21:26:32,222 INFO L78 Accepts]: Start accepts. Automaton has 19052 states and 58799 transitions. Word has length 22 [2021-06-05 21:26:32,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:32,223 INFO L482 AbstractCegarLoop]: Abstraction has 19052 states and 58799 transitions. [2021-06-05 21:26:32,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:32,223 INFO L276 IsEmpty]: Start isEmpty. Operand 19052 states and 58799 transitions. [2021-06-05 21:26:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:32,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:32,231 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:32,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9895 [2021-06-05 21:26:32,432 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:32,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:32,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1706826645, now seen corresponding path program 186 times [2021-06-05 21:26:32,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:32,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264907286] [2021-06-05 21:26:32,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:32,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:32,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264907286] [2021-06-05 21:26:32,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264907286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:32,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959512240] [2021-06-05 21:26:32,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:32,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:26:32,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:32,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:32,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:32,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959512240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:32,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:32,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:26:32,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98919472] [2021-06-05 21:26:32,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:32,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:32,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:32,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:32,568 INFO L87 Difference]: Start difference. First operand 19052 states and 58799 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:32,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:32,853 INFO L93 Difference]: Finished difference Result 28543 states and 87595 transitions. [2021-06-05 21:26:32,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:26:32,854 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:32,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:32,894 INFO L225 Difference]: With dead ends: 28543 [2021-06-05 21:26:32,894 INFO L226 Difference]: Without dead ends: 28543 [2021-06-05 21:26:32,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=410, Invalid=780, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:26:32,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28543 states. [2021-06-05 21:26:33,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28543 to 26854. [2021-06-05 21:26:33,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26854 states, 26853 states have (on average 3.0954455740513165) internal successors, (83122), 26853 states have internal predecessors, (83122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26854 states to 26854 states and 83122 transitions. [2021-06-05 21:26:33,281 INFO L78 Accepts]: Start accepts. Automaton has 26854 states and 83122 transitions. Word has length 22 [2021-06-05 21:26:33,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:33,281 INFO L482 AbstractCegarLoop]: Abstraction has 26854 states and 83122 transitions. [2021-06-05 21:26:33,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:33,281 INFO L276 IsEmpty]: Start isEmpty. Operand 26854 states and 83122 transitions. [2021-06-05 21:26:33,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:33,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:33,291 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:33,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9896 [2021-06-05 21:26:33,491 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:33,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:33,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1627873617, now seen corresponding path program 187 times [2021-06-05 21:26:33,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:33,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425701392] [2021-06-05 21:26:33,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:33,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:33,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425701392] [2021-06-05 21:26:33,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425701392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:33,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693844627] [2021-06-05 21:26:33,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:33,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:33,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:33,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693844627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:33,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:33,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:33,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221387163] [2021-06-05 21:26:33,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:33,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:33,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:33,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:33,602 INFO L87 Difference]: Start difference. First operand 26854 states and 83122 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:33,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:33,816 INFO L93 Difference]: Finished difference Result 27245 states and 83974 transitions. [2021-06-05 21:26:33,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:26:33,816 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:33,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:33,853 INFO L225 Difference]: With dead ends: 27245 [2021-06-05 21:26:33,854 INFO L226 Difference]: Without dead ends: 27241 [2021-06-05 21:26:33,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=204, Invalid=348, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:26:33,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27241 states. [2021-06-05 21:26:34,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27241 to 25289. [2021-06-05 21:26:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25289 states, 25288 states have (on average 3.0879863967099017) internal successors, (78089), 25288 states have internal predecessors, (78089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25289 states to 25289 states and 78089 transitions. [2021-06-05 21:26:34,409 INFO L78 Accepts]: Start accepts. Automaton has 25289 states and 78089 transitions. Word has length 22 [2021-06-05 21:26:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:34,409 INFO L482 AbstractCegarLoop]: Abstraction has 25289 states and 78089 transitions. [2021-06-05 21:26:34,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:34,410 INFO L276 IsEmpty]: Start isEmpty. Operand 25289 states and 78089 transitions. [2021-06-05 21:26:34,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:34,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:34,418 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:34,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9897,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:34,621 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:34,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:34,621 INFO L82 PathProgramCache]: Analyzing trace with hash -949344619, now seen corresponding path program 188 times [2021-06-05 21:26:34,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:34,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582273802] [2021-06-05 21:26:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:34,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:34,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582273802] [2021-06-05 21:26:34,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582273802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:34,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190230352] [2021-06-05 21:26:34,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:34,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:34,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:34,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:34,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:34,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190230352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:34,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:34,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:34,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289089543] [2021-06-05 21:26:34,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:34,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:34,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:34,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:34,737 INFO L87 Difference]: Start difference. First operand 25289 states and 78089 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:34,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:34,881 INFO L93 Difference]: Finished difference Result 27144 states and 83198 transitions. [2021-06-05 21:26:34,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:26:34,882 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:34,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:34,919 INFO L225 Difference]: With dead ends: 27144 [2021-06-05 21:26:34,919 INFO L226 Difference]: Without dead ends: 27144 [2021-06-05 21:26:34,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:26:34,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27144 states. [2021-06-05 21:26:35,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27144 to 25336. [2021-06-05 21:26:35,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25336 states, 25335 states have (on average 3.08656009473061) internal successors, (78198), 25335 states have internal predecessors, (78198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25336 states to 25336 states and 78198 transitions. [2021-06-05 21:26:35,327 INFO L78 Accepts]: Start accepts. Automaton has 25336 states and 78198 transitions. Word has length 22 [2021-06-05 21:26:35,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:35,327 INFO L482 AbstractCegarLoop]: Abstraction has 25336 states and 78198 transitions. [2021-06-05 21:26:35,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:35,327 INFO L276 IsEmpty]: Start isEmpty. Operand 25336 states and 78198 transitions. [2021-06-05 21:26:35,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:35,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:35,337 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:35,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9898 [2021-06-05 21:26:35,541 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:35,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:35,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1616575343, now seen corresponding path program 189 times [2021-06-05 21:26:35,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:35,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365456823] [2021-06-05 21:26:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:35,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:35,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365456823] [2021-06-05 21:26:35,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365456823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:35,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111384732] [2021-06-05 21:26:35,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:35,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:26:35,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:35,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:35,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:35,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111384732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:35,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:35,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:26:35,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231952805] [2021-06-05 21:26:35,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:35,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:35,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:35,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:35,691 INFO L87 Difference]: Start difference. First operand 25336 states and 78198 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:35,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:35,858 INFO L93 Difference]: Finished difference Result 28314 states and 86669 transitions. [2021-06-05 21:26:35,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:26:35,859 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:35,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:35,899 INFO L225 Difference]: With dead ends: 28314 [2021-06-05 21:26:35,899 INFO L226 Difference]: Without dead ends: 28314 [2021-06-05 21:26:35,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:26:35,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28314 states. [2021-06-05 21:26:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28314 to 22217. [2021-06-05 21:26:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22217 states, 22216 states have (on average 3.076026287360461) internal successors, (68337), 22216 states have internal predecessors, (68337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 68337 transitions. [2021-06-05 21:26:36,286 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 68337 transitions. Word has length 22 [2021-06-05 21:26:36,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:36,286 INFO L482 AbstractCegarLoop]: Abstraction has 22217 states and 68337 transitions. [2021-06-05 21:26:36,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:36,286 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 68337 transitions. [2021-06-05 21:26:36,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:36,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:36,297 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:36,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9899,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:36,497 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:36,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:36,498 INFO L82 PathProgramCache]: Analyzing trace with hash -444284459, now seen corresponding path program 190 times [2021-06-05 21:26:36,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:36,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649499201] [2021-06-05 21:26:36,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:36,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:36,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649499201] [2021-06-05 21:26:36,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649499201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:36,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759004153] [2021-06-05 21:26:36,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:36,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:36,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:36,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:36,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:36,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759004153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:36,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:36,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:26:36,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750399452] [2021-06-05 21:26:36,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:36,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:36,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:36,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:36,628 INFO L87 Difference]: Start difference. First operand 22217 states and 68337 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:36,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:36,830 INFO L93 Difference]: Finished difference Result 40934 states and 126275 transitions. [2021-06-05 21:26:36,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:26:36,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:36,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:36,894 INFO L225 Difference]: With dead ends: 40934 [2021-06-05 21:26:36,894 INFO L226 Difference]: Without dead ends: 40934 [2021-06-05 21:26:36,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:26:36,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40934 states. [2021-06-05 21:26:37,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40934 to 32281. [2021-06-05 21:26:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32281 states, 32280 states have (on average 3.1012391573729863) internal successors, (100108), 32280 states have internal predecessors, (100108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:37,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32281 states to 32281 states and 100108 transitions. [2021-06-05 21:26:37,615 INFO L78 Accepts]: Start accepts. Automaton has 32281 states and 100108 transitions. Word has length 22 [2021-06-05 21:26:37,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:37,615 INFO L482 AbstractCegarLoop]: Abstraction has 32281 states and 100108 transitions. [2021-06-05 21:26:37,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:37,615 INFO L276 IsEmpty]: Start isEmpty. Operand 32281 states and 100108 transitions. [2021-06-05 21:26:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:37,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:37,625 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:37,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9900,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:37,826 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:37,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:37,826 INFO L82 PathProgramCache]: Analyzing trace with hash 93571119, now seen corresponding path program 191 times [2021-06-05 21:26:37,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:37,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058780747] [2021-06-05 21:26:37,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:37,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:37,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058780747] [2021-06-05 21:26:37,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058780747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:37,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333420216] [2021-06-05 21:26:37,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:37,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:26:37,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:37,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:37,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:37,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333420216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:37,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:37,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:26:37,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423580037] [2021-06-05 21:26:37,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:37,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:37,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:37,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:37,957 INFO L87 Difference]: Start difference. First operand 32281 states and 100108 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:38,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:38,141 INFO L93 Difference]: Finished difference Result 45762 states and 141598 transitions. [2021-06-05 21:26:38,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:26:38,142 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:38,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:38,211 INFO L225 Difference]: With dead ends: 45762 [2021-06-05 21:26:38,211 INFO L226 Difference]: Without dead ends: 45762 [2021-06-05 21:26:38,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:26:38,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45762 states. [2021-06-05 21:26:38,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45762 to 45505. [2021-06-05 21:26:38,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45505 states, 45504 states have (on average 3.1023426511954995) internal successors, (141169), 45504 states have internal predecessors, (141169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:38,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45505 states to 45505 states and 141169 transitions. [2021-06-05 21:26:38,940 INFO L78 Accepts]: Start accepts. Automaton has 45505 states and 141169 transitions. Word has length 22 [2021-06-05 21:26:38,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:38,941 INFO L482 AbstractCegarLoop]: Abstraction has 45505 states and 141169 transitions. [2021-06-05 21:26:38,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:38,941 INFO L276 IsEmpty]: Start isEmpty. Operand 45505 states and 141169 transitions. [2021-06-05 21:26:38,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:38,954 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:38,954 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:39,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9901,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:39,155 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:39,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:39,155 INFO L82 PathProgramCache]: Analyzing trace with hash -412775147, now seen corresponding path program 192 times [2021-06-05 21:26:39,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:39,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797278277] [2021-06-05 21:26:39,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:39,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:39,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797278277] [2021-06-05 21:26:39,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797278277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:39,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164001711] [2021-06-05 21:26:39,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:39,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:26:39,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:39,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:39,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:39,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164001711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:39,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:39,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:26:39,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050037401] [2021-06-05 21:26:39,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:39,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:39,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:39,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:39,289 INFO L87 Difference]: Start difference. First operand 45505 states and 141169 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:39,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:39,535 INFO L93 Difference]: Finished difference Result 46432 states and 143526 transitions. [2021-06-05 21:26:39,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:26:39,535 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:39,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:39,607 INFO L225 Difference]: With dead ends: 46432 [2021-06-05 21:26:39,607 INFO L226 Difference]: Without dead ends: 46432 [2021-06-05 21:26:39,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:39,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46432 states. [2021-06-05 21:26:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46432 to 45128. [2021-06-05 21:26:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45128 states, 45127 states have (on average 3.1029317260176836) internal successors, (140026), 45127 states have internal predecessors, (140026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:40,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45128 states to 45128 states and 140026 transitions. [2021-06-05 21:26:40,504 INFO L78 Accepts]: Start accepts. Automaton has 45128 states and 140026 transitions. Word has length 22 [2021-06-05 21:26:40,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:40,504 INFO L482 AbstractCegarLoop]: Abstraction has 45128 states and 140026 transitions. [2021-06-05 21:26:40,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:40,504 INFO L276 IsEmpty]: Start isEmpty. Operand 45128 states and 140026 transitions. [2021-06-05 21:26:40,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:40,519 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:40,520 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:40,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9902,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:40,720 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:40,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:40,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1070359791, now seen corresponding path program 193 times [2021-06-05 21:26:40,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:40,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602528225] [2021-06-05 21:26:40,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:40,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:40,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602528225] [2021-06-05 21:26:40,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602528225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:40,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658666622] [2021-06-05 21:26:40,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:40,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:40,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:40,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658666622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:40,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:40,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:26:40,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429024895] [2021-06-05 21:26:40,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:40,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:40,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:40,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:40,854 INFO L87 Difference]: Start difference. First operand 45128 states and 140026 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:41,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:41,182 INFO L93 Difference]: Finished difference Result 49791 states and 153978 transitions. [2021-06-05 21:26:41,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:26:41,182 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:41,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:41,262 INFO L225 Difference]: With dead ends: 49791 [2021-06-05 21:26:41,263 INFO L226 Difference]: Without dead ends: 49791 [2021-06-05 21:26:41,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=285, Invalid=585, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:26:41,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49791 states. [2021-06-05 21:26:42,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49791 to 49280. [2021-06-05 21:26:42,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49280 states, 49279 states have (on average 3.102295095273849) internal successors, (152878), 49279 states have internal predecessors, (152878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49280 states to 49280 states and 152878 transitions. [2021-06-05 21:26:42,650 INFO L78 Accepts]: Start accepts. Automaton has 49280 states and 152878 transitions. Word has length 22 [2021-06-05 21:26:42,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:42,650 INFO L482 AbstractCegarLoop]: Abstraction has 49280 states and 152878 transitions. [2021-06-05 21:26:42,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:42,651 INFO L276 IsEmpty]: Start isEmpty. Operand 49280 states and 152878 transitions. [2021-06-05 21:26:42,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:42,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:42,665 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:42,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9903 [2021-06-05 21:26:42,866 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:42,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:42,866 INFO L82 PathProgramCache]: Analyzing trace with hash -197097387, now seen corresponding path program 194 times [2021-06-05 21:26:42,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:42,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203878055] [2021-06-05 21:26:42,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:42,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:42,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203878055] [2021-06-05 21:26:42,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203878055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:42,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846791187] [2021-06-05 21:26:42,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:42,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:42,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:42,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:42,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:43,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846791187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:43,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:43,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:26:43,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93286406] [2021-06-05 21:26:43,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:26:43,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:43,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:26:43,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:26:43,032 INFO L87 Difference]: Start difference. First operand 49280 states and 152878 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:43,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:43,533 INFO L93 Difference]: Finished difference Result 52302 states and 161626 transitions. [2021-06-05 21:26:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:26:43,534 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:43,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:43,621 INFO L225 Difference]: With dead ends: 52302 [2021-06-05 21:26:43,621 INFO L226 Difference]: Without dead ends: 52302 [2021-06-05 21:26:43,621 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 352.1ms TimeCoverageRelationStatistics Valid=525, Invalid=1035, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:26:43,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52302 states. [2021-06-05 21:26:44,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52302 to 51634. [2021-06-05 21:26:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51634 states, 51633 states have (on average 3.101311176960471) internal successors, (160130), 51633 states have internal predecessors, (160130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:44,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51634 states to 51634 states and 160130 transitions. [2021-06-05 21:26:44,717 INFO L78 Accepts]: Start accepts. Automaton has 51634 states and 160130 transitions. Word has length 22 [2021-06-05 21:26:44,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:44,717 INFO L482 AbstractCegarLoop]: Abstraction has 51634 states and 160130 transitions. [2021-06-05 21:26:44,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:44,717 INFO L276 IsEmpty]: Start isEmpty. Operand 51634 states and 160130 transitions. [2021-06-05 21:26:44,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:44,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:44,880 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:45,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9904,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:45,093 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:45,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:45,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1546669833, now seen corresponding path program 195 times [2021-06-05 21:26:45,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:45,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841671427] [2021-06-05 21:26:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:45,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:45,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841671427] [2021-06-05 21:26:45,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841671427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:45,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105840146] [2021-06-05 21:26:45,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:45,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:26:45,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:45,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:45,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:26:45,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105840146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:45,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:45,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:45,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308197863] [2021-06-05 21:26:45,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:45,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:45,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:45,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:45,217 INFO L87 Difference]: Start difference. First operand 51634 states and 160130 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:45,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:45,668 INFO L93 Difference]: Finished difference Result 52382 states and 162119 transitions. [2021-06-05 21:26:45,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:26:45,668 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:45,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:45,759 INFO L225 Difference]: With dead ends: 52382 [2021-06-05 21:26:45,760 INFO L226 Difference]: Without dead ends: 52376 [2021-06-05 21:26:45,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:26:45,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52376 states. [2021-06-05 21:26:46,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52376 to 52177. [2021-06-05 21:26:46,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52177 states, 52176 states have (on average 3.102135081263416) internal successors, (161857), 52176 states have internal predecessors, (161857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52177 states to 52177 states and 161857 transitions. [2021-06-05 21:26:46,904 INFO L78 Accepts]: Start accepts. Automaton has 52177 states and 161857 transitions. Word has length 22 [2021-06-05 21:26:46,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:46,905 INFO L482 AbstractCegarLoop]: Abstraction has 52177 states and 161857 transitions. [2021-06-05 21:26:46,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:46,905 INFO L276 IsEmpty]: Start isEmpty. Operand 52177 states and 161857 transitions. [2021-06-05 21:26:46,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:46,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:46,920 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:47,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9905 [2021-06-05 21:26:47,120 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:47,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:47,121 INFO L82 PathProgramCache]: Analyzing trace with hash 471577549, now seen corresponding path program 196 times [2021-06-05 21:26:47,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:47,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508789358] [2021-06-05 21:26:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:47,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:47,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508789358] [2021-06-05 21:26:47,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508789358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:47,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790492853] [2021-06-05 21:26:47,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:47,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:26:47,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:47,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:47,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:26:47,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790492853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:47,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:47,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:26:47,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342416253] [2021-06-05 21:26:47,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:26:47,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:47,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:26:47,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:26:47,251 INFO L87 Difference]: Start difference. First operand 52177 states and 161857 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:47,532 INFO L93 Difference]: Finished difference Result 71897 states and 222309 transitions. [2021-06-05 21:26:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:26:47,533 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:47,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:47,899 INFO L225 Difference]: With dead ends: 71897 [2021-06-05 21:26:47,900 INFO L226 Difference]: Without dead ends: 71897 [2021-06-05 21:26:47,900 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:26:47,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71897 states. [2021-06-05 21:26:48,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71897 to 70150. [2021-06-05 21:26:49,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70150 states, 70149 states have (on average 3.098347802534605) internal successors, (217346), 70149 states have internal predecessors, (217346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70150 states to 70150 states and 217346 transitions. [2021-06-05 21:26:49,210 INFO L78 Accepts]: Start accepts. Automaton has 70150 states and 217346 transitions. Word has length 22 [2021-06-05 21:26:49,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:49,211 INFO L482 AbstractCegarLoop]: Abstraction has 70150 states and 217346 transitions. [2021-06-05 21:26:49,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:49,211 INFO L276 IsEmpty]: Start isEmpty. Operand 70150 states and 217346 transitions. [2021-06-05 21:26:49,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:49,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:49,227 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:49,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9906,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:49,428 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:49,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:49,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1009433127, now seen corresponding path program 197 times [2021-06-05 21:26:49,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:49,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120814122] [2021-06-05 21:26:49,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:49,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:49,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120814122] [2021-06-05 21:26:49,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120814122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:49,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106568233] [2021-06-05 21:26:49,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:49,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:26:49,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:49,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:49,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:49,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106568233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:49,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:49,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:26:49,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414703615] [2021-06-05 21:26:49,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:49,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:49,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:49,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:49,574 INFO L87 Difference]: Start difference. First operand 70150 states and 217346 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:50,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:50,162 INFO L93 Difference]: Finished difference Result 81568 states and 251022 transitions. [2021-06-05 21:26:50,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:26:50,163 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:50,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:50,306 INFO L225 Difference]: With dead ends: 81568 [2021-06-05 21:26:50,306 INFO L226 Difference]: Without dead ends: 81568 [2021-06-05 21:26:50,306 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:26:50,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81568 states. [2021-06-05 21:26:51,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81568 to 71366. [2021-06-05 21:26:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71366 states, 71365 states have (on average 3.0934491697610875) internal successors, (220764), 71365 states have internal predecessors, (220764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71366 states to 71366 states and 220764 transitions. [2021-06-05 21:26:51,822 INFO L78 Accepts]: Start accepts. Automaton has 71366 states and 220764 transitions. Word has length 22 [2021-06-05 21:26:51,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:51,822 INFO L482 AbstractCegarLoop]: Abstraction has 71366 states and 220764 transitions. [2021-06-05 21:26:51,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 71366 states and 220764 transitions. [2021-06-05 21:26:51,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:51,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:51,838 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:52,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9907,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:52,039 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:52,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:52,039 INFO L82 PathProgramCache]: Analyzing trace with hash 503086861, now seen corresponding path program 198 times [2021-06-05 21:26:52,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:52,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366877123] [2021-06-05 21:26:52,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:52,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:52,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366877123] [2021-06-05 21:26:52,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366877123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:52,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505555696] [2021-06-05 21:26:52,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:52,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:26:52,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:52,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:52,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:52,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505555696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:52,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:52,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:26:52,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249790243] [2021-06-05 21:26:52,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:52,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:52,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:52,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:52,212 INFO L87 Difference]: Start difference. First operand 71366 states and 220764 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:53,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:53,238 INFO L93 Difference]: Finished difference Result 104720 states and 323372 transitions. [2021-06-05 21:26:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:26:53,238 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:53,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:53,471 INFO L225 Difference]: With dead ends: 104720 [2021-06-05 21:26:53,471 INFO L226 Difference]: Without dead ends: 104720 [2021-06-05 21:26:53,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:26:53,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104720 states. [2021-06-05 21:26:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104720 to 99727. [2021-06-05 21:26:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99727 states, 99726 states have (on average 3.0966046968694223) internal successors, (308812), 99726 states have internal predecessors, (308812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99727 states to 99727 states and 308812 transitions. [2021-06-05 21:26:55,722 INFO L78 Accepts]: Start accepts. Automaton has 99727 states and 308812 transitions. Word has length 22 [2021-06-05 21:26:55,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:55,722 INFO L482 AbstractCegarLoop]: Abstraction has 99727 states and 308812 transitions. [2021-06-05 21:26:55,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 99727 states and 308812 transitions. [2021-06-05 21:26:55,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:26:55,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:55,741 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:55,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9908 [2021-06-05 21:26:55,941 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:55,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:55,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1986221799, now seen corresponding path program 199 times [2021-06-05 21:26:55,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:55,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754894677] [2021-06-05 21:26:55,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:56,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:56,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754894677] [2021-06-05 21:26:56,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754894677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:56,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882490881] [2021-06-05 21:26:56,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:56,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:26:56,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:56,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882490881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:56,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:56,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:26:56,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010758123] [2021-06-05 21:26:56,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:26:56,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:56,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:26:56,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:26:56,400 INFO L87 Difference]: Start difference. First operand 99727 states and 308812 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:57,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:57,052 INFO L93 Difference]: Finished difference Result 122524 states and 378377 transitions. [2021-06-05 21:26:57,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:26:57,053 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:26:57,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:57,304 INFO L225 Difference]: With dead ends: 122524 [2021-06-05 21:26:57,304 INFO L226 Difference]: Without dead ends: 122524 [2021-06-05 21:26:57,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=382, Invalid=740, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:26:57,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122524 states. [2021-06-05 21:26:59,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122524 to 119170. [2021-06-05 21:26:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119170 states, 119169 states have (on average 3.0954358935629234) internal successors, (368880), 119169 states have internal predecessors, (368880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:00,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119170 states to 119170 states and 368880 transitions. [2021-06-05 21:27:00,490 INFO L78 Accepts]: Start accepts. Automaton has 119170 states and 368880 transitions. Word has length 22 [2021-06-05 21:27:00,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:00,490 INFO L482 AbstractCegarLoop]: Abstraction has 119170 states and 368880 transitions. [2021-06-05 21:27:00,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:00,490 INFO L276 IsEmpty]: Start isEmpty. Operand 119170 states and 368880 transitions. [2021-06-05 21:27:00,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:00,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:00,513 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:00,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9909,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:00,729 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:00,729 INFO L82 PathProgramCache]: Analyzing trace with hash -2047516429, now seen corresponding path program 200 times [2021-06-05 21:27:00,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:00,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073161882] [2021-06-05 21:27:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:00,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:00,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073161882] [2021-06-05 21:27:00,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073161882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:00,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97818920] [2021-06-05 21:27:00,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:00,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:27:00,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:00,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:00,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:00,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97818920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:00,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:00,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:27:00,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290671536] [2021-06-05 21:27:00,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:27:00,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:00,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:27:00,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:27:00,863 INFO L87 Difference]: Start difference. First operand 119170 states and 368880 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:01,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:01,493 INFO L93 Difference]: Finished difference Result 149360 states and 458856 transitions. [2021-06-05 21:27:01,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:27:01,494 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:02,259 INFO L225 Difference]: With dead ends: 149360 [2021-06-05 21:27:02,259 INFO L226 Difference]: Without dead ends: 149360 [2021-06-05 21:27:02,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 140.0ms TimeCoverageRelationStatistics Valid=265, Invalid=491, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:27:02,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149360 states. [2021-06-05 21:27:03,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149360 to 66855. [2021-06-05 21:27:03,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66855 states, 66854 states have (on average 3.0857241152361863) internal successors, (206293), 66854 states have internal predecessors, (206293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66855 states to 66855 states and 206293 transitions. [2021-06-05 21:27:04,173 INFO L78 Accepts]: Start accepts. Automaton has 66855 states and 206293 transitions. Word has length 22 [2021-06-05 21:27:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:04,173 INFO L482 AbstractCegarLoop]: Abstraction has 66855 states and 206293 transitions. [2021-06-05 21:27:04,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:04,413 INFO L276 IsEmpty]: Start isEmpty. Operand 66855 states and 206293 transitions. [2021-06-05 21:27:04,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:04,433 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:04,433 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:04,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9910,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:04,648 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:04,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:04,648 INFO L82 PathProgramCache]: Analyzing trace with hash -564381491, now seen corresponding path program 201 times [2021-06-05 21:27:04,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:04,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8583023] [2021-06-05 21:27:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:04,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:04,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8583023] [2021-06-05 21:27:04,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8583023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:04,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334151042] [2021-06-05 21:27:04,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:04,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:27:04,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:04,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:04,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:04,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334151042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:04,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:04,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:27:04,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137815669] [2021-06-05 21:27:04,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:27:04,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:04,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:27:04,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:27:04,782 INFO L87 Difference]: Start difference. First operand 66855 states and 206293 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:05,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:05,272 INFO L93 Difference]: Finished difference Result 89497 states and 274720 transitions. [2021-06-05 21:27:05,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:27:05,272 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:05,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:05,453 INFO L225 Difference]: With dead ends: 89497 [2021-06-05 21:27:05,453 INFO L226 Difference]: Without dead ends: 89497 [2021-06-05 21:27:05,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=409, Invalid=781, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:27:05,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89497 states. [2021-06-05 21:27:06,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89497 to 43123. [2021-06-05 21:27:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43123 states, 43122 states have (on average 3.0917397152265664) internal successors, (133322), 43122 states have internal predecessors, (133322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:06,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43123 states to 43123 states and 133322 transitions. [2021-06-05 21:27:06,693 INFO L78 Accepts]: Start accepts. Automaton has 43123 states and 133322 transitions. Word has length 22 [2021-06-05 21:27:06,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:06,693 INFO L482 AbstractCegarLoop]: Abstraction has 43123 states and 133322 transitions. [2021-06-05 21:27:06,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:06,694 INFO L276 IsEmpty]: Start isEmpty. Operand 43123 states and 133322 transitions. [2021-06-05 21:27:06,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:06,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:06,705 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:06,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9911,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:06,906 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:06,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:06,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1579474701, now seen corresponding path program 202 times [2021-06-05 21:27:06,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:06,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629520683] [2021-06-05 21:27:06,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:06,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:06,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629520683] [2021-06-05 21:27:06,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629520683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:06,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067070809] [2021-06-05 21:27:06,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:06,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:27:06,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:06,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:06,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:07,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067070809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:07,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:07,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:27:07,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69490719] [2021-06-05 21:27:07,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:27:07,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:07,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:27:07,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:27:07,030 INFO L87 Difference]: Start difference. First operand 43123 states and 133322 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:07,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:07,253 INFO L93 Difference]: Finished difference Result 46015 states and 141473 transitions. [2021-06-05 21:27:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:27:07,253 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:07,508 INFO L225 Difference]: With dead ends: 46015 [2021-06-05 21:27:07,508 INFO L226 Difference]: Without dead ends: 46015 [2021-06-05 21:27:07,509 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:27:07,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46015 states. [2021-06-05 21:27:07,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46015 to 33259. [2021-06-05 21:27:08,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33259 states, 33258 states have (on average 3.08671597811053) internal successors, (102658), 33258 states have internal predecessors, (102658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:08,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33259 states to 33259 states and 102658 transitions. [2021-06-05 21:27:08,076 INFO L78 Accepts]: Start accepts. Automaton has 33259 states and 102658 transitions. Word has length 22 [2021-06-05 21:27:08,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:08,076 INFO L482 AbstractCegarLoop]: Abstraction has 33259 states and 102658 transitions. [2021-06-05 21:27:08,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:08,076 INFO L276 IsEmpty]: Start isEmpty. Operand 33259 states and 102658 transitions. [2021-06-05 21:27:08,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:08,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:08,085 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:08,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9912,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:08,286 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:08,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:08,286 INFO L82 PathProgramCache]: Analyzing trace with hash 2117330279, now seen corresponding path program 203 times [2021-06-05 21:27:08,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:08,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368292625] [2021-06-05 21:27:08,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:27:08,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:08,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368292625] [2021-06-05 21:27:08,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368292625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:08,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369370180] [2021-06-05 21:27:08,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:08,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:27:08,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:08,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:08,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:27:08,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369370180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:08,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:08,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:27:08,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267740063] [2021-06-05 21:27:08,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:27:08,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:08,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:27:08,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:27:08,412 INFO L87 Difference]: Start difference. First operand 33259 states and 102658 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:08,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:08,773 INFO L93 Difference]: Finished difference Result 35745 states and 109875 transitions. [2021-06-05 21:27:08,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:27:08,774 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:08,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:08,822 INFO L225 Difference]: With dead ends: 35745 [2021-06-05 21:27:08,822 INFO L226 Difference]: Without dead ends: 35745 [2021-06-05 21:27:08,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:27:08,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35745 states. [2021-06-05 21:27:09,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35745 to 35523. [2021-06-05 21:27:09,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35523 states, 35522 states have (on average 3.083694611789877) internal successors, (109539), 35522 states have internal predecessors, (109539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35523 states to 35523 states and 109539 transitions. [2021-06-05 21:27:09,424 INFO L78 Accepts]: Start accepts. Automaton has 35523 states and 109539 transitions. Word has length 22 [2021-06-05 21:27:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:09,424 INFO L482 AbstractCegarLoop]: Abstraction has 35523 states and 109539 transitions. [2021-06-05 21:27:09,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:09,424 INFO L276 IsEmpty]: Start isEmpty. Operand 35523 states and 109539 transitions. [2021-06-05 21:27:09,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:09,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:09,434 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:09,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9913,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:09,635 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:09,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:09,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1610984013, now seen corresponding path program 204 times [2021-06-05 21:27:09,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:09,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958342553] [2021-06-05 21:27:09,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:09,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:09,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958342553] [2021-06-05 21:27:09,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958342553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:09,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402053370] [2021-06-05 21:27:09,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:09,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:27:09,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:09,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:09,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:09,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402053370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:09,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:09,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:27:09,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147866834] [2021-06-05 21:27:09,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:27:09,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:09,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:27:09,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:27:09,770 INFO L87 Difference]: Start difference. First operand 35523 states and 109539 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:09,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:09,985 INFO L93 Difference]: Finished difference Result 36167 states and 111049 transitions. [2021-06-05 21:27:09,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:27:09,986 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:09,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:10,194 INFO L225 Difference]: With dead ends: 36167 [2021-06-05 21:27:10,194 INFO L226 Difference]: Without dead ends: 36167 [2021-06-05 21:27:10,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:27:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36167 states. [2021-06-05 21:27:10,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36167 to 33964. [2021-06-05 21:27:10,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33964 states, 33963 states have (on average 3.083973736124606) internal successors, (104741), 33963 states have internal predecessors, (104741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:10,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33964 states to 33964 states and 104741 transitions. [2021-06-05 21:27:10,653 INFO L78 Accepts]: Start accepts. Automaton has 33964 states and 104741 transitions. Word has length 22 [2021-06-05 21:27:10,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:10,653 INFO L482 AbstractCegarLoop]: Abstraction has 33964 states and 104741 transitions. [2021-06-05 21:27:10,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:10,653 INFO L276 IsEmpty]: Start isEmpty. Operand 33964 states and 104741 transitions. [2021-06-05 21:27:10,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:10,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:10,662 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:10,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9914,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:10,863 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:10,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:10,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1200848345, now seen corresponding path program 205 times [2021-06-05 21:27:10,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:10,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914712034] [2021-06-05 21:27:10,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:10,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:10,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914712034] [2021-06-05 21:27:10,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914712034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:10,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795104289] [2021-06-05 21:27:10,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:10,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:10,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:10,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795104289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:10,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:10,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:27:10,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362553325] [2021-06-05 21:27:10,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:27:10,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:10,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:27:10,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:27:10,995 INFO L87 Difference]: Start difference. First operand 33964 states and 104741 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:11,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:11,249 INFO L93 Difference]: Finished difference Result 36419 states and 111773 transitions. [2021-06-05 21:27:11,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:27:11,250 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:11,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:11,300 INFO L225 Difference]: With dead ends: 36419 [2021-06-05 21:27:11,301 INFO L226 Difference]: Without dead ends: 36419 [2021-06-05 21:27:11,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=284, Invalid=586, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:27:11,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36419 states. [2021-06-05 21:27:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36419 to 34818. [2021-06-05 21:27:11,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34818 states, 34817 states have (on average 3.083206479593302) internal successors, (107348), 34817 states have internal predecessors, (107348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:11,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34818 states to 34818 states and 107348 transitions. [2021-06-05 21:27:11,944 INFO L78 Accepts]: Start accepts. Automaton has 34818 states and 107348 transitions. Word has length 22 [2021-06-05 21:27:11,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:11,944 INFO L482 AbstractCegarLoop]: Abstraction has 34818 states and 107348 transitions. [2021-06-05 21:27:11,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:11,944 INFO L276 IsEmpty]: Start isEmpty. Operand 34818 states and 107348 transitions. [2021-06-05 21:27:11,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:11,954 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:11,954 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:12,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9915 [2021-06-05 21:27:12,154 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:12,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:12,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1826661773, now seen corresponding path program 206 times [2021-06-05 21:27:12,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:12,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369495837] [2021-06-05 21:27:12,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:12,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:12,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369495837] [2021-06-05 21:27:12,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369495837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:12,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667880416] [2021-06-05 21:27:12,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:12,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:27:12,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:12,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:12,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:12,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667880416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:12,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:12,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:27:12,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031790401] [2021-06-05 21:27:12,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:27:12,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:12,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:27:12,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:27:12,292 INFO L87 Difference]: Start difference. First operand 34818 states and 107348 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:12,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:12,654 INFO L93 Difference]: Finished difference Result 36428 states and 111724 transitions. [2021-06-05 21:27:12,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:27:12,654 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:12,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:12,707 INFO L225 Difference]: With dead ends: 36428 [2021-06-05 21:27:12,707 INFO L226 Difference]: Without dead ends: 36428 [2021-06-05 21:27:12,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 250.7ms TimeCoverageRelationStatistics Valid=524, Invalid=1036, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:27:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36428 states. [2021-06-05 21:27:13,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36428 to 34194. [2021-06-05 21:27:13,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 3.0853683502471267) internal successors, (105498), 34193 states have internal predecessors, (105498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:13,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 105498 transitions. [2021-06-05 21:27:13,317 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 105498 transitions. Word has length 22 [2021-06-05 21:27:13,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:13,317 INFO L482 AbstractCegarLoop]: Abstraction has 34194 states and 105498 transitions. [2021-06-05 21:27:13,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:13,317 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 105498 transitions. [2021-06-05 21:27:13,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:13,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:13,326 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:13,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9916,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:13,527 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:13,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:13,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1663098905, now seen corresponding path program 207 times [2021-06-05 21:27:13,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:13,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501726848] [2021-06-05 21:27:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:27:13,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:13,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501726848] [2021-06-05 21:27:13,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501726848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:13,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777226737] [2021-06-05 21:27:13,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:13,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:27:13,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:13,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:13,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:27:13,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777226737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:13,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:13,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:27:13,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722737861] [2021-06-05 21:27:13,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:27:13,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:13,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:27:13,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:27:13,634 INFO L87 Difference]: Start difference. First operand 34194 states and 105498 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:13,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:13,876 INFO L93 Difference]: Finished difference Result 34348 states and 105669 transitions. [2021-06-05 21:27:13,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:27:13,876 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:13,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:13,928 INFO L225 Difference]: With dead ends: 34348 [2021-06-05 21:27:13,928 INFO L226 Difference]: Without dead ends: 34344 [2021-06-05 21:27:13,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:27:13,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34344 states. [2021-06-05 21:27:14,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34344 to 34194. [2021-06-05 21:27:14,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 3.0853098587430177) internal successors, (105496), 34193 states have internal predecessors, (105496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 105496 transitions. [2021-06-05 21:27:14,613 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 105496 transitions. Word has length 22 [2021-06-05 21:27:14,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:14,614 INFO L482 AbstractCegarLoop]: Abstraction has 34194 states and 105496 transitions. [2021-06-05 21:27:14,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:14,614 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 105496 transitions. [2021-06-05 21:27:14,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:14,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:14,623 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:14,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9917 [2021-06-05 21:27:14,823 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:14,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:14,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1971295143, now seen corresponding path program 208 times [2021-06-05 21:27:14,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:14,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876350741] [2021-06-05 21:27:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:14,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:14,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876350741] [2021-06-05 21:27:14,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876350741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:14,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819182922] [2021-06-05 21:27:14,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:14,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:27:14,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:14,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:14,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:14,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819182922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:14,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:14,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:27:14,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583115860] [2021-06-05 21:27:14,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:27:14,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:14,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:27:14,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:27:14,963 INFO L87 Difference]: Start difference. First operand 34194 states and 105496 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:15,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:15,268 INFO L93 Difference]: Finished difference Result 37342 states and 114450 transitions. [2021-06-05 21:27:15,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:27:15,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:15,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:15,350 INFO L225 Difference]: With dead ends: 37342 [2021-06-05 21:27:15,351 INFO L226 Difference]: Without dead ends: 37342 [2021-06-05 21:27:15,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 199.5ms TimeCoverageRelationStatistics Valid=415, Invalid=775, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:27:15,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37342 states. [2021-06-05 21:27:15,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37342 to 32084. [2021-06-05 21:27:15,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32084 states, 32083 states have (on average 3.0869307733067357) internal successors, (99038), 32083 states have internal predecessors, (99038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:15,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32084 states to 32084 states and 99038 transitions. [2021-06-05 21:27:15,991 INFO L78 Accepts]: Start accepts. Automaton has 32084 states and 99038 transitions. Word has length 22 [2021-06-05 21:27:15,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:15,991 INFO L482 AbstractCegarLoop]: Abstraction has 32084 states and 99038 transitions. [2021-06-05 21:27:15,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:15,991 INFO L276 IsEmpty]: Start isEmpty. Operand 32084 states and 99038 transitions. [2021-06-05 21:27:15,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:15,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:15,999 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:16,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9918 [2021-06-05 21:27:16,200 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:16,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:16,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1334828289, now seen corresponding path program 209 times [2021-06-05 21:27:16,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:16,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214004577] [2021-06-05 21:27:16,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:16,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:16,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214004577] [2021-06-05 21:27:16,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214004577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:16,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171354299] [2021-06-05 21:27:16,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:16,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:27:16,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:16,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:16,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:16,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171354299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:16,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:16,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:27:16,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596463154] [2021-06-05 21:27:16,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:27:16,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:16,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:27:16,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:27:16,343 INFO L87 Difference]: Start difference. First operand 32084 states and 99038 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:16,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:16,611 INFO L93 Difference]: Finished difference Result 32697 states and 100396 transitions. [2021-06-05 21:27:16,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:27:16,612 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:16,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:16,658 INFO L225 Difference]: With dead ends: 32697 [2021-06-05 21:27:16,658 INFO L226 Difference]: Without dead ends: 32697 [2021-06-05 21:27:16,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=343, Invalid=649, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:27:16,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32697 states. [2021-06-05 21:27:17,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32697 to 31320. [2021-06-05 21:27:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31320 states, 31319 states have (on average 3.0872313930840702) internal successors, (96689), 31319 states have internal predecessors, (96689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:17,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31320 states to 31320 states and 96689 transitions. [2021-06-05 21:27:17,347 INFO L78 Accepts]: Start accepts. Automaton has 31320 states and 96689 transitions. Word has length 22 [2021-06-05 21:27:17,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:17,347 INFO L482 AbstractCegarLoop]: Abstraction has 31320 states and 96689 transitions. [2021-06-05 21:27:17,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:17,347 INFO L276 IsEmpty]: Start isEmpty. Operand 31320 states and 96689 transitions. [2021-06-05 21:27:17,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:17,355 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:17,355 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:17,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9919,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:17,557 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:17,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:17,557 INFO L82 PathProgramCache]: Analyzing trace with hash 67371111, now seen corresponding path program 210 times [2021-06-05 21:27:17,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:17,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872908575] [2021-06-05 21:27:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:17,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:17,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872908575] [2021-06-05 21:27:17,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872908575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:17,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784309081] [2021-06-05 21:27:17,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:17,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:27:17,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:17,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:17,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:17,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784309081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:17,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:17,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:27:17,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800791961] [2021-06-05 21:27:17,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:27:17,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:17,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:27:17,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:27:17,702 INFO L87 Difference]: Start difference. First operand 31320 states and 96689 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:18,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:18,055 INFO L93 Difference]: Finished difference Result 33049 states and 101433 transitions. [2021-06-05 21:27:18,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:27:18,055 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:18,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:18,102 INFO L225 Difference]: With dead ends: 33049 [2021-06-05 21:27:18,102 INFO L226 Difference]: Without dead ends: 33049 [2021-06-05 21:27:18,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 260.0ms TimeCoverageRelationStatistics Valid=561, Invalid=1079, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:27:18,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33049 states. [2021-06-05 21:27:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33049 to 30873. [2021-06-05 21:27:18,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30873 states, 30872 states have (on average 3.089045089401399) internal successors, (95365), 30872 states have internal predecessors, (95365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:18,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30873 states to 30873 states and 95365 transitions. [2021-06-05 21:27:18,782 INFO L78 Accepts]: Start accepts. Automaton has 30873 states and 95365 transitions. Word has length 22 [2021-06-05 21:27:18,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:18,782 INFO L482 AbstractCegarLoop]: Abstraction has 30873 states and 95365 transitions. [2021-06-05 21:27:18,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:18,783 INFO L276 IsEmpty]: Start isEmpty. Operand 30873 states and 95365 transitions. [2021-06-05 21:27:18,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:18,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:18,790 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:18,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9920 [2021-06-05 21:27:18,991 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:18,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:18,991 INFO L82 PathProgramCache]: Analyzing trace with hash -658261175, now seen corresponding path program 211 times [2021-06-05 21:27:18,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:18,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815257097] [2021-06-05 21:27:18,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:19,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:19,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815257097] [2021-06-05 21:27:19,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815257097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:19,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212819594] [2021-06-05 21:27:19,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:19,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:19,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:27:19,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212819594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:19,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:19,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:27:19,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064100230] [2021-06-05 21:27:19,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:27:19,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:19,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:27:19,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:27:19,104 INFO L87 Difference]: Start difference. First operand 30873 states and 95365 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:19,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:19,327 INFO L93 Difference]: Finished difference Result 31092 states and 95691 transitions. [2021-06-05 21:27:19,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:27:19,328 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:19,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:19,372 INFO L225 Difference]: With dead ends: 31092 [2021-06-05 21:27:19,372 INFO L226 Difference]: Without dead ends: 31088 [2021-06-05 21:27:19,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:27:19,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31088 states. [2021-06-05 21:27:19,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31088 to 30908. [2021-06-05 21:27:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30908 states, 30907 states have (on average 3.088588345682208) internal successors, (95459), 30907 states have internal predecessors, (95459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30908 states to 30908 states and 95459 transitions. [2021-06-05 21:27:19,987 INFO L78 Accepts]: Start accepts. Automaton has 30908 states and 95459 transitions. Word has length 22 [2021-06-05 21:27:19,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:19,987 INFO L482 AbstractCegarLoop]: Abstraction has 30908 states and 95459 transitions. [2021-06-05 21:27:19,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:19,987 INFO L276 IsEmpty]: Start isEmpty. Operand 30908 states and 95459 transitions. [2021-06-05 21:27:19,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:19,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:19,995 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:20,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9921,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:20,196 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:20,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:20,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1059487885, now seen corresponding path program 212 times [2021-06-05 21:27:20,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:20,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705797476] [2021-06-05 21:27:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:20,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:20,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705797476] [2021-06-05 21:27:20,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705797476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:20,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329413682] [2021-06-05 21:27:20,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:20,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:27:20,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:20,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:20,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:20,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329413682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:20,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:20,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:27:20,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269136694] [2021-06-05 21:27:20,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:27:20,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:20,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:27:20,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:27:20,322 INFO L87 Difference]: Start difference. First operand 30908 states and 95459 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:20,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:20,507 INFO L93 Difference]: Finished difference Result 31582 states and 97082 transitions. [2021-06-05 21:27:20,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:27:20,508 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:20,556 INFO L225 Difference]: With dead ends: 31582 [2021-06-05 21:27:20,556 INFO L226 Difference]: Without dead ends: 31582 [2021-06-05 21:27:20,557 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:27:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31582 states. [2021-06-05 21:27:20,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31582 to 30923. [2021-06-05 21:27:20,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30923 states, 30922 states have (on average 3.0885130327921866) internal successors, (95503), 30922 states have internal predecessors, (95503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30923 states to 30923 states and 95503 transitions. [2021-06-05 21:27:21,026 INFO L78 Accepts]: Start accepts. Automaton has 30923 states and 95503 transitions. Word has length 22 [2021-06-05 21:27:21,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:21,026 INFO L482 AbstractCegarLoop]: Abstraction has 30923 states and 95503 transitions. [2021-06-05 21:27:21,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:21,026 INFO L276 IsEmpty]: Start isEmpty. Operand 30923 states and 95503 transitions. [2021-06-05 21:27:21,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:21,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:21,034 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:21,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9922,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:21,234 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:21,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:21,235 INFO L82 PathProgramCache]: Analyzing trace with hash -669559449, now seen corresponding path program 213 times [2021-06-05 21:27:21,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:21,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416971612] [2021-06-05 21:27:21,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:27:21,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:21,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416971612] [2021-06-05 21:27:21,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416971612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:21,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242839678] [2021-06-05 21:27:21,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:21,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:27:21,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:21,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:21,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:27:21,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242839678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:21,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:21,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:27:21,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459867748] [2021-06-05 21:27:21,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:27:21,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:21,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:27:21,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:27:21,635 INFO L87 Difference]: Start difference. First operand 30923 states and 95503 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:21,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:21,828 INFO L93 Difference]: Finished difference Result 31896 states and 97991 transitions. [2021-06-05 21:27:21,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:27:21,829 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:21,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:21,874 INFO L225 Difference]: With dead ends: 31896 [2021-06-05 21:27:21,874 INFO L226 Difference]: Without dead ends: 31896 [2021-06-05 21:27:21,874 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=193, Invalid=313, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:27:21,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31896 states. [2021-06-05 21:27:22,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31896 to 30949. [2021-06-05 21:27:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30949 states, 30948 states have (on average 3.0883094222566885) internal successors, (95577), 30948 states have internal predecessors, (95577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:22,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30949 states to 30949 states and 95577 transitions. [2021-06-05 21:27:22,334 INFO L78 Accepts]: Start accepts. Automaton has 30949 states and 95577 transitions. Word has length 22 [2021-06-05 21:27:22,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:22,334 INFO L482 AbstractCegarLoop]: Abstraction has 30949 states and 95577 transitions. [2021-06-05 21:27:22,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:22,334 INFO L276 IsEmpty]: Start isEmpty. Operand 30949 states and 95577 transitions. [2021-06-05 21:27:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:22,342 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:22,342 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:22,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9923,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:22,542 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:22,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:22,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1564548045, now seen corresponding path program 214 times [2021-06-05 21:27:22,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:22,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090055977] [2021-06-05 21:27:22,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:22,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:22,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090055977] [2021-06-05 21:27:22,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090055977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:22,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110937946] [2021-06-05 21:27:22,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:22,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:27:22,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:22,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:22,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:22,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110937946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:22,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:22,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:27:22,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987623240] [2021-06-05 21:27:22,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:27:22,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:22,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:27:22,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:27:22,673 INFO L87 Difference]: Start difference. First operand 30949 states and 95577 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:23,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:23,070 INFO L93 Difference]: Finished difference Result 31958 states and 98178 transitions. [2021-06-05 21:27:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:27:23,070 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:23,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:23,108 INFO L225 Difference]: With dead ends: 31958 [2021-06-05 21:27:23,108 INFO L226 Difference]: Without dead ends: 31958 [2021-06-05 21:27:23,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:27:23,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31958 states. [2021-06-05 21:27:23,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31958 to 30995. [2021-06-05 21:27:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30995 states, 30994 states have (on average 3.0880170355552687) internal successors, (95710), 30994 states have internal predecessors, (95710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:23,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30995 states to 30995 states and 95710 transitions. [2021-06-05 21:27:23,547 INFO L78 Accepts]: Start accepts. Automaton has 30995 states and 95710 transitions. Word has length 22 [2021-06-05 21:27:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:23,547 INFO L482 AbstractCegarLoop]: Abstraction has 30995 states and 95710 transitions. [2021-06-05 21:27:23,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:23,547 INFO L276 IsEmpty]: Start isEmpty. Operand 30995 states and 95710 transitions. [2021-06-05 21:27:23,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:23,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:23,555 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:23,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9924,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:23,756 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:23,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:23,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2102403623, now seen corresponding path program 215 times [2021-06-05 21:27:23,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:23,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266521237] [2021-06-05 21:27:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:23,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:23,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266521237] [2021-06-05 21:27:23,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266521237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:23,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972717336] [2021-06-05 21:27:23,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:23,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:27:23,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:23,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:23,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:23,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972717336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:23,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:23,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:27:23,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220573959] [2021-06-05 21:27:23,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:27:23,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:23,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:27:23,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:27:23,890 INFO L87 Difference]: Start difference. First operand 30995 states and 95710 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:24,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:24,100 INFO L93 Difference]: Finished difference Result 36047 states and 110795 transitions. [2021-06-05 21:27:24,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:27:24,100 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:24,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:24,152 INFO L225 Difference]: With dead ends: 36047 [2021-06-05 21:27:24,152 INFO L226 Difference]: Without dead ends: 36047 [2021-06-05 21:27:24,152 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:27:24,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36047 states. [2021-06-05 21:27:24,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36047 to 35338. [2021-06-05 21:27:24,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35338 states, 35337 states have (on average 3.0890001980926507) internal successors, (109156), 35337 states have internal predecessors, (109156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35338 states to 35338 states and 109156 transitions. [2021-06-05 21:27:24,793 INFO L78 Accepts]: Start accepts. Automaton has 35338 states and 109156 transitions. Word has length 22 [2021-06-05 21:27:24,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:24,793 INFO L482 AbstractCegarLoop]: Abstraction has 35338 states and 109156 transitions. [2021-06-05 21:27:24,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:24,793 INFO L276 IsEmpty]: Start isEmpty. Operand 35338 states and 109156 transitions. [2021-06-05 21:27:24,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:24,802 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:24,802 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:25,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9925 [2021-06-05 21:27:25,002 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:25,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:25,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1596057357, now seen corresponding path program 216 times [2021-06-05 21:27:25,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:25,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417577291] [2021-06-05 21:27:25,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:27:25,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:25,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417577291] [2021-06-05 21:27:25,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417577291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:25,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332135365] [2021-06-05 21:27:25,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:25,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:27:25,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:25,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:25,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:27:25,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332135365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:25,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:25,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:27:25,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915899433] [2021-06-05 21:27:25,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:27:25,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:25,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:27:25,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:27:25,139 INFO L87 Difference]: Start difference. First operand 35338 states and 109156 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:25,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:25,320 INFO L93 Difference]: Finished difference Result 39264 states and 120741 transitions. [2021-06-05 21:27:25,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:27:25,321 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:25,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:25,378 INFO L225 Difference]: With dead ends: 39264 [2021-06-05 21:27:25,378 INFO L226 Difference]: Without dead ends: 39264 [2021-06-05 21:27:25,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:27:25,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39264 states. [2021-06-05 21:27:26,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39264 to 38914. [2021-06-05 21:27:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38914 states, 38913 states have (on average 3.083982216739907) internal successors, (120007), 38913 states have internal predecessors, (120007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:26,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38914 states to 38914 states and 120007 transitions. [2021-06-05 21:27:26,126 INFO L78 Accepts]: Start accepts. Automaton has 38914 states and 120007 transitions. Word has length 22 [2021-06-05 21:27:26,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:26,126 INFO L482 AbstractCegarLoop]: Abstraction has 38914 states and 120007 transitions. [2021-06-05 21:27:26,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:26,126 INFO L276 IsEmpty]: Start isEmpty. Operand 38914 states and 120007 transitions. [2021-06-05 21:27:26,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:26,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:26,137 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:26,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9926,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:26,337 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:26,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:26,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1215775001, now seen corresponding path program 217 times [2021-06-05 21:27:26,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:26,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398032870] [2021-06-05 21:27:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:26,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:26,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398032870] [2021-06-05 21:27:26,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398032870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:26,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032518018] [2021-06-05 21:27:26,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:26,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:26,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:26,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032518018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:26,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:26,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:27:26,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699483612] [2021-06-05 21:27:26,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:27:26,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:26,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:27:26,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:27:26,480 INFO L87 Difference]: Start difference. First operand 38914 states and 120007 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:26,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:26,722 INFO L93 Difference]: Finished difference Result 39365 states and 121002 transitions. [2021-06-05 21:27:26,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:27:26,722 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:26,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:26,778 INFO L225 Difference]: With dead ends: 39365 [2021-06-05 21:27:26,778 INFO L226 Difference]: Without dead ends: 39365 [2021-06-05 21:27:26,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:27:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39365 states. [2021-06-05 21:27:27,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39365 to 38918. [2021-06-05 21:27:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38918 states, 38917 states have (on average 3.0839735848086955) internal successors, (120019), 38917 states have internal predecessors, (120019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:27,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38918 states to 38918 states and 120019 transitions. [2021-06-05 21:27:27,614 INFO L78 Accepts]: Start accepts. Automaton has 38918 states and 120019 transitions. Word has length 22 [2021-06-05 21:27:27,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:27,614 INFO L482 AbstractCegarLoop]: Abstraction has 38918 states and 120019 transitions. [2021-06-05 21:27:27,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:27,614 INFO L276 IsEmpty]: Start isEmpty. Operand 38918 states and 120019 transitions. [2021-06-05 21:27:27,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:27,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:27,625 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:27,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9927 [2021-06-05 21:27:27,825 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:27,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1811735117, now seen corresponding path program 218 times [2021-06-05 21:27:27,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:27,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476930037] [2021-06-05 21:27:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:27,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:27,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476930037] [2021-06-05 21:27:27,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476930037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:27,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731301125] [2021-06-05 21:27:27,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:27,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:27:27,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:27,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:27,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:27,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731301125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:27,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:27,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:27:27,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838559487] [2021-06-05 21:27:27,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:27:27,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:27,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:27:27,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:27:27,970 INFO L87 Difference]: Start difference. First operand 38918 states and 120019 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:28,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:28,307 INFO L93 Difference]: Finished difference Result 40630 states and 124791 transitions. [2021-06-05 21:27:28,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:27:28,308 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:28,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:28,374 INFO L225 Difference]: With dead ends: 40630 [2021-06-05 21:27:28,374 INFO L226 Difference]: Without dead ends: 40630 [2021-06-05 21:27:28,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:27:28,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40630 states. [2021-06-05 21:27:29,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40630 to 40219. [2021-06-05 21:27:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40219 states, 40218 states have (on average 3.082301457059028) internal successors, (123964), 40218 states have internal predecessors, (123964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:29,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40219 states to 40219 states and 123964 transitions. [2021-06-05 21:27:29,263 INFO L78 Accepts]: Start accepts. Automaton has 40219 states and 123964 transitions. Word has length 22 [2021-06-05 21:27:29,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:29,263 INFO L482 AbstractCegarLoop]: Abstraction has 40219 states and 123964 transitions. [2021-06-05 21:27:29,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:29,263 INFO L276 IsEmpty]: Start isEmpty. Operand 40219 states and 123964 transitions. [2021-06-05 21:27:29,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:29,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:29,274 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:29,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9928,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:29,474 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:29,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:29,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1175268263, now seen corresponding path program 219 times [2021-06-05 21:27:29,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:29,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702112971] [2021-06-05 21:27:29,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:29,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:29,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702112971] [2021-06-05 21:27:29,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702112971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:29,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316438372] [2021-06-05 21:27:29,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:29,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:27:29,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:29,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:29,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:29,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316438372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:29,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:29,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:27:29,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934151873] [2021-06-05 21:27:29,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:27:29,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:29,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:27:29,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:27:29,695 INFO L87 Difference]: Start difference. First operand 40219 states and 123964 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:30,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:30,186 INFO L93 Difference]: Finished difference Result 42248 states and 129555 transitions. [2021-06-05 21:27:30,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 21:27:30,187 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:30,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:30,248 INFO L225 Difference]: With dead ends: 42248 [2021-06-05 21:27:30,248 INFO L226 Difference]: Without dead ends: 42248 [2021-06-05 21:27:30,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 381.8ms TimeCoverageRelationStatistics Valid=665, Invalid=1315, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:27:30,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42248 states. [2021-06-05 21:27:30,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42248 to 41433. [2021-06-05 21:27:30,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41433 states, 41432 states have (on average 3.080614018150222) internal successors, (127636), 41432 states have internal predecessors, (127636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:31,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41433 states to 41433 states and 127636 transitions. [2021-06-05 21:27:31,080 INFO L78 Accepts]: Start accepts. Automaton has 41433 states and 127636 transitions. Word has length 22 [2021-06-05 21:27:31,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:31,080 INFO L482 AbstractCegarLoop]: Abstraction has 41433 states and 127636 transitions. [2021-06-05 21:27:31,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:31,080 INFO L276 IsEmpty]: Start isEmpty. Operand 41433 states and 127636 transitions. [2021-06-05 21:27:31,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:31,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:31,091 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:31,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9929,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:31,292 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:31,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:31,292 INFO L82 PathProgramCache]: Analyzing trace with hash -141305647, now seen corresponding path program 220 times [2021-06-05 21:27:31,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:31,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044811111] [2021-06-05 21:27:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:31,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:31,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044811111] [2021-06-05 21:27:31,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044811111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:31,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086586840] [2021-06-05 21:27:31,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:31,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:27:31,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:31,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:31,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:27:31,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086586840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:31,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:31,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:27:31,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268115824] [2021-06-05 21:27:31,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:27:31,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:31,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:27:31,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:27:31,415 INFO L87 Difference]: Start difference. First operand 41433 states and 127636 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:32,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:32,015 INFO L93 Difference]: Finished difference Result 41740 states and 128184 transitions. [2021-06-05 21:27:32,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:27:32,016 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:32,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:32,079 INFO L225 Difference]: With dead ends: 41740 [2021-06-05 21:27:32,079 INFO L226 Difference]: Without dead ends: 41734 [2021-06-05 21:27:32,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:27:32,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41734 states. [2021-06-05 21:27:32,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41734 to 40967. [2021-06-05 21:27:32,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40967 states, 40966 states have (on average 3.0791632085143776) internal successors, (126141), 40966 states have internal predecessors, (126141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:32,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40967 states to 40967 states and 126141 transitions. [2021-06-05 21:27:32,694 INFO L78 Accepts]: Start accepts. Automaton has 40967 states and 126141 transitions. Word has length 22 [2021-06-05 21:27:32,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:32,694 INFO L482 AbstractCegarLoop]: Abstraction has 40967 states and 126141 transitions. [2021-06-05 21:27:32,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:32,694 INFO L276 IsEmpty]: Start isEmpty. Operand 40967 states and 126141 transitions. [2021-06-05 21:27:32,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:32,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:32,704 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:32,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9930 [2021-06-05 21:27:32,905 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:32,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:32,905 INFO L82 PathProgramCache]: Analyzing trace with hash 429354799, now seen corresponding path program 221 times [2021-06-05 21:27:32,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:32,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129167763] [2021-06-05 21:27:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:27:32,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:32,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129167763] [2021-06-05 21:27:32,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129167763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:32,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210882756] [2021-06-05 21:27:32,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:32,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:27:32,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:32,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:32,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:27:33,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210882756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:33,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:33,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:27:33,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680093991] [2021-06-05 21:27:33,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:27:33,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:33,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:27:33,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:27:33,035 INFO L87 Difference]: Start difference. First operand 40967 states and 126141 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:33,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:33,486 INFO L93 Difference]: Finished difference Result 46670 states and 143099 transitions. [2021-06-05 21:27:33,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:27:33,487 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:33,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:33,549 INFO L225 Difference]: With dead ends: 46670 [2021-06-05 21:27:33,549 INFO L226 Difference]: Without dead ends: 46670 [2021-06-05 21:27:33,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:27:33,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46670 states. [2021-06-05 21:27:34,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46670 to 45904. [2021-06-05 21:27:34,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45904 states, 45903 states have (on average 3.0725224930832407) internal successors, (141038), 45903 states have internal predecessors, (141038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45904 states to 45904 states and 141038 transitions. [2021-06-05 21:27:34,173 INFO L78 Accepts]: Start accepts. Automaton has 45904 states and 141038 transitions. Word has length 22 [2021-06-05 21:27:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:34,173 INFO L482 AbstractCegarLoop]: Abstraction has 45904 states and 141038 transitions. [2021-06-05 21:27:34,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:34,173 INFO L276 IsEmpty]: Start isEmpty. Operand 45904 states and 141038 transitions. [2021-06-05 21:27:34,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:34,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:34,186 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:34,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9931,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:34,387 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:34,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:34,387 INFO L82 PathProgramCache]: Analyzing trace with hash -76991467, now seen corresponding path program 222 times [2021-06-05 21:27:34,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:34,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914426529] [2021-06-05 21:27:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:34,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:34,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914426529] [2021-06-05 21:27:34,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914426529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:34,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050387736] [2021-06-05 21:27:34,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:34,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:27:34,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:34,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:34,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:34,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050387736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:34,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:34,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:27:34,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875061095] [2021-06-05 21:27:34,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:27:34,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:34,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:27:34,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:27:34,519 INFO L87 Difference]: Start difference. First operand 45904 states and 141038 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:34,759 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 21:27:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:34,917 INFO L93 Difference]: Finished difference Result 49343 states and 151040 transitions. [2021-06-05 21:27:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:27:34,918 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:34,996 INFO L225 Difference]: With dead ends: 49343 [2021-06-05 21:27:34,996 INFO L226 Difference]: Without dead ends: 49343 [2021-06-05 21:27:34,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 265.3ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:27:35,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49343 states. [2021-06-05 21:27:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49343 to 46131. [2021-06-05 21:27:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46131 states, 46130 states have (on average 3.0718621287665293) internal successors, (141705), 46130 states have internal predecessors, (141705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:36,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46131 states to 46131 states and 141705 transitions. [2021-06-05 21:27:36,008 INFO L78 Accepts]: Start accepts. Automaton has 46131 states and 141705 transitions. Word has length 22 [2021-06-05 21:27:36,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:36,008 INFO L482 AbstractCegarLoop]: Abstraction has 46131 states and 141705 transitions. [2021-06-05 21:27:36,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:36,008 INFO L276 IsEmpty]: Start isEmpty. Operand 46131 states and 141705 transitions. [2021-06-05 21:27:36,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:36,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:36,020 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:36,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9932 [2021-06-05 21:27:36,221 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:36,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:36,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1406143471, now seen corresponding path program 223 times [2021-06-05 21:27:36,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:36,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264635218] [2021-06-05 21:27:36,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:36,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:36,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264635218] [2021-06-05 21:27:36,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264635218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:36,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281693733] [2021-06-05 21:27:36,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:36,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:36,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:36,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281693733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:36,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:36,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:27:36,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211656382] [2021-06-05 21:27:36,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:27:36,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:36,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:27:36,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:27:36,358 INFO L87 Difference]: Start difference. First operand 46131 states and 141705 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:36,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:36,680 INFO L93 Difference]: Finished difference Result 55150 states and 168573 transitions. [2021-06-05 21:27:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:27:36,681 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:36,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:36,781 INFO L225 Difference]: With dead ends: 55150 [2021-06-05 21:27:36,781 INFO L226 Difference]: Without dead ends: 55150 [2021-06-05 21:27:36,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:27:36,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55150 states. [2021-06-05 21:27:37,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55150 to 52518. [2021-06-05 21:27:37,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52518 states, 52517 states have (on average 3.067406744482739) internal successors, (161091), 52517 states have internal predecessors, (161091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52518 states to 52518 states and 161091 transitions. [2021-06-05 21:27:37,862 INFO L78 Accepts]: Start accepts. Automaton has 52518 states and 161091 transitions. Word has length 22 [2021-06-05 21:27:37,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:37,862 INFO L482 AbstractCegarLoop]: Abstraction has 52518 states and 161091 transitions. [2021-06-05 21:27:37,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:37,862 INFO L276 IsEmpty]: Start isEmpty. Operand 52518 states and 161091 transitions. [2021-06-05 21:27:37,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:37,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:37,876 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:38,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9933,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:38,077 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:38,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:38,077 INFO L82 PathProgramCache]: Analyzing trace with hash 138686293, now seen corresponding path program 224 times [2021-06-05 21:27:38,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:38,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083818566] [2021-06-05 21:27:38,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:38,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:38,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083818566] [2021-06-05 21:27:38,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083818566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:38,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805133990] [2021-06-05 21:27:38,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:38,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:27:38,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:38,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:38,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:38,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805133990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:38,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:38,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:27:38,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301874406] [2021-06-05 21:27:38,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:27:38,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:38,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:27:38,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:27:38,213 INFO L87 Difference]: Start difference. First operand 52518 states and 161091 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:38,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:38,679 INFO L93 Difference]: Finished difference Result 68037 states and 207399 transitions. [2021-06-05 21:27:38,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:27:38,679 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:38,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:38,795 INFO L225 Difference]: With dead ends: 68037 [2021-06-05 21:27:38,796 INFO L226 Difference]: Without dead ends: 68037 [2021-06-05 21:27:38,796 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 251.1ms TimeCoverageRelationStatistics Valid=523, Invalid=1037, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:27:38,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68037 states. [2021-06-05 21:27:39,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68037 to 63418. [2021-06-05 21:27:39,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63418 states, 63417 states have (on average 3.060788116751029) internal successors, (194106), 63417 states have internal predecessors, (194106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:40,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63418 states to 63418 states and 194106 transitions. [2021-06-05 21:27:40,081 INFO L78 Accepts]: Start accepts. Automaton has 63418 states and 194106 transitions. Word has length 22 [2021-06-05 21:27:40,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:40,081 INFO L482 AbstractCegarLoop]: Abstraction has 63418 states and 194106 transitions. [2021-06-05 21:27:40,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 63418 states and 194106 transitions. [2021-06-05 21:27:40,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:40,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:40,097 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:40,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9934,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:40,298 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:40,298 INFO L82 PathProgramCache]: Analyzing trace with hash -353147191, now seen corresponding path program 225 times [2021-06-05 21:27:40,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:40,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622183370] [2021-06-05 21:27:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:40,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:40,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622183370] [2021-06-05 21:27:40,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622183370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:40,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280792318] [2021-06-05 21:27:40,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:40,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:27:40,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:40,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:40,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:40,709 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 21:27:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:40,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280792318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:40,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:40,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:27:40,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624535505] [2021-06-05 21:27:40,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:27:40,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:40,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:27:40,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:27:40,730 INFO L87 Difference]: Start difference. First operand 63418 states and 194106 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:41,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:41,118 INFO L93 Difference]: Finished difference Result 75602 states and 230264 transitions. [2021-06-05 21:27:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:27:41,121 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:41,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:41,249 INFO L225 Difference]: With dead ends: 75602 [2021-06-05 21:27:41,249 INFO L226 Difference]: Without dead ends: 75602 [2021-06-05 21:27:41,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:27:41,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75602 states. [2021-06-05 21:27:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75602 to 53421. [2021-06-05 21:27:42,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53421 states, 53420 states have (on average 3.0645638337701238) internal successors, (163709), 53420 states have internal predecessors, (163709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53421 states to 53421 states and 163709 transitions. [2021-06-05 21:27:42,445 INFO L78 Accepts]: Start accepts. Automaton has 53421 states and 163709 transitions. Word has length 22 [2021-06-05 21:27:42,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:42,445 INFO L482 AbstractCegarLoop]: Abstraction has 53421 states and 163709 transitions. [2021-06-05 21:27:42,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:42,445 INFO L276 IsEmpty]: Start isEmpty. Operand 53421 states and 163709 transitions. [2021-06-05 21:27:42,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:42,459 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:42,459 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:42,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9935,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:42,660 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:42,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:42,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1620604369, now seen corresponding path program 226 times [2021-06-05 21:27:42,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:42,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672385138] [2021-06-05 21:27:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:42,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:42,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672385138] [2021-06-05 21:27:42,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672385138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:42,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112626076] [2021-06-05 21:27:42,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:42,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:27:42,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:42,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:42,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:42,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112626076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:42,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:42,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:27:42,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792991917] [2021-06-05 21:27:42,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:27:42,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:42,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:27:42,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:27:42,810 INFO L87 Difference]: Start difference. First operand 53421 states and 163709 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:43,276 INFO L93 Difference]: Finished difference Result 68985 states and 210204 transitions. [2021-06-05 21:27:43,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:27:43,277 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:43,393 INFO L225 Difference]: With dead ends: 68985 [2021-06-05 21:27:43,393 INFO L226 Difference]: Without dead ends: 68985 [2021-06-05 21:27:43,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=560, Invalid=1080, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:27:43,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68985 states. [2021-06-05 21:27:44,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68985 to 46695. [2021-06-05 21:27:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46695 states, 46694 states have (on average 3.0735426393112606) internal successors, (143516), 46694 states have internal predecessors, (143516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46695 states to 46695 states and 143516 transitions. [2021-06-05 21:27:44,486 INFO L78 Accepts]: Start accepts. Automaton has 46695 states and 143516 transitions. Word has length 22 [2021-06-05 21:27:44,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:44,486 INFO L482 AbstractCegarLoop]: Abstraction has 46695 states and 143516 transitions. [2021-06-05 21:27:44,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 46695 states and 143516 transitions. [2021-06-05 21:27:44,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:44,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:44,500 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:44,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9936,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:44,700 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:44,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:44,700 INFO L82 PathProgramCache]: Analyzing trace with hash 414428143, now seen corresponding path program 227 times [2021-06-05 21:27:44,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:44,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103707741] [2021-06-05 21:27:44,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:44,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:44,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103707741] [2021-06-05 21:27:44,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103707741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:44,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053084866] [2021-06-05 21:27:44,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:44,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:27:44,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:44,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:44,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:44,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053084866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:44,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:44,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:27:44,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503237444] [2021-06-05 21:27:44,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:27:44,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:44,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:27:44,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:27:44,832 INFO L87 Difference]: Start difference. First operand 46695 states and 143516 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:45,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:45,389 INFO L93 Difference]: Finished difference Result 49438 states and 151354 transitions. [2021-06-05 21:27:45,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:27:45,390 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:45,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:45,475 INFO L225 Difference]: With dead ends: 49438 [2021-06-05 21:27:45,475 INFO L226 Difference]: Without dead ends: 49438 [2021-06-05 21:27:45,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:27:45,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49438 states. [2021-06-05 21:27:45,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49438 to 36426. [2021-06-05 21:27:46,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36426 states, 36425 states have (on average 3.0824433768016473) internal successors, (112278), 36425 states have internal predecessors, (112278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:46,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36426 states to 36426 states and 112278 transitions. [2021-06-05 21:27:46,080 INFO L78 Accepts]: Start accepts. Automaton has 36426 states and 112278 transitions. Word has length 22 [2021-06-05 21:27:46,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:46,080 INFO L482 AbstractCegarLoop]: Abstraction has 36426 states and 112278 transitions. [2021-06-05 21:27:46,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:46,081 INFO L276 IsEmpty]: Start isEmpty. Operand 36426 states and 112278 transitions. [2021-06-05 21:27:46,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:46,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:46,089 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:46,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9937 [2021-06-05 21:27:46,290 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:46,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:46,290 INFO L82 PathProgramCache]: Analyzing trace with hash -91918123, now seen corresponding path program 228 times [2021-06-05 21:27:46,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:46,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041304972] [2021-06-05 21:27:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:27:46,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:46,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041304972] [2021-06-05 21:27:46,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041304972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:46,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622849439] [2021-06-05 21:27:46,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:46,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:27:46,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:46,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:46,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:27:46,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622849439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:46,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:46,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:27:46,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711494753] [2021-06-05 21:27:46,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:27:46,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:46,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:27:46,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:27:46,424 INFO L87 Difference]: Start difference. First operand 36426 states and 112278 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:46,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:46,882 INFO L93 Difference]: Finished difference Result 38526 states and 118284 transitions. [2021-06-05 21:27:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:27:46,882 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:46,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:46,936 INFO L225 Difference]: With dead ends: 38526 [2021-06-05 21:27:46,936 INFO L226 Difference]: Without dead ends: 38526 [2021-06-05 21:27:46,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:27:46,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38526 states. [2021-06-05 21:27:47,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38526 to 38139. [2021-06-05 21:27:47,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38139 states, 38138 states have (on average 3.0788976873459544) internal successors, (117423), 38138 states have internal predecessors, (117423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38139 states to 38139 states and 117423 transitions. [2021-06-05 21:27:47,485 INFO L78 Accepts]: Start accepts. Automaton has 38139 states and 117423 transitions. Word has length 22 [2021-06-05 21:27:47,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:47,485 INFO L482 AbstractCegarLoop]: Abstraction has 38139 states and 117423 transitions. [2021-06-05 21:27:47,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:47,486 INFO L276 IsEmpty]: Start isEmpty. Operand 38139 states and 117423 transitions. [2021-06-05 21:27:47,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:47,496 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:47,496 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:47,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9938,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:47,696 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:47,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:47,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1391216815, now seen corresponding path program 229 times [2021-06-05 21:27:47,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:47,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152064158] [2021-06-05 21:27:47,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:47,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:47,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152064158] [2021-06-05 21:27:47,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152064158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:47,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261124466] [2021-06-05 21:27:47,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:47,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:47,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:47,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261124466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:47,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:47,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:27:47,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303256800] [2021-06-05 21:27:47,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:27:47,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:47,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:27:47,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:27:47,838 INFO L87 Difference]: Start difference. First operand 38139 states and 117423 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:48,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:48,278 INFO L93 Difference]: Finished difference Result 38877 states and 119237 transitions. [2021-06-05 21:27:48,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:27:48,278 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:48,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:48,328 INFO L225 Difference]: With dead ends: 38877 [2021-06-05 21:27:48,328 INFO L226 Difference]: Without dead ends: 38877 [2021-06-05 21:27:48,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:27:48,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38877 states. [2021-06-05 21:27:48,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38877 to 37259. [2021-06-05 21:27:48,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37259 states, 37258 states have (on average 3.0800096623543936) internal successors, (114755), 37258 states have internal predecessors, (114755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:48,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37259 states to 37259 states and 114755 transitions. [2021-06-05 21:27:48,852 INFO L78 Accepts]: Start accepts. Automaton has 37259 states and 114755 transitions. Word has length 22 [2021-06-05 21:27:48,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:48,852 INFO L482 AbstractCegarLoop]: Abstraction has 37259 states and 114755 transitions. [2021-06-05 21:27:48,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:48,852 INFO L276 IsEmpty]: Start isEmpty. Operand 37259 states and 114755 transitions. [2021-06-05 21:27:48,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:48,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:48,864 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:49,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9939 [2021-06-05 21:27:49,077 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:49,077 INFO L82 PathProgramCache]: Analyzing trace with hash 123759637, now seen corresponding path program 230 times [2021-06-05 21:27:49,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:49,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829082968] [2021-06-05 21:27:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:49,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:49,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829082968] [2021-06-05 21:27:49,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829082968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:49,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384218593] [2021-06-05 21:27:49,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:49,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:27:49,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:49,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:49,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:49,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384218593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:49,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:49,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:27:49,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491880569] [2021-06-05 21:27:49,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:27:49,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:49,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:27:49,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:27:49,221 INFO L87 Difference]: Start difference. First operand 37259 states and 114755 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:49,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:49,546 INFO L93 Difference]: Finished difference Result 39004 states and 119600 transitions. [2021-06-05 21:27:49,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:27:49,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:49,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:49,601 INFO L225 Difference]: With dead ends: 39004 [2021-06-05 21:27:49,601 INFO L226 Difference]: Without dead ends: 39004 [2021-06-05 21:27:49,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:27:49,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39004 states. [2021-06-05 21:27:50,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39004 to 37661. [2021-06-05 21:27:50,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37661 states, 37660 states have (on average 3.0793414763674987) internal successors, (115968), 37660 states have internal predecessors, (115968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37661 states to 37661 states and 115968 transitions. [2021-06-05 21:27:50,289 INFO L78 Accepts]: Start accepts. Automaton has 37661 states and 115968 transitions. Word has length 22 [2021-06-05 21:27:50,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:50,289 INFO L482 AbstractCegarLoop]: Abstraction has 37661 states and 115968 transitions. [2021-06-05 21:27:50,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 37661 states and 115968 transitions. [2021-06-05 21:27:50,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:50,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:50,298 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:50,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9940 [2021-06-05 21:27:50,499 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:50,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:50,499 INFO L82 PathProgramCache]: Analyzing trace with hash -512707217, now seen corresponding path program 231 times [2021-06-05 21:27:50,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:50,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835730955] [2021-06-05 21:27:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:50,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:50,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835730955] [2021-06-05 21:27:50,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835730955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:50,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708335219] [2021-06-05 21:27:50,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:50,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:27:50,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:50,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:50,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:50,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708335219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:50,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:50,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:27:50,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947795892] [2021-06-05 21:27:50,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:27:50,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:50,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:27:50,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:27:50,667 INFO L87 Difference]: Start difference. First operand 37661 states and 115968 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:51,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:51,093 INFO L93 Difference]: Finished difference Result 39220 states and 120135 transitions. [2021-06-05 21:27:51,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 21:27:51,093 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:51,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:51,148 INFO L225 Difference]: With dead ends: 39220 [2021-06-05 21:27:51,148 INFO L226 Difference]: Without dead ends: 39220 [2021-06-05 21:27:51,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 308.3ms TimeCoverageRelationStatistics Valid=664, Invalid=1316, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:27:51,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39220 states. [2021-06-05 21:27:51,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39220 to 37458. [2021-06-05 21:27:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37458 states, 37457 states have (on average 3.08011853592119) internal successors, (115372), 37457 states have internal predecessors, (115372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:51,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37458 states to 37458 states and 115372 transitions. [2021-06-05 21:27:51,787 INFO L78 Accepts]: Start accepts. Automaton has 37458 states and 115372 transitions. Word has length 22 [2021-06-05 21:27:51,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:51,787 INFO L482 AbstractCegarLoop]: Abstraction has 37458 states and 115372 transitions. [2021-06-05 21:27:51,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 37458 states and 115372 transitions. [2021-06-05 21:27:51,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:51,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:51,799 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:52,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9941 [2021-06-05 21:27:52,022 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:52,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:52,022 INFO L82 PathProgramCache]: Analyzing trace with hash -2054510059, now seen corresponding path program 232 times [2021-06-05 21:27:52,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:52,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137532703] [2021-06-05 21:27:52,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:52,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:52,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137532703] [2021-06-05 21:27:52,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137532703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:52,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887400542] [2021-06-05 21:27:52,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:52,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:27:52,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:52,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:52,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:27:52,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887400542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:52,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:52,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:27:52,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321880103] [2021-06-05 21:27:52,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:27:52,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:52,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:27:52,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:27:52,140 INFO L87 Difference]: Start difference. First operand 37458 states and 115372 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:52,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:52,400 INFO L93 Difference]: Finished difference Result 37627 states and 115565 transitions. [2021-06-05 21:27:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:27:52,400 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:52,457 INFO L225 Difference]: With dead ends: 37627 [2021-06-05 21:27:52,457 INFO L226 Difference]: Without dead ends: 37623 [2021-06-05 21:27:52,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:27:52,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37623 states. [2021-06-05 21:27:53,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37623 to 37458. [2021-06-05 21:27:53,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37458 states, 37457 states have (on average 3.0800117468030006) internal successors, (115368), 37457 states have internal predecessors, (115368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37458 states to 37458 states and 115368 transitions. [2021-06-05 21:27:53,153 INFO L78 Accepts]: Start accepts. Automaton has 37458 states and 115368 transitions. Word has length 22 [2021-06-05 21:27:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:53,153 INFO L482 AbstractCegarLoop]: Abstraction has 37458 states and 115368 transitions. [2021-06-05 21:27:53,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 37458 states and 115368 transitions. [2021-06-05 21:27:53,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:53,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:53,163 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:53,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9942 [2021-06-05 21:27:53,364 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:53,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:53,364 INFO L82 PathProgramCache]: Analyzing trace with hash -324040043, now seen corresponding path program 233 times [2021-06-05 21:27:53,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:53,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410996891] [2021-06-05 21:27:53,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:53,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:53,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410996891] [2021-06-05 21:27:53,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410996891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:53,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055286162] [2021-06-05 21:27:53,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:53,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:27:53,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:53,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:53,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:53,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055286162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:53,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:53,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:27:53,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170426793] [2021-06-05 21:27:53,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:27:53,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:53,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:27:53,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:27:53,518 INFO L87 Difference]: Start difference. First operand 37458 states and 115368 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:53,911 INFO L93 Difference]: Finished difference Result 44126 states and 134929 transitions. [2021-06-05 21:27:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:27:53,911 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:53,980 INFO L225 Difference]: With dead ends: 44126 [2021-06-05 21:27:53,981 INFO L226 Difference]: Without dead ends: 44126 [2021-06-05 21:27:53,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=509, Invalid=973, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:27:54,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44126 states. [2021-06-05 21:27:54,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44126 to 42198. [2021-06-05 21:27:54,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42198 states, 42197 states have (on average 3.0731331611251984) internal successors, (129677), 42197 states have internal predecessors, (129677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:54,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42198 states to 42198 states and 129677 transitions. [2021-06-05 21:27:54,750 INFO L78 Accepts]: Start accepts. Automaton has 42198 states and 129677 transitions. Word has length 22 [2021-06-05 21:27:54,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:54,750 INFO L482 AbstractCegarLoop]: Abstraction has 42198 states and 129677 transitions. [2021-06-05 21:27:54,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:54,751 INFO L276 IsEmpty]: Start isEmpty. Operand 42198 states and 129677 transitions. [2021-06-05 21:27:54,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:54,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:54,764 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:54,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9943,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:54,969 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:54,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:54,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1420323963, now seen corresponding path program 234 times [2021-06-05 21:27:54,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:54,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741894557] [2021-06-05 21:27:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:55,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:55,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741894557] [2021-06-05 21:27:55,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741894557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:55,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022827741] [2021-06-05 21:27:55,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:55,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:27:55,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:55,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:55,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:55,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022827741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:55,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:55,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:27:55,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807826519] [2021-06-05 21:27:55,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:27:55,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:55,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:27:55,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:27:55,115 INFO L87 Difference]: Start difference. First operand 42198 states and 129677 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:55,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:55,447 INFO L93 Difference]: Finished difference Result 46244 states and 141435 transitions. [2021-06-05 21:27:55,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:27:55,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:55,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:55,710 INFO L225 Difference]: With dead ends: 46244 [2021-06-05 21:27:55,710 INFO L226 Difference]: Without dead ends: 46244 [2021-06-05 21:27:55,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:27:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46244 states. [2021-06-05 21:27:56,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46244 to 45504. [2021-06-05 21:27:56,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45504 states, 45503 states have (on average 3.068566907676417) internal successors, (139629), 45503 states have internal predecessors, (139629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:56,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45504 states to 45504 states and 139629 transitions. [2021-06-05 21:27:56,323 INFO L78 Accepts]: Start accepts. Automaton has 45504 states and 139629 transitions. Word has length 22 [2021-06-05 21:27:56,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:56,323 INFO L482 AbstractCegarLoop]: Abstraction has 45504 states and 139629 transitions. [2021-06-05 21:27:56,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:56,323 INFO L276 IsEmpty]: Start isEmpty. Operand 45504 states and 139629 transitions. [2021-06-05 21:27:56,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:56,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:56,339 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:56,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9944,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:56,539 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:56,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:56,539 INFO L82 PathProgramCache]: Analyzing trace with hash 783857109, now seen corresponding path program 235 times [2021-06-05 21:27:56,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:56,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632003211] [2021-06-05 21:27:56,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:56,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:56,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632003211] [2021-06-05 21:27:56,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632003211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:56,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320942230] [2021-06-05 21:27:56,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:56,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:56,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:56,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320942230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:56,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:56,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:27:56,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280918761] [2021-06-05 21:27:56,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:27:56,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:56,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:27:56,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:27:56,691 INFO L87 Difference]: Start difference. First operand 45504 states and 139629 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:57,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:57,296 INFO L93 Difference]: Finished difference Result 47891 states and 146334 transitions. [2021-06-05 21:27:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 21:27:57,297 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:57,382 INFO L225 Difference]: With dead ends: 47891 [2021-06-05 21:27:57,382 INFO L226 Difference]: Without dead ends: 47891 [2021-06-05 21:27:57,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 442.1ms TimeCoverageRelationStatistics Valid=614, Invalid=1192, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:27:57,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47891 states. [2021-06-05 21:27:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47891 to 46839. [2021-06-05 21:27:58,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46839 states, 46838 states have (on average 3.066612579529442) internal successors, (143634), 46838 states have internal predecessors, (143634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:58,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46839 states to 46839 states and 143634 transitions. [2021-06-05 21:27:58,476 INFO L78 Accepts]: Start accepts. Automaton has 46839 states and 143634 transitions. Word has length 22 [2021-06-05 21:27:58,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:58,476 INFO L482 AbstractCegarLoop]: Abstraction has 46839 states and 143634 transitions. [2021-06-05 21:27:58,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:58,476 INFO L276 IsEmpty]: Start isEmpty. Operand 46839 states and 143634 transitions. [2021-06-05 21:27:58,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:27:58,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:58,491 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:58,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9945,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:58,692 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:58,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:58,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1486004305, now seen corresponding path program 236 times [2021-06-05 21:27:58,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:58,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347907839] [2021-06-05 21:27:58,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:58,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:58,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347907839] [2021-06-05 21:27:58,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347907839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:58,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345162883] [2021-06-05 21:27:58,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:58,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:27:58,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:58,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:27:58,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:27:58,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345162883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:58,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:58,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:27:58,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550978252] [2021-06-05 21:27:58,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:27:58,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:58,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:27:58,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:27:58,808 INFO L87 Difference]: Start difference. First operand 46839 states and 143634 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:59,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:59,096 INFO L93 Difference]: Finished difference Result 47040 states and 143931 transitions. [2021-06-05 21:27:59,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:27:59,096 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:27:59,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:59,178 INFO L225 Difference]: With dead ends: 47040 [2021-06-05 21:27:59,178 INFO L226 Difference]: Without dead ends: 47036 [2021-06-05 21:27:59,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:27:59,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47036 states. [2021-06-05 21:28:00,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47036 to 46875. [2021-06-05 21:28:00,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46875 states, 46874 states have (on average 3.066646755130776) internal successors, (143746), 46874 states have internal predecessors, (143746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:00,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46875 states to 46875 states and 143746 transitions. [2021-06-05 21:28:00,189 INFO L78 Accepts]: Start accepts. Automaton has 46875 states and 143746 transitions. Word has length 22 [2021-06-05 21:28:00,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:00,189 INFO L482 AbstractCegarLoop]: Abstraction has 46875 states and 143746 transitions. [2021-06-05 21:28:00,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:00,189 INFO L276 IsEmpty]: Start isEmpty. Operand 46875 states and 143746 transitions. [2021-06-05 21:28:00,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:00,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:00,206 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:00,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9946,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:00,407 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:00,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:00,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1091213931, now seen corresponding path program 237 times [2021-06-05 21:28:00,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:00,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699949943] [2021-06-05 21:28:00,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:00,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:00,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699949943] [2021-06-05 21:28:00,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699949943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:00,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812443364] [2021-06-05 21:28:00,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:00,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:28:00,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:00,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:00,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:00,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812443364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:00,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:00,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:28:00,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984819860] [2021-06-05 21:28:00,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:28:00,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:00,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:28:00,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:28:00,527 INFO L87 Difference]: Start difference. First operand 46875 states and 143746 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:00,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:00,747 INFO L93 Difference]: Finished difference Result 47717 states and 145917 transitions. [2021-06-05 21:28:00,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:28:00,747 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:00,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:00,824 INFO L225 Difference]: With dead ends: 47717 [2021-06-05 21:28:00,824 INFO L226 Difference]: Without dead ends: 47717 [2021-06-05 21:28:00,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:28:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47717 states. [2021-06-05 21:28:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47717 to 46880. [2021-06-05 21:28:01,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46880 states, 46879 states have (on average 3.066639646750144) internal successors, (143761), 46879 states have internal predecessors, (143761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:01,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46880 states to 46880 states and 143761 transitions. [2021-06-05 21:28:01,821 INFO L78 Accepts]: Start accepts. Automaton has 46880 states and 143761 transitions. Word has length 22 [2021-06-05 21:28:01,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:01,821 INFO L482 AbstractCegarLoop]: Abstraction has 46880 states and 143761 transitions. [2021-06-05 21:28:01,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:01,821 INFO L276 IsEmpty]: Start isEmpty. Operand 46880 states and 143761 transitions. [2021-06-05 21:28:01,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:01,835 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:01,836 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:02,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9947,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:02,036 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:02,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:02,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1474706031, now seen corresponding path program 238 times [2021-06-05 21:28:02,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:02,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233493739] [2021-06-05 21:28:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:02,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:02,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233493739] [2021-06-05 21:28:02,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233493739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:02,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986690969] [2021-06-05 21:28:02,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:02,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:02,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:02,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:02,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:02,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986690969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:02,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:02,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:28:02,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110430708] [2021-06-05 21:28:02,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:02,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:02,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:02,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:02,161 INFO L87 Difference]: Start difference. First operand 46880 states and 143761 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:02,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:02,414 INFO L93 Difference]: Finished difference Result 48348 states and 147772 transitions. [2021-06-05 21:28:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:28:02,415 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:02,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:02,480 INFO L225 Difference]: With dead ends: 48348 [2021-06-05 21:28:02,480 INFO L226 Difference]: Without dead ends: 48348 [2021-06-05 21:28:02,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:28:02,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48348 states. [2021-06-05 21:28:03,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48348 to 46887. [2021-06-05 21:28:03,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46887 states, 46886 states have (on average 3.066608369236019) internal successors, (143781), 46886 states have internal predecessors, (143781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:03,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46887 states to 46887 states and 143781 transitions. [2021-06-05 21:28:03,547 INFO L78 Accepts]: Start accepts. Automaton has 46887 states and 143781 transitions. Word has length 22 [2021-06-05 21:28:03,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:03,547 INFO L482 AbstractCegarLoop]: Abstraction has 46887 states and 143781 transitions. [2021-06-05 21:28:03,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:03,547 INFO L276 IsEmpty]: Start isEmpty. Operand 46887 states and 143781 transitions. [2021-06-05 21:28:03,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:03,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:03,562 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:03,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9948 [2021-06-05 21:28:03,763 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:03,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:03,763 INFO L82 PathProgramCache]: Analyzing trace with hash -586153771, now seen corresponding path program 239 times [2021-06-05 21:28:03,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:03,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859480430] [2021-06-05 21:28:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:03,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:03,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859480430] [2021-06-05 21:28:03,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859480430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:03,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324839244] [2021-06-05 21:28:03,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:03,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:28:03,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:03,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:03,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:03,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324839244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:03,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:03,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:28:03,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767730176] [2021-06-05 21:28:03,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:03,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:03,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:03,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:03,889 INFO L87 Difference]: Start difference. First operand 46887 states and 143781 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:04,217 INFO L93 Difference]: Finished difference Result 64639 states and 196977 transitions. [2021-06-05 21:28:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:28:04,217 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:04,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:04,333 INFO L225 Difference]: With dead ends: 64639 [2021-06-05 21:28:04,333 INFO L226 Difference]: Without dead ends: 64639 [2021-06-05 21:28:04,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:28:04,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64639 states. [2021-06-05 21:28:05,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64639 to 61565. [2021-06-05 21:28:05,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61565 states, 61564 states have (on average 3.058508219089078) internal successors, (188294), 61564 states have internal predecessors, (188294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61565 states to 61565 states and 188294 transitions. [2021-06-05 21:28:05,716 INFO L78 Accepts]: Start accepts. Automaton has 61565 states and 188294 transitions. Word has length 22 [2021-06-05 21:28:05,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:05,716 INFO L482 AbstractCegarLoop]: Abstraction has 61565 states and 188294 transitions. [2021-06-05 21:28:05,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,716 INFO L276 IsEmpty]: Start isEmpty. Operand 61565 states and 188294 transitions. [2021-06-05 21:28:05,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:05,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:05,733 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:05,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9949,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:05,933 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:05,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:05,934 INFO L82 PathProgramCache]: Analyzing trace with hash -48298193, now seen corresponding path program 240 times [2021-06-05 21:28:05,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:05,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561590663] [2021-06-05 21:28:05,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:05,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:05,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561590663] [2021-06-05 21:28:05,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561590663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:05,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521728528] [2021-06-05 21:28:05,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:06,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:28:06,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:06,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:06,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:06,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521728528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:06,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:06,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:28:06,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016345913] [2021-06-05 21:28:06,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:28:06,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:06,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:28:06,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:06,073 INFO L87 Difference]: Start difference. First operand 61565 states and 188294 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:06,524 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 21:28:06,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:06,768 INFO L93 Difference]: Finished difference Result 64066 states and 195284 transitions. [2021-06-05 21:28:06,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:28:06,769 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:06,878 INFO L225 Difference]: With dead ends: 64066 [2021-06-05 21:28:06,879 INFO L226 Difference]: Without dead ends: 64066 [2021-06-05 21:28:06,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 489.7ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:28:06,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64066 states. [2021-06-05 21:28:07,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64066 to 61726. [2021-06-05 21:28:08,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61726 states, 61725 states have (on average 3.0580639935196436) internal successors, (188759), 61725 states have internal predecessors, (188759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61726 states to 61726 states and 188759 transitions. [2021-06-05 21:28:08,204 INFO L78 Accepts]: Start accepts. Automaton has 61726 states and 188759 transitions. Word has length 22 [2021-06-05 21:28:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:08,204 INFO L482 AbstractCegarLoop]: Abstraction has 61726 states and 188759 transitions. [2021-06-05 21:28:08,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 61726 states and 188759 transitions. [2021-06-05 21:28:08,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:08,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:08,222 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:08,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9950 [2021-06-05 21:28:08,422 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:08,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:08,423 INFO L82 PathProgramCache]: Analyzing trace with hash -554644459, now seen corresponding path program 241 times [2021-06-05 21:28:08,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:08,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624802206] [2021-06-05 21:28:08,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:08,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:08,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624802206] [2021-06-05 21:28:08,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624802206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:08,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346038366] [2021-06-05 21:28:08,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:08,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:08,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:08,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346038366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:08,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:08,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:28:08,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131327936] [2021-06-05 21:28:08,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:28:08,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:08,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:28:08,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:08,557 INFO L87 Difference]: Start difference. First operand 61726 states and 188759 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:08,908 INFO L93 Difference]: Finished difference Result 73057 states and 222493 transitions. [2021-06-05 21:28:08,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:08,908 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:08,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:09,033 INFO L225 Difference]: With dead ends: 73057 [2021-06-05 21:28:09,033 INFO L226 Difference]: Without dead ends: 73057 [2021-06-05 21:28:09,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:28:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73057 states. [2021-06-05 21:28:10,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73057 to 71622. [2021-06-05 21:28:10,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71622 states, 71621 states have (on average 3.051926111056813) internal successors, (218582), 71621 states have internal predecessors, (218582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:10,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71622 states to 71622 states and 218582 transitions. [2021-06-05 21:28:10,896 INFO L78 Accepts]: Start accepts. Automaton has 71622 states and 218582 transitions. Word has length 22 [2021-06-05 21:28:10,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:10,896 INFO L482 AbstractCegarLoop]: Abstraction has 71622 states and 218582 transitions. [2021-06-05 21:28:10,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:10,896 INFO L276 IsEmpty]: Start isEmpty. Operand 71622 states and 218582 transitions. [2021-06-05 21:28:10,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:10,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:10,915 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:11,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9951 [2021-06-05 21:28:11,115 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:11,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:11,116 INFO L82 PathProgramCache]: Analyzing trace with hash 928490479, now seen corresponding path program 242 times [2021-06-05 21:28:11,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:11,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652772721] [2021-06-05 21:28:11,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:11,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:11,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652772721] [2021-06-05 21:28:11,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652772721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:11,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431012121] [2021-06-05 21:28:11,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:11,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:11,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:11,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:11,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:11,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431012121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:11,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:11,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:28:11,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309354927] [2021-06-05 21:28:11,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:28:11,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:11,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:28:11,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:11,252 INFO L87 Difference]: Start difference. First operand 71622 states and 218582 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:11,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:11,569 INFO L93 Difference]: Finished difference Result 76219 states and 232111 transitions. [2021-06-05 21:28:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:28:11,570 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:11,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:11,709 INFO L225 Difference]: With dead ends: 76219 [2021-06-05 21:28:11,709 INFO L226 Difference]: Without dead ends: 76219 [2021-06-05 21:28:11,709 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:28:11,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76219 states. [2021-06-05 21:28:12,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76219 to 75735. [2021-06-05 21:28:12,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75735 states, 75734 states have (on average 3.0491588982491353) internal successors, (230925), 75734 states have internal predecessors, (230925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:13,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75735 states to 75735 states and 230925 transitions. [2021-06-05 21:28:13,177 INFO L78 Accepts]: Start accepts. Automaton has 75735 states and 230925 transitions. Word has length 22 [2021-06-05 21:28:13,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:13,177 INFO L482 AbstractCegarLoop]: Abstraction has 75735 states and 230925 transitions. [2021-06-05 21:28:13,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:13,177 INFO L276 IsEmpty]: Start isEmpty. Operand 75735 states and 230925 transitions. [2021-06-05 21:28:13,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:13,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:13,197 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:13,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9952 [2021-06-05 21:28:13,397 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:13,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:13,398 INFO L82 PathProgramCache]: Analyzing trace with hash -338966699, now seen corresponding path program 243 times [2021-06-05 21:28:13,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:13,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57993591] [2021-06-05 21:28:13,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:13,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:13,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57993591] [2021-06-05 21:28:13,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57993591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:13,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600057983] [2021-06-05 21:28:13,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:13,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:28:13,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:13,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:13,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:13,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600057983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:13,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:13,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:28:13,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740293674] [2021-06-05 21:28:13,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:13,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:13,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:13,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:13,550 INFO L87 Difference]: Start difference. First operand 75735 states and 230925 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:14,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:14,237 INFO L93 Difference]: Finished difference Result 76769 states and 233709 transitions. [2021-06-05 21:28:14,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:28:14,237 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:14,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:14,354 INFO L225 Difference]: With dead ends: 76769 [2021-06-05 21:28:14,355 INFO L226 Difference]: Without dead ends: 76769 [2021-06-05 21:28:14,355 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:28:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76769 states. [2021-06-05 21:28:15,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76769 to 75772. [2021-06-05 21:28:15,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75772 states, 75771 states have (on average 3.0491348932969076) internal successors, (231036), 75771 states have internal predecessors, (231036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75772 states to 75772 states and 231036 transitions. [2021-06-05 21:28:15,849 INFO L78 Accepts]: Start accepts. Automaton has 75772 states and 231036 transitions. Word has length 22 [2021-06-05 21:28:15,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:15,849 INFO L482 AbstractCegarLoop]: Abstraction has 75772 states and 231036 transitions. [2021-06-05 21:28:15,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 75772 states and 231036 transitions. [2021-06-05 21:28:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:15,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:15,873 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:16,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9953 [2021-06-05 21:28:16,074 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:16,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:16,074 INFO L82 PathProgramCache]: Analyzing trace with hash -975433553, now seen corresponding path program 244 times [2021-06-05 21:28:16,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:16,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461341823] [2021-06-05 21:28:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:16,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:16,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461341823] [2021-06-05 21:28:16,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461341823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:16,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127045058] [2021-06-05 21:28:16,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:16,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:16,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:16,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:16,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:16,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127045058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:16,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:16,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:28:16,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193845415] [2021-06-05 21:28:16,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:16,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:16,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:16,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:16,222 INFO L87 Difference]: Start difference. First operand 75772 states and 231036 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:16,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:16,712 INFO L93 Difference]: Finished difference Result 77589 states and 236129 transitions. [2021-06-05 21:28:16,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:28:16,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:16,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:16,854 INFO L225 Difference]: With dead ends: 77589 [2021-06-05 21:28:16,854 INFO L226 Difference]: Without dead ends: 77589 [2021-06-05 21:28:16,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 234.5ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:28:17,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77589 states. [2021-06-05 21:28:18,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77589 to 76898. [2021-06-05 21:28:18,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76898 states, 76897 states have (on average 3.048415412824948) internal successors, (234414), 76897 states have internal predecessors, (234414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:18,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76898 states to 76898 states and 234414 transitions. [2021-06-05 21:28:18,670 INFO L78 Accepts]: Start accepts. Automaton has 76898 states and 234414 transitions. Word has length 22 [2021-06-05 21:28:18,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:18,670 INFO L482 AbstractCegarLoop]: Abstraction has 76898 states and 234414 transitions. [2021-06-05 21:28:18,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:18,670 INFO L276 IsEmpty]: Start isEmpty. Operand 76898 states and 234414 transitions. [2021-06-05 21:28:18,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:18,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:18,690 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:18,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9954,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:18,890 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:18,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:18,891 INFO L82 PathProgramCache]: Analyzing trace with hash 768930453, now seen corresponding path program 245 times [2021-06-05 21:28:18,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:18,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782663242] [2021-06-05 21:28:18,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:18,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:18,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782663242] [2021-06-05 21:28:18,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782663242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:18,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401371176] [2021-06-05 21:28:18,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:19,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:28:19,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:19,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:19,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:19,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401371176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:19,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:19,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:28:19,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715486661] [2021-06-05 21:28:19,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:19,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:19,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:19,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:19,047 INFO L87 Difference]: Start difference. First operand 76898 states and 234414 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:19,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:19,598 INFO L93 Difference]: Finished difference Result 78959 states and 240117 transitions. [2021-06-05 21:28:19,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:28:19,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:19,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:19,730 INFO L225 Difference]: With dead ends: 78959 [2021-06-05 21:28:19,730 INFO L226 Difference]: Without dead ends: 78959 [2021-06-05 21:28:19,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 310.1ms TimeCoverageRelationStatistics Valid=664, Invalid=1316, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:28:19,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78959 states. [2021-06-05 21:28:21,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78959 to 77340. [2021-06-05 21:28:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77340 states, 77339 states have (on average 3.048138713973545) internal successors, (235740), 77339 states have internal predecessors, (235740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:21,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77340 states to 77340 states and 235740 transitions. [2021-06-05 21:28:21,712 INFO L78 Accepts]: Start accepts. Automaton has 77340 states and 235740 transitions. Word has length 22 [2021-06-05 21:28:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:21,712 INFO L482 AbstractCegarLoop]: Abstraction has 77340 states and 235740 transitions. [2021-06-05 21:28:21,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:21,712 INFO L276 IsEmpty]: Start isEmpty. Operand 77340 states and 235740 transitions. [2021-06-05 21:28:21,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:21,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:21,733 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:21,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9955,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:21,934 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:21,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:21,934 INFO L82 PathProgramCache]: Analyzing trace with hash -928937975, now seen corresponding path program 246 times [2021-06-05 21:28:21,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:21,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672103028] [2021-06-05 21:28:21,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:22,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:22,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672103028] [2021-06-05 21:28:22,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672103028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:22,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44078143] [2021-06-05 21:28:22,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:22,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:28:22,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:22,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:22,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:22,091 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:22,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44078143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:22,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:22,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 21:28:22,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341051640] [2021-06-05 21:28:22,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:22,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:22,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:22,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:22,092 INFO L87 Difference]: Start difference. First operand 77340 states and 235740 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:22,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:22,614 INFO L93 Difference]: Finished difference Result 77569 states and 236048 transitions. [2021-06-05 21:28:22,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:28:22,614 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:22,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:22,751 INFO L225 Difference]: With dead ends: 77569 [2021-06-05 21:28:22,751 INFO L226 Difference]: Without dead ends: 77563 [2021-06-05 21:28:22,752 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 241.2ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:28:22,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77563 states. [2021-06-05 21:28:24,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77563 to 77255. [2021-06-05 21:28:24,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77255 states, 77254 states have (on average 3.0479198488104178) internal successors, (235464), 77254 states have internal predecessors, (235464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77255 states to 77255 states and 235464 transitions. [2021-06-05 21:28:24,707 INFO L78 Accepts]: Start accepts. Automaton has 77255 states and 235464 transitions. Word has length 22 [2021-06-05 21:28:24,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:24,707 INFO L482 AbstractCegarLoop]: Abstraction has 77255 states and 235464 transitions. [2021-06-05 21:28:24,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:24,707 INFO L276 IsEmpty]: Start isEmpty. Operand 77255 states and 235464 transitions. [2021-06-05 21:28:24,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:24,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:24,733 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:24,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9956,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:24,956 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:24,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:24,957 INFO L82 PathProgramCache]: Analyzing trace with hash -879550451, now seen corresponding path program 247 times [2021-06-05 21:28:24,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:24,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517389584] [2021-06-05 21:28:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:25,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:25,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517389584] [2021-06-05 21:28:25,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517389584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:25,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045988443] [2021-06-05 21:28:25,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:25,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:25,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:25,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045988443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:25,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:25,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 21:28:25,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640581128] [2021-06-05 21:28:25,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:25,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:25,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:25,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:25,145 INFO L87 Difference]: Start difference. First operand 77255 states and 235464 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:25,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:25,844 INFO L93 Difference]: Finished difference Result 105545 states and 320390 transitions. [2021-06-05 21:28:25,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:28:25,844 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:26,057 INFO L225 Difference]: With dead ends: 105545 [2021-06-05 21:28:26,057 INFO L226 Difference]: Without dead ends: 105545 [2021-06-05 21:28:26,057 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 293.1ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:28:26,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105545 states. [2021-06-05 21:28:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105545 to 103725. [2021-06-05 21:28:28,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103725 states, 103724 states have (on average 3.03849639427712) internal successors, (315165), 103724 states have internal predecessors, (315165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:28,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103725 states to 103725 states and 315165 transitions. [2021-06-05 21:28:28,356 INFO L78 Accepts]: Start accepts. Automaton has 103725 states and 315165 transitions. Word has length 22 [2021-06-05 21:28:28,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:28,356 INFO L482 AbstractCegarLoop]: Abstraction has 103725 states and 315165 transitions. [2021-06-05 21:28:28,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:28,356 INFO L276 IsEmpty]: Start isEmpty. Operand 103725 states and 315165 transitions. [2021-06-05 21:28:28,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:28,383 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:28,383 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:28,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9957,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:28,584 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:28,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:28,584 INFO L82 PathProgramCache]: Analyzing trace with hash 603584487, now seen corresponding path program 248 times [2021-06-05 21:28:28,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:28,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036685100] [2021-06-05 21:28:28,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:28,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:28,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036685100] [2021-06-05 21:28:28,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036685100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:28,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194255945] [2021-06-05 21:28:28,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:28,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:28,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:28,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:28,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:28,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194255945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:28,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:28,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 21:28:28,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152543266] [2021-06-05 21:28:28,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:28:28,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:28,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:28:28,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:28,744 INFO L87 Difference]: Start difference. First operand 103725 states and 315165 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:29,355 INFO L93 Difference]: Finished difference Result 114469 states and 347083 transitions. [2021-06-05 21:28:29,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:28:29,356 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:29,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:29,586 INFO L225 Difference]: With dead ends: 114469 [2021-06-05 21:28:29,586 INFO L226 Difference]: Without dead ends: 114469 [2021-06-05 21:28:29,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=445, Invalid=887, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:28:30,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114469 states. [2021-06-05 21:28:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114469 to 89851. [2021-06-05 21:28:31,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89851 states, 89850 states have (on average 3.041469115191987) internal successors, (273276), 89850 states have internal predecessors, (273276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:31,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89851 states to 89851 states and 273276 transitions. [2021-06-05 21:28:31,772 INFO L78 Accepts]: Start accepts. Automaton has 89851 states and 273276 transitions. Word has length 22 [2021-06-05 21:28:31,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:31,772 INFO L482 AbstractCegarLoop]: Abstraction has 89851 states and 273276 transitions. [2021-06-05 21:28:31,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:31,772 INFO L276 IsEmpty]: Start isEmpty. Operand 89851 states and 273276 transitions. [2021-06-05 21:28:31,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:31,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:31,795 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:31,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9958 [2021-06-05 21:28:31,996 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:31,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:31,996 INFO L82 PathProgramCache]: Analyzing trace with hash -663872691, now seen corresponding path program 249 times [2021-06-05 21:28:31,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:31,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926840590] [2021-06-05 21:28:31,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:32,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:32,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926840590] [2021-06-05 21:28:32,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926840590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:32,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154849734] [2021-06-05 21:28:32,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:32,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:28:32,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:32,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:32,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:32,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154849734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:32,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:32,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 21:28:32,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86955393] [2021-06-05 21:28:32,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:28:32,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:32,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:28:32,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:32,178 INFO L87 Difference]: Start difference. First operand 89851 states and 273276 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:33,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:33,280 INFO L93 Difference]: Finished difference Result 104983 states and 318293 transitions. [2021-06-05 21:28:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 21:28:33,280 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:33,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:33,479 INFO L225 Difference]: With dead ends: 104983 [2021-06-05 21:28:33,479 INFO L226 Difference]: Without dead ends: 104983 [2021-06-05 21:28:33,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 351.9ms TimeCoverageRelationStatistics Valid=732, Invalid=1430, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:28:33,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104983 states. [2021-06-05 21:28:35,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104983 to 90067. [2021-06-05 21:28:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90067 states, 90066 states have (on average 3.0419581196011816) internal successors, (273977), 90066 states have internal predecessors, (273977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:35,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90067 states to 90067 states and 273977 transitions. [2021-06-05 21:28:35,364 INFO L78 Accepts]: Start accepts. Automaton has 90067 states and 273977 transitions. Word has length 22 [2021-06-05 21:28:35,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:35,364 INFO L482 AbstractCegarLoop]: Abstraction has 90067 states and 273977 transitions. [2021-06-05 21:28:35,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:35,365 INFO L276 IsEmpty]: Start isEmpty. Operand 90067 states and 273977 transitions. [2021-06-05 21:28:35,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:35,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:35,390 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:35,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9959,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:35,591 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:35,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:35,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1300339545, now seen corresponding path program 250 times [2021-06-05 21:28:35,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:35,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092397752] [2021-06-05 21:28:35,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:35,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:35,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092397752] [2021-06-05 21:28:35,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092397752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:35,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140936796] [2021-06-05 21:28:35,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:35,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:35,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:35,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:35,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:35,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140936796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:35,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:35,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 21:28:35,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404103151] [2021-06-05 21:28:35,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:28:35,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:35,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:28:35,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:35,760 INFO L87 Difference]: Start difference. First operand 90067 states and 273977 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:36,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:36,944 INFO L93 Difference]: Finished difference Result 104672 states and 317280 transitions. [2021-06-05 21:28:36,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 21:28:36,945 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:36,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:37,151 INFO L225 Difference]: With dead ends: 104672 [2021-06-05 21:28:37,152 INFO L226 Difference]: Without dead ends: 104672 [2021-06-05 21:28:37,152 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 785.6ms TimeCoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 21:28:37,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104672 states. [2021-06-05 21:28:39,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104672 to 90821. [2021-06-05 21:28:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90821 states, 90820 states have (on average 3.041995155252147) internal successors, (276274), 90820 states have internal predecessors, (276274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:39,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90821 states to 90821 states and 276274 transitions. [2021-06-05 21:28:39,352 INFO L78 Accepts]: Start accepts. Automaton has 90821 states and 276274 transitions. Word has length 22 [2021-06-05 21:28:39,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:39,353 INFO L482 AbstractCegarLoop]: Abstraction has 90821 states and 276274 transitions. [2021-06-05 21:28:39,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:39,353 INFO L276 IsEmpty]: Start isEmpty. Operand 90821 states and 276274 transitions. [2021-06-05 21:28:39,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:39,375 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:39,375 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:39,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9960 [2021-06-05 21:28:39,576 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:39,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:39,576 INFO L82 PathProgramCache]: Analyzing trace with hash 632691635, now seen corresponding path program 251 times [2021-06-05 21:28:39,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:39,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468016068] [2021-06-05 21:28:39,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:39,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:39,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468016068] [2021-06-05 21:28:39,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468016068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:39,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464893610] [2021-06-05 21:28:39,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:39,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:28:39,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:39,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:39,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:39,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464893610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:39,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:39,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 21:28:39,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806556043] [2021-06-05 21:28:39,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:28:39,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:39,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:28:39,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:39,737 INFO L87 Difference]: Start difference. First operand 90821 states and 276274 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:40,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:40,418 INFO L93 Difference]: Finished difference Result 105621 states and 320343 transitions. [2021-06-05 21:28:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 21:28:40,418 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:40,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:40,625 INFO L225 Difference]: With dead ends: 105621 [2021-06-05 21:28:40,625 INFO L226 Difference]: Without dead ends: 105621 [2021-06-05 21:28:40,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 316.9ms TimeCoverageRelationStatistics Valid=670, Invalid=1310, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:28:40,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105621 states. [2021-06-05 21:28:42,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105621 to 87948. [2021-06-05 21:28:42,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87948 states, 87947 states have (on average 3.0435716965899915) internal successors, (267673), 87947 states have internal predecessors, (267673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:42,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87948 states to 87948 states and 267673 transitions. [2021-06-05 21:28:42,819 INFO L78 Accepts]: Start accepts. Automaton has 87948 states and 267673 transitions. Word has length 22 [2021-06-05 21:28:42,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:42,819 INFO L482 AbstractCegarLoop]: Abstraction has 87948 states and 267673 transitions. [2021-06-05 21:28:42,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 87948 states and 267673 transitions. [2021-06-05 21:28:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:42,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:42,843 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:43,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9961 [2021-06-05 21:28:43,045 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:43,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:43,045 INFO L82 PathProgramCache]: Analyzing trace with hash -3775219, now seen corresponding path program 252 times [2021-06-05 21:28:43,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:43,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627755336] [2021-06-05 21:28:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:43,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:43,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627755336] [2021-06-05 21:28:43,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627755336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:43,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811695548] [2021-06-05 21:28:43,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:43,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:28:43,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:43,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:43,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:43,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811695548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:43,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:43,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 21:28:43,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320446699] [2021-06-05 21:28:43,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:28:43,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:43,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:28:43,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:43,211 INFO L87 Difference]: Start difference. First operand 87948 states and 267673 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:43,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:43,962 INFO L93 Difference]: Finished difference Result 96355 states and 292373 transitions. [2021-06-05 21:28:43,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 21:28:43,964 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:43,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:44,142 INFO L225 Difference]: With dead ends: 96355 [2021-06-05 21:28:44,143 INFO L226 Difference]: Without dead ends: 96355 [2021-06-05 21:28:44,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 405.0ms TimeCoverageRelationStatistics Valid=929, Invalid=1827, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 21:28:44,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96355 states. [2021-06-05 21:28:45,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96355 to 89848. [2021-06-05 21:28:46,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89848 states, 89847 states have (on average 3.042728193484479) internal successors, (273380), 89847 states have internal predecessors, (273380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:46,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89848 states to 89848 states and 273380 transitions. [2021-06-05 21:28:46,228 INFO L78 Accepts]: Start accepts. Automaton has 89848 states and 273380 transitions. Word has length 22 [2021-06-05 21:28:46,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:46,228 INFO L482 AbstractCegarLoop]: Abstraction has 89848 states and 273380 transitions. [2021-06-05 21:28:46,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:46,229 INFO L276 IsEmpty]: Start isEmpty. Operand 89848 states and 273380 transitions. [2021-06-05 21:28:46,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:46,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:46,256 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:46,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9962,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:46,458 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:46,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:46,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1342276787, now seen corresponding path program 253 times [2021-06-05 21:28:46,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:46,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622071359] [2021-06-05 21:28:46,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:46,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:46,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622071359] [2021-06-05 21:28:46,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622071359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:46,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719399250] [2021-06-05 21:28:46,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:46,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:46,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:46,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719399250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:46,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:46,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 21:28:46,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876998308] [2021-06-05 21:28:46,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:46,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:46,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:46,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:46,607 INFO L87 Difference]: Start difference. First operand 89848 states and 273380 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:47,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:47,131 INFO L93 Difference]: Finished difference Result 91563 states and 278140 transitions. [2021-06-05 21:28:47,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:28:47,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:47,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:47,302 INFO L225 Difference]: With dead ends: 91563 [2021-06-05 21:28:47,302 INFO L226 Difference]: Without dead ends: 91563 [2021-06-05 21:28:47,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 218.7ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:28:47,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91563 states. [2021-06-05 21:28:49,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91563 to 85666. [2021-06-05 21:28:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85666 states, 85665 states have (on average 3.044347166287282) internal successors, (260794), 85665 states have internal predecessors, (260794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:49,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85666 states to 85666 states and 260794 transitions. [2021-06-05 21:28:49,320 INFO L78 Accepts]: Start accepts. Automaton has 85666 states and 260794 transitions. Word has length 22 [2021-06-05 21:28:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:49,320 INFO L482 AbstractCegarLoop]: Abstraction has 85666 states and 260794 transitions. [2021-06-05 21:28:49,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:49,320 INFO L276 IsEmpty]: Start isEmpty. Operand 85666 states and 260794 transitions. [2021-06-05 21:28:49,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:49,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:49,343 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:49,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9963 [2021-06-05 21:28:49,543 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:49,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:49,543 INFO L82 PathProgramCache]: Analyzing trace with hash 140858151, now seen corresponding path program 254 times [2021-06-05 21:28:49,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:49,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446190484] [2021-06-05 21:28:49,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:49,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:49,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446190484] [2021-06-05 21:28:49,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446190484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:49,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467128571] [2021-06-05 21:28:49,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:49,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:49,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:49,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:49,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:49,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467128571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:49,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:49,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 21:28:49,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708862086] [2021-06-05 21:28:49,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:49,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:49,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:49,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:49,706 INFO L87 Difference]: Start difference. First operand 85666 states and 260794 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:50,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:50,187 INFO L93 Difference]: Finished difference Result 90021 states and 273590 transitions. [2021-06-05 21:28:50,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:28:50,188 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:50,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:50,340 INFO L225 Difference]: With dead ends: 90021 [2021-06-05 21:28:50,341 INFO L226 Difference]: Without dead ends: 90021 [2021-06-05 21:28:50,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=323, Invalid=733, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:28:50,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90021 states. [2021-06-05 21:28:52,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90021 to 89587. [2021-06-05 21:28:52,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89587 states, 89586 states have (on average 3.0424173419954013) internal successors, (272558), 89586 states have internal predecessors, (272558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:52,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89587 states to 89587 states and 272558 transitions. [2021-06-05 21:28:52,333 INFO L78 Accepts]: Start accepts. Automaton has 89587 states and 272558 transitions. Word has length 22 [2021-06-05 21:28:52,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:52,333 INFO L482 AbstractCegarLoop]: Abstraction has 89587 states and 272558 transitions. [2021-06-05 21:28:52,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:52,333 INFO L276 IsEmpty]: Start isEmpty. Operand 89587 states and 272558 transitions. [2021-06-05 21:28:52,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:52,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:52,357 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:52,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9964,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:52,558 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:52,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:52,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1126599027, now seen corresponding path program 255 times [2021-06-05 21:28:52,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:52,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76103111] [2021-06-05 21:28:52,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:52,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:52,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76103111] [2021-06-05 21:28:52,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76103111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:52,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799669690] [2021-06-05 21:28:52,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:52,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:28:52,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:52,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:52,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:52,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799669690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:52,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:52,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 21:28:52,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232150844] [2021-06-05 21:28:52,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:28:52,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:52,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:28:52,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:52,733 INFO L87 Difference]: Start difference. First operand 89587 states and 272558 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:53,307 INFO L93 Difference]: Finished difference Result 91085 states and 276674 transitions. [2021-06-05 21:28:53,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:28:53,307 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:53,467 INFO L225 Difference]: With dead ends: 91085 [2021-06-05 21:28:53,467 INFO L226 Difference]: Without dead ends: 91085 [2021-06-05 21:28:53,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 282.1ms TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:28:53,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91085 states. [2021-06-05 21:28:55,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91085 to 87184. [2021-06-05 21:28:55,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87184 states, 87183 states have (on average 3.043563538763291) internal successors, (265347), 87183 states have internal predecessors, (265347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:55,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87184 states to 87184 states and 265347 transitions. [2021-06-05 21:28:55,425 INFO L78 Accepts]: Start accepts. Automaton has 87184 states and 265347 transitions. Word has length 22 [2021-06-05 21:28:55,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:55,425 INFO L482 AbstractCegarLoop]: Abstraction has 87184 states and 265347 transitions. [2021-06-05 21:28:55,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:55,425 INFO L276 IsEmpty]: Start isEmpty. Operand 87184 states and 265347 transitions. [2021-06-05 21:28:55,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:55,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:55,448 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:55,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9965 [2021-06-05 21:28:55,653 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:55,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:55,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1763065881, now seen corresponding path program 256 times [2021-06-05 21:28:55,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:55,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665009794] [2021-06-05 21:28:55,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:55,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:55,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665009794] [2021-06-05 21:28:55,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665009794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:55,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511216782] [2021-06-05 21:28:55,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:55,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:55,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:55,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:55,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:55,818 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:55,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511216782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:55,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:55,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 21:28:55,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444573157] [2021-06-05 21:28:55,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:28:55,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:55,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:28:55,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:55,819 INFO L87 Difference]: Start difference. First operand 87184 states and 265347 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:56,483 INFO L93 Difference]: Finished difference Result 89148 states and 270843 transitions. [2021-06-05 21:28:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 21:28:56,484 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:56,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:56,646 INFO L225 Difference]: With dead ends: 89148 [2021-06-05 21:28:56,646 INFO L226 Difference]: Without dead ends: 89148 [2021-06-05 21:28:56,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 369.4ms TimeCoverageRelationStatistics Valid=790, Invalid=1562, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 21:28:57,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89148 states. [2021-06-05 21:28:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89148 to 87528. [2021-06-05 21:28:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87528 states, 87527 states have (on average 3.0433923246541066) internal successors, (266379), 87527 states have internal predecessors, (266379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:58,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87528 states to 87528 states and 266379 transitions. [2021-06-05 21:28:58,635 INFO L78 Accepts]: Start accepts. Automaton has 87528 states and 266379 transitions. Word has length 22 [2021-06-05 21:28:58,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:58,635 INFO L482 AbstractCegarLoop]: Abstraction has 87528 states and 266379 transitions. [2021-06-05 21:28:58,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:58,635 INFO L276 IsEmpty]: Start isEmpty. Operand 87528 states and 266379 transitions. [2021-06-05 21:28:58,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:28:58,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:58,660 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:58,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9966,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:58,862 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:58,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:58,863 INFO L82 PathProgramCache]: Analyzing trace with hash -18701875, now seen corresponding path program 257 times [2021-06-05 21:28:58,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:58,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798114997] [2021-06-05 21:28:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:58,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:58,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798114997] [2021-06-05 21:28:58,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798114997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:58,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144653327] [2021-06-05 21:28:58,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:58,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:28:58,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:58,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:28:58,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:59,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144653327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:59,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:59,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 21:28:59,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212395302] [2021-06-05 21:28:59,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:28:59,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:59,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:28:59,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:59,035 INFO L87 Difference]: Start difference. First operand 87528 states and 266379 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:59,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:59,709 INFO L93 Difference]: Finished difference Result 89118 states and 270691 transitions. [2021-06-05 21:28:59,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 21:28:59,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:28:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:59,859 INFO L225 Difference]: With dead ends: 89118 [2021-06-05 21:28:59,859 INFO L226 Difference]: Without dead ends: 89118 [2021-06-05 21:28:59,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=807, Invalid=1643, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 21:29:00,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89118 states. [2021-06-05 21:29:01,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89118 to 87510. [2021-06-05 21:29:01,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87510 states, 87509 states have (on average 3.043401250157127) internal successors, (266325), 87509 states have internal predecessors, (266325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:01,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87510 states to 87510 states and 266325 transitions. [2021-06-05 21:29:01,829 INFO L78 Accepts]: Start accepts. Automaton has 87510 states and 266325 transitions. Word has length 22 [2021-06-05 21:29:01,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:01,829 INFO L482 AbstractCegarLoop]: Abstraction has 87510 states and 266325 transitions. [2021-06-05 21:29:01,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:01,829 INFO L276 IsEmpty]: Start isEmpty. Operand 87510 states and 266325 transitions. [2021-06-05 21:29:01,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:29:01,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:01,852 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:02,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9967,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:02,053 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:02,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:02,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1303353945, now seen corresponding path program 258 times [2021-06-05 21:29:02,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:02,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949448930] [2021-06-05 21:29:02,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:02,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:02,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949448930] [2021-06-05 21:29:02,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949448930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:02,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761644121] [2021-06-05 21:29:02,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:02,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:29:02,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:02,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:29:02,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:02,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761644121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:02,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:02,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 21:29:02,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002447031] [2021-06-05 21:29:02,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:29:02,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:02,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:29:02,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:29:02,219 INFO L87 Difference]: Start difference. First operand 87510 states and 266325 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:02,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:02,727 INFO L93 Difference]: Finished difference Result 87690 states and 266541 transitions. [2021-06-05 21:29:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:29:02,728 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:29:02,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:02,893 INFO L225 Difference]: With dead ends: 87690 [2021-06-05 21:29:02,894 INFO L226 Difference]: Without dead ends: 87686 [2021-06-05 21:29:02,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=313, Invalid=617, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:29:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87686 states. [2021-06-05 21:29:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87686 to 87508. [2021-06-05 21:29:04,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87508 states, 87507 states have (on average 3.0434250974207777) internal successors, (266321), 87507 states have internal predecessors, (266321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87508 states to 87508 states and 266321 transitions. [2021-06-05 21:29:04,938 INFO L78 Accepts]: Start accepts. Automaton has 87508 states and 266321 transitions. Word has length 22 [2021-06-05 21:29:04,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:04,938 INFO L482 AbstractCegarLoop]: Abstraction has 87508 states and 266321 transitions. [2021-06-05 21:29:04,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 87508 states and 266321 transitions. [2021-06-05 21:29:04,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:29:04,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:04,962 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:05,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9968,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:05,162 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:05,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:05,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1535013223, now seen corresponding path program 259 times [2021-06-05 21:29:05,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:05,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252591046] [2021-06-05 21:29:05,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:05,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:05,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252591046] [2021-06-05 21:29:05,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252591046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:05,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985596439] [2021-06-05 21:29:05,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:05,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:29:05,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:05,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985596439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:05,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:05,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-06-05 21:29:05,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313445796] [2021-06-05 21:29:05,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:29:05,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:05,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:29:05,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:29:05,340 INFO L87 Difference]: Start difference. First operand 87508 states and 266321 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:06,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:06,072 INFO L93 Difference]: Finished difference Result 97092 states and 294572 transitions. [2021-06-05 21:29:06,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:29:06,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:29:06,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:06,242 INFO L225 Difference]: With dead ends: 97092 [2021-06-05 21:29:06,242 INFO L226 Difference]: Without dead ends: 97092 [2021-06-05 21:29:06,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 400.3ms TimeCoverageRelationStatistics Valid=799, Invalid=1651, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 21:29:06,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97092 states. [2021-06-05 21:29:08,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97092 to 93336. [2021-06-05 21:29:08,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93336 states, 93335 states have (on average 3.0407457009696257) internal successors, (283808), 93335 states have internal predecessors, (283808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93336 states to 93336 states and 283808 transitions. [2021-06-05 21:29:08,416 INFO L78 Accepts]: Start accepts. Automaton has 93336 states and 283808 transitions. Word has length 22 [2021-06-05 21:29:08,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:08,417 INFO L482 AbstractCegarLoop]: Abstraction has 93336 states and 283808 transitions. [2021-06-05 21:29:08,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:08,417 INFO L276 IsEmpty]: Start isEmpty. Operand 93336 states and 283808 transitions. [2021-06-05 21:29:08,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:29:08,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:08,446 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:08,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9969 [2021-06-05 21:29:08,646 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:08,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:08,647 INFO L82 PathProgramCache]: Analyzing trace with hash -224277439, now seen corresponding path program 260 times [2021-06-05 21:29:08,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:08,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411073149] [2021-06-05 21:29:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:08,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:08,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411073149] [2021-06-05 21:29:08,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411073149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:08,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171854803] [2021-06-05 21:29:08,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:08,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:08,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:08,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:29:08,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:08,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171854803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:08,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:08,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-06-05 21:29:08,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157351223] [2021-06-05 21:29:08,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:29:08,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:08,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:29:08,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:29:08,857 INFO L87 Difference]: Start difference. First operand 93336 states and 283808 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:09,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:09,922 INFO L93 Difference]: Finished difference Result 97575 states and 296111 transitions. [2021-06-05 21:29:09,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 21:29:09,937 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:29:09,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:10,187 INFO L225 Difference]: With dead ends: 97575 [2021-06-05 21:29:10,187 INFO L226 Difference]: Without dead ends: 97575 [2021-06-05 21:29:10,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 361.9ms TimeCoverageRelationStatistics Valid=669, Invalid=1401, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 21:29:10,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97575 states. [2021-06-05 21:29:11,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97575 to 96000. [2021-06-05 21:29:11,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96000 states, 95999 states have (on average 3.0396149959895418) internal successors, (291800), 95999 states have internal predecessors, (291800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96000 states to 96000 states and 291800 transitions. [2021-06-05 21:29:11,938 INFO L78 Accepts]: Start accepts. Automaton has 96000 states and 291800 transitions. Word has length 22 [2021-06-05 21:29:11,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:11,938 INFO L482 AbstractCegarLoop]: Abstraction has 96000 states and 291800 transitions. [2021-06-05 21:29:11,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:11,939 INFO L276 IsEmpty]: Start isEmpty. Operand 96000 states and 291800 transitions. [2021-06-05 21:29:11,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:29:11,969 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:11,969 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:12,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9970,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:12,170 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:12,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:12,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1520086567, now seen corresponding path program 261 times [2021-06-05 21:29:12,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:12,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926029702] [2021-06-05 21:29:12,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:12,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:12,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926029702] [2021-06-05 21:29:12,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926029702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:12,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077661985] [2021-06-05 21:29:12,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:12,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:29:12,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:12,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:29:12,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:12,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077661985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:12,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:12,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-06-05 21:29:12,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129500429] [2021-06-05 21:29:12,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:29:12,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:12,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:29:12,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:29:12,360 INFO L87 Difference]: Start difference. First operand 96000 states and 291800 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:13,323 INFO L93 Difference]: Finished difference Result 98465 states and 298743 transitions. [2021-06-05 21:29:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 21:29:13,324 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:29:13,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:13,502 INFO L225 Difference]: With dead ends: 98465 [2021-06-05 21:29:13,503 INFO L226 Difference]: Without dead ends: 98465 [2021-06-05 21:29:13,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 366.7ms TimeCoverageRelationStatistics Valid=691, Invalid=1471, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:29:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98465 states. [2021-06-05 21:29:15,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98465 to 96553. [2021-06-05 21:29:15,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96553 states, 96552 states have (on average 3.0393881017482807) internal successors, (293459), 96552 states have internal predecessors, (293459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:15,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96553 states to 96553 states and 293459 transitions. [2021-06-05 21:29:15,838 INFO L78 Accepts]: Start accepts. Automaton has 96553 states and 293459 transitions. Word has length 22 [2021-06-05 21:29:15,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:15,838 INFO L482 AbstractCegarLoop]: Abstraction has 96553 states and 293459 transitions. [2021-06-05 21:29:15,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:15,838 INFO L276 IsEmpty]: Start isEmpty. Operand 96553 states and 293459 transitions. [2021-06-05 21:29:15,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:29:15,872 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:15,872 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:16,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9971 [2021-06-05 21:29:16,073 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:16,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:16,073 INFO L82 PathProgramCache]: Analyzing trace with hash -761242551, now seen corresponding path program 262 times [2021-06-05 21:29:16,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:16,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534588166] [2021-06-05 21:29:16,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:16,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:16,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534588166] [2021-06-05 21:29:16,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534588166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:16,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298268918] [2021-06-05 21:29:16,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:16,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:16,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:16,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:29:16,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:16,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298268918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:16,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:16,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-06-05 21:29:16,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79331455] [2021-06-05 21:29:16,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:29:16,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:16,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:29:16,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:29:16,230 INFO L87 Difference]: Start difference. First operand 96553 states and 293459 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:16,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:16,741 INFO L93 Difference]: Finished difference Result 96926 states and 294310 transitions. [2021-06-05 21:29:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:29:16,741 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:29:16,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:16,914 INFO L225 Difference]: With dead ends: 96926 [2021-06-05 21:29:16,914 INFO L226 Difference]: Without dead ends: 96924 [2021-06-05 21:29:16,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:29:16,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96924 states. [2021-06-05 21:29:18,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96924 to 96774. [2021-06-05 21:29:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96774 states, 96773 states have (on average 3.0395564878633503) internal successors, (294147), 96773 states have internal predecessors, (294147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96774 states to 96774 states and 294147 transitions. [2021-06-05 21:29:19,069 INFO L78 Accepts]: Start accepts. Automaton has 96774 states and 294147 transitions. Word has length 22 [2021-06-05 21:29:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:19,069 INFO L482 AbstractCegarLoop]: Abstraction has 96774 states and 294147 transitions. [2021-06-05 21:29:19,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 96774 states and 294147 transitions. [2021-06-05 21:29:19,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:29:19,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:19,103 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:19,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9972 [2021-06-05 21:29:19,304 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:19,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:19,304 INFO L82 PathProgramCache]: Analyzing trace with hash 956506509, now seen corresponding path program 263 times [2021-06-05 21:29:19,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:19,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088798933] [2021-06-05 21:29:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:19,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:19,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088798933] [2021-06-05 21:29:19,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088798933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:19,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427704147] [2021-06-05 21:29:19,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:19,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:29:19,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:19,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:29:19,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:19,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427704147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:19,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:19,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-06-05 21:29:19,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364881221] [2021-06-05 21:29:19,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:29:19,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:19,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:29:19,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:29:19,482 INFO L87 Difference]: Start difference. First operand 96774 states and 294147 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:19,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:19,971 INFO L93 Difference]: Finished difference Result 98650 states and 299438 transitions. [2021-06-05 21:29:19,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:29:19,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:29:19,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:20,159 INFO L225 Difference]: With dead ends: 98650 [2021-06-05 21:29:20,159 INFO L226 Difference]: Without dead ends: 98650 [2021-06-05 21:29:20,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 185.9ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:29:20,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98650 states. [2021-06-05 21:29:22,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98650 to 96776. [2021-06-05 21:29:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96776 states, 96775 states have (on average 3.0395556703694138) internal successors, (294153), 96775 states have internal predecessors, (294153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96776 states to 96776 states and 294153 transitions. [2021-06-05 21:29:22,401 INFO L78 Accepts]: Start accepts. Automaton has 96776 states and 294153 transitions. Word has length 22 [2021-06-05 21:29:22,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:22,401 INFO L482 AbstractCegarLoop]: Abstraction has 96776 states and 294153 transitions. [2021-06-05 21:29:22,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:22,401 INFO L276 IsEmpty]: Start isEmpty. Operand 96776 states and 294153 transitions. [2021-06-05 21:29:22,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:29:22,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:22,432 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:22,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9973 [2021-06-05 21:29:22,632 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:22,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:22,633 INFO L82 PathProgramCache]: Analyzing trace with hash -772540825, now seen corresponding path program 264 times [2021-06-05 21:29:22,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:22,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294315059] [2021-06-05 21:29:22,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:22,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:22,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294315059] [2021-06-05 21:29:22,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294315059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:22,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344790398] [2021-06-05 21:29:22,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:22,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:29:22,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:22,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:29:22,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:22,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344790398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:22,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:22,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-06-05 21:29:22,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554105981] [2021-06-05 21:29:22,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:29:22,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:22,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:29:22,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:29:22,804 INFO L87 Difference]: Start difference. First operand 96776 states and 294153 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:23,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:23,350 INFO L93 Difference]: Finished difference Result 100367 states and 304534 transitions. [2021-06-05 21:29:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:29:23,351 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:29:23,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:23,536 INFO L225 Difference]: With dead ends: 100367 [2021-06-05 21:29:23,536 INFO L226 Difference]: Without dead ends: 100367 [2021-06-05 21:29:23,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:29:23,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100367 states. [2021-06-05 21:29:25,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100367 to 96786. [2021-06-05 21:29:25,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96786 states, 96785 states have (on average 3.0395515834065194) internal successors, (294183), 96785 states have internal predecessors, (294183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96786 states to 96786 states and 294183 transitions. [2021-06-05 21:29:25,817 INFO L78 Accepts]: Start accepts. Automaton has 96786 states and 294183 transitions. Word has length 22 [2021-06-05 21:29:25,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:25,817 INFO L482 AbstractCegarLoop]: Abstraction has 96786 states and 294183 transitions. [2021-06-05 21:29:25,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:25,817 INFO L276 IsEmpty]: Start isEmpty. Operand 96786 states and 294183 transitions. [2021-06-05 21:29:25,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:29:25,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:25,849 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:26,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9974 [2021-06-05 21:29:26,049 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:26,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:26,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1461566669, now seen corresponding path program 265 times [2021-06-05 21:29:26,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:26,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71460961] [2021-06-05 21:29:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:26,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:26,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71460961] [2021-06-05 21:29:26,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71460961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:26,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133898233] [2021-06-05 21:29:26,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:26,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:29:26,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:26,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133898233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:26,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:26,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-06-05 21:29:26,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100465327] [2021-06-05 21:29:26,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:29:26,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:26,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:29:26,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:29:26,221 INFO L87 Difference]: Start difference. First operand 96786 states and 294183 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:27,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:27,233 INFO L93 Difference]: Finished difference Result 103852 states and 314875 transitions. [2021-06-05 21:29:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:29:27,249 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:29:27,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:27,532 INFO L225 Difference]: With dead ends: 103852 [2021-06-05 21:29:27,533 INFO L226 Difference]: Without dead ends: 103852 [2021-06-05 21:29:27,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 252.7ms TimeCoverageRelationStatistics Valid=443, Invalid=963, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:29:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103852 states. [2021-06-05 21:29:29,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103852 to 100467. [2021-06-05 21:29:29,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100467 states, 100466 states have (on average 3.0390181753030876) internal successors, (305318), 100466 states have internal predecessors, (305318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100467 states to 100467 states and 305318 transitions. [2021-06-05 21:29:29,445 INFO L78 Accepts]: Start accepts. Automaton has 100467 states and 305318 transitions. Word has length 22 [2021-06-05 21:29:29,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:29,445 INFO L482 AbstractCegarLoop]: Abstraction has 100467 states and 305318 transitions. [2021-06-05 21:29:29,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:29,445 INFO L276 IsEmpty]: Start isEmpty. Operand 100467 states and 305318 transitions. [2021-06-05 21:29:29,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:29:29,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:29,477 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:29,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9975 [2021-06-05 21:29:29,677 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:29,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:29,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1999422247, now seen corresponding path program 266 times [2021-06-05 21:29:29,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:29,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142196651] [2021-06-05 21:29:29,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:29,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:29,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142196651] [2021-06-05 21:29:29,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142196651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:29,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808304421] [2021-06-05 21:29:29,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:29,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:29,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:29,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:29:29,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:29,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808304421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:29,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:29,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-06-05 21:29:29,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927490087] [2021-06-05 21:29:29,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:29:29,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:29,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:29:29,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:29:29,871 INFO L87 Difference]: Start difference. First operand 100467 states and 305318 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:30,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:30,934 INFO L93 Difference]: Finished difference Result 117624 states and 356391 transitions. [2021-06-05 21:29:30,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:29:30,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:29:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:31,161 INFO L225 Difference]: With dead ends: 117624 [2021-06-05 21:29:31,161 INFO L226 Difference]: Without dead ends: 117624 [2021-06-05 21:29:31,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 314.7ms TimeCoverageRelationStatistics Valid=533, Invalid=1189, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:29:31,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117624 states. [2021-06-05 21:29:33,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117624 to 114603. [2021-06-05 21:29:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114603 states, 114602 states have (on average 3.0346416292909373) internal successors, (347776), 114602 states have internal predecessors, (347776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:33,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114603 states to 114603 states and 347776 transitions. [2021-06-05 21:29:33,593 INFO L78 Accepts]: Start accepts. Automaton has 114603 states and 347776 transitions. Word has length 22 [2021-06-05 21:29:33,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:33,593 INFO L482 AbstractCegarLoop]: Abstraction has 114603 states and 347776 transitions. [2021-06-05 21:29:33,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:33,593 INFO L276 IsEmpty]: Start isEmpty. Operand 114603 states and 347776 transitions. [2021-06-05 21:29:33,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:29:33,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:33,625 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:33,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9976,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:33,826 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:33,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:33,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1493075981, now seen corresponding path program 267 times [2021-06-05 21:29:33,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:33,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146848693] [2021-06-05 21:29:33,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:33,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:33,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146848693] [2021-06-05 21:29:33,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146848693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:33,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183935476] [2021-06-05 21:29:33,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:33,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:29:33,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:33,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:29:33,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:34,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183935476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:34,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:34,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-06-05 21:29:34,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911160154] [2021-06-05 21:29:34,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:29:34,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:34,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:29:34,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:29:34,005 INFO L87 Difference]: Start difference. First operand 114603 states and 347776 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:34,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:34,696 INFO L93 Difference]: Finished difference Result 117101 states and 354865 transitions. [2021-06-05 21:29:34,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:29:34,697 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:29:34,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:35,665 INFO L225 Difference]: With dead ends: 117101 [2021-06-05 21:29:35,666 INFO L226 Difference]: Without dead ends: 117101 [2021-06-05 21:29:35,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:29:35,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117101 states. [2021-06-05 21:29:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117101 to 114723. [2021-06-05 21:29:37,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114723 states, 114722 states have (on average 3.034596677184847) internal successors, (348135), 114722 states have internal predecessors, (348135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:37,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114723 states to 114723 states and 348135 transitions. [2021-06-05 21:29:37,874 INFO L78 Accepts]: Start accepts. Automaton has 114723 states and 348135 transitions. Word has length 22 [2021-06-05 21:29:37,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:37,874 INFO L482 AbstractCegarLoop]: Abstraction has 114723 states and 348135 transitions. [2021-06-05 21:29:37,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:37,874 INFO L276 IsEmpty]: Start isEmpty. Operand 114723 states and 348135 transitions. [2021-06-05 21:29:37,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:29:37,908 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:37,908 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:38,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9977,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:38,108 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:38,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:38,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1318756377, now seen corresponding path program 268 times [2021-06-05 21:29:38,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:38,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588393667] [2021-06-05 21:29:38,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:38,537 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 21:29:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:38,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:38,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588393667] [2021-06-05 21:29:38,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588393667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:38,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948203969] [2021-06-05 21:29:38,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:38,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:38,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:38,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:29:38,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:38,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948203969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:38,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:38,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-06-05 21:29:38,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658696972] [2021-06-05 21:29:38,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:29:38,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:38,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:29:38,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:29:38,777 INFO L87 Difference]: Start difference. First operand 114723 states and 348135 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:39,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:39,426 INFO L93 Difference]: Finished difference Result 129613 states and 392477 transitions. [2021-06-05 21:29:39,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:29:39,426 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:29:39,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:39,692 INFO L225 Difference]: With dead ends: 129613 [2021-06-05 21:29:39,692 INFO L226 Difference]: Without dead ends: 129613 [2021-06-05 21:29:39,693 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 670.7ms TimeCoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:29:39,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129613 states. [2021-06-05 21:29:42,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129613 to 128238. [2021-06-05 21:29:42,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128238 states, 128237 states have (on average 3.0310128901954974) internal successors, (388688), 128237 states have internal predecessors, (388688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:42,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128238 states to 128238 states and 388688 transitions. [2021-06-05 21:29:42,467 INFO L78 Accepts]: Start accepts. Automaton has 128238 states and 388688 transitions. Word has length 22 [2021-06-05 21:29:42,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:42,467 INFO L482 AbstractCegarLoop]: Abstraction has 128238 states and 388688 transitions. [2021-06-05 21:29:42,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:42,467 INFO L276 IsEmpty]: Start isEmpty. Operand 128238 states and 388688 transitions. [2021-06-05 21:29:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:29:42,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:42,502 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:42,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9978,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:42,702 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:42,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:42,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1708753741, now seen corresponding path program 269 times [2021-06-05 21:29:42,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:42,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127890941] [2021-06-05 21:29:42,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:42,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:42,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127890941] [2021-06-05 21:29:42,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127890941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:42,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837075216] [2021-06-05 21:29:42,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:42,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:29:42,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:42,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:29:42,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:42,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837075216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:42,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:42,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-06-05 21:29:42,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422530137] [2021-06-05 21:29:42,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:29:42,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:42,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:29:42,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:29:42,892 INFO L87 Difference]: Start difference. First operand 128238 states and 388688 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:43,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:43,996 INFO L93 Difference]: Finished difference Result 131498 states and 398224 transitions. [2021-06-05 21:29:43,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:29:43,997 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:29:43,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:44,269 INFO L225 Difference]: With dead ends: 131498 [2021-06-05 21:29:44,270 INFO L226 Difference]: Without dead ends: 131498 [2021-06-05 21:29:44,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 728.6ms TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:29:44,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131498 states. [2021-06-05 21:29:46,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131498 to 130639. [2021-06-05 21:29:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130639 states, 130638 states have (on average 3.0304429032900075) internal successors, (395891), 130638 states have internal predecessors, (395891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:47,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130639 states to 130639 states and 395891 transitions. [2021-06-05 21:29:47,013 INFO L78 Accepts]: Start accepts. Automaton has 130639 states and 395891 transitions. Word has length 22 [2021-06-05 21:29:47,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:47,013 INFO L482 AbstractCegarLoop]: Abstraction has 130639 states and 395891 transitions. [2021-06-05 21:29:47,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:47,013 INFO L276 IsEmpty]: Start isEmpty. Operand 130639 states and 395891 transitions. [2021-06-05 21:29:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:29:47,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:47,049 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:47,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9979,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:47,253 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:47,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1072286887, now seen corresponding path program 270 times [2021-06-05 21:29:47,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:47,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988484582] [2021-06-05 21:29:47,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:47,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:47,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988484582] [2021-06-05 21:29:47,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988484582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:47,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667004629] [2021-06-05 21:29:47,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:47,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:29:47,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:47,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:29:47,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:47,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667004629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:47,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:47,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-06-05 21:29:47,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707476724] [2021-06-05 21:29:47,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:29:47,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:47,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:29:47,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:29:47,477 INFO L87 Difference]: Start difference. First operand 130639 states and 395891 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:48,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:48,762 INFO L93 Difference]: Finished difference Result 132410 states and 400904 transitions. [2021-06-05 21:29:48,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:29:48,763 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:29:48,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:49,036 INFO L225 Difference]: With dead ends: 132410 [2021-06-05 21:29:49,036 INFO L226 Difference]: Without dead ends: 132410 [2021-06-05 21:29:49,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 387.7ms TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:29:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132410 states. [2021-06-05 21:29:51,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132410 to 130698. [2021-06-05 21:29:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130698 states, 130697 states have (on average 3.030429160577519) internal successors, (396068), 130697 states have internal predecessors, (396068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:51,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130698 states to 130698 states and 396068 transitions. [2021-06-05 21:29:51,733 INFO L78 Accepts]: Start accepts. Automaton has 130698 states and 396068 transitions. Word has length 22 [2021-06-05 21:29:51,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:51,733 INFO L482 AbstractCegarLoop]: Abstraction has 130698 states and 396068 transitions. [2021-06-05 21:29:51,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:51,733 INFO L276 IsEmpty]: Start isEmpty. Operand 130698 states and 396068 transitions. [2021-06-05 21:29:51,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:29:51,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:51,775 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:51,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9980,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:51,985 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:51,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:51,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1478316403, now seen corresponding path program 271 times [2021-06-05 21:29:51,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:51,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762581267] [2021-06-05 21:29:51,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:52,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:52,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762581267] [2021-06-05 21:29:52,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762581267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:52,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252574436] [2021-06-05 21:29:52,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:52,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:29:52,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:52,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252574436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:52,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:52,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-06-05 21:29:52,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923466559] [2021-06-05 21:29:52,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:29:52,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:52,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:29:52,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:29:52,196 INFO L87 Difference]: Start difference. First operand 130698 states and 396068 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:53,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:53,422 INFO L93 Difference]: Finished difference Result 132757 states and 401917 transitions. [2021-06-05 21:29:53,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:29:53,423 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:29:53,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:53,697 INFO L225 Difference]: With dead ends: 132757 [2021-06-05 21:29:53,697 INFO L226 Difference]: Without dead ends: 132757 [2021-06-05 21:29:53,698 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 314.3ms TimeCoverageRelationStatistics Valid=507, Invalid=1215, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:29:53,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132757 states. [2021-06-05 21:29:56,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132757 to 131013. [2021-06-05 21:29:56,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131013 states, 131012 states have (on average 3.0303559979238543) internal successors, (397013), 131012 states have internal predecessors, (397013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:56,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131013 states to 131013 states and 397013 transitions. [2021-06-05 21:29:56,459 INFO L78 Accepts]: Start accepts. Automaton has 131013 states and 397013 transitions. Word has length 22 [2021-06-05 21:29:56,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:56,459 INFO L482 AbstractCegarLoop]: Abstraction has 131013 states and 397013 transitions. [2021-06-05 21:29:56,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:56,459 INFO L276 IsEmpty]: Start isEmpty. Operand 131013 states and 397013 transitions. [2021-06-05 21:29:56,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:29:56,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:56,497 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:56,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9981 [2021-06-05 21:29:56,697 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:56,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1057360231, now seen corresponding path program 272 times [2021-06-05 21:29:56,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:56,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953799715] [2021-06-05 21:29:56,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:56,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:56,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953799715] [2021-06-05 21:29:56,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953799715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:56,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853231134] [2021-06-05 21:29:56,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:56,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:56,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:56,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:29:56,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:56,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853231134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:56,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:56,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-06-05 21:29:56,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847840982] [2021-06-05 21:29:56,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:29:56,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:56,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:29:56,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:56,912 INFO L87 Difference]: Start difference. First operand 131013 states and 397013 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 21:29:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:58,278 INFO L93 Difference]: Finished difference Result 135540 states and 410128 transitions. [2021-06-05 21:29:58,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 21:29:58,279 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:29:58,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:58,554 INFO L225 Difference]: With dead ends: 135540 [2021-06-05 21:29:58,554 INFO L226 Difference]: Without dead ends: 135540 [2021-06-05 21:29:58,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 415.9ms TimeCoverageRelationStatistics Valid=851, Invalid=1905, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 21:29:58,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135540 states. [2021-06-05 21:30:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135540 to 131079. [2021-06-05 21:30:00,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131079 states, 131078 states have (on average 3.0303407131631546) internal successors, (397211), 131078 states have internal predecessors, (397211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131079 states to 131079 states and 397211 transitions. [2021-06-05 21:30:01,292 INFO L78 Accepts]: Start accepts. Automaton has 131079 states and 397211 transitions. Word has length 22 [2021-06-05 21:30:01,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:01,292 INFO L482 AbstractCegarLoop]: Abstraction has 131079 states and 397211 transitions. [2021-06-05 21:30:01,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 21:30:01,292 INFO L276 IsEmpty]: Start isEmpty. Operand 131079 states and 397211 transitions. [2021-06-05 21:30:01,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:30:01,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:01,333 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:01,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9982,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:01,534 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:01,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:01,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1384664402, now seen corresponding path program 273 times [2021-06-05 21:30:01,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:01,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321549473] [2021-06-05 21:30:01,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:01,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:01,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321549473] [2021-06-05 21:30:01,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321549473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:01,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472981146] [2021-06-05 21:30:01,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:01,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:30:01,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:01,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:30:01,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:01,719 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:01,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472981146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:01,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:01,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 21:30:01,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316307737] [2021-06-05 21:30:01,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:30:01,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:01,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:30:01,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:30:01,720 INFO L87 Difference]: Start difference. First operand 131079 states and 397211 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:02,974 INFO L93 Difference]: Finished difference Result 131316 states and 397574 transitions. [2021-06-05 21:30:02,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:30:02,975 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:30:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:03,258 INFO L225 Difference]: With dead ends: 131316 [2021-06-05 21:30:03,258 INFO L226 Difference]: Without dead ends: 131310 [2021-06-05 21:30:03,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 199.8ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:30:03,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131310 states. [2021-06-05 21:30:05,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131310 to 131104. [2021-06-05 21:30:05,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.0301594929177824) internal successors, (397263), 131103 states have internal predecessors, (397263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397263 transitions. [2021-06-05 21:30:06,299 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397263 transitions. Word has length 24 [2021-06-05 21:30:06,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:06,299 INFO L482 AbstractCegarLoop]: Abstraction has 131104 states and 397263 transitions. [2021-06-05 21:30:06,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:06,299 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397263 transitions. [2021-06-05 21:30:06,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:30:06,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:06,348 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:06,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9983 [2021-06-05 21:30:06,548 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:06,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1036551628, now seen corresponding path program 274 times [2021-06-05 21:30:06,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:06,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211357050] [2021-06-05 21:30:06,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:06,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:06,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211357050] [2021-06-05 21:30:06,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211357050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:06,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800587293] [2021-06-05 21:30:06,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:06,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:06,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:06,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:30:06,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:06,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800587293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:06,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:06,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 19 [2021-06-05 21:30:06,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183599861] [2021-06-05 21:30:06,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:30:06,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:06,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:30:06,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:30:06,755 INFO L87 Difference]: Start difference. First operand 131104 states and 397263 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 21:30:08,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:08,133 INFO L93 Difference]: Finished difference Result 131229 states and 397402 transitions. [2021-06-05 21:30:08,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:30:08,133 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 24 [2021-06-05 21:30:08,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:08,444 INFO L225 Difference]: With dead ends: 131229 [2021-06-05 21:30:08,444 INFO L226 Difference]: Without dead ends: 131229 [2021-06-05 21:30:08,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:30:08,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131229 states. [2021-06-05 21:30:10,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131229 to 131082. [2021-06-05 21:30:10,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131082 states, 131081 states have (on average 3.0302637300600392) internal successors, (397210), 131081 states have internal predecessors, (397210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131082 states to 131082 states and 397210 transitions. [2021-06-05 21:30:11,160 INFO L78 Accepts]: Start accepts. Automaton has 131082 states and 397210 transitions. Word has length 24 [2021-06-05 21:30:11,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:11,160 INFO L482 AbstractCegarLoop]: Abstraction has 131082 states and 397210 transitions. [2021-06-05 21:30:11,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 21:30:11,160 INFO L276 IsEmpty]: Start isEmpty. Operand 131082 states and 397210 transitions. [2021-06-05 21:30:11,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:30:11,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:11,210 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:11,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9984 [2021-06-05 21:30:11,410 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:11,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:11,411 INFO L82 PathProgramCache]: Analyzing trace with hash -757952152, now seen corresponding path program 275 times [2021-06-05 21:30:11,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:11,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937475589] [2021-06-05 21:30:11,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:11,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:11,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937475589] [2021-06-05 21:30:11,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937475589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:11,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849177104] [2021-06-05 21:30:11,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:11,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:30:11,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:11,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:30:11,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 75 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:30:11,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849177104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:11,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:11,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 19 [2021-06-05 21:30:11,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557364001] [2021-06-05 21:30:11,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:30:11,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:11,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:30:11,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:30:11,602 INFO L87 Difference]: Start difference. First operand 131082 states and 397210 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 21:30:12,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:12,223 INFO L93 Difference]: Finished difference Result 131237 states and 397440 transitions. [2021-06-05 21:30:12,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:30:12,224 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 24 [2021-06-05 21:30:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:13,057 INFO L225 Difference]: With dead ends: 131237 [2021-06-05 21:30:13,058 INFO L226 Difference]: Without dead ends: 131237 [2021-06-05 21:30:13,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:30:13,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131237 states. [2021-06-05 21:30:15,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131237 to 131093. [2021-06-05 21:30:15,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.0302077930003355) internal successors, (397236), 131092 states have internal predecessors, (397236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:15,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 397236 transitions. [2021-06-05 21:30:15,787 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 397236 transitions. Word has length 24 [2021-06-05 21:30:15,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:15,787 INFO L482 AbstractCegarLoop]: Abstraction has 131093 states and 397236 transitions. [2021-06-05 21:30:15,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 21:30:15,787 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 397236 transitions. [2021-06-05 21:30:15,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:30:15,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:15,834 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:16,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9985 [2021-06-05 21:30:16,034 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:16,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:16,035 INFO L82 PathProgramCache]: Analyzing trace with hash -711302988, now seen corresponding path program 276 times [2021-06-05 21:30:16,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:16,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574061958] [2021-06-05 21:30:16,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:16,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:16,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574061958] [2021-06-05 21:30:16,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574061958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:16,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374916922] [2021-06-05 21:30:16,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:16,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:30:16,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:16,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:30:16,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:16,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374916922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:16,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:16,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:30:16,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202591791] [2021-06-05 21:30:16,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:30:16,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:16,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:30:16,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:30:16,207 INFO L87 Difference]: Start difference. First operand 131093 states and 397236 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:16,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:16,824 INFO L93 Difference]: Finished difference Result 131154 states and 397359 transitions. [2021-06-05 21:30:16,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:30:16,825 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:30:16,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:17,125 INFO L225 Difference]: With dead ends: 131154 [2021-06-05 21:30:17,125 INFO L226 Difference]: Without dead ends: 131153 [2021-06-05 21:30:17,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:30:17,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131153 states. [2021-06-05 21:30:19,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131153 to 131093. [2021-06-05 21:30:19,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.030184908308669) internal successors, (397233), 131092 states have internal predecessors, (397233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 397233 transitions. [2021-06-05 21:30:20,419 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 397233 transitions. Word has length 24 [2021-06-05 21:30:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:20,419 INFO L482 AbstractCegarLoop]: Abstraction has 131093 states and 397233 transitions. [2021-06-05 21:30:20,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 397233 transitions. [2021-06-05 21:30:20,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:30:20,465 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:20,465 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:20,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9986 [2021-06-05 21:30:20,666 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:20,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:20,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1157400778, now seen corresponding path program 277 times [2021-06-05 21:30:20,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:20,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9011007] [2021-06-05 21:30:20,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:30:20,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:20,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9011007] [2021-06-05 21:30:20,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9011007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:20,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406418840] [2021-06-05 21:30:20,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:20,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:30:20,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:30:20,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406418840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:20,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:20,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:30:20,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570083177] [2021-06-05 21:30:20,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:30:20,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:20,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:30:20,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:30:20,800 INFO L87 Difference]: Start difference. First operand 131093 states and 397233 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:21,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:21,363 INFO L93 Difference]: Finished difference Result 131454 states and 397901 transitions. [2021-06-05 21:30:21,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:30:21,363 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:30:21,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:21,627 INFO L225 Difference]: With dead ends: 131454 [2021-06-05 21:30:21,627 INFO L226 Difference]: Without dead ends: 131452 [2021-06-05 21:30:21,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:30:21,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131452 states. [2021-06-05 21:30:24,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131452 to 131181. [2021-06-05 21:30:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131181 states, 131180 states have (on average 3.0299893276414087) internal successors, (397474), 131180 states have internal predecessors, (397474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:25,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131181 states to 131181 states and 397474 transitions. [2021-06-05 21:30:25,260 INFO L78 Accepts]: Start accepts. Automaton has 131181 states and 397474 transitions. Word has length 24 [2021-06-05 21:30:25,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:25,260 INFO L482 AbstractCegarLoop]: Abstraction has 131181 states and 397474 transitions. [2021-06-05 21:30:25,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 131181 states and 397474 transitions. [2021-06-05 21:30:25,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:30:25,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:25,314 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:25,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9987,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:25,515 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:25,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:25,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1392111828, now seen corresponding path program 278 times [2021-06-05 21:30:25,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:25,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468907181] [2021-06-05 21:30:25,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:30:25,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:25,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468907181] [2021-06-05 21:30:25,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468907181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:25,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689944280] [2021-06-05 21:30:25,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:25,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:25,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:25,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:30:25,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:30:25,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689944280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:25,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:25,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:30:25,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574562066] [2021-06-05 21:30:25,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:30:25,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:25,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:30:25,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:30:25,651 INFO L87 Difference]: Start difference. First operand 131181 states and 397474 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:26,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:26,262 INFO L93 Difference]: Finished difference Result 131473 states and 397928 transitions. [2021-06-05 21:30:26,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:30:26,262 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:30:26,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:26,525 INFO L225 Difference]: With dead ends: 131473 [2021-06-05 21:30:26,525 INFO L226 Difference]: Without dead ends: 131464 [2021-06-05 21:30:26,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:30:26,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131464 states. [2021-06-05 21:30:28,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131464 to 131129. [2021-06-05 21:30:29,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131129 states, 131128 states have (on average 3.030046976999573) internal successors, (397324), 131128 states have internal predecessors, (397324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:29,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131129 states to 131129 states and 397324 transitions. [2021-06-05 21:30:29,381 INFO L78 Accepts]: Start accepts. Automaton has 131129 states and 397324 transitions. Word has length 24 [2021-06-05 21:30:29,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:29,382 INFO L482 AbstractCegarLoop]: Abstraction has 131129 states and 397324 transitions. [2021-06-05 21:30:29,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:29,382 INFO L276 IsEmpty]: Start isEmpty. Operand 131129 states and 397324 transitions. [2021-06-05 21:30:29,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:30:29,429 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:29,429 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:29,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9988,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:29,629 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:29,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:29,629 INFO L82 PathProgramCache]: Analyzing trace with hash 318501480, now seen corresponding path program 279 times [2021-06-05 21:30:29,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:29,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768790530] [2021-06-05 21:30:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:30,097 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-05 21:30:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:30,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:30,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768790530] [2021-06-05 21:30:30,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768790530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:30,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588124934] [2021-06-05 21:30:30,123 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:30,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:30:30,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:30,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:30:30,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:30,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588124934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:30,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:30,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:30:30,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103934866] [2021-06-05 21:30:30,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:30:30,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:30,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:30:30,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:30:30,333 INFO L87 Difference]: Start difference. First operand 131129 states and 397324 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:30:30,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:30,872 INFO L93 Difference]: Finished difference Result 131345 states and 397633 transitions. [2021-06-05 21:30:30,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:30:30,873 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 24 [2021-06-05 21:30:30,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:31,152 INFO L225 Difference]: With dead ends: 131345 [2021-06-05 21:30:31,153 INFO L226 Difference]: Without dead ends: 131343 [2021-06-05 21:30:31,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 508.2ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:30:31,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131343 states. [2021-06-05 21:30:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131343 to 131121. [2021-06-05 21:30:33,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131121 states, 131120 states have (on average 3.0300030506406346) internal successors, (397294), 131120 states have internal predecessors, (397294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:34,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131121 states to 131121 states and 397294 transitions. [2021-06-05 21:30:34,006 INFO L78 Accepts]: Start accepts. Automaton has 131121 states and 397294 transitions. Word has length 24 [2021-06-05 21:30:34,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:34,006 INFO L482 AbstractCegarLoop]: Abstraction has 131121 states and 397294 transitions. [2021-06-05 21:30:34,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:30:34,006 INFO L276 IsEmpty]: Start isEmpty. Operand 131121 states and 397294 transitions. [2021-06-05 21:30:34,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:30:34,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:34,054 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:34,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9989,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:34,254 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:34,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:34,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1807906476, now seen corresponding path program 280 times [2021-06-05 21:30:34,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:34,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339941763] [2021-06-05 21:30:34,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:34,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:34,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339941763] [2021-06-05 21:30:34,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339941763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:34,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243124730] [2021-06-05 21:30:34,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:34,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:34,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:34,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:30:34,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 58 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:30:34,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243124730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:34,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:34,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-06-05 21:30:34,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668494922] [2021-06-05 21:30:34,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:30:34,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:34,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:30:34,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:30:34,425 INFO L87 Difference]: Start difference. First operand 131121 states and 397294 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:35,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:35,605 INFO L93 Difference]: Finished difference Result 131339 states and 397604 transitions. [2021-06-05 21:30:35,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:30:35,606 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:30:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:35,889 INFO L225 Difference]: With dead ends: 131339 [2021-06-05 21:30:35,889 INFO L226 Difference]: Without dead ends: 131336 [2021-06-05 21:30:35,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 174.9ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:30:35,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131336 states. [2021-06-05 21:30:38,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131336 to 131113. [2021-06-05 21:30:38,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131113 states, 131112 states have (on average 3.0299667459881627) internal successors, (397265), 131112 states have internal predecessors, (397265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:38,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131113 states to 131113 states and 397265 transitions. [2021-06-05 21:30:38,626 INFO L78 Accepts]: Start accepts. Automaton has 131113 states and 397265 transitions. Word has length 24 [2021-06-05 21:30:38,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:38,626 INFO L482 AbstractCegarLoop]: Abstraction has 131113 states and 397265 transitions. [2021-06-05 21:30:38,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 131113 states and 397265 transitions. [2021-06-05 21:30:38,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:30:38,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:38,674 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:38,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9990 [2021-06-05 21:30:38,874 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:38,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:38,875 INFO L82 PathProgramCache]: Analyzing trace with hash 734821096, now seen corresponding path program 281 times [2021-06-05 21:30:38,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:38,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822226205] [2021-06-05 21:30:38,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:38,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:38,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822226205] [2021-06-05 21:30:38,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822226205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:38,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718179399] [2021-06-05 21:30:38,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:38,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:30:38,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:38,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:30:38,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:30:39,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718179399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:39,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:39,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 21:30:39,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710379775] [2021-06-05 21:30:39,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:30:39,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:39,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:30:39,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:30:39,031 INFO L87 Difference]: Start difference. First operand 131113 states and 397265 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:40,533 INFO L93 Difference]: Finished difference Result 131264 states and 397507 transitions. [2021-06-05 21:30:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:30:40,533 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:30:40,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:40,927 INFO L225 Difference]: With dead ends: 131264 [2021-06-05 21:30:40,928 INFO L226 Difference]: Without dead ends: 131259 [2021-06-05 21:30:40,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 182.7ms TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:30:41,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131259 states. [2021-06-05 21:30:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131259 to 131113. [2021-06-05 21:30:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131113 states, 131112 states have (on average 3.029920983586552) internal successors, (397259), 131112 states have internal predecessors, (397259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131113 states to 131113 states and 397259 transitions. [2021-06-05 21:30:43,626 INFO L78 Accepts]: Start accepts. Automaton has 131113 states and 397259 transitions. Word has length 24 [2021-06-05 21:30:43,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:43,626 INFO L482 AbstractCegarLoop]: Abstraction has 131113 states and 397259 transitions. [2021-06-05 21:30:43,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:43,626 INFO L276 IsEmpty]: Start isEmpty. Operand 131113 states and 397259 transitions. [2021-06-05 21:30:43,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:30:43,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:43,681 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:43,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9991 [2021-06-05 21:30:43,882 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:43,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:43,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1943482834, now seen corresponding path program 282 times [2021-06-05 21:30:43,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:43,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377718759] [2021-06-05 21:30:43,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:30:43,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:43,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377718759] [2021-06-05 21:30:43,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377718759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:43,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472850396] [2021-06-05 21:30:43,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:43,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:30:43,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:43,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:30:43,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:30:44,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472850396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:44,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:44,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:30:44,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248415944] [2021-06-05 21:30:44,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:30:44,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:44,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:30:44,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:30:44,018 INFO L87 Difference]: Start difference. First operand 131113 states and 397259 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:44,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:44,579 INFO L93 Difference]: Finished difference Result 131472 states and 397913 transitions. [2021-06-05 21:30:44,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:30:44,579 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:30:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:44,844 INFO L225 Difference]: With dead ends: 131472 [2021-06-05 21:30:44,844 INFO L226 Difference]: Without dead ends: 131470 [2021-06-05 21:30:44,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:30:45,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131470 states. [2021-06-05 21:30:47,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131470 to 131189. [2021-06-05 21:30:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131189 states, 131188 states have (on average 3.0296902155684973) internal successors, (397459), 131188 states have internal predecessors, (397459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131189 states to 131189 states and 397459 transitions. [2021-06-05 21:30:48,052 INFO L78 Accepts]: Start accepts. Automaton has 131189 states and 397459 transitions. Word has length 24 [2021-06-05 21:30:48,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:48,052 INFO L482 AbstractCegarLoop]: Abstraction has 131189 states and 397459 transitions. [2021-06-05 21:30:48,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:48,052 INFO L276 IsEmpty]: Start isEmpty. Operand 131189 states and 397459 transitions. [2021-06-05 21:30:48,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:30:48,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:48,101 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:48,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9992,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:48,301 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:48,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:48,302 INFO L82 PathProgramCache]: Analyzing trace with hash -606029772, now seen corresponding path program 283 times [2021-06-05 21:30:48,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:48,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028909410] [2021-06-05 21:30:48,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:48,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:48,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028909410] [2021-06-05 21:30:48,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028909410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:48,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573970146] [2021-06-05 21:30:48,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:48,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:30:48,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:30:48,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573970146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:48,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:48,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:30:48,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235613320] [2021-06-05 21:30:48,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:30:48,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:48,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:30:48,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:30:48,443 INFO L87 Difference]: Start difference. First operand 131189 states and 397459 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:49,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:49,012 INFO L93 Difference]: Finished difference Result 131509 states and 397970 transitions. [2021-06-05 21:30:49,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:30:49,013 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:30:49,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:49,269 INFO L225 Difference]: With dead ends: 131509 [2021-06-05 21:30:49,269 INFO L226 Difference]: Without dead ends: 131502 [2021-06-05 21:30:49,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:30:49,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131502 states. [2021-06-05 21:30:51,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131502 to 131146. [2021-06-05 21:30:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131146 states, 131145 states have (on average 3.029646574402379) internal successors, (397323), 131145 states have internal predecessors, (397323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131146 states to 131146 states and 397323 transitions. [2021-06-05 21:30:52,704 INFO L78 Accepts]: Start accepts. Automaton has 131146 states and 397323 transitions. Word has length 24 [2021-06-05 21:30:52,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:52,705 INFO L482 AbstractCegarLoop]: Abstraction has 131146 states and 397323 transitions. [2021-06-05 21:30:52,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 131146 states and 397323 transitions. [2021-06-05 21:30:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:30:52,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:52,746 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:52,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9993 [2021-06-05 21:30:52,946 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:52,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:52,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1104583536, now seen corresponding path program 284 times [2021-06-05 21:30:52,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:52,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877071944] [2021-06-05 21:30:52,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:53,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:53,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877071944] [2021-06-05 21:30:53,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877071944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:53,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333908738] [2021-06-05 21:30:53,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:53,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:53,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:53,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:30:53,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:30:53,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333908738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:53,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:53,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-06-05 21:30:53,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316720935] [2021-06-05 21:30:53,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:30:53,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:53,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:30:53,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:30:53,095 INFO L87 Difference]: Start difference. First operand 131146 states and 397323 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:53,731 INFO L93 Difference]: Finished difference Result 131510 states and 397931 transitions. [2021-06-05 21:30:53,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:30:53,732 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:30:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:53,987 INFO L225 Difference]: With dead ends: 131510 [2021-06-05 21:30:53,987 INFO L226 Difference]: Without dead ends: 131508 [2021-06-05 21:30:53,987 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:30:54,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131508 states. [2021-06-05 21:30:56,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131508 to 131130. [2021-06-05 21:30:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131130 states, 131129 states have (on average 3.029581557092634) internal successors, (397266), 131129 states have internal predecessors, (397266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:56,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131130 states to 131130 states and 397266 transitions. [2021-06-05 21:30:56,813 INFO L78 Accepts]: Start accepts. Automaton has 131130 states and 397266 transitions. Word has length 24 [2021-06-05 21:30:56,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:56,813 INFO L482 AbstractCegarLoop]: Abstraction has 131130 states and 397266 transitions. [2021-06-05 21:30:56,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:56,813 INFO L276 IsEmpty]: Start isEmpty. Operand 131130 states and 397266 transitions. [2021-06-05 21:30:56,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:30:56,857 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:56,857 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:57,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9994 [2021-06-05 21:30:57,057 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:57,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:57,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1700978764, now seen corresponding path program 285 times [2021-06-05 21:30:57,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:57,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706407333] [2021-06-05 21:30:57,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:57,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:57,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706407333] [2021-06-05 21:30:57,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706407333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:57,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652919297] [2021-06-05 21:30:57,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:57,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:30:57,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:57,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:30:57,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:57,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652919297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:57,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:57,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:30:57,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402624448] [2021-06-05 21:30:57,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:30:57,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:57,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:30:57,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:30:57,726 INFO L87 Difference]: Start difference. First operand 131130 states and 397266 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:58,340 INFO L93 Difference]: Finished difference Result 131365 states and 397609 transitions. [2021-06-05 21:30:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:30:58,341 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:30:58,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:58,604 INFO L225 Difference]: With dead ends: 131365 [2021-06-05 21:30:58,604 INFO L226 Difference]: Without dead ends: 131362 [2021-06-05 21:30:58,605 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=279, Invalid=591, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:30:58,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131362 states. [2021-06-05 21:31:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131362 to 131116. [2021-06-05 21:31:01,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.029531327460626) internal successors, (397217), 131115 states have internal predecessors, (397217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397217 transitions. [2021-06-05 21:31:01,363 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397217 transitions. Word has length 24 [2021-06-05 21:31:01,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:01,363 INFO L482 AbstractCegarLoop]: Abstraction has 131116 states and 397217 transitions. [2021-06-05 21:31:01,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:01,363 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397217 transitions. [2021-06-05 21:31:01,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:31:01,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:01,407 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:01,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9995 [2021-06-05 21:31:01,607 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:01,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:01,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1520903152, now seen corresponding path program 286 times [2021-06-05 21:31:01,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:01,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333746696] [2021-06-05 21:31:01,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:01,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:01,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333746696] [2021-06-05 21:31:01,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333746696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:01,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370084108] [2021-06-05 21:31:01,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:01,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:31:01,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:01,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:31:01,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:31:01,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370084108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:01,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:01,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 21:31:01,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641241344] [2021-06-05 21:31:01,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:31:01,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:01,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:31:01,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:31:01,748 INFO L87 Difference]: Start difference. First operand 131116 states and 397217 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:02,346 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 21:31:02,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:02,908 INFO L93 Difference]: Finished difference Result 131356 states and 397566 transitions. [2021-06-05 21:31:02,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:31:02,909 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:31:02,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:03,184 INFO L225 Difference]: With dead ends: 131356 [2021-06-05 21:31:03,184 INFO L226 Difference]: Without dead ends: 131351 [2021-06-05 21:31:03,184 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 605.6ms TimeCoverageRelationStatistics Valid=316, Invalid=676, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:31:03,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131351 states. [2021-06-05 21:31:05,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131351 to 131116. [2021-06-05 21:31:05,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.0294016702894404) internal successors, (397200), 131115 states have internal predecessors, (397200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397200 transitions. [2021-06-05 21:31:05,998 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397200 transitions. Word has length 24 [2021-06-05 21:31:05,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:05,998 INFO L482 AbstractCegarLoop]: Abstraction has 131116 states and 397200 transitions. [2021-06-05 21:31:05,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397200 transitions. [2021-06-05 21:31:06,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:31:06,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:06,046 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:06,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9996 [2021-06-05 21:31:06,253 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:06,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:06,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1679972556, now seen corresponding path program 287 times [2021-06-05 21:31:06,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:06,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861329510] [2021-06-05 21:31:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:06,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:06,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861329510] [2021-06-05 21:31:06,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861329510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:06,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288670113] [2021-06-05 21:31:06,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:06,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 21:31:06,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:06,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:31:06,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:31:06,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288670113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:06,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:06,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 21:31:06,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356483270] [2021-06-05 21:31:06,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:31:06,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:06,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:31:06,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:31:06,415 INFO L87 Difference]: Start difference. First operand 131116 states and 397200 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:07,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:07,537 INFO L93 Difference]: Finished difference Result 131372 states and 397726 transitions. [2021-06-05 21:31:07,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:31:07,537 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:31:07,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:07,831 INFO L225 Difference]: With dead ends: 131372 [2021-06-05 21:31:07,831 INFO L226 Difference]: Without dead ends: 131369 [2021-06-05 21:31:07,831 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:31:07,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131369 states. [2021-06-05 21:31:10,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131369 to 131116. [2021-06-05 21:31:10,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 131115 states have (on average 3.0293787896121724) internal successors, (397197), 131115 states have internal predecessors, (397197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 397197 transitions. [2021-06-05 21:31:10,519 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 397197 transitions. Word has length 24 [2021-06-05 21:31:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:10,519 INFO L482 AbstractCegarLoop]: Abstraction has 131116 states and 397197 transitions. [2021-06-05 21:31:10,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:10,519 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 397197 transitions. [2021-06-05 21:31:10,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:31:10,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:10,564 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:10,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9997,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:10,764 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:10,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:10,764 INFO L82 PathProgramCache]: Analyzing trace with hash 542222794, now seen corresponding path program 288 times [2021-06-05 21:31:10,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:10,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581570195] [2021-06-05 21:31:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:31:10,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:10,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581570195] [2021-06-05 21:31:10,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581570195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:10,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752157820] [2021-06-05 21:31:10,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:10,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:31:10,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:10,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:31:10,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:31:10,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752157820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:10,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:10,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:31:10,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264629345] [2021-06-05 21:31:10,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:31:10,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:10,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:31:10,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:31:10,894 INFO L87 Difference]: Start difference. First operand 131116 states and 397197 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:11,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:11,946 INFO L93 Difference]: Finished difference Result 131414 states and 397691 transitions. [2021-06-05 21:31:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:31:11,946 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:31:11,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:12,233 INFO L225 Difference]: With dead ends: 131414 [2021-06-05 21:31:12,233 INFO L226 Difference]: Without dead ends: 131412 [2021-06-05 21:31:12,233 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:31:12,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131412 states. [2021-06-05 21:31:14,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131412 to 131150. [2021-06-05 21:31:14,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131150 states, 131149 states have (on average 3.029096676299476) internal successors, (397263), 131149 states have internal predecessors, (397263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:14,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131150 states to 131150 states and 397263 transitions. [2021-06-05 21:31:14,765 INFO L78 Accepts]: Start accepts. Automaton has 131150 states and 397263 transitions. Word has length 24 [2021-06-05 21:31:14,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:14,765 INFO L482 AbstractCegarLoop]: Abstraction has 131150 states and 397263 transitions. [2021-06-05 21:31:14,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:14,765 INFO L276 IsEmpty]: Start isEmpty. Operand 131150 states and 397263 transitions. [2021-06-05 21:31:14,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:31:14,809 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:14,809 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:15,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9998 [2021-06-05 21:31:15,009 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:15,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:15,010 INFO L82 PathProgramCache]: Analyzing trace with hash -2007289812, now seen corresponding path program 289 times [2021-06-05 21:31:15,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:15,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589116534] [2021-06-05 21:31:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:15,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:31:15,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:15,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589116534] [2021-06-05 21:31:15,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589116534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:15,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231890224] [2021-06-05 21:31:15,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:15,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:31:15,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:31:15,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231890224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:15,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:15,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:31:15,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577098205] [2021-06-05 21:31:15,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:31:15,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:15,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:31:15,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:31:15,136 INFO L87 Difference]: Start difference. First operand 131150 states and 397263 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:15,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:15,683 INFO L93 Difference]: Finished difference Result 131457 states and 397741 transitions. [2021-06-05 21:31:15,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:31:15,683 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:31:15,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:15,941 INFO L225 Difference]: With dead ends: 131457 [2021-06-05 21:31:15,941 INFO L226 Difference]: Without dead ends: 131452 [2021-06-05 21:31:15,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:31:16,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131452 states. [2021-06-05 21:31:18,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131452 to 131114. [2021-06-05 21:31:18,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131114 states, 131113 states have (on average 3.028967379283519) internal successors, (397137), 131113 states have internal predecessors, (397137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131114 states to 131114 states and 397137 transitions. [2021-06-05 21:31:19,223 INFO L78 Accepts]: Start accepts. Automaton has 131114 states and 397137 transitions. Word has length 24 [2021-06-05 21:31:19,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:19,223 INFO L482 AbstractCegarLoop]: Abstraction has 131114 states and 397137 transitions. [2021-06-05 21:31:19,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:19,223 INFO L276 IsEmpty]: Start isEmpty. Operand 131114 states and 397137 transitions. [2021-06-05 21:31:19,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:31:19,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:19,268 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:19,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9999,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:19,469 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:19,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:19,469 INFO L82 PathProgramCache]: Analyzing trace with hash -296676504, now seen corresponding path program 290 times [2021-06-05 21:31:19,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:19,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862734258] [2021-06-05 21:31:19,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:19,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:19,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862734258] [2021-06-05 21:31:19,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862734258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:19,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483850795] [2021-06-05 21:31:19,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:19,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:31:19,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:19,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:31:19,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:31:19,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483850795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:19,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:19,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-06-05 21:31:19,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921334523] [2021-06-05 21:31:19,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:31:19,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:19,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:31:19,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:31:19,601 INFO L87 Difference]: Start difference. First operand 131114 states and 397137 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:20,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:20,173 INFO L93 Difference]: Finished difference Result 131477 states and 397730 transitions. [2021-06-05 21:31:20,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:31:20,174 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:31:20,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:20,447 INFO L225 Difference]: With dead ends: 131477 [2021-06-05 21:31:20,447 INFO L226 Difference]: Without dead ends: 131475 [2021-06-05 21:31:20,448 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:31:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131475 states. [2021-06-05 21:31:22,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131475 to 131109. [2021-06-05 21:31:22,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131109 states, 131108 states have (on average 3.0287701742075237) internal successors, (397096), 131108 states have internal predecessors, (397096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:23,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131109 states to 131109 states and 397096 transitions. [2021-06-05 21:31:23,717 INFO L78 Accepts]: Start accepts. Automaton has 131109 states and 397096 transitions. Word has length 24 [2021-06-05 21:31:23,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:23,717 INFO L482 AbstractCegarLoop]: Abstraction has 131109 states and 397096 transitions. [2021-06-05 21:31:23,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:23,718 INFO L276 IsEmpty]: Start isEmpty. Operand 131109 states and 397096 transitions. [2021-06-05 21:31:23,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:31:23,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:23,773 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:23,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10000 [2021-06-05 21:31:23,974 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:23,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:23,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1192728492, now seen corresponding path program 291 times [2021-06-05 21:31:23,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:23,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697779192] [2021-06-05 21:31:23,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:31:24,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:24,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697779192] [2021-06-05 21:31:24,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697779192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:24,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64220646] [2021-06-05 21:31:24,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:24,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:31:24,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:24,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:31:24,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:31:24,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64220646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:24,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:24,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:31:24,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125375794] [2021-06-05 21:31:24,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:31:24,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:24,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:31:24,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:31:24,112 INFO L87 Difference]: Start difference. First operand 131109 states and 397096 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:24,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:24,734 INFO L93 Difference]: Finished difference Result 131340 states and 397434 transitions. [2021-06-05 21:31:24,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:31:24,735 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:31:24,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:25,019 INFO L225 Difference]: With dead ends: 131340 [2021-06-05 21:31:25,020 INFO L226 Difference]: Without dead ends: 131337 [2021-06-05 21:31:25,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:31:25,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131337 states. [2021-06-05 21:31:27,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131337 to 131102. [2021-06-05 21:31:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131102 states, 131101 states have (on average 3.0285733899817697) internal successors, (397049), 131101 states have internal predecessors, (397049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:27,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131102 states to 131102 states and 397049 transitions. [2021-06-05 21:31:27,929 INFO L78 Accepts]: Start accepts. Automaton has 131102 states and 397049 transitions. Word has length 24 [2021-06-05 21:31:27,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:27,929 INFO L482 AbstractCegarLoop]: Abstraction has 131102 states and 397049 transitions. [2021-06-05 21:31:27,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:27,930 INFO L276 IsEmpty]: Start isEmpty. Operand 131102 states and 397049 transitions. [2021-06-05 21:31:27,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:31:27,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:27,973 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:28,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10001,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:28,173 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:28,173 INFO L82 PathProgramCache]: Analyzing trace with hash 119643112, now seen corresponding path program 292 times [2021-06-05 21:31:28,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:28,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174706783] [2021-06-05 21:31:28,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:28,612 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-05 21:31:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:28,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:28,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174706783] [2021-06-05 21:31:28,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174706783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:28,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817498811] [2021-06-05 21:31:28,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:28,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:31:28,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:28,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:31:28,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:31:28,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817498811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:28,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:28,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-06-05 21:31:28,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774386747] [2021-06-05 21:31:28,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:31:28,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:28,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:31:28,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:31:28,850 INFO L87 Difference]: Start difference. First operand 131102 states and 397049 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:29,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:29,495 INFO L93 Difference]: Finished difference Result 131338 states and 397393 transitions. [2021-06-05 21:31:29,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:31:29,495 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:31:29,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:29,765 INFO L225 Difference]: With dead ends: 131338 [2021-06-05 21:31:29,765 INFO L226 Difference]: Without dead ends: 131333 [2021-06-05 21:31:29,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 637.7ms TimeCoverageRelationStatistics Valid=299, Invalid=631, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:31:29,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131333 states. [2021-06-05 21:31:32,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131333 to 131102. [2021-06-05 21:31:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131102 states, 131101 states have (on average 3.028352186482178) internal successors, (397020), 131101 states have internal predecessors, (397020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131102 states to 131102 states and 397020 transitions. [2021-06-05 21:31:32,524 INFO L78 Accepts]: Start accepts. Automaton has 131102 states and 397020 transitions. Word has length 24 [2021-06-05 21:31:32,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:32,524 INFO L482 AbstractCegarLoop]: Abstraction has 131102 states and 397020 transitions. [2021-06-05 21:31:32,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:32,524 INFO L276 IsEmpty]: Start isEmpty. Operand 131102 states and 397020 transitions. [2021-06-05 21:31:32,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:31:32,567 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:32,567 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:32,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10002 [2021-06-05 21:31:32,767 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:32,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:32,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1213734700, now seen corresponding path program 293 times [2021-06-05 21:31:32,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:32,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936289810] [2021-06-05 21:31:32,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:32,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:32,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936289810] [2021-06-05 21:31:32,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936289810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:32,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681435355] [2021-06-05 21:31:32,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:32,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 21:31:32,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:32,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:31:32,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:32,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681435355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:32,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:32,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:31:32,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58497479] [2021-06-05 21:31:32,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:31:32,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:32,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:31:32,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:31:32,920 INFO L87 Difference]: Start difference. First operand 131102 states and 397020 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:33,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:33,985 INFO L93 Difference]: Finished difference Result 131408 states and 397643 transitions. [2021-06-05 21:31:33,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:31:33,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:31:33,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:34,240 INFO L225 Difference]: With dead ends: 131408 [2021-06-05 21:31:34,240 INFO L226 Difference]: Without dead ends: 131405 [2021-06-05 21:31:34,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:31:34,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131405 states. [2021-06-05 21:31:36,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131405 to 131104. [2021-06-05 21:31:36,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.028328871192879) internal successors, (397023), 131103 states have internal predecessors, (397023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:37,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397023 transitions. [2021-06-05 21:31:37,038 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397023 transitions. Word has length 24 [2021-06-05 21:31:37,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:37,038 INFO L482 AbstractCegarLoop]: Abstraction has 131104 states and 397023 transitions. [2021-06-05 21:31:37,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:37,039 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397023 transitions. [2021-06-05 21:31:37,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:31:37,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:37,083 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:37,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10003,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:37,284 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:37,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:37,284 INFO L82 PathProgramCache]: Analyzing trace with hash 770835560, now seen corresponding path program 294 times [2021-06-05 21:31:37,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:37,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660870590] [2021-06-05 21:31:37,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:37,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:37,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660870590] [2021-06-05 21:31:37,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660870590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:37,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848601088] [2021-06-05 21:31:37,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:37,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 21:31:37,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:37,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:31:37,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:37,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848601088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:37,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:37,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:31:37,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139737588] [2021-06-05 21:31:37,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:31:37,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:37,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:31:37,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:31:37,438 INFO L87 Difference]: Start difference. First operand 131104 states and 397023 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:38,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:38,641 INFO L93 Difference]: Finished difference Result 131400 states and 397630 transitions. [2021-06-05 21:31:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:31:38,641 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:31:38,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:38,907 INFO L225 Difference]: With dead ends: 131400 [2021-06-05 21:31:38,908 INFO L226 Difference]: Without dead ends: 131396 [2021-06-05 21:31:38,908 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:31:38,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131396 states. [2021-06-05 21:31:41,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131396 to 131104. [2021-06-05 21:31:41,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131104 states, 131103 states have (on average 3.0283059884213177) internal successors, (397020), 131103 states have internal predecessors, (397020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:41,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131104 states to 131104 states and 397020 transitions. [2021-06-05 21:31:41,598 INFO L78 Accepts]: Start accepts. Automaton has 131104 states and 397020 transitions. Word has length 24 [2021-06-05 21:31:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:41,598 INFO L482 AbstractCegarLoop]: Abstraction has 131104 states and 397020 transitions. [2021-06-05 21:31:41,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:41,598 INFO L276 IsEmpty]: Start isEmpty. Operand 131104 states and 397020 transitions. [2021-06-05 21:31:41,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:31:41,642 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:41,642 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:41,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10004 [2021-06-05 21:31:41,843 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:41,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:41,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1666696844, now seen corresponding path program 295 times [2021-06-05 21:31:41,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:41,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437664850] [2021-06-05 21:31:41,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:41,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:41,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437664850] [2021-06-05 21:31:41,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437664850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:41,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222309636] [2021-06-05 21:31:41,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:41,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:31:41,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:41,981 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:31:41,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222309636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:41,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:41,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-06-05 21:31:41,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628985288] [2021-06-05 21:31:41,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:31:41,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:41,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:31:41,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:31:41,982 INFO L87 Difference]: Start difference. First operand 131104 states and 397020 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:43,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:43,194 INFO L93 Difference]: Finished difference Result 131360 states and 397542 transitions. [2021-06-05 21:31:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:31:43,194 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:31:43,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:43,743 INFO L225 Difference]: With dead ends: 131360 [2021-06-05 21:31:43,743 INFO L226 Difference]: Without dead ends: 131357 [2021-06-05 21:31:43,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:31:43,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131357 states. [2021-06-05 21:31:46,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131357 to 131089. [2021-06-05 21:31:46,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131089 states, 131088 states have (on average 3.0283626266324912) internal successors, (396982), 131088 states have internal predecessors, (396982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:46,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131089 states to 131089 states and 396982 transitions. [2021-06-05 21:31:46,568 INFO L78 Accepts]: Start accepts. Automaton has 131089 states and 396982 transitions. Word has length 24 [2021-06-05 21:31:46,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:46,568 INFO L482 AbstractCegarLoop]: Abstraction has 131089 states and 396982 transitions. [2021-06-05 21:31:46,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:46,568 INFO L276 IsEmpty]: Start isEmpty. Operand 131089 states and 396982 transitions. [2021-06-05 21:31:46,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:31:46,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:46,614 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:46,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10005 [2021-06-05 21:31:46,815 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:46,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:46,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1360813274, now seen corresponding path program 296 times [2021-06-05 21:31:46,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:46,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288436890] [2021-06-05 21:31:46,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:46,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:46,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288436890] [2021-06-05 21:31:46,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288436890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:46,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959220338] [2021-06-05 21:31:46,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:46,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:31:46,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:46,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:31:46,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:31:46,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959220338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:46,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:46,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-06-05 21:31:46,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190656832] [2021-06-05 21:31:46,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:31:46,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:46,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:31:46,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:31:46,959 INFO L87 Difference]: Start difference. First operand 131089 states and 396982 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:47,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:47,616 INFO L93 Difference]: Finished difference Result 131311 states and 397318 transitions. [2021-06-05 21:31:47,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:31:47,617 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:31:47,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:47,892 INFO L225 Difference]: With dead ends: 131311 [2021-06-05 21:31:47,892 INFO L226 Difference]: Without dead ends: 131308 [2021-06-05 21:31:47,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 151.1ms TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:31:47,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131308 states. [2021-06-05 21:31:50,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131308 to 131087. [2021-06-05 21:31:50,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131087 states, 131086 states have (on average 3.028195230611965) internal successors, (396954), 131086 states have internal predecessors, (396954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:51,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131087 states to 131087 states and 396954 transitions. [2021-06-05 21:31:51,291 INFO L78 Accepts]: Start accepts. Automaton has 131087 states and 396954 transitions. Word has length 24 [2021-06-05 21:31:51,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:51,291 INFO L482 AbstractCegarLoop]: Abstraction has 131087 states and 396954 transitions. [2021-06-05 21:31:51,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:51,291 INFO L276 IsEmpty]: Start isEmpty. Operand 131087 states and 396954 transitions. [2021-06-05 21:31:51,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:31:51,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:51,334 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:51,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10006 [2021-06-05 21:31:51,534 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:51,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:51,535 INFO L82 PathProgramCache]: Analyzing trace with hash 917914134, now seen corresponding path program 297 times [2021-06-05 21:31:51,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:51,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136066349] [2021-06-05 21:31:51,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:51,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:51,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136066349] [2021-06-05 21:31:51,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136066349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:51,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591203774] [2021-06-05 21:31:51,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:51,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:31:51,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:51,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:31:51,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:51,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591203774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:51,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:51,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:31:51,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305767286] [2021-06-05 21:31:51,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:31:51,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:51,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:31:51,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:31:51,689 INFO L87 Difference]: Start difference. First operand 131087 states and 396954 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:52,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:52,353 INFO L93 Difference]: Finished difference Result 131552 states and 397896 transitions. [2021-06-05 21:31:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:31:52,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:31:52,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:52,640 INFO L225 Difference]: With dead ends: 131552 [2021-06-05 21:31:52,641 INFO L226 Difference]: Without dead ends: 131544 [2021-06-05 21:31:52,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:31:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131544 states. [2021-06-05 21:31:55,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131544 to 131094. [2021-06-05 21:31:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131094 states, 131093 states have (on average 3.0281555842035806) internal successors, (396970), 131093 states have internal predecessors, (396970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131094 states to 131094 states and 396970 transitions. [2021-06-05 21:31:55,516 INFO L78 Accepts]: Start accepts. Automaton has 131094 states and 396970 transitions. Word has length 24 [2021-06-05 21:31:55,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:55,516 INFO L482 AbstractCegarLoop]: Abstraction has 131094 states and 396970 transitions. [2021-06-05 21:31:55,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 131094 states and 396970 transitions. [2021-06-05 21:31:56,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:31:56,001 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:56,001 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:56,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10007,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:56,217 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:56,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:56,217 INFO L82 PathProgramCache]: Analyzing trace with hash 52834514, now seen corresponding path program 298 times [2021-06-05 21:31:56,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:56,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395407229] [2021-06-05 21:31:56,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:31:56,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:56,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395407229] [2021-06-05 21:31:56,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395407229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:56,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623929571] [2021-06-05 21:31:56,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:56,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:31:56,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:56,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:31:56,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:31:56,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623929571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:56,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:56,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:31:56,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334512652] [2021-06-05 21:31:56,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:31:56,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:56,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:31:56,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:31:56,343 INFO L87 Difference]: Start difference. First operand 131094 states and 396970 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:56,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:56,865 INFO L93 Difference]: Finished difference Result 131378 states and 397470 transitions. [2021-06-05 21:31:56,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:31:56,866 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:31:56,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:57,141 INFO L225 Difference]: With dead ends: 131378 [2021-06-05 21:31:57,141 INFO L226 Difference]: Without dead ends: 131378 [2021-06-05 21:31:57,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:31:57,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131378 states. [2021-06-05 21:31:59,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131378 to 131115. [2021-06-05 21:31:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131115 states, 131114 states have (on average 3.0280900590325976) internal successors, (397025), 131114 states have internal predecessors, (397025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:00,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131115 states to 131115 states and 397025 transitions. [2021-06-05 21:32:00,025 INFO L78 Accepts]: Start accepts. Automaton has 131115 states and 397025 transitions. Word has length 24 [2021-06-05 21:32:00,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:00,025 INFO L482 AbstractCegarLoop]: Abstraction has 131115 states and 397025 transitions. [2021-06-05 21:32:00,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:00,025 INFO L276 IsEmpty]: Start isEmpty. Operand 131115 states and 397025 transitions. [2021-06-05 21:32:00,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:32:00,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:00,070 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:00,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10008 [2021-06-05 21:32:00,270 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:00,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:00,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1798289204, now seen corresponding path program 299 times [2021-06-05 21:32:00,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:00,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000401742] [2021-06-05 21:32:00,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:32:00,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:00,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000401742] [2021-06-05 21:32:00,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000401742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:00,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819446355] [2021-06-05 21:32:00,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:00,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:32:00,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:00,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:32:00,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:32:00,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819446355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:00,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:00,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:32:00,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789059536] [2021-06-05 21:32:00,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:32:00,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:00,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:32:00,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:32:00,434 INFO L87 Difference]: Start difference. First operand 131115 states and 397025 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:01,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:01,462 INFO L93 Difference]: Finished difference Result 131464 states and 397561 transitions. [2021-06-05 21:32:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:32:01,462 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:32:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:01,726 INFO L225 Difference]: With dead ends: 131464 [2021-06-05 21:32:01,726 INFO L226 Difference]: Without dead ends: 131461 [2021-06-05 21:32:01,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:32:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131461 states. [2021-06-05 21:32:04,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131461 to 131127. [2021-06-05 21:32:04,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131127 states, 131126 states have (on average 3.0277290544972013) internal successors, (397014), 131126 states have internal predecessors, (397014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131127 states to 131127 states and 397014 transitions. [2021-06-05 21:32:04,502 INFO L78 Accepts]: Start accepts. Automaton has 131127 states and 397014 transitions. Word has length 24 [2021-06-05 21:32:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:04,502 INFO L482 AbstractCegarLoop]: Abstraction has 131127 states and 397014 transitions. [2021-06-05 21:32:04,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:04,502 INFO L276 IsEmpty]: Start isEmpty. Operand 131127 states and 397014 transitions. [2021-06-05 21:32:04,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:32:04,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:04,551 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:04,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10009,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:04,752 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:04,752 INFO L82 PathProgramCache]: Analyzing trace with hash 703340212, now seen corresponding path program 300 times [2021-06-05 21:32:04,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:04,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624007868] [2021-06-05 21:32:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:04,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:04,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624007868] [2021-06-05 21:32:04,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624007868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:04,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985483294] [2021-06-05 21:32:04,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:04,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:32:04,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:04,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:32:04,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:04,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985483294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:04,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:04,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:32:04,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670783773] [2021-06-05 21:32:04,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:32:04,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:04,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:32:04,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:32:04,885 INFO L87 Difference]: Start difference. First operand 131127 states and 397014 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:06,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:06,102 INFO L93 Difference]: Finished difference Result 131365 states and 397357 transitions. [2021-06-05 21:32:06,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:32:06,103 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:32:06,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:06,392 INFO L225 Difference]: With dead ends: 131365 [2021-06-05 21:32:06,393 INFO L226 Difference]: Without dead ends: 131358 [2021-06-05 21:32:06,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=248, Invalid=508, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:32:06,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131358 states. [2021-06-05 21:32:08,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131358 to 131081. [2021-06-05 21:32:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131081 states, 131080 states have (on average 3.0275785779676534) internal successors, (396855), 131080 states have internal predecessors, (396855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:09,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131081 states to 131081 states and 396855 transitions. [2021-06-05 21:32:09,066 INFO L78 Accepts]: Start accepts. Automaton has 131081 states and 396855 transitions. Word has length 24 [2021-06-05 21:32:09,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:09,066 INFO L482 AbstractCegarLoop]: Abstraction has 131081 states and 396855 transitions. [2021-06-05 21:32:09,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:09,066 INFO L276 IsEmpty]: Start isEmpty. Operand 131081 states and 396855 transitions. [2021-06-05 21:32:09,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:32:09,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:09,114 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:09,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10010,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:09,314 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:09,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:09,314 INFO L82 PathProgramCache]: Analyzing trace with hash -369745168, now seen corresponding path program 301 times [2021-06-05 21:32:09,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:09,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139986261] [2021-06-05 21:32:09,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 27 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:32:09,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:09,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139986261] [2021-06-05 21:32:09,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139986261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:09,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008491879] [2021-06-05 21:32:09,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:09,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:32:09,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:32:09,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008491879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:09,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:09,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 21:32:09,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761638650] [2021-06-05 21:32:09,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:32:09,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:09,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:32:09,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:32:09,453 INFO L87 Difference]: Start difference. First operand 131081 states and 396855 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:10,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:10,100 INFO L93 Difference]: Finished difference Result 131320 states and 397204 transitions. [2021-06-05 21:32:10,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:32:10,101 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:32:10,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:10,962 INFO L225 Difference]: With dead ends: 131320 [2021-06-05 21:32:10,962 INFO L226 Difference]: Without dead ends: 131315 [2021-06-05 21:32:10,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:32:11,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131315 states. [2021-06-05 21:32:13,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131315 to 131074. [2021-06-05 21:32:13,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131074 states, 131073 states have (on average 3.0273053947037147) internal successors, (396798), 131073 states have internal predecessors, (396798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:13,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131074 states to 131074 states and 396798 transitions. [2021-06-05 21:32:13,532 INFO L78 Accepts]: Start accepts. Automaton has 131074 states and 396798 transitions. Word has length 24 [2021-06-05 21:32:13,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:13,532 INFO L482 AbstractCegarLoop]: Abstraction has 131074 states and 396798 transitions. [2021-06-05 21:32:13,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:13,532 INFO L276 IsEmpty]: Start isEmpty. Operand 131074 states and 396798 transitions. [2021-06-05 21:32:13,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:32:13,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:13,577 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:13,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10011 [2021-06-05 21:32:13,777 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:13,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:13,778 INFO L82 PathProgramCache]: Analyzing trace with hash 724346420, now seen corresponding path program 302 times [2021-06-05 21:32:13,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:13,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132852319] [2021-06-05 21:32:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:13,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:13,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132852319] [2021-06-05 21:32:13,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132852319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:13,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994767028] [2021-06-05 21:32:13,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:13,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:32:13,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:13,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:32:13,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:32:13,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994767028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:13,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:13,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-06-05 21:32:13,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507544146] [2021-06-05 21:32:13,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:32:13,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:13,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:32:13,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:32:13,937 INFO L87 Difference]: Start difference. First operand 131074 states and 396798 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:14,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:14,606 INFO L93 Difference]: Finished difference Result 131318 states and 397153 transitions. [2021-06-05 21:32:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:32:14,607 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:32:14,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:14,884 INFO L225 Difference]: With dead ends: 131318 [2021-06-05 21:32:14,884 INFO L226 Difference]: Without dead ends: 131312 [2021-06-05 21:32:14,884 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=317, Invalid=675, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:32:15,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131312 states. [2021-06-05 21:32:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131312 to 131075. [2021-06-05 21:32:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131075 states, 131074 states have (on average 3.026984756702321) internal successors, (396759), 131074 states have internal predecessors, (396759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:18,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131075 states to 131075 states and 396759 transitions. [2021-06-05 21:32:18,188 INFO L78 Accepts]: Start accepts. Automaton has 131075 states and 396759 transitions. Word has length 24 [2021-06-05 21:32:18,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:18,188 INFO L482 AbstractCegarLoop]: Abstraction has 131075 states and 396759 transitions. [2021-06-05 21:32:18,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:18,188 INFO L276 IsEmpty]: Start isEmpty. Operand 131075 states and 396759 transitions. [2021-06-05 21:32:18,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:32:18,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:18,233 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:18,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10012 [2021-06-05 21:32:18,434 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:18,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:18,434 INFO L82 PathProgramCache]: Analyzing trace with hash 281447280, now seen corresponding path program 303 times [2021-06-05 21:32:18,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:18,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462381201] [2021-06-05 21:32:18,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:18,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:18,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462381201] [2021-06-05 21:32:18,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462381201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:18,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279920279] [2021-06-05 21:32:18,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:18,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:32:18,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:18,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:32:18,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:18,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279920279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:18,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:18,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 21:32:18,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998795313] [2021-06-05 21:32:18,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:32:18,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:18,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:32:18,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:32:18,594 INFO L87 Difference]: Start difference. First operand 131075 states and 396759 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:19,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:19,242 INFO L93 Difference]: Finished difference Result 131674 states and 397979 transitions. [2021-06-05 21:32:19,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:32:19,243 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:32:19,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:19,532 INFO L225 Difference]: With dead ends: 131674 [2021-06-05 21:32:19,532 INFO L226 Difference]: Without dead ends: 131666 [2021-06-05 21:32:19,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 184.1ms TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:32:19,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131666 states. [2021-06-05 21:32:21,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131666 to 131083. [2021-06-05 21:32:22,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131083 states, 131082 states have (on average 3.026937336934133) internal successors, (396777), 131082 states have internal predecessors, (396777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:22,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131083 states to 131083 states and 396777 transitions. [2021-06-05 21:32:22,889 INFO L78 Accepts]: Start accepts. Automaton has 131083 states and 396777 transitions. Word has length 24 [2021-06-05 21:32:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:22,889 INFO L482 AbstractCegarLoop]: Abstraction has 131083 states and 396777 transitions. [2021-06-05 21:32:22,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:22,889 INFO L276 IsEmpty]: Start isEmpty. Operand 131083 states and 396777 transitions. [2021-06-05 21:32:22,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:32:22,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:22,930 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:23,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10013 [2021-06-05 21:32:23,131 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:23,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:23,131 INFO L82 PathProgramCache]: Analyzing trace with hash -563524172, now seen corresponding path program 304 times [2021-06-05 21:32:23,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:23,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767256158] [2021-06-05 21:32:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:23,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:23,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767256158] [2021-06-05 21:32:23,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767256158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:23,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479045033] [2021-06-05 21:32:23,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:23,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:32:23,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:23,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:32:23,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:32:23,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479045033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:23,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:23,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-06-05 21:32:23,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204731407] [2021-06-05 21:32:23,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:32:23,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:23,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:32:23,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:32:23,296 INFO L87 Difference]: Start difference. First operand 131083 states and 396777 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:23,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:23,953 INFO L93 Difference]: Finished difference Result 131661 states and 397955 transitions. [2021-06-05 21:32:23,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:32:23,954 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:32:23,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:24,222 INFO L225 Difference]: With dead ends: 131661 [2021-06-05 21:32:24,222 INFO L226 Difference]: Without dead ends: 131646 [2021-06-05 21:32:24,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 196.9ms TimeCoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:32:24,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131646 states. [2021-06-05 21:32:26,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131646 to 131092. [2021-06-05 21:32:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131092 states, 131091 states have (on average 3.0268515763858694) internal successors, (396793), 131091 states have internal predecessors, (396793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131092 states to 131092 states and 396793 transitions. [2021-06-05 21:32:27,602 INFO L78 Accepts]: Start accepts. Automaton has 131092 states and 396793 transitions. Word has length 24 [2021-06-05 21:32:27,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:27,602 INFO L482 AbstractCegarLoop]: Abstraction has 131092 states and 396793 transitions. [2021-06-05 21:32:27,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:27,602 INFO L276 IsEmpty]: Start isEmpty. Operand 131092 states and 396793 transitions. [2021-06-05 21:32:27,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:32:27,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:27,657 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:27,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10014 [2021-06-05 21:32:27,880 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:27,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:27,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1182382632, now seen corresponding path program 305 times [2021-06-05 21:32:27,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:27,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593349042] [2021-06-05 21:32:27,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:27,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:27,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593349042] [2021-06-05 21:32:27,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593349042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:27,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818938350] [2021-06-05 21:32:27,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:27,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:32:27,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:27,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:32:27,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:28,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818938350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:28,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:28,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:32:28,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589063402] [2021-06-05 21:32:28,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:32:28,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:28,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:32:28,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:32:28,025 INFO L87 Difference]: Start difference. First operand 131092 states and 396793 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:28,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:28,645 INFO L93 Difference]: Finished difference Result 131394 states and 397427 transitions. [2021-06-05 21:32:28,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:32:28,645 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:32:28,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:28,917 INFO L225 Difference]: With dead ends: 131394 [2021-06-05 21:32:28,917 INFO L226 Difference]: Without dead ends: 131390 [2021-06-05 21:32:28,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=252, Invalid=560, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:32:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131390 states. [2021-06-05 21:32:31,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131390 to 131082. [2021-06-05 21:32:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131082 states, 131081 states have (on average 3.0267544495388345) internal successors, (396750), 131081 states have internal predecessors, (396750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:31,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131082 states to 131082 states and 396750 transitions. [2021-06-05 21:32:31,707 INFO L78 Accepts]: Start accepts. Automaton has 131082 states and 396750 transitions. Word has length 24 [2021-06-05 21:32:31,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:31,707 INFO L482 AbstractCegarLoop]: Abstraction has 131082 states and 396750 transitions. [2021-06-05 21:32:31,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:31,707 INFO L276 IsEmpty]: Start isEmpty. Operand 131082 states and 396750 transitions. [2021-06-05 21:32:31,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:32:31,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:31,751 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:31,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10015 [2021-06-05 21:32:31,951 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:31,952 INFO L82 PathProgramCache]: Analyzing trace with hash 545915778, now seen corresponding path program 306 times [2021-06-05 21:32:31,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:31,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094716139] [2021-06-05 21:32:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:32,034 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:32,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:32,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094716139] [2021-06-05 21:32:32,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094716139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:32,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112761252] [2021-06-05 21:32:32,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:32,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:32:32,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:32,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:32:32,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:32,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112761252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:32,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:32,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 21:32:32,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473978641] [2021-06-05 21:32:32,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:32:32,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:32,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:32:32,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:32:32,109 INFO L87 Difference]: Start difference. First operand 131082 states and 396750 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:33,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:33,199 INFO L93 Difference]: Finished difference Result 131351 states and 397199 transitions. [2021-06-05 21:32:33,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:32:33,199 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:32:33,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:33,457 INFO L225 Difference]: With dead ends: 131351 [2021-06-05 21:32:33,457 INFO L226 Difference]: Without dead ends: 131347 [2021-06-05 21:32:33,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 178.8ms TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:32:33,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131347 states. [2021-06-05 21:32:35,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131347 to 131079. [2021-06-05 21:32:35,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131079 states, 131078 states have (on average 3.0264804162407115) internal successors, (396705), 131078 states have internal predecessors, (396705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:36,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131079 states to 131079 states and 396705 transitions. [2021-06-05 21:32:36,274 INFO L78 Accepts]: Start accepts. Automaton has 131079 states and 396705 transitions. Word has length 24 [2021-06-05 21:32:36,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:36,274 INFO L482 AbstractCegarLoop]: Abstraction has 131079 states and 396705 transitions. [2021-06-05 21:32:36,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:36,274 INFO L276 IsEmpty]: Start isEmpty. Operand 131079 states and 396705 transitions. [2021-06-05 21:32:36,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:32:36,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:36,321 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:36,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10016,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:36,521 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:36,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:36,521 INFO L82 PathProgramCache]: Analyzing trace with hash -299055674, now seen corresponding path program 307 times [2021-06-05 21:32:36,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:36,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127877957] [2021-06-05 21:32:36,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:36,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:36,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127877957] [2021-06-05 21:32:36,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127877957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:36,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081914671] [2021-06-05 21:32:36,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:36,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:32:36,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:32:36,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081914671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:36,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:36,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-06-05 21:32:36,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9295843] [2021-06-05 21:32:36,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:32:36,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:36,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:32:36,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:32:36,674 INFO L87 Difference]: Start difference. First operand 131079 states and 396705 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:37,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:37,911 INFO L93 Difference]: Finished difference Result 131763 states and 398113 transitions. [2021-06-05 21:32:37,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:32:37,911 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:32:37,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:38,208 INFO L225 Difference]: With dead ends: 131763 [2021-06-05 21:32:38,208 INFO L226 Difference]: Without dead ends: 131748 [2021-06-05 21:32:38,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 187.9ms TimeCoverageRelationStatistics Valid=327, Invalid=729, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:32:38,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131748 states. [2021-06-05 21:32:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131748 to 131119. [2021-06-05 21:32:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131119 states, 131118 states have (on average 3.0261825226132184) internal successors, (396787), 131118 states have internal predecessors, (396787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131119 states to 131119 states and 396787 transitions. [2021-06-05 21:32:40,953 INFO L78 Accepts]: Start accepts. Automaton has 131119 states and 396787 transitions. Word has length 24 [2021-06-05 21:32:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:40,953 INFO L482 AbstractCegarLoop]: Abstraction has 131119 states and 396787 transitions. [2021-06-05 21:32:40,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:40,954 INFO L276 IsEmpty]: Start isEmpty. Operand 131119 states and 396787 transitions. [2021-06-05 21:32:40,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:32:40,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:40,996 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:41,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10017 [2021-06-05 21:32:41,196 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:41,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:41,196 INFO L82 PathProgramCache]: Analyzing trace with hash 2061667018, now seen corresponding path program 308 times [2021-06-05 21:32:41,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:41,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487895798] [2021-06-05 21:32:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:32:41,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:41,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487895798] [2021-06-05 21:32:41,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487895798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:41,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617981574] [2021-06-05 21:32:41,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:41,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:32:41,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:41,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:32:41,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:32:41,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617981574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:41,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:41,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:32:41,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155521566] [2021-06-05 21:32:41,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:32:41,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:41,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:32:41,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:32:41,368 INFO L87 Difference]: Start difference. First operand 131119 states and 396787 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:42,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:42,526 INFO L93 Difference]: Finished difference Result 131485 states and 397395 transitions. [2021-06-05 21:32:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:32:42,527 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:32:42,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:42,816 INFO L225 Difference]: With dead ends: 131485 [2021-06-05 21:32:42,816 INFO L226 Difference]: Without dead ends: 131485 [2021-06-05 21:32:42,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:32:42,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131485 states. [2021-06-05 21:32:45,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131485 to 131093. [2021-06-05 21:32:45,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131093 states, 131092 states have (on average 3.025852073353065) internal successors, (396665), 131092 states have internal predecessors, (396665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131093 states to 131093 states and 396665 transitions. [2021-06-05 21:32:45,824 INFO L78 Accepts]: Start accepts. Automaton has 131093 states and 396665 transitions. Word has length 24 [2021-06-05 21:32:45,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:45,824 INFO L482 AbstractCegarLoop]: Abstraction has 131093 states and 396665 transitions. [2021-06-05 21:32:45,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:45,824 INFO L276 IsEmpty]: Start isEmpty. Operand 131093 states and 396665 transitions. [2021-06-05 21:32:45,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:32:45,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:45,885 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:46,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10018 [2021-06-05 21:32:46,097 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:46,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:46,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1582794580, now seen corresponding path program 309 times [2021-06-05 21:32:46,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:46,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436236764] [2021-06-05 21:32:46,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:46,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:46,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436236764] [2021-06-05 21:32:46,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436236764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:46,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488676536] [2021-06-05 21:32:46,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:46,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:32:46,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:46,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:32:46,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:46,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488676536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:46,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:46,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:32:46,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665252562] [2021-06-05 21:32:46,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:32:46,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:46,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:32:46,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:32:46,260 INFO L87 Difference]: Start difference. First operand 131093 states and 396665 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:46,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:46,956 INFO L93 Difference]: Finished difference Result 131333 states and 397012 transitions. [2021-06-05 21:32:46,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:32:46,957 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:32:46,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:47,219 INFO L225 Difference]: With dead ends: 131333 [2021-06-05 21:32:47,219 INFO L226 Difference]: Without dead ends: 131328 [2021-06-05 21:32:47,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:32:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131328 states. [2021-06-05 21:32:49,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131328 to 131072. [2021-06-05 21:32:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.0252458591145257) internal successors, (396522), 131071 states have internal predecessors, (396522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:50,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396522 transitions. [2021-06-05 21:32:50,652 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396522 transitions. Word has length 24 [2021-06-05 21:32:50,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:50,652 INFO L482 AbstractCegarLoop]: Abstraction has 131072 states and 396522 transitions. [2021-06-05 21:32:50,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:50,652 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396522 transitions. [2021-06-05 21:32:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:32:50,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:50,690 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:50,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10019,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:50,890 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:50,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:50,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1639087336, now seen corresponding path program 310 times [2021-06-05 21:32:50,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:50,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057085763] [2021-06-05 21:32:50,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:50,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:50,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057085763] [2021-06-05 21:32:50,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057085763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:50,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603519917] [2021-06-05 21:32:50,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:50,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:32:50,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:50,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:32:50,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:32:51,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603519917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:51,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:51,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 21:32:51,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332008435] [2021-06-05 21:32:51,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:32:51,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:51,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:32:51,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:32:51,028 INFO L87 Difference]: Start difference. First operand 131072 states and 396522 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:51,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:51,621 INFO L93 Difference]: Finished difference Result 131314 states and 396874 transitions. [2021-06-05 21:32:51,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:32:51,622 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:32:51,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:51,920 INFO L225 Difference]: With dead ends: 131314 [2021-06-05 21:32:51,921 INFO L226 Difference]: Without dead ends: 131309 [2021-06-05 21:32:51,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:32:52,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131309 states. [2021-06-05 21:32:54,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131309 to 131072. [2021-06-05 21:32:54,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.024261659711149) internal successors, (396393), 131071 states have internal predecessors, (396393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:54,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396393 transitions. [2021-06-05 21:32:54,849 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396393 transitions. Word has length 24 [2021-06-05 21:32:54,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:54,849 INFO L482 AbstractCegarLoop]: Abstraction has 131072 states and 396393 transitions. [2021-06-05 21:32:54,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396393 transitions. [2021-06-05 21:32:55,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:32:55,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:55,321 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:55,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10020 [2021-06-05 21:32:55,537 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:55,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:55,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1561788372, now seen corresponding path program 311 times [2021-06-05 21:32:55,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:55,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045530236] [2021-06-05 21:32:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:32:55,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:55,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045530236] [2021-06-05 21:32:55,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045530236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:55,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413659819] [2021-06-05 21:32:55,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:55,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:32:55,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:55,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:32:55,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:32:55,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413659819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:55,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:55,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:32:55,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112839933] [2021-06-05 21:32:55,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:32:55,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:55,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:32:55,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:32:55,694 INFO L87 Difference]: Start difference. First operand 131072 states and 396393 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:56,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:32:56,256 INFO L93 Difference]: Finished difference Result 132743 states and 399958 transitions. [2021-06-05 21:32:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:32:56,256 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:32:56,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:32:56,532 INFO L225 Difference]: With dead ends: 132743 [2021-06-05 21:32:56,532 INFO L226 Difference]: Without dead ends: 132740 [2021-06-05 21:32:56,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:32:56,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132740 states. [2021-06-05 21:32:58,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132740 to 131072. [2021-06-05 21:32:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131072 states, 131071 states have (on average 3.0241853651837554) internal successors, (396383), 131071 states have internal predecessors, (396383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:59,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131072 states to 131072 states and 396383 transitions. [2021-06-05 21:32:59,346 INFO L78 Accepts]: Start accepts. Automaton has 131072 states and 396383 transitions. Word has length 24 [2021-06-05 21:32:59,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:32:59,347 INFO L482 AbstractCegarLoop]: Abstraction has 131072 states and 396383 transitions. [2021-06-05 21:32:59,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:32:59,347 INFO L276 IsEmpty]: Start isEmpty. Operand 131072 states and 396383 transitions. [2021-06-05 21:32:59,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:32:59,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:32:59,390 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:32:59,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10021,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:59,591 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:32:59,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:32:59,591 INFO L82 PathProgramCache]: Analyzing trace with hash -2004687512, now seen corresponding path program 312 times [2021-06-05 21:32:59,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:32:59,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828824499] [2021-06-05 21:32:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:32:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:32:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:59,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:32:59,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828824499] [2021-06-05 21:32:59,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828824499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:59,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40836152] [2021-06-05 21:32:59,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:32:59,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:32:59,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:32:59,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:32:59,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:32:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:32:59,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40836152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:32:59,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:32:59,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 21:32:59,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496716766] [2021-06-05 21:32:59,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:32:59,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:32:59,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:32:59,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:32:59,751 INFO L87 Difference]: Start difference. First operand 131072 states and 396383 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:00,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:00,813 INFO L93 Difference]: Finished difference Result 132748 states and 399952 transitions. [2021-06-05 21:33:00,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:33:00,814 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:33:00,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:01,082 INFO L225 Difference]: With dead ends: 132748 [2021-06-05 21:33:01,082 INFO L226 Difference]: Without dead ends: 132740 [2021-06-05 21:33:01,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:33:01,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132740 states. [2021-06-05 21:33:03,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132740 to 131124. [2021-06-05 21:33:03,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.0238097053911215) internal successors, (396491), 131123 states have internal predecessors, (396491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:03,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396491 transitions. [2021-06-05 21:33:03,809 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396491 transitions. Word has length 24 [2021-06-05 21:33:03,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:03,809 INFO L482 AbstractCegarLoop]: Abstraction has 131124 states and 396491 transitions. [2021-06-05 21:33:03,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:03,809 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396491 transitions. [2021-06-05 21:33:03,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:33:03,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:03,855 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:04,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10022 [2021-06-05 21:33:04,056 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:04,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:04,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1445308332, now seen corresponding path program 313 times [2021-06-05 21:33:04,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:04,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668985170] [2021-06-05 21:33:04,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:04,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:04,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668985170] [2021-06-05 21:33:04,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668985170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:04,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160511452] [2021-06-05 21:33:04,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:04,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:33:04,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:33:04,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160511452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:04,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:04,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-06-05 21:33:04,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010254724] [2021-06-05 21:33:04,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:33:04,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:04,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:33:04,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:33:04,210 INFO L87 Difference]: Start difference. First operand 131124 states and 396491 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:05,399 INFO L93 Difference]: Finished difference Result 131783 states and 397838 transitions. [2021-06-05 21:33:05,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:33:05,399 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:33:05,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:05,678 INFO L225 Difference]: With dead ends: 131783 [2021-06-05 21:33:05,678 INFO L226 Difference]: Without dead ends: 131778 [2021-06-05 21:33:05,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:33:05,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131778 states. [2021-06-05 21:33:07,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131778 to 131124. [2021-06-05 21:33:07,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.023794452536931) internal successors, (396489), 131123 states have internal predecessors, (396489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:08,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396489 transitions. [2021-06-05 21:33:08,331 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396489 transitions. Word has length 24 [2021-06-05 21:33:08,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:08,331 INFO L482 AbstractCegarLoop]: Abstraction has 131124 states and 396489 transitions. [2021-06-05 21:33:08,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:08,331 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396489 transitions. [2021-06-05 21:33:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:33:08,376 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:08,376 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:08,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10023 [2021-06-05 21:33:08,577 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:08,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:08,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1020997096, now seen corresponding path program 314 times [2021-06-05 21:33:08,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:08,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073647085] [2021-06-05 21:33:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:08,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:08,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073647085] [2021-06-05 21:33:08,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073647085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:08,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891023758] [2021-06-05 21:33:08,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:08,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:33:08,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:08,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:33:08,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:33:08,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891023758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:08,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:08,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-06-05 21:33:08,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513596117] [2021-06-05 21:33:08,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:33:08,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:08,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:33:08,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:33:08,737 INFO L87 Difference]: Start difference. First operand 131124 states and 396489 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:09,892 INFO L93 Difference]: Finished difference Result 131712 states and 397702 transitions. [2021-06-05 21:33:09,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:33:09,893 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:33:09,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:10,190 INFO L225 Difference]: With dead ends: 131712 [2021-06-05 21:33:10,190 INFO L226 Difference]: Without dead ends: 131706 [2021-06-05 21:33:10,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:33:10,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131706 states. [2021-06-05 21:33:12,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131706 to 131124. [2021-06-05 21:33:12,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131124 states, 131123 states have (on average 3.023779199682741) internal successors, (396487), 131123 states have internal predecessors, (396487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:12,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131124 states to 131124 states and 396487 transitions. [2021-06-05 21:33:12,739 INFO L78 Accepts]: Start accepts. Automaton has 131124 states and 396487 transitions. Word has length 24 [2021-06-05 21:33:12,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:12,740 INFO L482 AbstractCegarLoop]: Abstraction has 131124 states and 396487 transitions. [2021-06-05 21:33:12,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:12,740 INFO L276 IsEmpty]: Start isEmpty. Operand 131124 states and 396487 transitions. [2021-06-05 21:33:12,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:33:12,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:12,785 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:12,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10024 [2021-06-05 21:33:12,985 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:12,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:12,985 INFO L82 PathProgramCache]: Analyzing trace with hash -690466828, now seen corresponding path program 315 times [2021-06-05 21:33:12,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:12,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491378304] [2021-06-05 21:33:12,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:13,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:13,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491378304] [2021-06-05 21:33:13,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491378304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:13,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261808917] [2021-06-05 21:33:13,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:13,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:33:13,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:13,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:33:13,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:13,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261808917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:13,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:13,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 21:33:13,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276487893] [2021-06-05 21:33:13,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:33:13,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:13,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:33:13,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:33:13,162 INFO L87 Difference]: Start difference. First operand 131124 states and 396487 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:13,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:13,777 INFO L93 Difference]: Finished difference Result 131475 states and 397232 transitions. [2021-06-05 21:33:13,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:33:13,778 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:33:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:14,577 INFO L225 Difference]: With dead ends: 131475 [2021-06-05 21:33:14,578 INFO L226 Difference]: Without dead ends: 131470 [2021-06-05 21:33:14,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:33:14,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131470 states. [2021-06-05 21:33:16,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131470 to 131115. [2021-06-05 21:33:16,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131115 states, 131114 states have (on average 3.0236435468371035) internal successors, (396442), 131114 states have internal predecessors, (396442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:17,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131115 states to 131115 states and 396442 transitions. [2021-06-05 21:33:17,288 INFO L78 Accepts]: Start accepts. Automaton has 131115 states and 396442 transitions. Word has length 24 [2021-06-05 21:33:17,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:17,289 INFO L482 AbstractCegarLoop]: Abstraction has 131115 states and 396442 transitions. [2021-06-05 21:33:17,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:17,289 INFO L276 IsEmpty]: Start isEmpty. Operand 131115 states and 396442 transitions. [2021-06-05 21:33:17,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:33:17,336 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:17,336 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:17,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10025 [2021-06-05 21:33:17,537 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:17,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:17,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1053897178, now seen corresponding path program 316 times [2021-06-05 21:33:17,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:17,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033532199] [2021-06-05 21:33:17,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:17,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:17,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033532199] [2021-06-05 21:33:17,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033532199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:17,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618042781] [2021-06-05 21:33:17,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:17,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:33:17,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:17,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:33:17,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:33:17,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618042781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:17,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:17,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-06-05 21:33:17,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332033097] [2021-06-05 21:33:17,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:33:17,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:17,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:33:17,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:33:17,696 INFO L87 Difference]: Start difference. First operand 131115 states and 396442 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:18,321 INFO L93 Difference]: Finished difference Result 132301 states and 398883 transitions. [2021-06-05 21:33:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:33:18,322 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:33:18,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:18,604 INFO L225 Difference]: With dead ends: 132301 [2021-06-05 21:33:18,604 INFO L226 Difference]: Without dead ends: 132286 [2021-06-05 21:33:18,605 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:33:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132286 states. [2021-06-05 21:33:21,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132286 to 131160. [2021-06-05 21:33:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131160 states, 131159 states have (on average 3.023116980153859) internal successors, (396509), 131159 states have internal predecessors, (396509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:21,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131160 states to 131160 states and 396509 transitions. [2021-06-05 21:33:21,966 INFO L78 Accepts]: Start accepts. Automaton has 131160 states and 396509 transitions. Word has length 24 [2021-06-05 21:33:21,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:21,967 INFO L482 AbstractCegarLoop]: Abstraction has 131160 states and 396509 transitions. [2021-06-05 21:33:21,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:21,967 INFO L276 IsEmpty]: Start isEmpty. Operand 131160 states and 396509 transitions. [2021-06-05 21:33:22,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:33:22,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:22,012 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:22,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10026,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:22,213 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:22,213 INFO L82 PathProgramCache]: Analyzing trace with hash 629585942, now seen corresponding path program 317 times [2021-06-05 21:33:22,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:22,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481328403] [2021-06-05 21:33:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:22,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:22,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481328403] [2021-06-05 21:33:22,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481328403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:22,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825603086] [2021-06-05 21:33:22,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:22,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:33:22,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:22,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:33:22,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:33:22,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825603086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:22,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:22,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-06-05 21:33:22,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816916832] [2021-06-05 21:33:22,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:33:22,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:22,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:33:22,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:33:22,379 INFO L87 Difference]: Start difference. First operand 131160 states and 396509 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:22,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:22,985 INFO L93 Difference]: Finished difference Result 131749 states and 397717 transitions. [2021-06-05 21:33:22,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:33:22,985 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:33:22,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:23,249 INFO L225 Difference]: With dead ends: 131749 [2021-06-05 21:33:23,249 INFO L226 Difference]: Without dead ends: 131743 [2021-06-05 21:33:23,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:33:23,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131743 states. [2021-06-05 21:33:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131743 to 131160. [2021-06-05 21:33:25,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131160 states, 131159 states have (on average 3.023109355820035) internal successors, (396508), 131159 states have internal predecessors, (396508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131160 states to 131160 states and 396508 transitions. [2021-06-05 21:33:26,609 INFO L78 Accepts]: Start accepts. Automaton has 131160 states and 396508 transitions. Word has length 24 [2021-06-05 21:33:26,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:26,609 INFO L482 AbstractCegarLoop]: Abstraction has 131160 states and 396508 transitions. [2021-06-05 21:33:26,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:26,609 INFO L276 IsEmpty]: Start isEmpty. Operand 131160 states and 396508 transitions. [2021-06-05 21:33:26,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:33:26,716 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:26,717 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:26,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10027 [2021-06-05 21:33:26,917 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:26,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:26,917 INFO L82 PathProgramCache]: Analyzing trace with hash -89034798, now seen corresponding path program 318 times [2021-06-05 21:33:26,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:26,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851096502] [2021-06-05 21:33:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:33:26,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:26,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851096502] [2021-06-05 21:33:26,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851096502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:26,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225390340] [2021-06-05 21:33:26,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:27,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:33:27,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:27,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:33:27,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:33:27,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225390340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:27,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:27,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:33:27,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205486020] [2021-06-05 21:33:27,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:33:27,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:27,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:33:27,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:33:27,045 INFO L87 Difference]: Start difference. First operand 131160 states and 396508 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:27,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:27,553 INFO L93 Difference]: Finished difference Result 131436 states and 396919 transitions. [2021-06-05 21:33:27,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:33:27,554 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:33:27,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:27,827 INFO L225 Difference]: With dead ends: 131436 [2021-06-05 21:33:27,827 INFO L226 Difference]: Without dead ends: 131434 [2021-06-05 21:33:27,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:33:27,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131434 states. [2021-06-05 21:33:30,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131434 to 131152. [2021-06-05 21:33:30,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131152 states, 131151 states have (on average 3.0228438974922036) internal successors, (396449), 131151 states have internal predecessors, (396449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:30,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131152 states to 131152 states and 396449 transitions. [2021-06-05 21:33:30,652 INFO L78 Accepts]: Start accepts. Automaton has 131152 states and 396449 transitions. Word has length 24 [2021-06-05 21:33:30,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:30,652 INFO L482 AbstractCegarLoop]: Abstraction has 131152 states and 396449 transitions. [2021-06-05 21:33:30,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:30,652 INFO L276 IsEmpty]: Start isEmpty. Operand 131152 states and 396449 transitions. [2021-06-05 21:33:30,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:33:30,699 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:30,699 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:30,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10028 [2021-06-05 21:33:30,899 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:30,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:30,899 INFO L82 PathProgramCache]: Analyzing trace with hash 561470900, now seen corresponding path program 319 times [2021-06-05 21:33:30,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:30,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705425495] [2021-06-05 21:33:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:33:30,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:30,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705425495] [2021-06-05 21:33:30,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705425495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:30,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189812991] [2021-06-05 21:33:30,970 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 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:30,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:33:30,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:33:31,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189812991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:31,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:31,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-06-05 21:33:31,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959243985] [2021-06-05 21:33:31,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:33:31,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:31,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:33:31,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:33:31,031 INFO L87 Difference]: Start difference. First operand 131152 states and 396449 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:32,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:32,116 INFO L93 Difference]: Finished difference Result 131396 states and 396804 transitions. [2021-06-05 21:33:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:33:32,117 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:33:32,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:32,380 INFO L225 Difference]: With dead ends: 131396 [2021-06-05 21:33:32,380 INFO L226 Difference]: Without dead ends: 131393 [2021-06-05 21:33:32,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=214, Invalid=436, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:33:32,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131393 states. [2021-06-05 21:33:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131393 to 131141. [2021-06-05 21:33:34,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.0221976513649533) internal successors, (396331), 131140 states have internal predecessors, (396331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:35,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396331 transitions. [2021-06-05 21:33:35,164 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396331 transitions. Word has length 24 [2021-06-05 21:33:35,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:35,164 INFO L482 AbstractCegarLoop]: Abstraction has 131141 states and 396331 transitions. [2021-06-05 21:33:35,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:35,164 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396331 transitions. [2021-06-05 21:33:35,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:33:35,209 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:35,209 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:35,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10029,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:35,410 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:35,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:35,410 INFO L82 PathProgramCache]: Analyzing trace with hash -511614480, now seen corresponding path program 320 times [2021-06-05 21:33:35,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:35,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351389476] [2021-06-05 21:33:35,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:35,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:35,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351389476] [2021-06-05 21:33:35,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351389476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:35,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842699477] [2021-06-05 21:33:35,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:35,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:33:35,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:35,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:33:35,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:33:35,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842699477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:35,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:35,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-06-05 21:33:35,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511112653] [2021-06-05 21:33:35,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:33:35,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:35,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:33:35,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:33:35,626 INFO L87 Difference]: Start difference. First operand 131141 states and 396331 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:36,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:36,812 INFO L93 Difference]: Finished difference Result 131390 states and 396692 transitions. [2021-06-05 21:33:36,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:33:36,812 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:33:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:37,130 INFO L225 Difference]: With dead ends: 131390 [2021-06-05 21:33:37,130 INFO L226 Difference]: Without dead ends: 131385 [2021-06-05 21:33:37,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:33:37,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131385 states. [2021-06-05 21:33:39,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131385 to 131141. [2021-06-05 21:33:39,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.0206191856031723) internal successors, (396124), 131140 states have internal predecessors, (396124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396124 transitions. [2021-06-05 21:33:39,920 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396124 transitions. Word has length 24 [2021-06-05 21:33:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:39,920 INFO L482 AbstractCegarLoop]: Abstraction has 131141 states and 396124 transitions. [2021-06-05 21:33:39,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:39,920 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396124 transitions. [2021-06-05 21:33:39,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:33:39,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:39,968 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:40,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10030,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:40,168 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:40,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:40,168 INFO L82 PathProgramCache]: Analyzing trace with hash 582477108, now seen corresponding path program 321 times [2021-06-05 21:33:40,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:40,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907840281] [2021-06-05 21:33:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:40,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:40,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907840281] [2021-06-05 21:33:40,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907840281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:40,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493516022] [2021-06-05 21:33:40,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:40,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:33:40,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:40,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:33:40,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:40,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493516022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:40,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:40,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:33:40,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191618689] [2021-06-05 21:33:40,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:33:40,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:40,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:33:40,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:33:40,327 INFO L87 Difference]: Start difference. First operand 131141 states and 396124 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:41,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:41,562 INFO L93 Difference]: Finished difference Result 133913 states and 402552 transitions. [2021-06-05 21:33:41,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:33:41,562 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:33:41,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:41,833 INFO L225 Difference]: With dead ends: 133913 [2021-06-05 21:33:41,833 INFO L226 Difference]: Without dead ends: 133910 [2021-06-05 21:33:41,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:33:41,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133910 states. [2021-06-05 21:33:44,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133910 to 131141. [2021-06-05 21:33:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.020283666310813) internal successors, (396080), 131140 states have internal predecessors, (396080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:44,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396080 transitions. [2021-06-05 21:33:44,601 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396080 transitions. Word has length 24 [2021-06-05 21:33:44,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:44,602 INFO L482 AbstractCegarLoop]: Abstraction has 131141 states and 396080 transitions. [2021-06-05 21:33:44,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:44,602 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396080 transitions. [2021-06-05 21:33:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:33:44,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:44,661 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:44,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10031,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:44,884 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:44,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:44,885 INFO L82 PathProgramCache]: Analyzing trace with hash 139577968, now seen corresponding path program 322 times [2021-06-05 21:33:44,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:44,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642360837] [2021-06-05 21:33:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:33:44,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:44,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642360837] [2021-06-05 21:33:44,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642360837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:44,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359991524] [2021-06-05 21:33:44,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:44,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:33:44,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:44,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:33:44,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:33:45,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359991524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:45,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:45,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-06-05 21:33:45,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301161133] [2021-06-05 21:33:45,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:33:45,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:45,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:33:45,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:33:45,034 INFO L87 Difference]: Start difference. First operand 131141 states and 396080 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:46,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:46,221 INFO L93 Difference]: Finished difference Result 132975 states and 400018 transitions. [2021-06-05 21:33:46,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:33:46,221 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:33:46,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:46,511 INFO L225 Difference]: With dead ends: 132975 [2021-06-05 21:33:46,512 INFO L226 Difference]: Without dead ends: 132971 [2021-06-05 21:33:46,512 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:33:46,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132971 states. [2021-06-05 21:33:48,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132971 to 131141. [2021-06-05 21:33:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.020253164556962) internal successors, (396076), 131140 states have internal predecessors, (396076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:49,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 396076 transitions. [2021-06-05 21:33:49,098 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 396076 transitions. Word has length 24 [2021-06-05 21:33:49,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:49,098 INFO L482 AbstractCegarLoop]: Abstraction has 131141 states and 396076 transitions. [2021-06-05 21:33:49,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:49,098 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 396076 transitions. [2021-06-05 21:33:49,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:33:49,147 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:49,147 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:49,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10032,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:49,347 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:49,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:49,347 INFO L82 PathProgramCache]: Analyzing trace with hash -705393484, now seen corresponding path program 323 times [2021-06-05 21:33:49,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:49,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621511036] [2021-06-05 21:33:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:49,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:49,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621511036] [2021-06-05 21:33:49,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621511036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:49,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782692884] [2021-06-05 21:33:49,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:49,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:33:49,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:49,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:33:49,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:33:49,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782692884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:49,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:49,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-06-05 21:33:49,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833159107] [2021-06-05 21:33:49,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:33:49,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:49,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:33:49,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:33:49,504 INFO L87 Difference]: Start difference. First operand 131141 states and 396076 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:50,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:50,648 INFO L93 Difference]: Finished difference Result 132986 states and 400023 transitions. [2021-06-05 21:33:50,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:33:50,649 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:33:50,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:50,957 INFO L225 Difference]: With dead ends: 132986 [2021-06-05 21:33:50,957 INFO L226 Difference]: Without dead ends: 132971 [2021-06-05 21:33:50,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:33:51,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132971 states. [2021-06-05 21:33:53,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132971 to 131201. [2021-06-05 21:33:53,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131201 states, 131200 states have (on average 3.0197713414634144) internal successors, (396194), 131200 states have internal predecessors, (396194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:53,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131201 states to 131201 states and 396194 transitions. [2021-06-05 21:33:53,550 INFO L78 Accepts]: Start accepts. Automaton has 131201 states and 396194 transitions. Word has length 24 [2021-06-05 21:33:53,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:53,550 INFO L482 AbstractCegarLoop]: Abstraction has 131201 states and 396194 transitions. [2021-06-05 21:33:53,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:53,550 INFO L276 IsEmpty]: Start isEmpty. Operand 131201 states and 396194 transitions. [2021-06-05 21:33:53,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:33:53,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:53,596 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:53,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10033 [2021-06-05 21:33:53,805 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:53,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:53,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1129704720, now seen corresponding path program 324 times [2021-06-05 21:33:53,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:53,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008159072] [2021-06-05 21:33:53,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:53,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:53,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008159072] [2021-06-05 21:33:53,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008159072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:53,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271357099] [2021-06-05 21:33:53,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:53,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:33:53,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:33:53,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:33:53,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:53,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271357099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:53,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:53,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 21:33:53,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342882946] [2021-06-05 21:33:53,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:33:53,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:53,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:33:53,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:33:53,965 INFO L87 Difference]: Start difference. First operand 131201 states and 396194 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:54,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:54,646 INFO L93 Difference]: Finished difference Result 131929 states and 397683 transitions. [2021-06-05 21:33:54,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:33:54,646 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:33:54,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:55,532 INFO L225 Difference]: With dead ends: 131929 [2021-06-05 21:33:55,532 INFO L226 Difference]: Without dead ends: 131923 [2021-06-05 21:33:55,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:33:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131923 states. [2021-06-05 21:33:57,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131923 to 131201. [2021-06-05 21:33:57,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131201 states, 131200 states have (on average 3.019763719512195) internal successors, (396193), 131200 states have internal predecessors, (396193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131201 states to 131201 states and 396193 transitions. [2021-06-05 21:33:58,183 INFO L78 Accepts]: Start accepts. Automaton has 131201 states and 396193 transitions. Word has length 24 [2021-06-05 21:33:58,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:33:58,183 INFO L482 AbstractCegarLoop]: Abstraction has 131201 states and 396193 transitions. [2021-06-05 21:33:58,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:58,183 INFO L276 IsEmpty]: Start isEmpty. Operand 131201 states and 396193 transitions. [2021-06-05 21:33:58,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:33:58,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:33:58,229 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:33:58,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10034 [2021-06-05 21:33:58,429 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:33:58,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:33:58,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1398451148, now seen corresponding path program 325 times [2021-06-05 21:33:58,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:33:58,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305843018] [2021-06-05 21:33:58,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:33:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:33:58,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:33:58,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305843018] [2021-06-05 21:33:58,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305843018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:58,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397250756] [2021-06-05 21:33:58,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:33:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:33:58,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:33:58,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:33:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:33:58,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397250756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:33:58,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:33:58,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-06-05 21:33:58,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963262654] [2021-06-05 21:33:58,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:33:58,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:33:58,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:33:58,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:33:58,596 INFO L87 Difference]: Start difference. First operand 131201 states and 396193 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:33:59,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:33:59,190 INFO L93 Difference]: Finished difference Result 131858 states and 397549 transitions. [2021-06-05 21:33:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:33:59,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:33:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:33:59,456 INFO L225 Difference]: With dead ends: 131858 [2021-06-05 21:33:59,456 INFO L226 Difference]: Without dead ends: 131851 [2021-06-05 21:33:59,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 183.6ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:33:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131851 states. [2021-06-05 21:34:01,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131851 to 131201. [2021-06-05 21:34:01,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131201 states, 131200 states have (on average 3.0197560975609754) internal successors, (396192), 131200 states have internal predecessors, (396192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131201 states to 131201 states and 396192 transitions. [2021-06-05 21:34:02,724 INFO L78 Accepts]: Start accepts. Automaton has 131201 states and 396192 transitions. Word has length 24 [2021-06-05 21:34:02,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:02,724 INFO L482 AbstractCegarLoop]: Abstraction has 131201 states and 396192 transitions. [2021-06-05 21:34:02,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:02,724 INFO L276 IsEmpty]: Start isEmpty. Operand 131201 states and 396192 transitions. [2021-06-05 21:34:02,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:34:02,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:02,767 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:02,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10035 [2021-06-05 21:34:02,967 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:02,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:02,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1057585994, now seen corresponding path program 326 times [2021-06-05 21:34:02,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:02,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825139941] [2021-06-05 21:34:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:34:03,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:03,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825139941] [2021-06-05 21:34:03,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825139941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:03,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261314117] [2021-06-05 21:34:03,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:03,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:34:03,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:03,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:34:03,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:34:03,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261314117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:03,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:03,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:34:03,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700269873] [2021-06-05 21:34:03,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:34:03,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:03,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:34:03,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:34:03,115 INFO L87 Difference]: Start difference. First operand 131201 states and 396192 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:03,684 INFO L93 Difference]: Finished difference Result 131376 states and 396488 transitions. [2021-06-05 21:34:03,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:34:03,684 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:34:03,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:03,962 INFO L225 Difference]: With dead ends: 131376 [2021-06-05 21:34:03,962 INFO L226 Difference]: Without dead ends: 131372 [2021-06-05 21:34:03,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:34:04,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131372 states. [2021-06-05 21:34:06,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131372 to 131153. [2021-06-05 21:34:06,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131153 states, 131152 states have (on average 3.0198014517506406) internal successors, (396053), 131152 states have internal predecessors, (396053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:06,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131153 states to 131153 states and 396053 transitions. [2021-06-05 21:34:06,877 INFO L78 Accepts]: Start accepts. Automaton has 131153 states and 396053 transitions. Word has length 24 [2021-06-05 21:34:06,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:06,877 INFO L482 AbstractCegarLoop]: Abstraction has 131153 states and 396053 transitions. [2021-06-05 21:34:06,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:06,877 INFO L276 IsEmpty]: Start isEmpty. Operand 131153 states and 396053 transitions. [2021-06-05 21:34:07,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:34:07,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:07,401 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:07,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10036,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:07,602 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:07,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:07,602 INFO L82 PathProgramCache]: Analyzing trace with hash 257571116, now seen corresponding path program 327 times [2021-06-05 21:34:07,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:07,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869727464] [2021-06-05 21:34:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:34:07,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:07,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869727464] [2021-06-05 21:34:07,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869727464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:07,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860073228] [2021-06-05 21:34:07,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:07,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:34:07,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:07,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:34:07,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 27 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:34:07,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860073228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:07,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:07,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:34:07,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151158361] [2021-06-05 21:34:07,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:34:07,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:07,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:34:07,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:34:07,740 INFO L87 Difference]: Start difference. First operand 131153 states and 396053 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:34:08,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:08,312 INFO L93 Difference]: Finished difference Result 131624 states and 397009 transitions. [2021-06-05 21:34:08,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:34:08,312 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 24 [2021-06-05 21:34:08,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:08,570 INFO L225 Difference]: With dead ends: 131624 [2021-06-05 21:34:08,570 INFO L226 Difference]: Without dead ends: 131621 [2021-06-05 21:34:08,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:34:08,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131621 states. [2021-06-05 21:34:10,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131621 to 131141. [2021-06-05 21:34:11,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131141 states, 131140 states have (on average 3.0196278786030195) internal successors, (395994), 131140 states have internal predecessors, (395994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:11,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131141 states to 131141 states and 395994 transitions. [2021-06-05 21:34:11,467 INFO L78 Accepts]: Start accepts. Automaton has 131141 states and 395994 transitions. Word has length 24 [2021-06-05 21:34:11,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:11,467 INFO L482 AbstractCegarLoop]: Abstraction has 131141 states and 395994 transitions. [2021-06-05 21:34:11,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21:34:11,467 INFO L276 IsEmpty]: Start isEmpty. Operand 131141 states and 395994 transitions. [2021-06-05 21:34:11,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:34:11,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:11,511 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:11,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10037 [2021-06-05 21:34:11,712 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:11,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:11,712 INFO L82 PathProgramCache]: Analyzing trace with hash -185328024, now seen corresponding path program 328 times [2021-06-05 21:34:11,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:11,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457200456] [2021-06-05 21:34:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:11,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:11,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457200456] [2021-06-05 21:34:11,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457200456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:11,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529963262] [2021-06-05 21:34:11,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:11,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:34:11,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:11,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:34:11,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:34:11,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529963262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:11,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:11,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-06-05 21:34:11,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599478249] [2021-06-05 21:34:11,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:34:11,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:11,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:34:11,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:34:11,853 INFO L87 Difference]: Start difference. First operand 131141 states and 395994 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:12,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:12,948 INFO L93 Difference]: Finished difference Result 131617 states and 396954 transitions. [2021-06-05 21:34:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:34:12,948 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:34:12,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:13,202 INFO L225 Difference]: With dead ends: 131617 [2021-06-05 21:34:13,202 INFO L226 Difference]: Without dead ends: 131609 [2021-06-05 21:34:13,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:34:13,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131609 states. [2021-06-05 21:34:15,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131609 to 131143. [2021-06-05 21:34:15,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131143 states, 131142 states have (on average 3.01929969041192) internal successors, (395957), 131142 states have internal predecessors, (395957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131143 states to 131143 states and 395957 transitions. [2021-06-05 21:34:15,992 INFO L78 Accepts]: Start accepts. Automaton has 131143 states and 395957 transitions. Word has length 24 [2021-06-05 21:34:15,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:15,992 INFO L482 AbstractCegarLoop]: Abstraction has 131143 states and 395957 transitions. [2021-06-05 21:34:15,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:15,992 INFO L276 IsEmpty]: Start isEmpty. Operand 131143 states and 395957 transitions. [2021-06-05 21:34:16,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:34:16,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:16,038 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:16,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10038,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:16,238 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:16,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:16,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1030299476, now seen corresponding path program 329 times [2021-06-05 21:34:16,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:16,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733629666] [2021-06-05 21:34:16,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:16,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:16,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733629666] [2021-06-05 21:34:16,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733629666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:16,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165396205] [2021-06-05 21:34:16,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:16,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:34:16,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:16,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:34:16,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 21:34:16,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165396205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:16,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:16,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-06-05 21:34:16,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569349304] [2021-06-05 21:34:16,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:34:16,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:16,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:34:16,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:34:16,387 INFO L87 Difference]: Start difference. First operand 131143 states and 395957 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:17,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:17,574 INFO L93 Difference]: Finished difference Result 131841 states and 397374 transitions. [2021-06-05 21:34:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:34:17,575 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:34:17,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:17,854 INFO L225 Difference]: With dead ends: 131841 [2021-06-05 21:34:17,854 INFO L226 Difference]: Without dead ends: 131836 [2021-06-05 21:34:17,855 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:34:17,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131836 states. [2021-06-05 21:34:20,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131836 to 131145. [2021-06-05 21:34:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131145 states, 131144 states have (on average 3.0192765204660525) internal successors, (395960), 131144 states have internal predecessors, (395960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131145 states to 131145 states and 395960 transitions. [2021-06-05 21:34:20,584 INFO L78 Accepts]: Start accepts. Automaton has 131145 states and 395960 transitions. Word has length 24 [2021-06-05 21:34:20,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:20,584 INFO L482 AbstractCegarLoop]: Abstraction has 131145 states and 395960 transitions. [2021-06-05 21:34:20,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:20,584 INFO L276 IsEmpty]: Start isEmpty. Operand 131145 states and 395960 transitions. [2021-06-05 21:34:20,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:34:20,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:20,635 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:20,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10039 [2021-06-05 21:34:20,849 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:20,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:20,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1454610712, now seen corresponding path program 330 times [2021-06-05 21:34:20,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:20,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074896306] [2021-06-05 21:34:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:20,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:20,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074896306] [2021-06-05 21:34:20,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074896306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:20,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506973615] [2021-06-05 21:34:20,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:20,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:34:20,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:20,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:34:20,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:21,003 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:34:21,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506973615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:21,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:21,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:34:21,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036112303] [2021-06-05 21:34:21,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:34:21,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:21,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:34:21,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:34:21,004 INFO L87 Difference]: Start difference. First operand 131145 states and 395960 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 21:34:22,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:22,202 INFO L93 Difference]: Finished difference Result 131823 states and 397349 transitions. [2021-06-05 21:34:22,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:34:22,203 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 24 [2021-06-05 21:34:22,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:22,486 INFO L225 Difference]: With dead ends: 131823 [2021-06-05 21:34:22,486 INFO L226 Difference]: Without dead ends: 131817 [2021-06-05 21:34:22,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:34:22,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131817 states. [2021-06-05 21:34:24,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131817 to 131145. [2021-06-05 21:34:24,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131145 states, 131144 states have (on average 3.019253644848411) internal successors, (395957), 131144 states have internal predecessors, (395957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131145 states to 131145 states and 395957 transitions. [2021-06-05 21:34:25,036 INFO L78 Accepts]: Start accepts. Automaton has 131145 states and 395957 transitions. Word has length 24 [2021-06-05 21:34:25,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:25,036 INFO L482 AbstractCegarLoop]: Abstraction has 131145 states and 395957 transitions. [2021-06-05 21:34:25,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 21:34:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 131145 states and 395957 transitions. [2021-06-05 21:34:25,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:34:25,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:25,087 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:25,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10040,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:25,288 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:25,288 INFO L82 PathProgramCache]: Analyzing trace with hash 266264850, now seen corresponding path program 331 times [2021-06-05 21:34:25,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:25,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883924142] [2021-06-05 21:34:25,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:25,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:25,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883924142] [2021-06-05 21:34:25,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883924142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:25,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639471963] [2021-06-05 21:34:25,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:25,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:34:25,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 41 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:34:25,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639471963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:25,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:25,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-06-05 21:34:25,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848238634] [2021-06-05 21:34:25,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:34:25,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:25,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:34:25,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:34:25,438 INFO L87 Difference]: Start difference. First operand 131145 states and 395957 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:26,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:26,046 INFO L93 Difference]: Finished difference Result 131611 states and 396867 transitions. [2021-06-05 21:34:26,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:34:26,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:34:26,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:26,894 INFO L225 Difference]: With dead ends: 131611 [2021-06-05 21:34:26,894 INFO L226 Difference]: Without dead ends: 131596 [2021-06-05 21:34:26,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:34:26,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131596 states. [2021-06-05 21:34:29,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131596 to 131179. [2021-06-05 21:34:29,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131179 states, 131178 states have (on average 3.0187988839592004) internal successors, (396000), 131178 states have internal predecessors, (396000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:29,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131179 states to 131179 states and 396000 transitions. [2021-06-05 21:34:29,541 INFO L78 Accepts]: Start accepts. Automaton has 131179 states and 396000 transitions. Word has length 24 [2021-06-05 21:34:29,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:34:29,541 INFO L482 AbstractCegarLoop]: Abstraction has 131179 states and 396000 transitions. [2021-06-05 21:34:29,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:29,541 INFO L276 IsEmpty]: Start isEmpty. Operand 131179 states and 396000 transitions. [2021-06-05 21:34:29,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:34:29,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:34:29,587 INFO L554 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:34:29,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10041,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:29,787 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:34:29,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:34:29,787 INFO L82 PathProgramCache]: Analyzing trace with hash -158046386, now seen corresponding path program 332 times [2021-06-05 21:34:29,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:34:29,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921587232] [2021-06-05 21:34:29,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:34:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:34:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:34:29,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:34:29,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921587232] [2021-06-05 21:34:29,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921587232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:29,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572453308] [2021-06-05 21:34:29,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:29,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:34:29,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:34:29,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:34:29,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:34:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:34:29,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572453308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:34:29,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:34:29,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-06-05 21:34:29,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568636989] [2021-06-05 21:34:29,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:34:29,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:34:29,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:34:29,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:34:29,945 INFO L87 Difference]: Start difference. First operand 131179 states and 396000 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:34:30,601 INFO L93 Difference]: Finished difference Result 132080 states and 397867 transitions. [2021-06-05 21:34:30,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:34:30,601 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:34:30,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:34:30,860 INFO L225 Difference]: With dead ends: 132080 [2021-06-05 21:34:30,860 INFO L226 Difference]: Without dead ends: 132074 [2021-06-05 21:34:30,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=324, Invalid=732, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:34:31,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132074 states. [2021-06-05 21:34:33,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132074 to 131189. Received shutdown request... [2021-06-05 21:34:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131189 states, 131188 states have (on average 3.018713601853828) internal successors, (396019), 131188 states have internal predecessors, (396019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:34:33,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10042,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:34:33,894 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 21:34:33,897 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 21:34:33,898 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 21:34:33,898 INFO L202 PluginConnector]: Adding new model unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 09:34:33 BasicIcfg [2021-06-05 21:34:33,898 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 21:34:33,898 INFO L168 Benchmark]: Toolchain (without parser) took 769909.83 ms. Allocated memory was 354.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 334.5 MB in the beginning and 9.4 GB in the end (delta: -9.1 GB). Peak memory consumption was 7.3 GB. Max. memory is 16.0 GB. [2021-06-05 21:34:33,899 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 354.4 MB. Free memory was 335.7 MB in the beginning and 335.6 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:34:33,899 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.29 ms. Allocated memory is still 354.4 MB. Free memory was 334.4 MB in the beginning and 333.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 21:34:33,899 INFO L168 Benchmark]: Boogie Preprocessor took 15.81 ms. Allocated memory is still 354.4 MB. Free memory was 333.0 MB in the beginning and 332.1 MB in the end (delta: 943.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 21:34:33,899 INFO L168 Benchmark]: RCFGBuilder took 278.35 ms. Allocated memory is still 354.4 MB. Free memory was 332.0 MB in the beginning and 317.2 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 21:34:33,899 INFO L168 Benchmark]: TraceAbstraction took 769589.99 ms. Allocated memory was 354.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 316.7 MB in the beginning and 9.4 GB in the end (delta: -9.1 GB). Peak memory consumption was 7.3 GB. Max. memory is 16.0 GB. [2021-06-05 21:34:33,899 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 354.4 MB. Free memory was 335.7 MB in the beginning and 335.6 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.29 ms. Allocated memory is still 354.4 MB. Free memory was 334.4 MB in the beginning and 333.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.81 ms. Allocated memory is still 354.4 MB. Free memory was 333.0 MB in the beginning and 332.1 MB in the end (delta: 943.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 278.35 ms. Allocated memory is still 354.4 MB. Free memory was 332.0 MB in the beginning and 317.2 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 769589.99 ms. Allocated memory was 354.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 316.7 MB in the beginning and 9.4 GB in the end (delta: -9.1 GB). Peak memory consumption was 7.3 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 769479.5ms, OverallIterations: 336, TraceHistogramMax: 12, EmptinessCheckTime: 6302.3ms, AutomataDifference: 151877.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5694 SDtfs, 26102 SDslu, 33958 SDs, 0 SdLazy, 45783 SolverSat, 8603 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20489.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14233 GetRequests, 6522 SyntacticMatches, 166 SemanticMatches, 7545 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48363 ImplicationChecksByTransitivity, 50078.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=131201occurred in iteration=327, InterpolantAutomatonStates: 6637, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 298732.5ms AutomataMinimizationTime, 336 MinimizatonAttempts, 540016 StatesRemovedByMinimization, 330 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1069.2ms SsaConstructionTime, 3792.5ms SatisfiabilityAnalysisTime, 232126.8ms InterpolantComputationTime, 13685 NumberOfCodeBlocks, 13684 NumberOfCodeBlocksAsserted, 1507 NumberOfCheckSat, 13016 ConstructedInterpolants, 0 QuantifiedInterpolants, 57448 SizeOfPredicates, 172 NumberOfNonLiveVariables, 27808 ConjunctsInSsa, 4653 ConjunctsInUnsatCore, 669 InterpolantComputations, 3 PerfectInterpolantSequences, 12122/33106 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