/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/parallel/min-max-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:23:25,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:23:25,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:23:25,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:23:25,360 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 22:23:25,378 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:23:25,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:23:25,378 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:23:25,378 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:23:25,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:23:25,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:23:25,380 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:23:25,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:23:25,380 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:23:25,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:23:25,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:23:25,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:23:25,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:23:25,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:23:25,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:23:25,381 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:23:25,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:23:25,381 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:23:25,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:23:25,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:23:25,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:23:25,382 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:23:25,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:23:25,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:23:25,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:23:25,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:23:25,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:23:25,382 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:23:25,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:23:25,383 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:23:25,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:23:25,383 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:23:25,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:23:25,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:23:25,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:23:25,679 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:23:25,681 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:23:25,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl [2021-06-05 22:23:25,682 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl' [2021-06-05 22:23:25,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:23:25,722 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:23:25,723 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:23:25,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:23:25,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:23:25,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:23:25" (1/1) ... [2021-06-05 22:23:25,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:23:25" (1/1) ... [2021-06-05 22:23:25,752 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:23:25,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:23:25,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:23:25,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:23:25,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:23:25" (1/1) ... [2021-06-05 22:23:25,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:23:25" (1/1) ... [2021-06-05 22:23:25,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:23:25" (1/1) ... [2021-06-05 22:23:25,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:23:25" (1/1) ... [2021-06-05 22:23:25,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:23:25" (1/1) ... [2021-06-05 22:23:25,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:23:25" (1/1) ... [2021-06-05 22:23:25,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:23:25" (1/1) ... [2021-06-05 22:23:25,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:23:25,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:23:25,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:23:25,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:23:25,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:23:25" (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 22:23:25,862 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:23:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:23:25,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:23:25,863 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:23:25,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:23:25,864 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:23:25,864 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:23:25,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:23:25,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:23:25,864 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 22:23:25,865 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 22:23:25,866 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 22:23:25,866 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 22:23:25,866 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 22:23:25,866 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 22:23:25,867 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-05 22:23:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-05 22:23:25,867 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-05 22:23:25,868 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 22:23:26,109 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:23:26,109 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 22:23:26,111 INFO L202 PluginConnector]: Adding new model min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:23:26 BoogieIcfgContainer [2021-06-05 22:23:26,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:23:26,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:23:26,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:23:26,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:23:26,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:23:25" (1/2) ... [2021-06-05 22:23:26,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe3e5a5 and model type min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:23:26, skipping insertion in model container [2021-06-05 22:23:26,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:23:26" (2/2) ... [2021-06-05 22:23:26,132 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-2.wvr.bpl [2021-06-05 22:23:26,137 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:23:26,137 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:23:26,137 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:23:26,138 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:23:26,238 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-06-05 22:23:26,253 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-05 22:23:26,269 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:23:26,269 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:23:26,269 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:23:26,269 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:23:26,270 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:23:26,270 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:23:26,270 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:23:26,274 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:23:26,281 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 46 transitions, 132 flow [2021-06-05 22:23:26,756 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5826 states, 5824 states have (on average 4.669127747252747) internal successors, (27193), 5825 states have internal predecessors, (27193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand has 5826 states, 5824 states have (on average 4.669127747252747) internal successors, (27193), 5825 states have internal predecessors, (27193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:26,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 22:23:26,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:26,844 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:26,845 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:26,852 INFO L82 PathProgramCache]: Analyzing trace with hash -2007240255, now seen corresponding path program 1 times [2021-06-05 22:23:26,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:26,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349554290] [2021-06-05 22:23:26,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:27,067 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 22:23:27,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:27,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349554290] [2021-06-05 22:23:27,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349554290] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:23:27,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:23:27,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:23:27,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22133711] [2021-06-05 22:23:27,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:23:27,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:27,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:23:27,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:23:27,114 INFO L87 Difference]: Start difference. First operand has 5826 states, 5824 states have (on average 4.669127747252747) internal successors, (27193), 5825 states have internal predecessors, (27193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 22:23:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:27,682 INFO L93 Difference]: Finished difference Result 23171 states and 106643 transitions. [2021-06-05 22:23:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:23:27,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 27 [2021-06-05 22:23:27,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:27,968 INFO L225 Difference]: With dead ends: 23171 [2021-06-05 22:23:27,969 INFO L226 Difference]: Without dead ends: 15763 [2021-06-05 22:23:27,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:23:28,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15763 states. [2021-06-05 22:23:28,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15763 to 7383. [2021-06-05 22:23:28,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7383 states, 7382 states have (on average 4.632078027634788) internal successors, (34194), 7382 states have internal predecessors, (34194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:28,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7383 states to 7383 states and 34194 transitions. [2021-06-05 22:23:28,720 INFO L78 Accepts]: Start accepts. Automaton has 7383 states and 34194 transitions. Word has length 27 [2021-06-05 22:23:28,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:28,721 INFO L482 AbstractCegarLoop]: Abstraction has 7383 states and 34194 transitions. [2021-06-05 22:23:28,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 22:23:28,722 INFO L276 IsEmpty]: Start isEmpty. Operand 7383 states and 34194 transitions. [2021-06-05 22:23:28,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 22:23:28,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:28,823 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:28,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:23:28,824 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:28,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:28,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1823966019, now seen corresponding path program 2 times [2021-06-05 22:23:28,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:28,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562428647] [2021-06-05 22:23:28,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:28,883 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 22:23:28,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:28,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562428647] [2021-06-05 22:23:28,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562428647] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:23:28,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:23:28,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:23:28,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366471137] [2021-06-05 22:23:28,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:23:28,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:28,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:23:28,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:23:28,889 INFO L87 Difference]: Start difference. First operand 7383 states and 34194 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 22:23:29,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:29,030 INFO L93 Difference]: Finished difference Result 9446 states and 43398 transitions. [2021-06-05 22:23:29,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:23:29,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2021-06-05 22:23:29,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:29,062 INFO L225 Difference]: With dead ends: 9446 [2021-06-05 22:23:29,062 INFO L226 Difference]: Without dead ends: 6583 [2021-06-05 22:23:29,063 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:23:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2021-06-05 22:23:29,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6583. [2021-06-05 22:23:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6583 states, 6582 states have (on average 4.564570039501671) internal successors, (30044), 6582 states have internal predecessors, (30044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:29,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 30044 transitions. [2021-06-05 22:23:29,365 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 30044 transitions. Word has length 27 [2021-06-05 22:23:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:29,366 INFO L482 AbstractCegarLoop]: Abstraction has 6583 states and 30044 transitions. [2021-06-05 22:23:29,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 22:23:29,367 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 30044 transitions. [2021-06-05 22:23:29,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 22:23:29,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:29,452 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:29,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 22:23:29,452 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:29,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:29,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1516614145, now seen corresponding path program 3 times [2021-06-05 22:23:29,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:29,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133565266] [2021-06-05 22:23:29,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:29,505 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 22:23:29,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:29,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133565266] [2021-06-05 22:23:29,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133565266] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:23:29,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:23:29,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:23:29,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512091552] [2021-06-05 22:23:29,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:23:29,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:29,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:23:29,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:23:29,507 INFO L87 Difference]: Start difference. First operand 6583 states and 30044 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 22:23:29,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:29,897 INFO L93 Difference]: Finished difference Result 22801 states and 103818 transitions. [2021-06-05 22:23:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:23:29,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 27 [2021-06-05 22:23:29,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:29,990 INFO L225 Difference]: With dead ends: 22801 [2021-06-05 22:23:29,990 INFO L226 Difference]: Without dead ends: 16593 [2021-06-05 22:23:29,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:23:30,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16593 states. [2021-06-05 22:23:30,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16593 to 6861. [2021-06-05 22:23:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6861 states, 6860 states have (on average 4.574052478134111) internal successors, (31378), 6860 states have internal predecessors, (31378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6861 states to 6861 states and 31378 transitions. [2021-06-05 22:23:30,587 INFO L78 Accepts]: Start accepts. Automaton has 6861 states and 31378 transitions. Word has length 27 [2021-06-05 22:23:30,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:30,587 INFO L482 AbstractCegarLoop]: Abstraction has 6861 states and 31378 transitions. [2021-06-05 22:23:30,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 22:23:30,587 INFO L276 IsEmpty]: Start isEmpty. Operand 6861 states and 31378 transitions. [2021-06-05 22:23:30,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 22:23:30,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:30,610 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:30,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 22:23:30,611 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:30,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:30,611 INFO L82 PathProgramCache]: Analyzing trace with hash -926574681, now seen corresponding path program 4 times [2021-06-05 22:23:30,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:30,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643339994] [2021-06-05 22:23:30,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:30,651 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 22:23:30,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:30,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643339994] [2021-06-05 22:23:30,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643339994] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:23:30,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:23:30,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:23:30,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885155834] [2021-06-05 22:23:30,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:23:30,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:30,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:23:30,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:23:30,655 INFO L87 Difference]: Start difference. First operand 6861 states and 31378 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 22:23:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:30,720 INFO L93 Difference]: Finished difference Result 8424 states and 38332 transitions. [2021-06-05 22:23:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:23:30,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2021-06-05 22:23:30,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:30,747 INFO L225 Difference]: With dead ends: 8424 [2021-06-05 22:23:30,747 INFO L226 Difference]: Without dead ends: 6361 [2021-06-05 22:23:30,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:23:30,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-06-05 22:23:30,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 6361. [2021-06-05 22:23:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6361 states, 6360 states have (on average 4.524842767295597) internal successors, (28778), 6360 states have internal predecessors, (28778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:31,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6361 states to 6361 states and 28778 transitions. [2021-06-05 22:23:31,050 INFO L78 Accepts]: Start accepts. Automaton has 6361 states and 28778 transitions. Word has length 27 [2021-06-05 22:23:31,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:31,050 INFO L482 AbstractCegarLoop]: Abstraction has 6361 states and 28778 transitions. [2021-06-05 22:23:31,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 22:23:31,051 INFO L276 IsEmpty]: Start isEmpty. Operand 6361 states and 28778 transitions. [2021-06-05 22:23:31,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:23:31,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:31,079 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:31,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 22:23:31,080 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:31,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:31,080 INFO L82 PathProgramCache]: Analyzing trace with hash 446831401, now seen corresponding path program 1 times [2021-06-05 22:23:31,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:31,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33280458] [2021-06-05 22:23:31,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:31,225 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 22:23:31,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:31,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33280458] [2021-06-05 22:23:31,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33280458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:31,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086091221] [2021-06-05 22:23:31,227 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 22:23:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:31,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 22:23:31,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:31,536 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 22:23:31,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086091221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:31,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:31,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 22:23:31,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774044183] [2021-06-05 22:23:31,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:23:31,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:31,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:23:31,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:23:31,538 INFO L87 Difference]: Start difference. First operand 6361 states and 28778 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 22:23:31,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:31,711 INFO L93 Difference]: Finished difference Result 13742 states and 61751 transitions. [2021-06-05 22:23:31,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:23:31,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 30 [2021-06-05 22:23:31,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:31,784 INFO L225 Difference]: With dead ends: 13742 [2021-06-05 22:23:31,785 INFO L226 Difference]: Without dead ends: 13742 [2021-06-05 22:23:31,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:23:31,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2021-06-05 22:23:32,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 7994. [2021-06-05 22:23:32,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7994 states, 7993 states have (on average 4.5614913048917805) internal successors, (36460), 7993 states have internal predecessors, (36460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:32,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7994 states to 7994 states and 36460 transitions. [2021-06-05 22:23:32,160 INFO L78 Accepts]: Start accepts. Automaton has 7994 states and 36460 transitions. Word has length 30 [2021-06-05 22:23:32,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:32,160 INFO L482 AbstractCegarLoop]: Abstraction has 7994 states and 36460 transitions. [2021-06-05 22:23:32,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 22:23:32,161 INFO L276 IsEmpty]: Start isEmpty. Operand 7994 states and 36460 transitions. [2021-06-05 22:23:32,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:23:32,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:32,196 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:32,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:32,419 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:32,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1475397024, now seen corresponding path program 1 times [2021-06-05 22:23:32,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:32,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701908286] [2021-06-05 22:23:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:32,530 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 22:23:32,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:32,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701908286] [2021-06-05 22:23:32,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701908286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:32,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406094220] [2021-06-05 22:23:32,531 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 22:23:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:32,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 22:23:32,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:32,747 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 22:23:32,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406094220] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:23:32,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:23:32,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-06-05 22:23:32,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866821537] [2021-06-05 22:23:32,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:23:32,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:32,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:23:32,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:23:32,749 INFO L87 Difference]: Start difference. First operand 7994 states and 36460 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 22:23:32,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:32,980 INFO L93 Difference]: Finished difference Result 11412 states and 52000 transitions. [2021-06-05 22:23:32,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:23:32,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 30 [2021-06-05 22:23:32,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:33,023 INFO L225 Difference]: With dead ends: 11412 [2021-06-05 22:23:33,023 INFO L226 Difference]: Without dead ends: 11118 [2021-06-05 22:23:33,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:23:33,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11118 states. [2021-06-05 22:23:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11118 to 8742. [2021-06-05 22:23:33,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8742 states, 8741 states have (on average 4.594554398810205) internal successors, (40161), 8741 states have internal predecessors, (40161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 40161 transitions. [2021-06-05 22:23:33,305 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 40161 transitions. Word has length 30 [2021-06-05 22:23:33,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:33,305 INFO L482 AbstractCegarLoop]: Abstraction has 8742 states and 40161 transitions. [2021-06-05 22:23:33,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 22:23:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 40161 transitions. [2021-06-05 22:23:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:23:33,329 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:33,329 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:33,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:33,545 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:33,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:33,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2069837256, now seen corresponding path program 1 times [2021-06-05 22:23:33,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:33,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401427179] [2021-06-05 22:23:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:33,575 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 22:23:33,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:33,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401427179] [2021-06-05 22:23:33,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401427179] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:23:33,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:23:33,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:23:33,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760119339] [2021-06-05 22:23:33,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:23:33,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:33,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:23:33,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:23:33,577 INFO L87 Difference]: Start difference. First operand 8742 states and 40161 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 22:23:33,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:33,719 INFO L93 Difference]: Finished difference Result 15516 states and 70047 transitions. [2021-06-05 22:23:33,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:23:33,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 30 [2021-06-05 22:23:33,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:33,770 INFO L225 Difference]: With dead ends: 15516 [2021-06-05 22:23:33,771 INFO L226 Difference]: Without dead ends: 15386 [2021-06-05 22:23:33,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:23:33,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15386 states. [2021-06-05 22:23:34,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15386 to 12424. [2021-06-05 22:23:34,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12424 states, 12423 states have (on average 4.582065523625533) internal successors, (56923), 12423 states have internal predecessors, (56923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:34,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 56923 transitions. [2021-06-05 22:23:34,301 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 56923 transitions. Word has length 30 [2021-06-05 22:23:34,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:34,302 INFO L482 AbstractCegarLoop]: Abstraction has 12424 states and 56923 transitions. [2021-06-05 22:23:34,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 22:23:34,302 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 56923 transitions. [2021-06-05 22:23:34,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:23:34,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:34,338 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:34,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 22:23:34,338 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:34,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:34,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1099254369, now seen corresponding path program 1 times [2021-06-05 22:23:34,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:34,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927140694] [2021-06-05 22:23:34,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:34,365 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 22:23:34,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:34,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927140694] [2021-06-05 22:23:34,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927140694] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:23:34,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:23:34,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:23:34,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463789960] [2021-06-05 22:23:34,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:23:34,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:34,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:23:34,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:23:34,367 INFO L87 Difference]: Start difference. First operand 12424 states and 56923 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 22:23:34,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:34,673 INFO L93 Difference]: Finished difference Result 22857 states and 102629 transitions. [2021-06-05 22:23:34,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:23:34,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 30 [2021-06-05 22:23:34,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:34,757 INFO L225 Difference]: With dead ends: 22857 [2021-06-05 22:23:34,757 INFO L226 Difference]: Without dead ends: 22667 [2021-06-05 22:23:34,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:23:34,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22667 states. [2021-06-05 22:23:35,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22667 to 18333. [2021-06-05 22:23:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18333 states, 18332 states have (on average 4.602280165830242) internal successors, (84369), 18332 states have internal predecessors, (84369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18333 states to 18333 states and 84369 transitions. [2021-06-05 22:23:35,497 INFO L78 Accepts]: Start accepts. Automaton has 18333 states and 84369 transitions. Word has length 30 [2021-06-05 22:23:35,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:35,497 INFO L482 AbstractCegarLoop]: Abstraction has 18333 states and 84369 transitions. [2021-06-05 22:23:35,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 22:23:35,497 INFO L276 IsEmpty]: Start isEmpty. Operand 18333 states and 84369 transitions. [2021-06-05 22:23:35,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:23:35,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:35,538 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:35,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 22:23:35,538 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:35,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:35,539 INFO L82 PathProgramCache]: Analyzing trace with hash -463993696, now seen corresponding path program 2 times [2021-06-05 22:23:35,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:35,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817270174] [2021-06-05 22:23:35,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:35,625 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 22:23:35,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:35,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817270174] [2021-06-05 22:23:35,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817270174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:35,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217875958] [2021-06-05 22:23:35,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:23:35,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:23:35,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:35,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:23:35,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:35,757 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 22:23:35,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217875958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:35,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:35,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-06-05 22:23:35,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929117559] [2021-06-05 22:23:35,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:23:35,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:35,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:23:35,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:23:35,758 INFO L87 Difference]: Start difference. First operand 18333 states and 84369 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:37,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:37,122 INFO L93 Difference]: Finished difference Result 64631 states and 282480 transitions. [2021-06-05 22:23:37,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:23:37,122 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:23:37,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:37,323 INFO L225 Difference]: With dead ends: 64631 [2021-06-05 22:23:37,323 INFO L226 Difference]: Without dead ends: 50671 [2021-06-05 22:23:37,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 371.9ms TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:23:37,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50671 states. [2021-06-05 22:23:38,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50671 to 22433. [2021-06-05 22:23:38,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22433 states, 22432 states have (on average 4.573511055634808) internal successors, (102593), 22432 states have internal predecessors, (102593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:38,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22433 states to 22433 states and 102593 transitions. [2021-06-05 22:23:38,273 INFO L78 Accepts]: Start accepts. Automaton has 22433 states and 102593 transitions. Word has length 30 [2021-06-05 22:23:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:38,273 INFO L482 AbstractCegarLoop]: Abstraction has 22433 states and 102593 transitions. [2021-06-05 22:23:38,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:38,273 INFO L276 IsEmpty]: Start isEmpty. Operand 22433 states and 102593 transitions. [2021-06-05 22:23:38,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:23:38,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:38,316 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:38,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:38,529 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:38,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1194115521, now seen corresponding path program 2 times [2021-06-05 22:23:38,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:38,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564344365] [2021-06-05 22:23:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:38,556 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 22:23:38,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:38,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564344365] [2021-06-05 22:23:38,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564344365] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:23:38,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:23:38,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:23:38,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086145260] [2021-06-05 22:23:38,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:23:38,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:38,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:23:38,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:23:38,557 INFO L87 Difference]: Start difference. First operand 22433 states and 102593 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 22:23:38,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:38,745 INFO L93 Difference]: Finished difference Result 27166 states and 122184 transitions. [2021-06-05 22:23:38,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:23:38,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 30 [2021-06-05 22:23:38,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:38,821 INFO L225 Difference]: With dead ends: 27166 [2021-06-05 22:23:38,822 INFO L226 Difference]: Without dead ends: 26834 [2021-06-05 22:23:38,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:23:39,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26834 states. [2021-06-05 22:23:39,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26834 to 22633. [2021-06-05 22:23:39,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22633 states, 22632 states have (on average 4.55218275008837) internal successors, (103025), 22632 states have internal predecessors, (103025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:39,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22633 states to 22633 states and 103025 transitions. [2021-06-05 22:23:39,641 INFO L78 Accepts]: Start accepts. Automaton has 22633 states and 103025 transitions. Word has length 30 [2021-06-05 22:23:39,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:39,641 INFO L482 AbstractCegarLoop]: Abstraction has 22633 states and 103025 transitions. [2021-06-05 22:23:39,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 22:23:39,641 INFO L276 IsEmpty]: Start isEmpty. Operand 22633 states and 103025 transitions. [2021-06-05 22:23:39,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:23:39,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:39,689 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:39,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 22:23:39,689 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:39,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:39,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1360704794, now seen corresponding path program 2 times [2021-06-05 22:23:39,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:39,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007510616] [2021-06-05 22:23:39,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:39,714 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 22:23:39,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:39,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007510616] [2021-06-05 22:23:39,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007510616] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:23:39,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:23:39,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:23:39,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580037051] [2021-06-05 22:23:39,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:23:39,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:39,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:23:39,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:23:39,716 INFO L87 Difference]: Start difference. First operand 22633 states and 103025 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 22:23:40,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:40,126 INFO L93 Difference]: Finished difference Result 24325 states and 108741 transitions. [2021-06-05 22:23:40,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:23:40,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 30 [2021-06-05 22:23:40,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:40,202 INFO L225 Difference]: With dead ends: 24325 [2021-06-05 22:23:40,202 INFO L226 Difference]: Without dead ends: 24325 [2021-06-05 22:23:40,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:23:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24325 states. [2021-06-05 22:23:40,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24325 to 21261. [2021-06-05 22:23:40,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21261 states, 21260 states have (on average 4.549952963311383) internal successors, (96732), 21260 states have internal predecessors, (96732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21261 states to 21261 states and 96732 transitions. [2021-06-05 22:23:40,733 INFO L78 Accepts]: Start accepts. Automaton has 21261 states and 96732 transitions. Word has length 30 [2021-06-05 22:23:40,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:40,733 INFO L482 AbstractCegarLoop]: Abstraction has 21261 states and 96732 transitions. [2021-06-05 22:23:40,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 22:23:40,733 INFO L276 IsEmpty]: Start isEmpty. Operand 21261 states and 96732 transitions. [2021-06-05 22:23:40,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:23:40,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:40,773 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:40,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 22:23:40,773 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:40,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:40,774 INFO L82 PathProgramCache]: Analyzing trace with hash -535896376, now seen corresponding path program 3 times [2021-06-05 22:23:40,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:40,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180501858] [2021-06-05 22:23:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:40,838 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 22:23:40,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:40,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180501858] [2021-06-05 22:23:40,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180501858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:40,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955793483] [2021-06-05 22:23:40,838 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 22:23:40,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:23:40,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:40,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:23:40,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:41,213 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-06-05 22:23:41,236 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 22:23:41,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955793483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:41,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:41,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-06-05 22:23:41,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158593621] [2021-06-05 22:23:41,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:23:41,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:41,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:23:41,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:23:41,238 INFO L87 Difference]: Start difference. First operand 21261 states and 96732 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:42,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:42,346 INFO L93 Difference]: Finished difference Result 67384 states and 295897 transitions. [2021-06-05 22:23:42,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:23:42,347 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:23:42,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:42,442 INFO L225 Difference]: With dead ends: 67384 [2021-06-05 22:23:42,443 INFO L226 Difference]: Without dead ends: 35063 [2021-06-05 22:23:42,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=427, Invalid=1465, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:23:42,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35063 states. [2021-06-05 22:23:43,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35063 to 19352. [2021-06-05 22:23:43,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19352 states, 19351 states have (on average 4.504315022479458) internal successors, (87163), 19351 states have internal predecessors, (87163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:43,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19352 states to 19352 states and 87163 transitions. [2021-06-05 22:23:43,263 INFO L78 Accepts]: Start accepts. Automaton has 19352 states and 87163 transitions. Word has length 30 [2021-06-05 22:23:43,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:43,263 INFO L482 AbstractCegarLoop]: Abstraction has 19352 states and 87163 transitions. [2021-06-05 22:23:43,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:43,264 INFO L276 IsEmpty]: Start isEmpty. Operand 19352 states and 87163 transitions. [2021-06-05 22:23:43,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:23:43,300 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:43,300 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:43,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:43,501 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:43,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:43,501 INFO L82 PathProgramCache]: Analyzing trace with hash -372569844, now seen corresponding path program 3 times [2021-06-05 22:23:43,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:43,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9950227] [2021-06-05 22:23:43,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:43,520 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 22:23:43,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:43,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9950227] [2021-06-05 22:23:43,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9950227] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:23:43,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:23:43,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:23:43,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189537885] [2021-06-05 22:23:43,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:23:43,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:43,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:23:43,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:23:43,522 INFO L87 Difference]: Start difference. First operand 19352 states and 87163 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 22:23:43,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:43,659 INFO L93 Difference]: Finished difference Result 20461 states and 91087 transitions. [2021-06-05 22:23:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:23:43,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 30 [2021-06-05 22:23:43,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:43,708 INFO L225 Difference]: With dead ends: 20461 [2021-06-05 22:23:43,708 INFO L226 Difference]: Without dead ends: 19957 [2021-06-05 22:23:43,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:23:43,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19957 states. [2021-06-05 22:23:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19957 to 18072. [2021-06-05 22:23:44,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18072 states, 18071 states have (on average 4.485086602844336) internal successors, (81050), 18071 states have internal predecessors, (81050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18072 states to 18072 states and 81050 transitions. [2021-06-05 22:23:44,290 INFO L78 Accepts]: Start accepts. Automaton has 18072 states and 81050 transitions. Word has length 30 [2021-06-05 22:23:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:44,290 INFO L482 AbstractCegarLoop]: Abstraction has 18072 states and 81050 transitions. [2021-06-05 22:23:44,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 22:23:44,290 INFO L276 IsEmpty]: Start isEmpty. Operand 18072 states and 81050 transitions. [2021-06-05 22:23:44,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:23:44,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:44,328 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:44,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 22:23:44,328 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:44,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:44,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1477081055, now seen corresponding path program 2 times [2021-06-05 22:23:44,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:44,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826376918] [2021-06-05 22:23:44,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:44,366 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 22:23:44,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:44,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826376918] [2021-06-05 22:23:44,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826376918] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:23:44,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:23:44,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:23:44,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609953639] [2021-06-05 22:23:44,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:23:44,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:44,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:23:44,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:23:44,368 INFO L87 Difference]: Start difference. First operand 18072 states and 81050 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 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 22:23:44,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:44,540 INFO L93 Difference]: Finished difference Result 21232 states and 93393 transitions. [2021-06-05 22:23:44,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:23:44,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 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 30 [2021-06-05 22:23:44,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:44,593 INFO L225 Difference]: With dead ends: 21232 [2021-06-05 22:23:44,593 INFO L226 Difference]: Without dead ends: 20403 [2021-06-05 22:23:44,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:23:44,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20403 states. [2021-06-05 22:23:45,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20403 to 18470. [2021-06-05 22:23:45,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18470 states, 18469 states have (on average 4.4772321186853645) internal successors, (82690), 18469 states have internal predecessors, (82690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:45,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18470 states to 18470 states and 82690 transitions. [2021-06-05 22:23:45,247 INFO L78 Accepts]: Start accepts. Automaton has 18470 states and 82690 transitions. Word has length 30 [2021-06-05 22:23:45,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:45,247 INFO L482 AbstractCegarLoop]: Abstraction has 18470 states and 82690 transitions. [2021-06-05 22:23:45,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 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 22:23:45,247 INFO L276 IsEmpty]: Start isEmpty. Operand 18470 states and 82690 transitions. [2021-06-05 22:23:45,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:23:45,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:45,282 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:45,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 22:23:45,283 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:45,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:45,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1538169193, now seen corresponding path program 3 times [2021-06-05 22:23:45,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:45,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476816324] [2021-06-05 22:23:45,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:45,336 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 22:23:45,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:45,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476816324] [2021-06-05 22:23:45,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476816324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:45,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296941177] [2021-06-05 22:23:45,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:23:45,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:23:45,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:45,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 22:23:45,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:45,436 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 22:23:45,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296941177] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:23:45,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:23:45,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-06-05 22:23:45,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108618110] [2021-06-05 22:23:45,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:23:45,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:45,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:23:45,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:23:45,437 INFO L87 Difference]: Start difference. First operand 18470 states and 82690 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 22:23:45,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:45,580 INFO L93 Difference]: Finished difference Result 19318 states and 85766 transitions. [2021-06-05 22:23:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:23:45,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 30 [2021-06-05 22:23:45,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:45,631 INFO L225 Difference]: With dead ends: 19318 [2021-06-05 22:23:45,632 INFO L226 Difference]: Without dead ends: 18640 [2021-06-05 22:23:45,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:23:45,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18640 states. [2021-06-05 22:23:45,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18640 to 13099. [2021-06-05 22:23:45,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13099 states, 13098 states have (on average 4.455183997556879) internal successors, (58354), 13098 states have internal predecessors, (58354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13099 states to 13099 states and 58354 transitions. [2021-06-05 22:23:46,265 INFO L78 Accepts]: Start accepts. Automaton has 13099 states and 58354 transitions. Word has length 30 [2021-06-05 22:23:46,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:46,265 INFO L482 AbstractCegarLoop]: Abstraction has 13099 states and 58354 transitions. [2021-06-05 22:23:46,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 22:23:46,265 INFO L276 IsEmpty]: Start isEmpty. Operand 13099 states and 58354 transitions. [2021-06-05 22:23:46,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:23:46,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:46,309 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:46,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 22:23:46,512 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:46,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:46,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2116118737, now seen corresponding path program 1 times [2021-06-05 22:23:46,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:46,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200346742] [2021-06-05 22:23:46,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:46,578 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 22:23:46,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:46,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200346742] [2021-06-05 22:23:46,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200346742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:46,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418896232] [2021-06-05 22:23:46,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:23:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:46,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 22:23:46,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:46,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418896232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:46,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:46,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-06-05 22:23:46,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763770882] [2021-06-05 22:23:46,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:23:46,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:46,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:23:46,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:23:46,681 INFO L87 Difference]: Start difference. First operand 13099 states and 58354 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:47,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:47,399 INFO L93 Difference]: Finished difference Result 43919 states and 200632 transitions. [2021-06-05 22:23:47,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:23:47,400 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 22:23:47,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:47,466 INFO L225 Difference]: With dead ends: 43919 [2021-06-05 22:23:47,466 INFO L226 Difference]: Without dead ends: 24373 [2021-06-05 22:23:47,467 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:23:47,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24373 states. [2021-06-05 22:23:47,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24373 to 9122. [2021-06-05 22:23:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9122 states, 9121 states have (on average 4.517816028944194) internal successors, (41207), 9121 states have internal predecessors, (41207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9122 states to 9122 states and 41207 transitions. [2021-06-05 22:23:48,048 INFO L78 Accepts]: Start accepts. Automaton has 9122 states and 41207 transitions. Word has length 33 [2021-06-05 22:23:48,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:48,048 INFO L482 AbstractCegarLoop]: Abstraction has 9122 states and 41207 transitions. [2021-06-05 22:23:48,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:48,048 INFO L276 IsEmpty]: Start isEmpty. Operand 9122 states and 41207 transitions. [2021-06-05 22:23:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 22:23:48,069 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:48,069 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:48,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:48,285 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:48,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:48,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2025680541, now seen corresponding path program 1 times [2021-06-05 22:23:48,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:48,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540539464] [2021-06-05 22:23:48,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:48,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:48,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540539464] [2021-06-05 22:23:48,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540539464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:48,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237390517] [2021-06-05 22:23:48,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:48,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 22:23:48,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:23:48,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237390517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:48,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:48,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-06-05 22:23:48,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526160357] [2021-06-05 22:23:48,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:23:48,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:48,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:23:48,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:23:48,508 INFO L87 Difference]: Start difference. First operand 9122 states and 41207 transitions. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:49,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:49,743 INFO L93 Difference]: Finished difference Result 33369 states and 153422 transitions. [2021-06-05 22:23:49,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 22:23:49,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 22:23:49,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:49,808 INFO L225 Difference]: With dead ends: 33369 [2021-06-05 22:23:49,808 INFO L226 Difference]: Without dead ends: 23102 [2021-06-05 22:23:49,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 629.6ms TimeCoverageRelationStatistics Valid=661, Invalid=2531, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:23:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23102 states. [2021-06-05 22:23:50,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23102 to 9972. [2021-06-05 22:23:50,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9972 states, 9971 states have (on average 4.515595226155852) internal successors, (45025), 9971 states have internal predecessors, (45025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:50,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9972 states to 9972 states and 45025 transitions. [2021-06-05 22:23:50,300 INFO L78 Accepts]: Start accepts. Automaton has 9972 states and 45025 transitions. Word has length 36 [2021-06-05 22:23:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:50,301 INFO L482 AbstractCegarLoop]: Abstraction has 9972 states and 45025 transitions. [2021-06-05 22:23:50,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:50,301 INFO L276 IsEmpty]: Start isEmpty. Operand 9972 states and 45025 transitions. [2021-06-05 22:23:50,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 22:23:50,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:50,318 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:50,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 22:23:50,519 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:50,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:50,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2081351631, now seen corresponding path program 1 times [2021-06-05 22:23:50,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:50,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160772129] [2021-06-05 22:23:50,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:23:50,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:50,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160772129] [2021-06-05 22:23:50,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160772129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:50,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155301316] [2021-06-05 22:23:50,659 INFO L95 rtionOrderModulation]: Keeping assertion order 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 22:23:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:50,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:23:50,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:50,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-06-05 22:23:50,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:50,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:50,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:50,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2021-06-05 22:23:50,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:23:50,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:50,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:50,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:50,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-05 22:23:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:23:50,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155301316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:50,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:50,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 22:23:50,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531381949] [2021-06-05 22:23:50,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:23:50,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:50,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:23:50,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:23:50,865 INFO L87 Difference]: Start difference. First operand 9972 states and 45025 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:51,233 INFO L93 Difference]: Finished difference Result 34805 states and 160319 transitions. [2021-06-05 22:23:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:23:51,233 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 22:23:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:51,300 INFO L225 Difference]: With dead ends: 34805 [2021-06-05 22:23:51,300 INFO L226 Difference]: Without dead ends: 24590 [2021-06-05 22:23:51,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:23:51,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24590 states. [2021-06-05 22:23:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24590 to 9804. [2021-06-05 22:23:51,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9804 states, 9803 states have (on average 4.534428236254208) internal successors, (44451), 9803 states have internal predecessors, (44451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9804 states to 9804 states and 44451 transitions. [2021-06-05 22:23:51,800 INFO L78 Accepts]: Start accepts. Automaton has 9804 states and 44451 transitions. Word has length 39 [2021-06-05 22:23:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:51,800 INFO L482 AbstractCegarLoop]: Abstraction has 9804 states and 44451 transitions. [2021-06-05 22:23:51,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 9804 states and 44451 transitions. [2021-06-05 22:23:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 22:23:51,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:51,823 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:52,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 22:23:52,037 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:52,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:52,037 INFO L82 PathProgramCache]: Analyzing trace with hash 338294799, now seen corresponding path program 2 times [2021-06-05 22:23:52,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:52,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446656950] [2021-06-05 22:23:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:23:52,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:52,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446656950] [2021-06-05 22:23:52,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446656950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:52,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358108684] [2021-06-05 22:23:52,206 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 22:23:52,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:23:52,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:52,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:23:52,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:52,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:23:52,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:52,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:52,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:52,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 22:23:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:23:52,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358108684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:52,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:52,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:23:52,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677631326] [2021-06-05 22:23:52,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:23:52,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:52,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:23:52,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:23:52,379 INFO L87 Difference]: Start difference. First operand 9804 states and 44451 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:52,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:52,837 INFO L93 Difference]: Finished difference Result 32096 states and 147329 transitions. [2021-06-05 22:23:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:23:52,837 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 22:23:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:52,880 INFO L225 Difference]: With dead ends: 32096 [2021-06-05 22:23:52,880 INFO L226 Difference]: Without dead ends: 16159 [2021-06-05 22:23:52,881 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 198.9ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:52,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16159 states. [2021-06-05 22:23:53,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16159 to 9966. [2021-06-05 22:23:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9966 states, 9965 states have (on average 4.493828399397892) internal successors, (44781), 9965 states have internal predecessors, (44781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:53,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9966 states to 9966 states and 44781 transitions. [2021-06-05 22:23:53,155 INFO L78 Accepts]: Start accepts. Automaton has 9966 states and 44781 transitions. Word has length 39 [2021-06-05 22:23:53,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:53,156 INFO L482 AbstractCegarLoop]: Abstraction has 9966 states and 44781 transitions. [2021-06-05 22:23:53,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:53,156 INFO L276 IsEmpty]: Start isEmpty. Operand 9966 states and 44781 transitions. [2021-06-05 22:23:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 22:23:53,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:53,174 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:53,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:53,374 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:53,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:53,375 INFO L82 PathProgramCache]: Analyzing trace with hash -806098199, now seen corresponding path program 3 times [2021-06-05 22:23:53,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:53,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898107015] [2021-06-05 22:23:53,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:23:53,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:53,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898107015] [2021-06-05 22:23:53,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898107015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:53,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125013716] [2021-06-05 22:23:53,489 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 22:23:53,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:23:53,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:53,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:23:53,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:53,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:23:53,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:53,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:53,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:53,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 22:23:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:23:53,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125013716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:53,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:53,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:23:53,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245816724] [2021-06-05 22:23:53,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:23:53,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:53,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:23:53,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:23:53,664 INFO L87 Difference]: Start difference. First operand 9966 states and 44781 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:54,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:54,475 INFO L93 Difference]: Finished difference Result 38248 states and 176153 transitions. [2021-06-05 22:23:54,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:23:54,476 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 22:23:54,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:54,526 INFO L225 Difference]: With dead ends: 38248 [2021-06-05 22:23:54,526 INFO L226 Difference]: Without dead ends: 19645 [2021-06-05 22:23:54,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 291.6ms TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:23:54,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19645 states. [2021-06-05 22:23:54,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19645 to 10785. [2021-06-05 22:23:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10785 states, 10784 states have (on average 4.496012611275964) internal successors, (48485), 10784 states have internal predecessors, (48485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10785 states to 10785 states and 48485 transitions. [2021-06-05 22:23:54,799 INFO L78 Accepts]: Start accepts. Automaton has 10785 states and 48485 transitions. Word has length 39 [2021-06-05 22:23:54,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:54,799 INFO L482 AbstractCegarLoop]: Abstraction has 10785 states and 48485 transitions. [2021-06-05 22:23:54,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:54,799 INFO L276 IsEmpty]: Start isEmpty. Operand 10785 states and 48485 transitions. [2021-06-05 22:23:54,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 22:23:54,817 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:54,817 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:55,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:55,018 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:55,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:55,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1743444361, now seen corresponding path program 4 times [2021-06-05 22:23:55,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:55,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985245810] [2021-06-05 22:23:55,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:55,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:55,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985245810] [2021-06-05 22:23:55,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985245810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:55,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044378375] [2021-06-05 22:23:55,160 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 22:23:55,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:23:55,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:55,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:23:55,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:55,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-06-05 22:23:55,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:55,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:55,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:55,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-06-05 22:23:55,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2021-06-05 22:23:55,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:55,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:55,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:55,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:9 [2021-06-05 22:23:55,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:23:55,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:55,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:55,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:55,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 22:23:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:55,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044378375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:55,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:55,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:23:55,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115142671] [2021-06-05 22:23:55,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:23:55,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:55,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:23:55,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:23:55,344 INFO L87 Difference]: Start difference. First operand 10785 states and 48485 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:55,945 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 22:23:56,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:56,353 INFO L93 Difference]: Finished difference Result 29883 states and 135356 transitions. [2021-06-05 22:23:56,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:23:56,354 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 22:23:56,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:56,401 INFO L225 Difference]: With dead ends: 29883 [2021-06-05 22:23:56,401 INFO L226 Difference]: Without dead ends: 17348 [2021-06-05 22:23:56,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 595.1ms TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:23:56,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17348 states. [2021-06-05 22:23:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17348 to 11030. [2021-06-05 22:23:56,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11030 states, 11029 states have (on average 4.473569679934718) internal successors, (49339), 11029 states have internal predecessors, (49339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:56,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11030 states to 11030 states and 49339 transitions. [2021-06-05 22:23:56,663 INFO L78 Accepts]: Start accepts. Automaton has 11030 states and 49339 transitions. Word has length 39 [2021-06-05 22:23:56,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:56,663 INFO L482 AbstractCegarLoop]: Abstraction has 11030 states and 49339 transitions. [2021-06-05 22:23:56,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:56,663 INFO L276 IsEmpty]: Start isEmpty. Operand 11030 states and 49339 transitions. [2021-06-05 22:23:56,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 22:23:56,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:56,684 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:56,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 22:23:56,885 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:56,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:56,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1377639985, now seen corresponding path program 5 times [2021-06-05 22:23:56,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:56,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223062229] [2021-06-05 22:23:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:57,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:57,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223062229] [2021-06-05 22:23:57,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223062229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:57,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324335439] [2021-06-05 22:23:57,014 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 22:23:57,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:23:57,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:57,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:23:57,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:57,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-06-05 22:23:57,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:57,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:57,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:57,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-06-05 22:23:57,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:23:57,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:57,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:57,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:57,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-05 22:23:57,250 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 22:23:57,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324335439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:57,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:57,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 22:23:57,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508782505] [2021-06-05 22:23:57,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:23:57,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:57,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:23:57,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:23:57,252 INFO L87 Difference]: Start difference. First operand 11030 states and 49339 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:58,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:58,463 INFO L93 Difference]: Finished difference Result 37384 states and 169706 transitions. [2021-06-05 22:23:58,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:23:58,463 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 22:23:58,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:58,523 INFO L225 Difference]: With dead ends: 37384 [2021-06-05 22:23:58,523 INFO L226 Difference]: Without dead ends: 20919 [2021-06-05 22:23:58,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 798.3ms TimeCoverageRelationStatistics Valid=594, Invalid=1568, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:23:58,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20919 states. [2021-06-05 22:23:58,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20919 to 11315. [2021-06-05 22:23:58,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11315 states, 11314 states have (on average 4.472246773908432) internal successors, (50599), 11314 states have internal predecessors, (50599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:58,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11315 states to 11315 states and 50599 transitions. [2021-06-05 22:23:58,810 INFO L78 Accepts]: Start accepts. Automaton has 11315 states and 50599 transitions. Word has length 39 [2021-06-05 22:23:58,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:58,810 INFO L482 AbstractCegarLoop]: Abstraction has 11315 states and 50599 transitions. [2021-06-05 22:23:58,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:58,810 INFO L276 IsEmpty]: Start isEmpty. Operand 11315 states and 50599 transitions. [2021-06-05 22:23:58,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 22:23:58,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:58,829 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:59,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:59,029 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:23:59,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:59,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1173646258, now seen corresponding path program 6 times [2021-06-05 22:23:59,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:59,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460871598] [2021-06-05 22:23:59,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:23:59,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:59,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460871598] [2021-06-05 22:23:59,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460871598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:59,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795609948] [2021-06-05 22:23:59,056 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 22:23:59,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:23:59,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:59,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:23:59,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:23:59,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795609948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:59,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:59,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 22:23:59,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96780647] [2021-06-05 22:23:59,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:23:59,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:59,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:23:59,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:23:59,197 INFO L87 Difference]: Start difference. First operand 11315 states and 50599 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:59,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:59,995 INFO L93 Difference]: Finished difference Result 38369 states and 174934 transitions. [2021-06-05 22:23:59,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:23:59,996 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 22:23:59,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:00,124 INFO L225 Difference]: With dead ends: 38369 [2021-06-05 22:24:00,125 INFO L226 Difference]: Without dead ends: 38168 [2021-06-05 22:24:00,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:24:00,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38168 states. [2021-06-05 22:24:00,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38168 to 27191. [2021-06-05 22:24:00,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27191 states, 27190 states have (on average 4.6368517837440235) internal successors, (126076), 27190 states have internal predecessors, (126076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27191 states to 27191 states and 126076 transitions. [2021-06-05 22:24:01,128 INFO L78 Accepts]: Start accepts. Automaton has 27191 states and 126076 transitions. Word has length 42 [2021-06-05 22:24:01,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:01,129 INFO L482 AbstractCegarLoop]: Abstraction has 27191 states and 126076 transitions. [2021-06-05 22:24:01,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:01,130 INFO L276 IsEmpty]: Start isEmpty. Operand 27191 states and 126076 transitions. [2021-06-05 22:24:01,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 22:24:01,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:01,193 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:01,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 22:24:01,394 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:24:01,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:01,394 INFO L82 PathProgramCache]: Analyzing trace with hash 389104470, now seen corresponding path program 7 times [2021-06-05 22:24:01,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:01,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893861095] [2021-06-05 22:24:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:01,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:01,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893861095] [2021-06-05 22:24:01,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893861095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:01,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777024137] [2021-06-05 22:24:01,420 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 22:24:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:01,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 22:24:01,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:24:01,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777024137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:01,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:01,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 22:24:01,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634637801] [2021-06-05 22:24:01,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:24:01,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:01,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:24:01,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:24:01,525 INFO L87 Difference]: Start difference. First operand 27191 states and 126076 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:01,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:01,907 INFO L93 Difference]: Finished difference Result 51293 states and 237263 transitions. [2021-06-05 22:24:01,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:24:01,907 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 22:24:01,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:02,066 INFO L225 Difference]: With dead ends: 51293 [2021-06-05 22:24:02,066 INFO L226 Difference]: Without dead ends: 51193 [2021-06-05 22:24:02,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:24:02,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51193 states. [2021-06-05 22:24:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51193 to 32278. [2021-06-05 22:24:03,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32278 states, 32277 states have (on average 4.725191312699446) internal successors, (152515), 32277 states have internal predecessors, (152515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:03,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32278 states to 32278 states and 152515 transitions. [2021-06-05 22:24:03,301 INFO L78 Accepts]: Start accepts. Automaton has 32278 states and 152515 transitions. Word has length 42 [2021-06-05 22:24:03,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:03,301 INFO L482 AbstractCegarLoop]: Abstraction has 32278 states and 152515 transitions. [2021-06-05 22:24:03,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:03,301 INFO L276 IsEmpty]: Start isEmpty. Operand 32278 states and 152515 transitions. [2021-06-05 22:24:03,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 22:24:03,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:03,366 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:03,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:03,567 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:24:03,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:03,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1709365898, now seen corresponding path program 8 times [2021-06-05 22:24:03,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:03,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731165322] [2021-06-05 22:24:03,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:03,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:03,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731165322] [2021-06-05 22:24:03,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731165322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:03,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932082751] [2021-06-05 22:24:03,593 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 22:24:03,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:24:03,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:03,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 22:24:03,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:03,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932082751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:03,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:03,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 22:24:03,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877569901] [2021-06-05 22:24:03,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:24:03,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:03,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:24:03,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:24:03,699 INFO L87 Difference]: Start difference. First operand 32278 states and 152515 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:04,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:04,372 INFO L93 Difference]: Finished difference Result 48003 states and 221808 transitions. [2021-06-05 22:24:04,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:24:04,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 22:24:04,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:04,529 INFO L225 Difference]: With dead ends: 48003 [2021-06-05 22:24:04,529 INFO L226 Difference]: Without dead ends: 48003 [2021-06-05 22:24:04,529 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:24:04,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48003 states. [2021-06-05 22:24:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48003 to 31277. [2021-06-05 22:24:05,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31277 states, 31276 states have (on average 4.717930681672848) internal successors, (147558), 31276 states have internal predecessors, (147558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31277 states to 31277 states and 147558 transitions. [2021-06-05 22:24:05,789 INFO L78 Accepts]: Start accepts. Automaton has 31277 states and 147558 transitions. Word has length 42 [2021-06-05 22:24:05,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:05,789 INFO L482 AbstractCegarLoop]: Abstraction has 31277 states and 147558 transitions. [2021-06-05 22:24:05,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:05,789 INFO L276 IsEmpty]: Start isEmpty. Operand 31277 states and 147558 transitions. [2021-06-05 22:24:05,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 22:24:05,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:05,852 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:06,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 22:24:06,053 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:24:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:06,053 INFO L82 PathProgramCache]: Analyzing trace with hash 31127056, now seen corresponding path program 9 times [2021-06-05 22:24:06,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:06,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994461801] [2021-06-05 22:24:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:06,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:06,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994461801] [2021-06-05 22:24:06,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994461801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:06,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844459425] [2021-06-05 22:24:06,081 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 22:24:06,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:24:06,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:06,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 22:24:06,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:06,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844459425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:06,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:06,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 22:24:06,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43860473] [2021-06-05 22:24:06,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:24:06,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:06,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:24:06,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:24:06,195 INFO L87 Difference]: Start difference. First operand 31277 states and 147558 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:06,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:06,587 INFO L93 Difference]: Finished difference Result 59008 states and 276119 transitions. [2021-06-05 22:24:06,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:24:06,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 22:24:06,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:06,782 INFO L225 Difference]: With dead ends: 59008 [2021-06-05 22:24:06,782 INFO L226 Difference]: Without dead ends: 59008 [2021-06-05 22:24:06,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:24:06,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59008 states. [2021-06-05 22:24:08,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59008 to 42789. [2021-06-05 22:24:08,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42789 states, 42788 states have (on average 4.78961391044218) internal successors, (204938), 42788 states have internal predecessors, (204938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42789 states to 42789 states and 204938 transitions. [2021-06-05 22:24:08,704 INFO L78 Accepts]: Start accepts. Automaton has 42789 states and 204938 transitions. Word has length 42 [2021-06-05 22:24:08,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:08,704 INFO L482 AbstractCegarLoop]: Abstraction has 42789 states and 204938 transitions. [2021-06-05 22:24:08,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:08,704 INFO L276 IsEmpty]: Start isEmpty. Operand 42789 states and 204938 transitions. [2021-06-05 22:24:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 22:24:08,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:08,795 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:08,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 22:24:08,997 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:24:08,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:08,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1577231536, now seen corresponding path program 10 times [2021-06-05 22:24:08,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:08,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229485846] [2021-06-05 22:24:08,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:09,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:09,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229485846] [2021-06-05 22:24:09,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229485846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:09,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656868297] [2021-06-05 22:24:09,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:24:09,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:24:09,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:09,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 22:24:09,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:24:09,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656868297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:09,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:09,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 22:24:09,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176493344] [2021-06-05 22:24:09,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:24:09,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:09,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:24:09,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:24:09,129 INFO L87 Difference]: Start difference. First operand 42789 states and 204938 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:09,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:09,462 INFO L93 Difference]: Finished difference Result 49547 states and 233319 transitions. [2021-06-05 22:24:09,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:24:09,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 22:24:09,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:09,627 INFO L225 Difference]: With dead ends: 49547 [2021-06-05 22:24:09,627 INFO L226 Difference]: Without dead ends: 49492 [2021-06-05 22:24:09,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:24:09,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49492 states. [2021-06-05 22:24:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49492 to 42675. [2021-06-05 22:24:10,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42675 states, 42674 states have (on average 4.792590336035993) internal successors, (204519), 42674 states have internal predecessors, (204519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:11,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42675 states to 42675 states and 204519 transitions. [2021-06-05 22:24:11,066 INFO L78 Accepts]: Start accepts. Automaton has 42675 states and 204519 transitions. Word has length 42 [2021-06-05 22:24:11,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:11,066 INFO L482 AbstractCegarLoop]: Abstraction has 42675 states and 204519 transitions. [2021-06-05 22:24:11,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 42675 states and 204519 transitions. [2021-06-05 22:24:11,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 22:24:11,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:11,153 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:11,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 22:24:11,359 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:24:11,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:11,360 INFO L82 PathProgramCache]: Analyzing trace with hash -241142803, now seen corresponding path program 11 times [2021-06-05 22:24:11,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:11,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561955680] [2021-06-05 22:24:11,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:11,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:11,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561955680] [2021-06-05 22:24:11,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561955680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:11,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044268904] [2021-06-05 22:24:11,398 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 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 22:24:11,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:24:11,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:11,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 22:24:11,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:24:11,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044268904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:11,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:11,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 22:24:11,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251437489] [2021-06-05 22:24:11,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:24:11,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:11,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:24:11,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:24:11,521 INFO L87 Difference]: Start difference. First operand 42675 states and 204519 transitions. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:12,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:12,682 INFO L93 Difference]: Finished difference Result 86712 states and 419227 transitions. [2021-06-05 22:24:12,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:24:12,682 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 22:24:12,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:12,963 INFO L225 Difference]: With dead ends: 86712 [2021-06-05 22:24:12,963 INFO L226 Difference]: Without dead ends: 85513 [2021-06-05 22:24:12,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 160.2ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:24:13,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85513 states. [2021-06-05 22:24:15,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85513 to 68374. [2021-06-05 22:24:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68374 states, 68373 states have (on average 4.912158308104076) internal successors, (335859), 68373 states have internal predecessors, (335859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:15,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68374 states to 68374 states and 335859 transitions. [2021-06-05 22:24:15,362 INFO L78 Accepts]: Start accepts. Automaton has 68374 states and 335859 transitions. Word has length 42 [2021-06-05 22:24:15,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:15,362 INFO L482 AbstractCegarLoop]: Abstraction has 68374 states and 335859 transitions. [2021-06-05 22:24:15,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:15,362 INFO L276 IsEmpty]: Start isEmpty. Operand 68374 states and 335859 transitions. [2021-06-05 22:24:15,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 22:24:15,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:15,522 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:15,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 22:24:15,724 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:24:15,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:15,724 INFO L82 PathProgramCache]: Analyzing trace with hash -2044211746, now seen corresponding path program 12 times [2021-06-05 22:24:15,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:15,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007217116] [2021-06-05 22:24:15,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:24:15,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:15,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007217116] [2021-06-05 22:24:15,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007217116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:15,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408757016] [2021-06-05 22:24:15,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:24:15,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:24:15,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:15,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 22:24:15,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:24:15,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408757016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:15,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:15,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 22:24:15,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135563866] [2021-06-05 22:24:15,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:24:15,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:15,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:24:15,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:24:15,877 INFO L87 Difference]: Start difference. First operand 68374 states and 335859 transitions. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:18,899 INFO L93 Difference]: Finished difference Result 206654 states and 1010518 transitions. [2021-06-05 22:24:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:24:18,900 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 22:24:18,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:19,832 INFO L225 Difference]: With dead ends: 206654 [2021-06-05 22:24:19,832 INFO L226 Difference]: Without dead ends: 206654 [2021-06-05 22:24:19,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=286, Invalid=974, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:24:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206654 states. [2021-06-05 22:24:24,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206654 to 149917. [2021-06-05 22:24:24,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149917 states, 149916 states have (on average 5.023439792950719) internal successors, (753094), 149916 states have internal predecessors, (753094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:25,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149917 states to 149917 states and 753094 transitions. [2021-06-05 22:24:25,989 INFO L78 Accepts]: Start accepts. Automaton has 149917 states and 753094 transitions. Word has length 45 [2021-06-05 22:24:25,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:25,989 INFO L482 AbstractCegarLoop]: Abstraction has 149917 states and 753094 transitions. [2021-06-05 22:24:25,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:25,989 INFO L276 IsEmpty]: Start isEmpty. Operand 149917 states and 753094 transitions. [2021-06-05 22:24:26,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 22:24:26,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:26,428 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:26,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:26,629 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:24:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1709886164, now seen corresponding path program 13 times [2021-06-05 22:24:26,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:26,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969519411] [2021-06-05 22:24:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:24:26,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:26,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969519411] [2021-06-05 22:24:26,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969519411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:26,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931456607] [2021-06-05 22:24:26,656 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 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 22:24:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:26,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:24:26,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:26,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931456607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:26,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:26,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 22:24:26,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818023138] [2021-06-05 22:24:26,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:24:26,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:26,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:24:26,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:24:26,776 INFO L87 Difference]: Start difference. First operand 149917 states and 753094 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:34,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:34,417 INFO L93 Difference]: Finished difference Result 623344 states and 3160632 transitions. [2021-06-05 22:24:34,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:24:34,417 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 22:24:34,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:39,567 INFO L225 Difference]: With dead ends: 623344 [2021-06-05 22:24:39,567 INFO L226 Difference]: Without dead ends: 606012 [2021-06-05 22:24:39,568 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 270.6ms TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:24:40,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606012 states. [2021-06-05 22:24:56,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606012 to 382514. [2021-06-05 22:24:57,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382514 states, 382513 states have (on average 5.261230337269583) internal successors, (2012489), 382513 states have internal predecessors, (2012489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382514 states to 382514 states and 2012489 transitions. [2021-06-05 22:25:03,510 INFO L78 Accepts]: Start accepts. Automaton has 382514 states and 2012489 transitions. Word has length 45 [2021-06-05 22:25:03,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:03,510 INFO L482 AbstractCegarLoop]: Abstraction has 382514 states and 2012489 transitions. [2021-06-05 22:25:03,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 382514 states and 2012489 transitions. [2021-06-05 22:25:07,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 22:25:07,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:07,091 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:07,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 22:25:07,314 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:25:07,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:07,315 INFO L82 PathProgramCache]: Analyzing trace with hash 215952031, now seen corresponding path program 14 times [2021-06-05 22:25:07,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:07,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365228636] [2021-06-05 22:25:07,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:25:07,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:07,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365228636] [2021-06-05 22:25:07,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365228636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:07,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977140662] [2021-06-05 22:25:07,372 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 22:25:07,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:25:07,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:07,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:25:07,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:25:07,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977140662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:07,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:07,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 22:25:07,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510038323] [2021-06-05 22:25:07,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:25:07,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:07,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:25:07,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:25:07,503 INFO L87 Difference]: Start difference. First operand 382514 states and 2012489 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:21,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:21,392 INFO L93 Difference]: Finished difference Result 1109278 states and 5748198 transitions. [2021-06-05 22:25:21,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:25:21,392 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 22:25:21,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:36,790 INFO L225 Difference]: With dead ends: 1109278 [2021-06-05 22:25:36,790 INFO L226 Difference]: Without dead ends: 1078612 [2021-06-05 22:25:36,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:25:40,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078612 states. [2021-06-05 22:26:14,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078612 to 855843. [2021-06-05 22:26:16,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855843 states, 855842 states have (on average 5.344619684474471) internal successors, (4574150), 855842 states have internal predecessors, (4574150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855843 states to 855843 states and 4574150 transitions. [2021-06-05 22:26:30,706 INFO L78 Accepts]: Start accepts. Automaton has 855843 states and 4574150 transitions. Word has length 45 [2021-06-05 22:26:30,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:30,706 INFO L482 AbstractCegarLoop]: Abstraction has 855843 states and 4574150 transitions. [2021-06-05 22:26:30,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 855843 states and 4574150 transitions.