/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-dev-29289db [2021-06-05 05:02:45,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:02:45,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:02:45,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:02:45,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 05:02:45,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 05:02:45,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 05:02:45,095 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 05:02:45,119 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:02:45,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:02:45,119 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:02:45,119 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:02:45,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:02:45,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:02:45,121 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:02:45,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:02:45,121 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:02:45,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:02:45,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:02:45,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:02:45,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:02:45,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:02:45,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:02:45,122 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:02:45,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:02:45,123 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:02:45,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:02:45,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:02:45,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:02:45,123 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:02:45,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:02:45,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:02:45,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:02:45,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:02:45,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:02:45,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:02:45,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:02:45,124 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:02:45,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:02:45,124 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:02:45,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:02:45,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:02:45,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:02:45,376 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:02:45,377 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:02:45,378 INFO L432 ainManager$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 05:02:45,378 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 05:02:45,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:02:45,411 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:02:45,412 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:02:45,412 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:02:45,412 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:02:45,420 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 05:02:45" (1/1) ... [2021-06-05 05:02:45,425 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 05:02:45" (1/1) ... [2021-06-05 05:02:45,430 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:02:45,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:02:45,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:02:45,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:02:45,437 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 05:02:45" (1/1) ... [2021-06-05 05:02:45,437 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 05:02:45" (1/1) ... [2021-06-05 05:02:45,438 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 05:02:45" (1/1) ... [2021-06-05 05:02:45,438 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 05:02:45" (1/1) ... [2021-06-05 05:02:45,440 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 05:02:45" (1/1) ... [2021-06-05 05:02:45,442 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 05:02:45" (1/1) ... [2021-06-05 05:02:45,444 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 05:02:45" (1/1) ... [2021-06-05 05:02:45,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:02:45,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:02:45,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:02:45,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:02:45,446 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 05:02:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:02:45,498 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:02:45,498 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:02:45,499 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:02:45,499 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:02:45,499 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:02:45,499 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:02:45,500 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:02:45,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:02:45,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:02:45,500 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 05:02:45,501 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 05:02:45,501 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 05:02:45,501 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 05:02:45,501 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 05:02:45,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 05:02:45,502 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-05 05:02:45,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-05 05:02:45,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-05 05:02:45,503 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 05:02:45,662 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:02:45,662 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:02:45,663 INFO L202 PluginConnector]: Adding new model min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:02:45 BoogieIcfgContainer [2021-06-05 05:02:45,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:02:45,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:02:45,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:02:45,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:02:45,666 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 05:02:45" (1/2) ... [2021-06-05 05:02:45,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df64aca and model type min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:02:45, skipping insertion in model container [2021-06-05 05:02:45,667 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 05:02:45" (2/2) ... [2021-06-05 05:02:45,668 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-2.wvr.bpl [2021-06-05 05:02:45,671 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:02:45,671 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:02:45,671 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:02:45,672 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:02:45,736 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-06-05 05:02:45,749 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-05 05:02:45,761 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:02:45,761 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:02:45,761 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:02:45,761 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:02:45,761 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:02:45,761 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:02:45,761 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:02:45,761 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:02:45,767 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 46 transitions, 132 flow [2021-06-05 05:02:46,104 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 05:02:46,133 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 05:02:46,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:02:46,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:46,173 INFO L521 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 05:02:46,173 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 05:02:46,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:46,179 INFO L82 PathProgramCache]: Analyzing trace with hash -2007240255, now seen corresponding path program 1 times [2021-06-05 05:02:46,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:46,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6656298] [2021-06-05 05:02:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:46,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:46,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6656298] [2021-06-05 05:02:46,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6656298] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:02:46,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:02:46,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:02:46,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233986845] [2021-06-05 05:02:46,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:02:46,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:46,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:02:46,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:02:46,330 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 05:02:46,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:46,738 INFO L93 Difference]: Finished difference Result 23171 states and 106643 transitions. [2021-06-05 05:02:46,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:02:46,739 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 05:02:46,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:47,034 INFO L225 Difference]: With dead ends: 23171 [2021-06-05 05:02:47,034 INFO L226 Difference]: Without dead ends: 15763 [2021-06-05 05:02:47,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:02:47,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15763 states. [2021-06-05 05:02:47,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15763 to 7383. [2021-06-05 05:02:47,489 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 05:02:47,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7383 states to 7383 states and 34194 transitions. [2021-06-05 05:02:47,551 INFO L78 Accepts]: Start accepts. Automaton has 7383 states and 34194 transitions. Word has length 27 [2021-06-05 05:02:47,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:47,552 INFO L482 AbstractCegarLoop]: Abstraction has 7383 states and 34194 transitions. [2021-06-05 05:02:47,553 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 05:02:47,553 INFO L276 IsEmpty]: Start isEmpty. Operand 7383 states and 34194 transitions. [2021-06-05 05:02:47,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:02:47,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:47,575 INFO L521 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 05:02:47,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:02:47,576 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 05:02:47,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:47,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1823966019, now seen corresponding path program 2 times [2021-06-05 05:02:47,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:47,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37576702] [2021-06-05 05:02:47,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:47,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:47,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37576702] [2021-06-05 05:02:47,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37576702] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:02:47,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:02:47,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:02:47,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67294520] [2021-06-05 05:02:47,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:02:47,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:47,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:02:47,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:02:47,637 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 05:02:47,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:47,756 INFO L93 Difference]: Finished difference Result 9446 states and 43398 transitions. [2021-06-05 05:02:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:02:47,756 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 05:02:47,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:47,791 INFO L225 Difference]: With dead ends: 9446 [2021-06-05 05:02:47,791 INFO L226 Difference]: Without dead ends: 6583 [2021-06-05 05:02:47,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:02:47,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2021-06-05 05:02:48,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6583. [2021-06-05 05:02:48,016 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 05:02:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 30044 transitions. [2021-06-05 05:02:48,039 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 30044 transitions. Word has length 27 [2021-06-05 05:02:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:48,040 INFO L482 AbstractCegarLoop]: Abstraction has 6583 states and 30044 transitions. [2021-06-05 05:02:48,040 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 05:02:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 30044 transitions. [2021-06-05 05:02:48,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:02:48,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:48,058 INFO L521 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 05:02:48,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 05:02:48,058 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 05:02:48,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:48,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1516614145, now seen corresponding path program 3 times [2021-06-05 05:02:48,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:48,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852848622] [2021-06-05 05:02:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:48,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:48,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852848622] [2021-06-05 05:02:48,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852848622] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:02:48,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:02:48,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:02:48,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715674844] [2021-06-05 05:02:48,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:02:48,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:48,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:02:48,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:02:48,123 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 05:02:48,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:48,358 INFO L93 Difference]: Finished difference Result 22801 states and 103818 transitions. [2021-06-05 05:02:48,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:02:48,359 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 05:02:48,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:48,425 INFO L225 Difference]: With dead ends: 22801 [2021-06-05 05:02:48,425 INFO L226 Difference]: Without dead ends: 16593 [2021-06-05 05:02:48,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:02:48,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16593 states. [2021-06-05 05:02:48,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16593 to 6861. [2021-06-05 05:02:48,742 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 05:02:48,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6861 states to 6861 states and 31378 transitions. [2021-06-05 05:02:48,814 INFO L78 Accepts]: Start accepts. Automaton has 6861 states and 31378 transitions. Word has length 27 [2021-06-05 05:02:48,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:48,814 INFO L482 AbstractCegarLoop]: Abstraction has 6861 states and 31378 transitions. [2021-06-05 05:02:48,814 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 05:02:48,818 INFO L276 IsEmpty]: Start isEmpty. Operand 6861 states and 31378 transitions. [2021-06-05 05:02:48,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:02:48,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:48,841 INFO L521 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 05:02:48,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 05:02:48,842 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 05:02:48,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:48,842 INFO L82 PathProgramCache]: Analyzing trace with hash -926574681, now seen corresponding path program 4 times [2021-06-05 05:02:48,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:48,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294635614] [2021-06-05 05:02:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:48,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:48,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294635614] [2021-06-05 05:02:48,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294635614] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:02:48,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:02:48,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:02:48,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790975443] [2021-06-05 05:02:48,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:02:48,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:48,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:02:48,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:02:48,862 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 05:02:48,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:48,906 INFO L93 Difference]: Finished difference Result 8424 states and 38332 transitions. [2021-06-05 05:02:48,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:02:48,906 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 05:02:48,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:48,926 INFO L225 Difference]: With dead ends: 8424 [2021-06-05 05:02:48,926 INFO L226 Difference]: Without dead ends: 6361 [2021-06-05 05:02:48,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:02:48,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-06-05 05:02:49,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 6361. [2021-06-05 05:02:49,065 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 05:02:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6361 states to 6361 states and 28778 transitions. [2021-06-05 05:02:49,163 INFO L78 Accepts]: Start accepts. Automaton has 6361 states and 28778 transitions. Word has length 27 [2021-06-05 05:02:49,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:49,164 INFO L482 AbstractCegarLoop]: Abstraction has 6361 states and 28778 transitions. [2021-06-05 05:02:49,164 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 05:02:49,164 INFO L276 IsEmpty]: Start isEmpty. Operand 6361 states and 28778 transitions. [2021-06-05 05:02:49,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:02:49,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:49,178 INFO L521 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 05:02:49,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 05:02:49,178 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 05:02:49,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:49,179 INFO L82 PathProgramCache]: Analyzing trace with hash 446831401, now seen corresponding path program 1 times [2021-06-05 05:02:49,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:49,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154802731] [2021-06-05 05:02:49,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:49,287 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 05:02:49,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:49,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154802731] [2021-06-05 05:02:49,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154802731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:49,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984405539] [2021-06-05 05:02:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:49,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 05:02:49,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:49,512 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 05:02:49,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984405539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:49,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:49,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 05:02:49,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883373819] [2021-06-05 05:02:49,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:02:49,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:49,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:02:49,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:02:49,513 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 05:02:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:49,653 INFO L93 Difference]: Finished difference Result 13742 states and 61751 transitions. [2021-06-05 05:02:49,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:02:49,653 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 05:02:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:49,700 INFO L225 Difference]: With dead ends: 13742 [2021-06-05 05:02:49,701 INFO L226 Difference]: Without dead ends: 13742 [2021-06-05 05:02:49,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:02:49,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2021-06-05 05:02:49,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 7994. [2021-06-05 05:02:49,943 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 05:02:49,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7994 states to 7994 states and 36460 transitions. [2021-06-05 05:02:49,970 INFO L78 Accepts]: Start accepts. Automaton has 7994 states and 36460 transitions. Word has length 30 [2021-06-05 05:02:49,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:49,970 INFO L482 AbstractCegarLoop]: Abstraction has 7994 states and 36460 transitions. [2021-06-05 05:02:49,970 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 05:02:49,970 INFO L276 IsEmpty]: Start isEmpty. Operand 7994 states and 36460 transitions. [2021-06-05 05:02:49,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:02:49,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:49,988 INFO L521 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 05:02:50,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:50,203 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 05:02:50,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:50,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1475397024, now seen corresponding path program 1 times [2021-06-05 05:02:50,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:50,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372069144] [2021-06-05 05:02:50,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:50,285 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 05:02:50,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:50,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372069144] [2021-06-05 05:02:50,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372069144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:50,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459351958] [2021-06-05 05:02:50,286 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 05:02:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:50,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 05:02:50,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:50,406 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 05:02:50,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459351958] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:02:50,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 05:02:50,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-06-05 05:02:50,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836729546] [2021-06-05 05:02:50,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:02:50,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:50,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:02:50,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:02:50,411 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 05:02:50,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:50,587 INFO L93 Difference]: Finished difference Result 11412 states and 52000 transitions. [2021-06-05 05:02:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:02:50,588 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 05:02:50,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:50,627 INFO L225 Difference]: With dead ends: 11412 [2021-06-05 05:02:50,627 INFO L226 Difference]: Without dead ends: 11118 [2021-06-05 05:02:50,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:02:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11118 states. [2021-06-05 05:02:50,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11118 to 8742. [2021-06-05 05:02:50,890 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 05:02:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 40161 transitions. [2021-06-05 05:02:50,916 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 40161 transitions. Word has length 30 [2021-06-05 05:02:50,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:50,916 INFO L482 AbstractCegarLoop]: Abstraction has 8742 states and 40161 transitions. [2021-06-05 05:02:50,916 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 05:02:50,916 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 40161 transitions. [2021-06-05 05:02:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:02:50,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:50,934 INFO L521 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 05:02:51,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:51,144 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 05:02:51,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:51,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2069837256, now seen corresponding path program 1 times [2021-06-05 05:02:51,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:51,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735494954] [2021-06-05 05:02:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:51,170 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 05:02:51,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:51,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735494954] [2021-06-05 05:02:51,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735494954] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:02:51,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:02:51,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:02:51,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424992205] [2021-06-05 05:02:51,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:02:51,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:51,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:02:51,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:02:51,171 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 05:02:51,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:51,272 INFO L93 Difference]: Finished difference Result 15516 states and 70047 transitions. [2021-06-05 05:02:51,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:02:51,273 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 05:02:51,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:51,315 INFO L225 Difference]: With dead ends: 15516 [2021-06-05 05:02:51,315 INFO L226 Difference]: Without dead ends: 15386 [2021-06-05 05:02:51,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:02:51,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15386 states. [2021-06-05 05:02:51,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15386 to 12424. [2021-06-05 05:02:51,652 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 05:02:51,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 56923 transitions. [2021-06-05 05:02:51,691 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 56923 transitions. Word has length 30 [2021-06-05 05:02:51,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:51,691 INFO L482 AbstractCegarLoop]: Abstraction has 12424 states and 56923 transitions. [2021-06-05 05:02:51,691 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 05:02:51,691 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 56923 transitions. [2021-06-05 05:02:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:02:51,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:51,717 INFO L521 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 05:02:51,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 05:02:51,717 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 05:02:51,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:51,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1099254369, now seen corresponding path program 1 times [2021-06-05 05:02:51,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:51,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922786820] [2021-06-05 05:02:51,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:51,733 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 05:02:51,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:51,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922786820] [2021-06-05 05:02:51,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922786820] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:02:51,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:02:51,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:02:51,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135934654] [2021-06-05 05:02:51,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:02:51,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:51,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:02:51,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:02:51,735 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 05:02:51,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:51,980 INFO L93 Difference]: Finished difference Result 22857 states and 102629 transitions. [2021-06-05 05:02:51,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:02:51,981 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 05:02:51,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:52,050 INFO L225 Difference]: With dead ends: 22857 [2021-06-05 05:02:52,050 INFO L226 Difference]: Without dead ends: 22667 [2021-06-05 05:02:52,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:02:52,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22667 states. [2021-06-05 05:02:52,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22667 to 18333. [2021-06-05 05:02:52,418 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 05:02:52,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18333 states to 18333 states and 84369 transitions. [2021-06-05 05:02:52,637 INFO L78 Accepts]: Start accepts. Automaton has 18333 states and 84369 transitions. Word has length 30 [2021-06-05 05:02:52,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:52,637 INFO L482 AbstractCegarLoop]: Abstraction has 18333 states and 84369 transitions. [2021-06-05 05:02:52,638 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 05:02:52,638 INFO L276 IsEmpty]: Start isEmpty. Operand 18333 states and 84369 transitions. [2021-06-05 05:02:52,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:02:52,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:52,673 INFO L521 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 05:02:52,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 05:02:52,673 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 05:02:52,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:52,674 INFO L82 PathProgramCache]: Analyzing trace with hash -463993696, now seen corresponding path program 2 times [2021-06-05 05:02:52,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:52,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988689805] [2021-06-05 05:02:52,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:52,723 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 05:02:52,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:52,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988689805] [2021-06-05 05:02:52,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988689805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:52,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552559419] [2021-06-05 05:02:52,724 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 05:02:52,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:02:52,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:52,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:02:52,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:52,814 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 05:02:52,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552559419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:52,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:52,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-06-05 05:02:52,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215332816] [2021-06-05 05:02:52,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:02:52,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:52,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:02:52,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:02:52,815 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 05:02:53,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:53,950 INFO L93 Difference]: Finished difference Result 64631 states and 282480 transitions. [2021-06-05 05:02:53,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:02:53,950 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 05:02:53,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:54,109 INFO L225 Difference]: With dead ends: 64631 [2021-06-05 05:02:54,109 INFO L226 Difference]: Without dead ends: 50671 [2021-06-05 05:02:54,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:02:54,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50671 states. [2021-06-05 05:02:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50671 to 22433. [2021-06-05 05:02:54,911 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 05:02:54,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22433 states to 22433 states and 102593 transitions. [2021-06-05 05:02:54,981 INFO L78 Accepts]: Start accepts. Automaton has 22433 states and 102593 transitions. Word has length 30 [2021-06-05 05:02:54,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:54,982 INFO L482 AbstractCegarLoop]: Abstraction has 22433 states and 102593 transitions. [2021-06-05 05:02:54,982 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 05:02:54,982 INFO L276 IsEmpty]: Start isEmpty. Operand 22433 states and 102593 transitions. [2021-06-05 05:02:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:02:55,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:55,024 INFO L521 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 05:02:55,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:55,237 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 05:02:55,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:55,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1194115521, now seen corresponding path program 2 times [2021-06-05 05:02:55,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:55,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249988847] [2021-06-05 05:02:55,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:55,269 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 05:02:55,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:55,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249988847] [2021-06-05 05:02:55,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249988847] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:02:55,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:02:55,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:02:55,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637286495] [2021-06-05 05:02:55,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:02:55,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:55,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:02:55,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:02:55,270 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 05:02:55,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:55,423 INFO L93 Difference]: Finished difference Result 27166 states and 122184 transitions. [2021-06-05 05:02:55,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:02:55,424 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 05:02:55,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:55,495 INFO L225 Difference]: With dead ends: 27166 [2021-06-05 05:02:55,495 INFO L226 Difference]: Without dead ends: 26834 [2021-06-05 05:02:55,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:02:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26834 states. [2021-06-05 05:02:56,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26834 to 22633. [2021-06-05 05:02:56,084 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 05:02:56,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22633 states to 22633 states and 103025 transitions. [2021-06-05 05:02:56,149 INFO L78 Accepts]: Start accepts. Automaton has 22633 states and 103025 transitions. Word has length 30 [2021-06-05 05:02:56,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:56,149 INFO L482 AbstractCegarLoop]: Abstraction has 22633 states and 103025 transitions. [2021-06-05 05:02:56,149 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 05:02:56,150 INFO L276 IsEmpty]: Start isEmpty. Operand 22633 states and 103025 transitions. [2021-06-05 05:02:56,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:02:56,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:56,190 INFO L521 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 05:02:56,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 05:02:56,190 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 05:02:56,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:56,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1747092604, now seen corresponding path program 2 times [2021-06-05 05:02:56,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:56,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502344765] [2021-06-05 05:02:56,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:56,205 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 05:02:56,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:56,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502344765] [2021-06-05 05:02:56,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502344765] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:02:56,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:02:56,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:02:56,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252964144] [2021-06-05 05:02:56,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:02:56,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:56,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:02:56,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:02:56,207 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 05:02:56,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:56,523 INFO L93 Difference]: Finished difference Result 24325 states and 108741 transitions. [2021-06-05 05:02:56,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:02:56,524 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 05:02:56,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:56,591 INFO L225 Difference]: With dead ends: 24325 [2021-06-05 05:02:56,591 INFO L226 Difference]: Without dead ends: 24325 [2021-06-05 05:02:56,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:02:56,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24325 states. [2021-06-05 05:02:57,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24325 to 21261. [2021-06-05 05:02:57,033 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 05:02:57,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21261 states to 21261 states and 96732 transitions. [2021-06-05 05:02:57,109 INFO L78 Accepts]: Start accepts. Automaton has 21261 states and 96732 transitions. Word has length 30 [2021-06-05 05:02:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:57,110 INFO L482 AbstractCegarLoop]: Abstraction has 21261 states and 96732 transitions. [2021-06-05 05:02:57,110 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 05:02:57,110 INFO L276 IsEmpty]: Start isEmpty. Operand 21261 states and 96732 transitions. [2021-06-05 05:02:57,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:02:57,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:57,150 INFO L521 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 05:02:57,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 05:02:57,151 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 05:02:57,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:57,151 INFO L82 PathProgramCache]: Analyzing trace with hash -535896376, now seen corresponding path program 3 times [2021-06-05 05:02:57,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:57,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666330839] [2021-06-05 05:02:57,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:57,200 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 05:02:57,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:57,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666330839] [2021-06-05 05:02:57,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666330839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:57,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64190096] [2021-06-05 05:02:57,201 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 05:02:57,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:02:57,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:57,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:02:57,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:57,286 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 05:02:57,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64190096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:57,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:57,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-06-05 05:02:57,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482646163] [2021-06-05 05:02:57,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:02:57,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:57,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:02:57,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:02:57,289 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 05:02:57,486 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 05:02:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:58,423 INFO L93 Difference]: Finished difference Result 67384 states and 295897 transitions. [2021-06-05 05:02:58,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:02:58,424 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 05:02:58,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:58,515 INFO L225 Difference]: With dead ends: 67384 [2021-06-05 05:02:58,516 INFO L226 Difference]: Without dead ends: 35063 [2021-06-05 05:02:58,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=427, Invalid=1465, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:02:58,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35063 states. [2021-06-05 05:02:59,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35063 to 19352. [2021-06-05 05:02:59,167 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 05:02:59,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19352 states to 19352 states and 87163 transitions. [2021-06-05 05:02:59,223 INFO L78 Accepts]: Start accepts. Automaton has 19352 states and 87163 transitions. Word has length 30 [2021-06-05 05:02:59,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:59,223 INFO L482 AbstractCegarLoop]: Abstraction has 19352 states and 87163 transitions. [2021-06-05 05:02:59,223 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 05:02:59,223 INFO L276 IsEmpty]: Start isEmpty. Operand 19352 states and 87163 transitions. [2021-06-05 05:02:59,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:02:59,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:59,257 INFO L521 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 05:02:59,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:59,458 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 05:02:59,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:59,458 INFO L82 PathProgramCache]: Analyzing trace with hash -372569844, now seen corresponding path program 3 times [2021-06-05 05:02:59,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:59,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299470159] [2021-06-05 05:02:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:59,485 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 05:02:59,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:59,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299470159] [2021-06-05 05:02:59,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299470159] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:02:59,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:02:59,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:02:59,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690033589] [2021-06-05 05:02:59,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:02:59,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:59,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:02:59,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:02:59,487 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 05:02:59,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:59,609 INFO L93 Difference]: Finished difference Result 20461 states and 91087 transitions. [2021-06-05 05:02:59,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:02:59,610 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 05:02:59,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:59,661 INFO L225 Difference]: With dead ends: 20461 [2021-06-05 05:02:59,661 INFO L226 Difference]: Without dead ends: 19957 [2021-06-05 05:02:59,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:02:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19957 states. [2021-06-05 05:03:00,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19957 to 18072. [2021-06-05 05:03:00,152 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 05:03:00,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18072 states to 18072 states and 81050 transitions. [2021-06-05 05:03:00,203 INFO L78 Accepts]: Start accepts. Automaton has 18072 states and 81050 transitions. Word has length 30 [2021-06-05 05:03:00,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:00,204 INFO L482 AbstractCegarLoop]: Abstraction has 18072 states and 81050 transitions. [2021-06-05 05:03:00,204 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 05:03:00,204 INFO L276 IsEmpty]: Start isEmpty. Operand 18072 states and 81050 transitions. [2021-06-05 05:03:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:03:00,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:00,235 INFO L521 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 05:03:00,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 05:03:00,235 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 05:03:00,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:00,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1477081055, now seen corresponding path program 2 times [2021-06-05 05:03:00,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:00,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220024883] [2021-06-05 05:03:00,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:00,274 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 05:03:00,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:00,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220024883] [2021-06-05 05:03:00,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220024883] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:03:00,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:03:00,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:03:00,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856999936] [2021-06-05 05:03:00,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:03:00,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:00,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:03:00,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:03:00,275 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 05:03:00,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:00,420 INFO L93 Difference]: Finished difference Result 21232 states and 93393 transitions. [2021-06-05 05:03:00,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:03:00,420 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 05:03:00,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:00,468 INFO L225 Difference]: With dead ends: 21232 [2021-06-05 05:03:00,468 INFO L226 Difference]: Without dead ends: 20403 [2021-06-05 05:03:00,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:03:00,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20403 states. [2021-06-05 05:03:00,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20403 to 18470. [2021-06-05 05:03:00,998 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 05:03:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18470 states to 18470 states and 82690 transitions. [2021-06-05 05:03:01,059 INFO L78 Accepts]: Start accepts. Automaton has 18470 states and 82690 transitions. Word has length 30 [2021-06-05 05:03:01,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:01,059 INFO L482 AbstractCegarLoop]: Abstraction has 18470 states and 82690 transitions. [2021-06-05 05:03:01,059 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 05:03:01,059 INFO L276 IsEmpty]: Start isEmpty. Operand 18470 states and 82690 transitions. [2021-06-05 05:03:01,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:03:01,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:01,092 INFO L521 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 05:03:01,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 05:03:01,092 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 05:03:01,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:01,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1538169193, now seen corresponding path program 3 times [2021-06-05 05:03:01,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:01,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628700746] [2021-06-05 05:03:01,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:01,143 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 05:03:01,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:01,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628700746] [2021-06-05 05:03:01,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628700746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:01,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462949270] [2021-06-05 05:03:01,144 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 05:03:01,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:03:01,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:01,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 05:03:01,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:01,221 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 05:03:01,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462949270] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:03:01,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 05:03:01,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-06-05 05:03:01,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886462666] [2021-06-05 05:03:01,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:03:01,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:01,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:03:01,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:03:01,223 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 05:03:01,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:01,352 INFO L93 Difference]: Finished difference Result 19318 states and 85766 transitions. [2021-06-05 05:03:01,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:03:01,353 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 05:03:01,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:01,401 INFO L225 Difference]: With dead ends: 19318 [2021-06-05 05:03:01,401 INFO L226 Difference]: Without dead ends: 18640 [2021-06-05 05:03:01,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:03:01,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18640 states. [2021-06-05 05:03:01,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18640 to 13099. [2021-06-05 05:03:01,684 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 05:03:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13099 states to 13099 states and 58354 transitions. [2021-06-05 05:03:01,725 INFO L78 Accepts]: Start accepts. Automaton has 13099 states and 58354 transitions. Word has length 30 [2021-06-05 05:03:01,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:01,725 INFO L482 AbstractCegarLoop]: Abstraction has 13099 states and 58354 transitions. [2021-06-05 05:03:01,725 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 05:03:01,726 INFO L276 IsEmpty]: Start isEmpty. Operand 13099 states and 58354 transitions. [2021-06-05 05:03:01,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:03:01,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:01,946 INFO L521 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 05:03:02,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 05:03:02,153 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 05:03:02,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:02,156 INFO L82 PathProgramCache]: Analyzing trace with hash -2116118737, now seen corresponding path program 1 times [2021-06-05 05:03:02,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:02,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905237249] [2021-06-05 05:03:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:02,205 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 05:03:02,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:02,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905237249] [2021-06-05 05:03:02,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905237249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:02,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423730757] [2021-06-05 05:03:02,206 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 05:03:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:02,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 05:03:02,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:02,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423730757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:02,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:02,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-06-05 05:03:02,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289570263] [2021-06-05 05:03:02,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:03:02,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:02,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:03:02,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:03:02,288 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 05:03:02,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:02,944 INFO L93 Difference]: Finished difference Result 43919 states and 200632 transitions. [2021-06-05 05:03:02,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:03:02,944 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 05:03:02,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:03,007 INFO L225 Difference]: With dead ends: 43919 [2021-06-05 05:03:03,007 INFO L226 Difference]: Without dead ends: 24373 [2021-06-05 05:03:03,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:03:03,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24373 states. [2021-06-05 05:03:03,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24373 to 9122. [2021-06-05 05:03:03,253 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 05:03:03,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9122 states to 9122 states and 41207 transitions. [2021-06-05 05:03:03,278 INFO L78 Accepts]: Start accepts. Automaton has 9122 states and 41207 transitions. Word has length 33 [2021-06-05 05:03:03,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:03,278 INFO L482 AbstractCegarLoop]: Abstraction has 9122 states and 41207 transitions. [2021-06-05 05:03:03,278 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 05:03:03,278 INFO L276 IsEmpty]: Start isEmpty. Operand 9122 states and 41207 transitions. [2021-06-05 05:03:03,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:03:03,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:03,397 INFO L521 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 05:03:03,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:03,598 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 05:03:03,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:03,598 INFO L82 PathProgramCache]: Analyzing trace with hash 2025680541, now seen corresponding path program 1 times [2021-06-05 05:03:03,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:03,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275773691] [2021-06-05 05:03:03,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:03,670 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 05:03:03,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:03,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275773691] [2021-06-05 05:03:03,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275773691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:03,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815304928] [2021-06-05 05:03:03,670 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 05:03:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:03,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 05:03:03,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:03,768 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 05:03:03,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815304928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:03,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:03,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-06-05 05:03:03,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444801560] [2021-06-05 05:03:03,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:03:03,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:03,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:03:03,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:03:03,769 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 05:03:04,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:04,861 INFO L93 Difference]: Finished difference Result 33369 states and 153422 transitions. [2021-06-05 05:03:04,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:03:04,861 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 05:03:04,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:04,917 INFO L225 Difference]: With dead ends: 33369 [2021-06-05 05:03:04,917 INFO L226 Difference]: Without dead ends: 23102 [2021-06-05 05:03:04,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 540.1ms TimeCoverageRelationStatistics Valid=661, Invalid=2531, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:03:04,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23102 states. [2021-06-05 05:03:05,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23102 to 9972. [2021-06-05 05:03:05,265 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 05:03:05,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9972 states to 9972 states and 45025 transitions. [2021-06-05 05:03:05,291 INFO L78 Accepts]: Start accepts. Automaton has 9972 states and 45025 transitions. Word has length 36 [2021-06-05 05:03:05,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:05,291 INFO L482 AbstractCegarLoop]: Abstraction has 9972 states and 45025 transitions. [2021-06-05 05:03:05,291 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 05:03:05,291 INFO L276 IsEmpty]: Start isEmpty. Operand 9972 states and 45025 transitions. [2021-06-05 05:03:05,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:03:05,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:05,308 INFO L521 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 05:03:05,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 05:03:05,515 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 05:03:05,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:05,515 INFO L82 PathProgramCache]: Analyzing trace with hash 2081351631, now seen corresponding path program 1 times [2021-06-05 05:03:05,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:05,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399811777] [2021-06-05 05:03:05,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:05,599 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 05:03:05,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:05,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399811777] [2021-06-05 05:03:05,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399811777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:05,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164001630] [2021-06-05 05:03:05,600 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 05:03:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:05,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:03:05,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:05,707 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 05:03:05,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:05,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:05,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:03:05,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2021-06-05 05:03:05,730 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 05:03:05,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:05,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:05,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:03:05,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-05 05:03:05,767 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 05:03:05,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164001630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:05,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:05,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 05:03:05,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074483988] [2021-06-05 05:03:05,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:03:05,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:05,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:03:05,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:03:05,768 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 05:03:06,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:06,140 INFO L93 Difference]: Finished difference Result 34805 states and 160319 transitions. [2021-06-05 05:03:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:03:06,141 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 05:03:06,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:06,205 INFO L225 Difference]: With dead ends: 34805 [2021-06-05 05:03:06,205 INFO L226 Difference]: Without dead ends: 24590 [2021-06-05 05:03:06,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:03:06,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24590 states. [2021-06-05 05:03:06,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24590 to 9804. [2021-06-05 05:03:06,452 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 05:03:06,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9804 states to 9804 states and 44451 transitions. [2021-06-05 05:03:06,480 INFO L78 Accepts]: Start accepts. Automaton has 9804 states and 44451 transitions. Word has length 39 [2021-06-05 05:03:06,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:06,480 INFO L482 AbstractCegarLoop]: Abstraction has 9804 states and 44451 transitions. [2021-06-05 05:03:06,480 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 05:03:06,480 INFO L276 IsEmpty]: Start isEmpty. Operand 9804 states and 44451 transitions. [2021-06-05 05:03:06,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:03:06,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:06,580 INFO L521 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 05:03:06,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 05:03:06,781 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 05:03:06,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:06,781 INFO L82 PathProgramCache]: Analyzing trace with hash 95025711, now seen corresponding path program 2 times [2021-06-05 05:03:06,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:06,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175626825] [2021-06-05 05:03:06,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:06,909 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 05:03:06,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:06,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175626825] [2021-06-05 05:03:06,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175626825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:06,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594215308] [2021-06-05 05:03:06,910 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 05:03:06,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:03:06,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:06,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:03:06,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:07,012 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 05:03:07,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:07,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:07,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:03:07,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 05:03:07,055 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 05:03:07,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594215308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:07,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:07,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:03:07,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033976901] [2021-06-05 05:03:07,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:03:07,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:07,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:03:07,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:03:07,057 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 05:03:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:07,473 INFO L93 Difference]: Finished difference Result 32096 states and 147329 transitions. [2021-06-05 05:03:07,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:03:07,473 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 05:03:07,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:07,517 INFO L225 Difference]: With dead ends: 32096 [2021-06-05 05:03:07,517 INFO L226 Difference]: Without dead ends: 16159 [2021-06-05 05:03:07,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:03:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16159 states. [2021-06-05 05:03:07,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16159 to 9966. [2021-06-05 05:03:07,740 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 05:03:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9966 states to 9966 states and 44781 transitions. [2021-06-05 05:03:07,773 INFO L78 Accepts]: Start accepts. Automaton has 9966 states and 44781 transitions. Word has length 39 [2021-06-05 05:03:07,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:07,773 INFO L482 AbstractCegarLoop]: Abstraction has 9966 states and 44781 transitions. [2021-06-05 05:03:07,773 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 05:03:07,773 INFO L276 IsEmpty]: Start isEmpty. Operand 9966 states and 44781 transitions. [2021-06-05 05:03:07,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:03:07,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:07,791 INFO L521 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 05:03:07,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:07,997 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 05:03:07,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:07,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1049367287, now seen corresponding path program 3 times [2021-06-05 05:03:07,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:07,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871956627] [2021-06-05 05:03:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:08,092 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 05:03:08,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:08,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871956627] [2021-06-05 05:03:08,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871956627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:08,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61250150] [2021-06-05 05:03:08,093 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 05:03:08,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:03:08,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:08,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:03:08,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:08,184 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 05:03:08,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:08,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:08,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:03:08,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 05:03:08,224 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 05:03:08,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61250150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:08,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:08,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:03:08,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937880049] [2021-06-05 05:03:08,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:03:08,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:08,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:03:08,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:03:08,225 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 05:03:08,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:08,797 INFO L93 Difference]: Finished difference Result 38248 states and 176153 transitions. [2021-06-05 05:03:08,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:03:08,798 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 05:03:08,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:08,846 INFO L225 Difference]: With dead ends: 38248 [2021-06-05 05:03:08,846 INFO L226 Difference]: Without dead ends: 19645 [2021-06-05 05:03:08,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 312.2ms TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:03:08,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19645 states. [2021-06-05 05:03:09,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19645 to 10785. [2021-06-05 05:03:09,069 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 05:03:09,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10785 states to 10785 states and 48485 transitions. [2021-06-05 05:03:09,100 INFO L78 Accepts]: Start accepts. Automaton has 10785 states and 48485 transitions. Word has length 39 [2021-06-05 05:03:09,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:09,100 INFO L482 AbstractCegarLoop]: Abstraction has 10785 states and 48485 transitions. [2021-06-05 05:03:09,100 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 05:03:09,100 INFO L276 IsEmpty]: Start isEmpty. Operand 10785 states and 48485 transitions. [2021-06-05 05:03:09,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:03:09,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:09,118 INFO L521 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 05:03:09,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:09,319 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 05:03:09,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:09,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1500175273, now seen corresponding path program 4 times [2021-06-05 05:03:09,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:09,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78337087] [2021-06-05 05:03:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:09,440 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 05:03:09,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:09,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78337087] [2021-06-05 05:03:09,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78337087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:09,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243197293] [2021-06-05 05:03:09,440 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 05:03:09,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:03:09,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:09,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:03:09,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:09,526 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 05:03:09,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:09,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:09,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:03:09,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-06-05 05:03:09,547 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 05:03:09,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:09,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:09,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:03:09,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:9 [2021-06-05 05:03:09,585 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 05:03:09,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:09,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:09,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:03:09,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 05:03:09,605 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 05:03:09,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243197293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:09,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:09,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:03:09,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007410321] [2021-06-05 05:03:09,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:03:09,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:09,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:03:09,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:03:09,606 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 05:03:10,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:10,526 INFO L93 Difference]: Finished difference Result 29883 states and 135356 transitions. [2021-06-05 05:03:10,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:03:10,526 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 05:03:10,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:10,568 INFO L225 Difference]: With dead ends: 29883 [2021-06-05 05:03:10,568 INFO L226 Difference]: Without dead ends: 17348 [2021-06-05 05:03:10,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 488.0ms TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:03:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17348 states. [2021-06-05 05:03:10,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17348 to 11030. [2021-06-05 05:03:10,762 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 05:03:10,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11030 states to 11030 states and 49339 transitions. [2021-06-05 05:03:10,791 INFO L78 Accepts]: Start accepts. Automaton has 11030 states and 49339 transitions. Word has length 39 [2021-06-05 05:03:10,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:10,792 INFO L482 AbstractCegarLoop]: Abstraction has 11030 states and 49339 transitions. [2021-06-05 05:03:10,792 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 05:03:10,792 INFO L276 IsEmpty]: Start isEmpty. Operand 11030 states and 49339 transitions. [2021-06-05 05:03:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:03:10,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:10,810 INFO L521 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 05:03:11,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 05:03:11,012 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 05:03:11,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:11,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1584459695, now seen corresponding path program 5 times [2021-06-05 05:03:11,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:11,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819774808] [2021-06-05 05:03:11,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:11,131 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 05:03:11,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:11,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819774808] [2021-06-05 05:03:11,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819774808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:11,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293103863] [2021-06-05 05:03:11,131 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 05:03:11,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:03:11,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:11,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:03:11,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:11,214 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 05:03:11,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:11,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:11,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:03:11,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-06-05 05:03:11,252 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 05:03:11,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:11,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:11,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:03:11,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-05 05:03:11,273 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 05:03:11,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293103863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:11,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:11,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 05:03:11,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567766007] [2021-06-05 05:03:11,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:03:11,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:11,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:03:11,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:03:11,274 INFO L87 Difference]: Start difference. First operand 11030 states and 49339 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:12,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:12,238 INFO L93 Difference]: Finished difference Result 37384 states and 169706 transitions. [2021-06-05 05:03:12,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:03:12,238 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 05:03:12,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:12,290 INFO L225 Difference]: With dead ends: 37384 [2021-06-05 05:03:12,290 INFO L226 Difference]: Without dead ends: 20919 [2021-06-05 05:03:12,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 597.6ms TimeCoverageRelationStatistics Valid=561, Invalid=1509, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:03:12,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20919 states. [2021-06-05 05:03:12,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20919 to 11315. [2021-06-05 05:03:12,517 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 05:03:12,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11315 states to 11315 states and 50599 transitions. [2021-06-05 05:03:12,548 INFO L78 Accepts]: Start accepts. Automaton has 11315 states and 50599 transitions. Word has length 39 [2021-06-05 05:03:12,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:12,549 INFO L482 AbstractCegarLoop]: Abstraction has 11315 states and 50599 transitions. [2021-06-05 05:03:12,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:12,549 INFO L276 IsEmpty]: Start isEmpty. Operand 11315 states and 50599 transitions. [2021-06-05 05:03:12,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:03:12,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:12,567 INFO L521 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 05:03:12,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:12,768 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 05:03:12,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:12,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1173646258, now seen corresponding path program 6 times [2021-06-05 05:03:12,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:12,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301719069] [2021-06-05 05:03:12,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:12,805 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 05:03:12,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:12,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301719069] [2021-06-05 05:03:12,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301719069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:12,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952481110] [2021-06-05 05:03:12,806 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 05:03:12,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:03:12,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:12,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:03:12,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:12,915 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 05:03:12,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952481110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:12,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:12,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 05:03:12,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147116430] [2021-06-05 05:03:12,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:03:12,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:12,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:03:12,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:03:12,916 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 05:03:13,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:13,552 INFO L93 Difference]: Finished difference Result 38369 states and 174934 transitions. [2021-06-05 05:03:13,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:03:13,552 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 05:03:13,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:13,654 INFO L225 Difference]: With dead ends: 38369 [2021-06-05 05:03:13,654 INFO L226 Difference]: Without dead ends: 38168 [2021-06-05 05:03:13,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 219.0ms TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:03:13,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38168 states. [2021-06-05 05:03:14,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38168 to 27191. [2021-06-05 05:03:14,288 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 05:03:14,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27191 states to 27191 states and 126076 transitions. [2021-06-05 05:03:14,386 INFO L78 Accepts]: Start accepts. Automaton has 27191 states and 126076 transitions. Word has length 42 [2021-06-05 05:03:14,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:14,386 INFO L482 AbstractCegarLoop]: Abstraction has 27191 states and 126076 transitions. [2021-06-05 05:03:14,386 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 05:03:14,386 INFO L276 IsEmpty]: Start isEmpty. Operand 27191 states and 126076 transitions. [2021-06-05 05:03:14,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:03:14,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:14,439 INFO L521 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 05:03:14,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 05:03:14,639 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 05:03:14,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:14,639 INFO L82 PathProgramCache]: Analyzing trace with hash 22210040, now seen corresponding path program 7 times [2021-06-05 05:03:14,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:14,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530820925] [2021-06-05 05:03:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:14,681 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 05:03:14,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:14,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530820925] [2021-06-05 05:03:14,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530820925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:14,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129123974] [2021-06-05 05:03:14,681 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 05:03:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:14,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:03:14,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:14,781 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 05:03:14,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129123974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:14,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:14,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:03:14,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747158178] [2021-06-05 05:03:14,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:03:14,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:14,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:03:14,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:03:14,782 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 05:03:15,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:15,097 INFO L93 Difference]: Finished difference Result 51293 states and 237263 transitions. [2021-06-05 05:03:15,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:03:15,097 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 05:03:15,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:15,252 INFO L225 Difference]: With dead ends: 51293 [2021-06-05 05:03:15,252 INFO L226 Difference]: Without dead ends: 51193 [2021-06-05 05:03:15,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:03:15,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51193 states. [2021-06-05 05:03:16,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51193 to 32278. [2021-06-05 05:03:16,070 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 05:03:16,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32278 states to 32278 states and 152515 transitions. [2021-06-05 05:03:16,190 INFO L78 Accepts]: Start accepts. Automaton has 32278 states and 152515 transitions. Word has length 42 [2021-06-05 05:03:16,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:16,190 INFO L482 AbstractCegarLoop]: Abstraction has 32278 states and 152515 transitions. [2021-06-05 05:03:16,190 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 05:03:16,190 INFO L276 IsEmpty]: Start isEmpty. Operand 32278 states and 152515 transitions. [2021-06-05 05:03:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:03:16,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:16,256 INFO L521 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 05:03:16,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:16,457 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 05:03:16,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:16,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2076260328, now seen corresponding path program 8 times [2021-06-05 05:03:16,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:16,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502774087] [2021-06-05 05:03:16,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:16,483 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 05:03:16,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:16,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502774087] [2021-06-05 05:03:16,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502774087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:16,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411436794] [2021-06-05 05:03:16,484 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 05:03:16,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:03:16,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:16,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:03:16,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:16,583 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 05:03:16,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411436794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:16,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:16,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:03:16,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740322158] [2021-06-05 05:03:16,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:03:16,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:16,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:03:16,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:03:16,584 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 05:03:16,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:16,899 INFO L93 Difference]: Finished difference Result 48003 states and 221808 transitions. [2021-06-05 05:03:16,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:03:16,900 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 05:03:16,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:17,040 INFO L225 Difference]: With dead ends: 48003 [2021-06-05 05:03:17,041 INFO L226 Difference]: Without dead ends: 48003 [2021-06-05 05:03:17,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:03:17,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48003 states. [2021-06-05 05:03:17,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48003 to 31277. [2021-06-05 05:03:17,859 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 05:03:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31277 states to 31277 states and 147558 transitions. [2021-06-05 05:03:17,977 INFO L78 Accepts]: Start accepts. Automaton has 31277 states and 147558 transitions. Word has length 42 [2021-06-05 05:03:17,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:17,977 INFO L482 AbstractCegarLoop]: Abstraction has 31277 states and 147558 transitions. [2021-06-05 05:03:17,977 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 05:03:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 31277 states and 147558 transitions. [2021-06-05 05:03:18,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:03:18,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:18,043 INFO L521 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 05:03:18,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 05:03:18,243 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 05:03:18,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:18,243 INFO L82 PathProgramCache]: Analyzing trace with hash 31127056, now seen corresponding path program 9 times [2021-06-05 05:03:18,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:18,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700851078] [2021-06-05 05:03:18,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:18,265 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 05:03:18,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:18,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700851078] [2021-06-05 05:03:18,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700851078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:18,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641181983] [2021-06-05 05:03:18,266 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 05:03:18,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:03:18,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:18,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:03:18,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:18,351 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 05:03:18,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641181983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:18,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:18,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 05:03:18,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895106073] [2021-06-05 05:03:18,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:03:18,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:18,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:03:18,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:03:18,352 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 05:03:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:18,783 INFO L93 Difference]: Finished difference Result 59008 states and 276119 transitions. [2021-06-05 05:03:18,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:03:18,784 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 05:03:18,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:18,971 INFO L225 Difference]: With dead ends: 59008 [2021-06-05 05:03:18,971 INFO L226 Difference]: Without dead ends: 59008 [2021-06-05 05:03:18,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:03:19,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59008 states. [2021-06-05 05:03:19,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59008 to 42789. [2021-06-05 05:03:19,864 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 05:03:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42789 states to 42789 states and 204938 transitions. [2021-06-05 05:03:20,027 INFO L78 Accepts]: Start accepts. Automaton has 42789 states and 204938 transitions. Word has length 42 [2021-06-05 05:03:20,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:20,028 INFO L482 AbstractCegarLoop]: Abstraction has 42789 states and 204938 transitions. [2021-06-05 05:03:20,028 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 05:03:20,028 INFO L276 IsEmpty]: Start isEmpty. Operand 42789 states and 204938 transitions. [2021-06-05 05:03:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:03:20,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:20,116 INFO L521 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 05:03:20,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:20,321 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 05:03:20,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:20,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1944125966, now seen corresponding path program 10 times [2021-06-05 05:03:20,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:20,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909212438] [2021-06-05 05:03:20,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:20,342 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 05:03:20,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:20,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909212438] [2021-06-05 05:03:20,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909212438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:20,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277545976] [2021-06-05 05:03:20,343 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 05:03:20,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:03:20,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:20,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:03:20,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:20,443 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 05:03:20,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277545976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:20,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:20,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:03:20,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201874031] [2021-06-05 05:03:20,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:03:20,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:20,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:03:20,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:03:20,444 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 05:03:20,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:20,798 INFO L93 Difference]: Finished difference Result 49547 states and 233319 transitions. [2021-06-05 05:03:20,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:03:20,798 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 05:03:20,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:20,961 INFO L225 Difference]: With dead ends: 49547 [2021-06-05 05:03:20,961 INFO L226 Difference]: Without dead ends: 49492 [2021-06-05 05:03:20,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:03:21,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49492 states. [2021-06-05 05:03:21,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49492 to 42675. [2021-06-05 05:03:21,859 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 05:03:22,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42675 states to 42675 states and 204519 transitions. [2021-06-05 05:03:22,022 INFO L78 Accepts]: Start accepts. Automaton has 42675 states and 204519 transitions. Word has length 42 [2021-06-05 05:03:22,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:22,022 INFO L482 AbstractCegarLoop]: Abstraction has 42675 states and 204519 transitions. [2021-06-05 05:03:22,022 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 05:03:22,022 INFO L276 IsEmpty]: Start isEmpty. Operand 42675 states and 204519 transitions. [2021-06-05 05:03:22,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:03:22,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:22,110 INFO L521 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 05:03:22,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 05:03:22,313 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 05:03:22,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:22,313 INFO L82 PathProgramCache]: Analyzing trace with hash -484411891, now seen corresponding path program 11 times [2021-06-05 05:03:22,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:22,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128784952] [2021-06-05 05:03:22,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:22,346 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 05:03:22,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:22,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128784952] [2021-06-05 05:03:22,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128784952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:22,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292379044] [2021-06-05 05:03:22,347 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 05:03:22,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:03:22,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:22,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:03:22,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:22,457 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 05:03:22,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292379044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:22,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:22,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 05:03:22,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112606242] [2021-06-05 05:03:22,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:03:22,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:22,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:03:22,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:03:22,458 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 05:03:23,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:23,245 INFO L93 Difference]: Finished difference Result 86712 states and 419227 transitions. [2021-06-05 05:03:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:03:23,245 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 05:03:23,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:23,519 INFO L225 Difference]: With dead ends: 86712 [2021-06-05 05:03:23,520 INFO L226 Difference]: Without dead ends: 85513 [2021-06-05 05:03:23,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:03:23,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85513 states. [2021-06-05 05:03:24,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85513 to 68374. [2021-06-05 05:03:25,081 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 05:03:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68374 states to 68374 states and 335859 transitions. [2021-06-05 05:03:25,373 INFO L78 Accepts]: Start accepts. Automaton has 68374 states and 335859 transitions. Word has length 42 [2021-06-05 05:03:25,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:25,374 INFO L482 AbstractCegarLoop]: Abstraction has 68374 states and 335859 transitions. [2021-06-05 05:03:25,374 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 05:03:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 68374 states and 335859 transitions. [2021-06-05 05:03:25,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:03:25,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:25,538 INFO L521 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 05:03:25,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 05:03:25,739 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 05:03:25,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:25,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2044211746, now seen corresponding path program 12 times [2021-06-05 05:03:25,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:25,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305138024] [2021-06-05 05:03:25,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:25,763 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 05:03:25,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:25,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305138024] [2021-06-05 05:03:25,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305138024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:25,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299916140] [2021-06-05 05:03:25,764 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 05:03:25,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:03:25,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:25,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:03:25,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:25,868 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 05:03:25,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299916140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:25,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:25,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 05:03:25,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614007807] [2021-06-05 05:03:25,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:03:25,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:25,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:03:25,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:03:25,871 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 05:03:28,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:28,344 INFO L93 Difference]: Finished difference Result 206654 states and 1010518 transitions. [2021-06-05 05:03:28,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:03:28,345 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 05:03:28,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:29,533 INFO L225 Difference]: With dead ends: 206654 [2021-06-05 05:03:29,534 INFO L226 Difference]: Without dead ends: 206654 [2021-06-05 05:03:29,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=286, Invalid=974, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:03:29,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206654 states. [2021-06-05 05:03:33,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206654 to 149917. [2021-06-05 05:03:33,349 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 05:03:34,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149917 states to 149917 states and 753094 transitions. [2021-06-05 05:03:34,543 INFO L78 Accepts]: Start accepts. Automaton has 149917 states and 753094 transitions. Word has length 45 [2021-06-05 05:03:34,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:34,544 INFO L482 AbstractCegarLoop]: Abstraction has 149917 states and 753094 transitions. [2021-06-05 05:03:34,544 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 05:03:34,544 INFO L276 IsEmpty]: Start isEmpty. Operand 149917 states and 753094 transitions. [2021-06-05 05:03:34,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:03:34,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:34,984 INFO L521 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 05:03:35,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 05:03:35,185 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 05:03:35,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:35,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1709886164, now seen corresponding path program 13 times [2021-06-05 05:03:35,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:35,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102195310] [2021-06-05 05:03:35,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:35,207 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 05:03:35,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:35,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102195310] [2021-06-05 05:03:35,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102195310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:35,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895903958] [2021-06-05 05:03:35,207 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 05:03:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:35,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:03:35,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:35,310 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 05:03:35,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895903958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:35,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:35,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 05:03:35,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284877978] [2021-06-05 05:03:35,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:03:35,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:35,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:03:35,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:03:35,311 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 05:03:41,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:41,964 INFO L93 Difference]: Finished difference Result 623344 states and 3160632 transitions. [2021-06-05 05:03:41,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:03:41,965 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 05:03:41,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:45,479 INFO L225 Difference]: With dead ends: 623344 [2021-06-05 05:03:45,479 INFO L226 Difference]: Without dead ends: 606012 [2021-06-05 05:03:45,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 712.4ms TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:03:47,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606012 states. [2021-06-05 05:03:59,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606012 to 382514. [2021-06-05 05:04:00,266 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 05:04:03,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382514 states to 382514 states and 2012489 transitions. [2021-06-05 05:04:03,711 INFO L78 Accepts]: Start accepts. Automaton has 382514 states and 2012489 transitions. Word has length 45 [2021-06-05 05:04:03,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:03,711 INFO L482 AbstractCegarLoop]: Abstraction has 382514 states and 2012489 transitions. [2021-06-05 05:04:03,711 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 05:04:03,712 INFO L276 IsEmpty]: Start isEmpty. Operand 382514 states and 2012489 transitions. [2021-06-05 05:04:05,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:04:05,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:05,446 INFO L521 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 05:04:05,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:05,646 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 05:04:05,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:05,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1403620225, now seen corresponding path program 14 times [2021-06-05 05:04:05,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:05,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541708902] [2021-06-05 05:04:05,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:05,667 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 05:04:05,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:05,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541708902] [2021-06-05 05:04:05,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541708902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:05,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832233592] [2021-06-05 05:04:05,667 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 05:04:05,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:05,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:05,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:04:05,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:05,753 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 05:04:05,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832233592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:05,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:05,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 05:04:05,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508206632] [2021-06-05 05:04:05,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:04:05,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:05,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:04:05,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:04:05,754 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)