/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:37:23,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:37:23,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:37:23,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:37:23,129 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 05:37:23,165 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:37:23,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:37:23,165 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:37:23,166 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:37:23,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:37:23,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:37:23,168 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:37:23,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:37:23,169 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:37:23,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:37:23,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:37:23,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:37:23,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:37:23,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:37:23,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:37:23,170 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:37:23,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:37:23,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:37:23,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:37:23,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:37:23,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:37:23,171 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:37:23,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:37:23,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:37:23,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:37:23,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:37:23,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:37:23,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:37:23,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:37:23,172 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:37:23,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:37:23,172 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:37:23,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:37:23,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:37:23,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:37:23,501 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:37:23,505 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:37:23,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl [2021-06-05 05:37:23,506 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl' [2021-06-05 05:37:23,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:37:23,540 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:37:23,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:37:23,541 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:37:23,541 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:37:23,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:23" (1/1) ... [2021-06-05 05:37:23,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:23" (1/1) ... [2021-06-05 05:37:23,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:37:23,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:37:23,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:37:23,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:37:23,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:23" (1/1) ... [2021-06-05 05:37:23,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:23" (1/1) ... [2021-06-05 05:37:23,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:23" (1/1) ... [2021-06-05 05:37:23,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:23" (1/1) ... [2021-06-05 05:37:23,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:23" (1/1) ... [2021-06-05 05:37:23,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:23" (1/1) ... [2021-06-05 05:37:23,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:23" (1/1) ... [2021-06-05 05:37:23,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:37:23,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:37:23,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:37:23,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:37:23,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:23" (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 05:37:23,659 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:37:23,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:37:23,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:37:23,660 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:37:23,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:37:23,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:37:23,660 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:37:23,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:37:23,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:37:23,661 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 05:37:23,661 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 05:37:23,661 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 05:37:23,661 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 05:37:23,661 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 05:37:23,661 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 05:37:23,662 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 05:37:23,967 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:37:23,967 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:37:23,969 INFO L202 PluginConnector]: Adding new model mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:37:23 BoogieIcfgContainer [2021-06-05 05:37:23,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:37:23,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:37:23,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:37:23,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:37:23,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:37:23" (1/2) ... [2021-06-05 05:37:23,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33756711 and model type mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:37:23, skipping insertion in model container [2021-06-05 05:37:23,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:37:23" (2/2) ... [2021-06-05 05:37:23,975 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-4.wvr.bpl [2021-06-05 05:37:23,980 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:37:23,980 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:37:23,980 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:37:23,981 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:37:24,070 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 05:37:24,089 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 05:37:24,121 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:37:24,121 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:37:24,122 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:37:24,122 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:37:24,122 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:37:24,122 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:37:24,122 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:37:24,122 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:37:24,136 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 36 transitions, 104 flow [2021-06-05 05:37:24,189 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 434 states, 432 states have (on average 3.837962962962963) internal successors, (1658), 433 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:24,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 434 states, 432 states have (on average 3.837962962962963) internal successors, (1658), 433 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:24,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:37:24,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:24,215 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] [2021-06-05 05:37:24,215 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:24,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:24,220 INFO L82 PathProgramCache]: Analyzing trace with hash -412067460, now seen corresponding path program 1 times [2021-06-05 05:37:24,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:24,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865807041] [2021-06-05 05:37:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:24,395 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 05:37:24,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:24,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865807041] [2021-06-05 05:37:24,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865807041] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:37:24,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:37:24,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:37:24,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834877548] [2021-06-05 05:37:24,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:37:24,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:24,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:37:24,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:37:24,414 INFO L87 Difference]: Start difference. First operand has 434 states, 432 states have (on average 3.837962962962963) internal successors, (1658), 433 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:24,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:24,476 INFO L93 Difference]: Finished difference Result 857 states and 3120 transitions. [2021-06-05 05:37:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:37:24,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:37:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:24,498 INFO L225 Difference]: With dead ends: 857 [2021-06-05 05:37:24,499 INFO L226 Difference]: Without dead ends: 732 [2021-06-05 05:37:24,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:37:24,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-06-05 05:37:24,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 698. [2021-06-05 05:37:24,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 3.720229555236729) internal successors, (2593), 697 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:24,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2593 transitions. [2021-06-05 05:37:24,601 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2593 transitions. Word has length 22 [2021-06-05 05:37:24,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:24,602 INFO L482 AbstractCegarLoop]: Abstraction has 698 states and 2593 transitions. [2021-06-05 05:37:24,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:24,602 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2593 transitions. [2021-06-05 05:37:24,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:37:24,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:24,605 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] [2021-06-05 05:37:24,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:37:24,606 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:24,607 INFO L82 PathProgramCache]: Analyzing trace with hash 571605306, now seen corresponding path program 1 times [2021-06-05 05:37:24,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:24,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003698710] [2021-06-05 05:37:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:24,686 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 05:37:24,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:24,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003698710] [2021-06-05 05:37:24,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003698710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:24,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732280606] [2021-06-05 05:37:24,687 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 05:37:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:24,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:37:24,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:24,882 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 05:37:24,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732280606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:24,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:24,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-06-05 05:37:24,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224849041] [2021-06-05 05:37:24,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:37:24,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:24,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:37:24,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:37:24,885 INFO L87 Difference]: Start difference. First operand 698 states and 2593 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:25,008 INFO L93 Difference]: Finished difference Result 1528 states and 5659 transitions. [2021-06-05 05:37:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:37:25,009 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:37:25,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:25,021 INFO L225 Difference]: With dead ends: 1528 [2021-06-05 05:37:25,022 INFO L226 Difference]: Without dead ends: 1528 [2021-06-05 05:37:25,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:37:25,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-06-05 05:37:25,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 838. [2021-06-05 05:37:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.771804062126643) internal successors, (3157), 837 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 3157 transitions. [2021-06-05 05:37:25,083 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 3157 transitions. Word has length 24 [2021-06-05 05:37:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:25,084 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 3157 transitions. [2021-06-05 05:37:25,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:25,084 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 3157 transitions. [2021-06-05 05:37:25,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:37:25,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:25,087 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] [2021-06-05 05:37:25,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 05:37:25,301 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:25,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:25,301 INFO L82 PathProgramCache]: Analyzing trace with hash 2854590, now seen corresponding path program 1 times [2021-06-05 05:37:25,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:25,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627631605] [2021-06-05 05:37:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:25,401 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 05:37:25,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:25,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627631605] [2021-06-05 05:37:25,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627631605] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:37:25,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:37:25,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:37:25,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064002210] [2021-06-05 05:37:25,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:37:25,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:25,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:37:25,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:25,403 INFO L87 Difference]: Start difference. First operand 838 states and 3157 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:25,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:25,466 INFO L93 Difference]: Finished difference Result 1187 states and 4245 transitions. [2021-06-05 05:37:25,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:37:25,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:37:25,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:25,474 INFO L225 Difference]: With dead ends: 1187 [2021-06-05 05:37:25,474 INFO L226 Difference]: Without dead ends: 1077 [2021-06-05 05:37:25,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:37:25,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2021-06-05 05:37:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 806. [2021-06-05 05:37:25,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.7950310559006213) internal successors, (3055), 805 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 3055 transitions. [2021-06-05 05:37:25,504 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 3055 transitions. Word has length 24 [2021-06-05 05:37:25,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:25,504 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 3055 transitions. [2021-06-05 05:37:25,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:25,505 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 3055 transitions. [2021-06-05 05:37:25,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:37:25,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:25,507 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] [2021-06-05 05:37:25,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 05:37:25,507 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:25,508 INFO L82 PathProgramCache]: Analyzing trace with hash -257890470, now seen corresponding path program 2 times [2021-06-05 05:37:25,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:25,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799041405] [2021-06-05 05:37:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:25,539 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 05:37:25,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:25,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799041405] [2021-06-05 05:37:25,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799041405] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:37:25,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:37:25,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:37:25,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252456665] [2021-06-05 05:37:25,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:37:25,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:25,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:37:25,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:37:25,541 INFO L87 Difference]: Start difference. First operand 806 states and 3055 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:25,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:25,576 INFO L93 Difference]: Finished difference Result 1023 states and 3746 transitions. [2021-06-05 05:37:25,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:37:25,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:37:25,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:25,584 INFO L225 Difference]: With dead ends: 1023 [2021-06-05 05:37:25,584 INFO L226 Difference]: Without dead ends: 1023 [2021-06-05 05:37:25,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:25,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-06-05 05:37:25,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 848. [2021-06-05 05:37:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.7485242030696577) internal successors, (3175), 847 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:25,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 3175 transitions. [2021-06-05 05:37:25,613 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 3175 transitions. Word has length 24 [2021-06-05 05:37:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:25,613 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 3175 transitions. [2021-06-05 05:37:25,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:25,613 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 3175 transitions. [2021-06-05 05:37:25,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:37:25,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:25,616 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] [2021-06-05 05:37:25,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 05:37:25,616 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:25,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:25,617 INFO L82 PathProgramCache]: Analyzing trace with hash 370394274, now seen corresponding path program 2 times [2021-06-05 05:37:25,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:25,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527463095] [2021-06-05 05:37:25,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:25,647 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 05:37:25,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:25,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527463095] [2021-06-05 05:37:25,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527463095] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:37:25,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:37:25,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:37:25,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905500737] [2021-06-05 05:37:25,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:37:25,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:25,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:37:25,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:37:25,648 INFO L87 Difference]: Start difference. First operand 848 states and 3175 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:25,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:25,693 INFO L93 Difference]: Finished difference Result 1118 states and 4122 transitions. [2021-06-05 05:37:25,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:37:25,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:37:25,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:25,700 INFO L225 Difference]: With dead ends: 1118 [2021-06-05 05:37:25,701 INFO L226 Difference]: Without dead ends: 1048 [2021-06-05 05:37:25,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:37:25,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-06-05 05:37:25,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 860. [2021-06-05 05:37:25,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.7671711292200234) internal successors, (3236), 859 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:25,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 3236 transitions. [2021-06-05 05:37:25,730 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 3236 transitions. Word has length 24 [2021-06-05 05:37:25,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:25,730 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 3236 transitions. [2021-06-05 05:37:25,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:25,731 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 3236 transitions. [2021-06-05 05:37:25,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:37:25,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:25,735 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] [2021-06-05 05:37:25,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 05:37:25,735 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:25,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:25,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1537471606, now seen corresponding path program 3 times [2021-06-05 05:37:25,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:25,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586297444] [2021-06-05 05:37:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:25,833 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 05:37:25,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:25,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586297444] [2021-06-05 05:37:25,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586297444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:25,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944870844] [2021-06-05 05:37:25,833 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 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 05:37:25,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:37:25,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:25,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:37:25,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:25,983 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 05:37:25,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944870844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:25,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:25,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-06-05 05:37:25,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061587105] [2021-06-05 05:37:25,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:37:25,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:25,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:37:25,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:37:25,985 INFO L87 Difference]: Start difference. First operand 860 states and 3236 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:26,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:26,050 INFO L93 Difference]: Finished difference Result 882 states and 3347 transitions. [2021-06-05 05:37:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:37:26,051 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:37:26,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:26,056 INFO L225 Difference]: With dead ends: 882 [2021-06-05 05:37:26,056 INFO L226 Difference]: Without dead ends: 822 [2021-06-05 05:37:26,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:37:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-06-05 05:37:26,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 702. [2021-06-05 05:37:26,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 3.843081312410842) internal successors, (2694), 701 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:26,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 2694 transitions. [2021-06-05 05:37:26,082 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 2694 transitions. Word has length 24 [2021-06-05 05:37:26,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:26,083 INFO L482 AbstractCegarLoop]: Abstraction has 702 states and 2694 transitions. [2021-06-05 05:37:26,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:26,083 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 2694 transitions. [2021-06-05 05:37:26,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:37:26,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:26,085 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] [2021-06-05 05:37:26,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:26,301 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:26,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:26,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1935675546, now seen corresponding path program 1 times [2021-06-05 05:37:26,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:26,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831001370] [2021-06-05 05:37:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:26,389 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 05:37:26,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:26,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831001370] [2021-06-05 05:37:26,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831001370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:26,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324507948] [2021-06-05 05:37:26,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 05:37:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:26,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:37:26,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:26,564 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 05:37:26,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324507948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:26,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:26,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 05:37:26,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617735012] [2021-06-05 05:37:26,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:37:26,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:26,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:37:26,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:37:26,566 INFO L87 Difference]: Start difference. First operand 702 states and 2694 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:26,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:26,647 INFO L93 Difference]: Finished difference Result 926 states and 3582 transitions. [2021-06-05 05:37:26,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:37:26,647 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:37:26,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:26,653 INFO L225 Difference]: With dead ends: 926 [2021-06-05 05:37:26,654 INFO L226 Difference]: Without dead ends: 926 [2021-06-05 05:37:26,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:37:26,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-06-05 05:37:26,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 802. [2021-06-05 05:37:26,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.857677902621723) internal successors, (3090), 801 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:26,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 3090 transitions. [2021-06-05 05:37:26,680 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 3090 transitions. Word has length 26 [2021-06-05 05:37:26,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:26,680 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 3090 transitions. [2021-06-05 05:37:26,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:26,681 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 3090 transitions. [2021-06-05 05:37:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:37:26,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:26,683 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] [2021-06-05 05:37:26,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:26,907 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:26,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:26,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1942494820, now seen corresponding path program 1 times [2021-06-05 05:37:26,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:26,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644780014] [2021-06-05 05:37:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:26,990 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 05:37:26,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:26,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644780014] [2021-06-05 05:37:26,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644780014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:26,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373235689] [2021-06-05 05:37:26,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 05:37:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:27,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:37:27,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:27,127 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 05:37:27,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373235689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:27,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:27,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-06-05 05:37:27,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287498905] [2021-06-05 05:37:27,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:37:27,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:27,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:37:27,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:37:27,129 INFO L87 Difference]: Start difference. First operand 802 states and 3090 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:27,204 INFO L93 Difference]: Finished difference Result 1509 states and 5726 transitions. [2021-06-05 05:37:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:37:27,204 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:37:27,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:27,215 INFO L225 Difference]: With dead ends: 1509 [2021-06-05 05:37:27,216 INFO L226 Difference]: Without dead ends: 1509 [2021-06-05 05:37:27,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:37:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-06-05 05:37:27,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 953. [2021-06-05 05:37:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.889705882352941) internal successors, (3703), 952 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3703 transitions. [2021-06-05 05:37:27,251 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3703 transitions. Word has length 28 [2021-06-05 05:37:27,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:27,252 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 3703 transitions. [2021-06-05 05:37:27,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:27,253 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3703 transitions. [2021-06-05 05:37:27,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:37:27,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:27,257 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] [2021-06-05 05:37:27,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:27,472 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:27,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:27,472 INFO L82 PathProgramCache]: Analyzing trace with hash -210647880, now seen corresponding path program 2 times [2021-06-05 05:37:27,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:27,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578078780] [2021-06-05 05:37:27,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:27,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:27,521 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 05:37:27,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:27,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578078780] [2021-06-05 05:37:27,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578078780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:27,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191802365] [2021-06-05 05:37:27,522 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 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 05:37:27,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:37:27,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:27,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:37:27,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:37:27,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191802365] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:37:27,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 05:37:27,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-06-05 05:37:27,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393228065] [2021-06-05 05:37:27,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:37:27,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:27,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:37:27,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:37:27,663 INFO L87 Difference]: Start difference. First operand 953 states and 3703 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:27,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:27,711 INFO L93 Difference]: Finished difference Result 1136 states and 4368 transitions. [2021-06-05 05:37:27,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:37:27,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:37:27,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:27,721 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 05:37:27,721 INFO L226 Difference]: Without dead ends: 1088 [2021-06-05 05:37:27,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:37:27,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-05 05:37:27,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 937. [2021-06-05 05:37:27,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.8792735042735043) internal successors, (3631), 936 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3631 transitions. [2021-06-05 05:37:27,752 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3631 transitions. Word has length 28 [2021-06-05 05:37:27,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:27,752 INFO L482 AbstractCegarLoop]: Abstraction has 937 states and 3631 transitions. [2021-06-05 05:37:27,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3631 transitions. [2021-06-05 05:37:27,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:37:27,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:27,755 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 05:37:27,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:27,979 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:27,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:27,979 INFO L82 PathProgramCache]: Analyzing trace with hash 319966110, now seen corresponding path program 1 times [2021-06-05 05:37:27,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:27,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295292358] [2021-06-05 05:37:27,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:28,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:28,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295292358] [2021-06-05 05:37:28,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295292358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:28,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447762313] [2021-06-05 05:37:28,063 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 05:37:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:28,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 05:37:28,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:28,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447762313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:28,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:28,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 05:37:28,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355101599] [2021-06-05 05:37:28,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:37:28,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:28,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:37:28,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:37:28,252 INFO L87 Difference]: Start difference. First operand 937 states and 3631 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 05:37:28,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:28,379 INFO L93 Difference]: Finished difference Result 4025 states and 15417 transitions. [2021-06-05 05:37:28,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:37:28,380 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 05:37:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:28,405 INFO L225 Difference]: With dead ends: 4025 [2021-06-05 05:37:28,405 INFO L226 Difference]: Without dead ends: 3705 [2021-06-05 05:37:28,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:37:28,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2021-06-05 05:37:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 2630. [2021-06-05 05:37:28,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 3.9790794979079496) internal successors, (10461), 2629 states have internal predecessors, (10461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 10461 transitions. [2021-06-05 05:37:28,517 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 10461 transitions. Word has length 30 [2021-06-05 05:37:28,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:28,517 INFO L482 AbstractCegarLoop]: Abstraction has 2630 states and 10461 transitions. [2021-06-05 05:37:28,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 05:37:28,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 10461 transitions. [2021-06-05 05:37:28,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:37:28,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:28,527 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 05:37:28,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:28,750 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:28,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:28,751 INFO L82 PathProgramCache]: Analyzing trace with hash -874031780, now seen corresponding path program 2 times [2021-06-05 05:37:28,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:28,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969489892] [2021-06-05 05:37:28,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:28,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:28,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969489892] [2021-06-05 05:37:28,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969489892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:28,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014437473] [2021-06-05 05:37:28,844 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 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 05:37:28,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:37:28,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:28,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:37:28,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:29,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014437473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:29,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:29,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 05:37:29,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19773853] [2021-06-05 05:37:29,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:37:29,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:29,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:37:29,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:37:29,028 INFO L87 Difference]: Start difference. First operand 2630 states and 10461 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 05:37:29,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:29,323 INFO L93 Difference]: Finished difference Result 11823 states and 45853 transitions. [2021-06-05 05:37:29,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:37:29,324 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 32 [2021-06-05 05:37:29,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:29,381 INFO L225 Difference]: With dead ends: 11823 [2021-06-05 05:37:29,381 INFO L226 Difference]: Without dead ends: 11823 [2021-06-05 05:37:29,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:37:29,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11823 states. [2021-06-05 05:37:29,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11823 to 4060. [2021-06-05 05:37:29,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 4059 states have (on average 4.138950480413895) internal successors, (16800), 4059 states have internal predecessors, (16800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:29,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 16800 transitions. [2021-06-05 05:37:29,701 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 16800 transitions. Word has length 32 [2021-06-05 05:37:29,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:29,701 INFO L482 AbstractCegarLoop]: Abstraction has 4060 states and 16800 transitions. [2021-06-05 05:37:29,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 05:37:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 16800 transitions. [2021-06-05 05:37:29,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:37:29,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:29,715 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 05:37:29,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:29,938 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:29,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:29,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1773521824, now seen corresponding path program 3 times [2021-06-05 05:37:29,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:29,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940318517] [2021-06-05 05:37:29,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:30,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:30,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940318517] [2021-06-05 05:37:30,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940318517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:30,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940477321] [2021-06-05 05:37:30,029 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 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 05:37:30,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:37:30,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:30,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:37:30,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:37:30,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940477321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:30,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:30,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:37:30,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481034163] [2021-06-05 05:37:30,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:37:30,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:30,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:37:30,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:37:30,223 INFO L87 Difference]: Start difference. First operand 4060 states and 16800 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:31,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:31,030 INFO L93 Difference]: Finished difference Result 18640 states and 72700 transitions. [2021-06-05 05:37:31,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:37:31,034 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:37:31,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:31,172 INFO L225 Difference]: With dead ends: 18640 [2021-06-05 05:37:31,172 INFO L226 Difference]: Without dead ends: 17252 [2021-06-05 05:37:31,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 502.9ms TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:37:31,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17252 states. [2021-06-05 05:37:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17252 to 8566. [2021-06-05 05:37:31,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8566 states, 8565 states have (on average 4.2192644483362525) internal successors, (36138), 8565 states have internal predecessors, (36138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:31,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8566 states to 8566 states and 36138 transitions. [2021-06-05 05:37:31,504 INFO L78 Accepts]: Start accepts. Automaton has 8566 states and 36138 transitions. Word has length 32 [2021-06-05 05:37:31,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:31,504 INFO L482 AbstractCegarLoop]: Abstraction has 8566 states and 36138 transitions. [2021-06-05 05:37:31,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:31,504 INFO L276 IsEmpty]: Start isEmpty. Operand 8566 states and 36138 transitions. [2021-06-05 05:37:31,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:37:31,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:31,539 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 05:37:31,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 05:37:31,753 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:31,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:31,753 INFO L82 PathProgramCache]: Analyzing trace with hash -402067132, now seen corresponding path program 4 times [2021-06-05 05:37:31,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:31,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409236106] [2021-06-05 05:37:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:31,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:31,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409236106] [2021-06-05 05:37:31,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409236106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:31,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743347558] [2021-06-05 05:37:31,807 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 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 05:37:31,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:37:31,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:31,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:37:31,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:31,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743347558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:31,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:31,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 05:37:31,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037249386] [2021-06-05 05:37:31,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:37:31,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:31,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:37:31,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:37:31,928 INFO L87 Difference]: Start difference. First operand 8566 states and 36138 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:32,189 INFO L93 Difference]: Finished difference Result 13296 states and 52964 transitions. [2021-06-05 05:37:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:37:32,190 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:37:32,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:32,234 INFO L225 Difference]: With dead ends: 13296 [2021-06-05 05:37:32,235 INFO L226 Difference]: Without dead ends: 13128 [2021-06-05 05:37:32,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:37:32,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13128 states. [2021-06-05 05:37:32,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13128 to 8482. [2021-06-05 05:37:32,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8482 states, 8481 states have (on average 4.17851668435326) internal successors, (35438), 8481 states have internal predecessors, (35438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8482 states to 8482 states and 35438 transitions. [2021-06-05 05:37:32,582 INFO L78 Accepts]: Start accepts. Automaton has 8482 states and 35438 transitions. Word has length 32 [2021-06-05 05:37:32,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:32,582 INFO L482 AbstractCegarLoop]: Abstraction has 8482 states and 35438 transitions. [2021-06-05 05:37:32,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:32,583 INFO L276 IsEmpty]: Start isEmpty. Operand 8482 states and 35438 transitions. [2021-06-05 05:37:32,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:37:32,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:32,609 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 05:37:32,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:32,814 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:32,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:32,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1929237264, now seen corresponding path program 5 times [2021-06-05 05:37:32,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:32,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920110094] [2021-06-05 05:37:32,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:32,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:32,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920110094] [2021-06-05 05:37:32,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920110094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:32,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140470034] [2021-06-05 05:37:32,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:37:32,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:37:32,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:32,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:37:32,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:33,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140470034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:33,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:33,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 05:37:33,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988791957] [2021-06-05 05:37:33,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:37:33,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:33,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:37:33,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:37:33,040 INFO L87 Difference]: Start difference. First operand 8482 states and 35438 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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 05:37:33,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:33,305 INFO L93 Difference]: Finished difference Result 17125 states and 69725 transitions. [2021-06-05 05:37:33,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:37:33,305 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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 32 [2021-06-05 05:37:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:33,349 INFO L225 Difference]: With dead ends: 17125 [2021-06-05 05:37:33,350 INFO L226 Difference]: Without dead ends: 17125 [2021-06-05 05:37:33,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:37:33,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17125 states. [2021-06-05 05:37:33,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17125 to 10475. [2021-06-05 05:37:33,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10475 states, 10474 states have (on average 4.289765132709567) internal successors, (44931), 10474 states have internal predecessors, (44931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:33,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10475 states to 10475 states and 44931 transitions. [2021-06-05 05:37:33,768 INFO L78 Accepts]: Start accepts. Automaton has 10475 states and 44931 transitions. Word has length 32 [2021-06-05 05:37:33,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:33,768 INFO L482 AbstractCegarLoop]: Abstraction has 10475 states and 44931 transitions. [2021-06-05 05:37:33,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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 05:37:33,769 INFO L276 IsEmpty]: Start isEmpty. Operand 10475 states and 44931 transitions. [2021-06-05 05:37:33,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:37:33,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:33,797 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 05:37:34,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:34,020 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:34,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:34,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1951270200, now seen corresponding path program 6 times [2021-06-05 05:37:34,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:34,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698319339] [2021-06-05 05:37:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:34,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:34,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698319339] [2021-06-05 05:37:34,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698319339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:34,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57157649] [2021-06-05 05:37:34,085 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 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 05:37:34,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:37:34,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:34,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:37:34,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:37:34,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57157649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:34,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:34,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 05:37:34,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764058867] [2021-06-05 05:37:34,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:37:34,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:34,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:37:34,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:37:34,209 INFO L87 Difference]: Start difference. First operand 10475 states and 44931 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:34,370 INFO L93 Difference]: Finished difference Result 16571 states and 66710 transitions. [2021-06-05 05:37:34,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:37:34,371 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:37:34,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:34,527 INFO L225 Difference]: With dead ends: 16571 [2021-06-05 05:37:34,527 INFO L226 Difference]: Without dead ends: 16190 [2021-06-05 05:37:34,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:37:34,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16190 states. [2021-06-05 05:37:34,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16190 to 10209. [2021-06-05 05:37:34,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10209 states, 10208 states have (on average 4.278800940438871) internal successors, (43678), 10208 states have internal predecessors, (43678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10209 states to 10209 states and 43678 transitions. [2021-06-05 05:37:34,905 INFO L78 Accepts]: Start accepts. Automaton has 10209 states and 43678 transitions. Word has length 32 [2021-06-05 05:37:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:34,905 INFO L482 AbstractCegarLoop]: Abstraction has 10209 states and 43678 transitions. [2021-06-05 05:37:34,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 10209 states and 43678 transitions. [2021-06-05 05:37:34,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:37:34,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:34,934 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 05:37:35,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 05:37:35,157 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:35,158 INFO L82 PathProgramCache]: Analyzing trace with hash -722377608, now seen corresponding path program 7 times [2021-06-05 05:37:35,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:35,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776533965] [2021-06-05 05:37:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:35,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:35,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776533965] [2021-06-05 05:37:35,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776533965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:35,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080084158] [2021-06-05 05:37:35,222 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 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 05:37:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:35,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:37:35,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:35,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080084158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:35,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:35,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:37:35,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192882478] [2021-06-05 05:37:35,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:37:35,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:35,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:37:35,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:37:35,355 INFO L87 Difference]: Start difference. First operand 10209 states and 43678 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:35,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:35,744 INFO L93 Difference]: Finished difference Result 19431 states and 81047 transitions. [2021-06-05 05:37:35,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:37:35,745 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:37:35,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:35,806 INFO L225 Difference]: With dead ends: 19431 [2021-06-05 05:37:35,807 INFO L226 Difference]: Without dead ends: 19035 [2021-06-05 05:37:35,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:37:35,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19035 states. [2021-06-05 05:37:36,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19035 to 13737. [2021-06-05 05:37:36,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13737 states, 13736 states have (on average 4.360439720442632) internal successors, (59895), 13736 states have internal predecessors, (59895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13737 states to 13737 states and 59895 transitions. [2021-06-05 05:37:36,324 INFO L78 Accepts]: Start accepts. Automaton has 13737 states and 59895 transitions. Word has length 32 [2021-06-05 05:37:36,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:36,324 INFO L482 AbstractCegarLoop]: Abstraction has 13737 states and 59895 transitions. [2021-06-05 05:37:36,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:36,324 INFO L276 IsEmpty]: Start isEmpty. Operand 13737 states and 59895 transitions. [2021-06-05 05:37:36,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:37:36,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:36,363 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 05:37:36,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 05:37:36,577 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:36,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:36,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1698964616, now seen corresponding path program 8 times [2021-06-05 05:37:36,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:36,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872406625] [2021-06-05 05:37:36,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:36,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:36,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872406625] [2021-06-05 05:37:36,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872406625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:36,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735183547] [2021-06-05 05:37:36,773 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 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 05:37:36,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:37:36,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:36,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:37:36,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:36,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735183547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:36,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:36,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:37:36,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529438541] [2021-06-05 05:37:36,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:37:36,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:36,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:37:36,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:37:36,921 INFO L87 Difference]: Start difference. First operand 13737 states and 59895 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:38,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:38,111 INFO L93 Difference]: Finished difference Result 59639 states and 243328 transitions. [2021-06-05 05:37:38,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:37:38,112 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:37:38,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:38,487 INFO L225 Difference]: With dead ends: 59639 [2021-06-05 05:37:38,487 INFO L226 Difference]: Without dead ends: 58849 [2021-06-05 05:37:38,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 617.0ms TimeCoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:37:38,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58849 states. [2021-06-05 05:37:39,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58849 to 27180. [2021-06-05 05:37:39,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27180 states, 27179 states have (on average 4.433606828801648) internal successors, (120501), 27179 states have internal predecessors, (120501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27180 states to 27180 states and 120501 transitions. [2021-06-05 05:37:39,645 INFO L78 Accepts]: Start accepts. Automaton has 27180 states and 120501 transitions. Word has length 32 [2021-06-05 05:37:39,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:39,645 INFO L482 AbstractCegarLoop]: Abstraction has 27180 states and 120501 transitions. [2021-06-05 05:37:39,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:39,645 INFO L276 IsEmpty]: Start isEmpty. Operand 27180 states and 120501 transitions. [2021-06-05 05:37:39,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:37:39,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:39,705 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 05:37:39,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 05:37:39,905 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:39,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:39,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1473506436, now seen corresponding path program 9 times [2021-06-05 05:37:39,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:39,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104950615] [2021-06-05 05:37:39,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:37:39,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:39,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104950615] [2021-06-05 05:37:39,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104950615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:39,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769580752] [2021-06-05 05:37:39,973 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 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 05:37:40,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:37:40,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:40,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:37:40,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:37:40,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769580752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:40,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:40,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-06-05 05:37:40,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694011481] [2021-06-05 05:37:40,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:37:40,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:40,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:37:40,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:37:40,140 INFO L87 Difference]: Start difference. First operand 27180 states and 120501 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 05:37:40,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:40,703 INFO L93 Difference]: Finished difference Result 31277 states and 134903 transitions. [2021-06-05 05:37:40,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:37:40,705 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 32 [2021-06-05 05:37:40,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:40,797 INFO L225 Difference]: With dead ends: 31277 [2021-06-05 05:37:40,797 INFO L226 Difference]: Without dead ends: 30802 [2021-06-05 05:37:40,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:37:40,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30802 states. [2021-06-05 05:37:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30802 to 25038. [2021-06-05 05:37:41,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25038 states, 25037 states have (on average 4.435155969165635) internal successors, (111043), 25037 states have internal predecessors, (111043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25038 states to 25038 states and 111043 transitions. [2021-06-05 05:37:41,532 INFO L78 Accepts]: Start accepts. Automaton has 25038 states and 111043 transitions. Word has length 32 [2021-06-05 05:37:41,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:41,532 INFO L482 AbstractCegarLoop]: Abstraction has 25038 states and 111043 transitions. [2021-06-05 05:37:41,532 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 05:37:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 25038 states and 111043 transitions. [2021-06-05 05:37:41,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:37:41,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:41,588 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 05:37:41,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:41,805 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:41,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:41,805 INFO L82 PathProgramCache]: Analyzing trace with hash -963056650, now seen corresponding path program 10 times [2021-06-05 05:37:41,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:41,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40977136] [2021-06-05 05:37:41,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:37:41,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:41,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40977136] [2021-06-05 05:37:41,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40977136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:41,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541540492] [2021-06-05 05:37:41,853 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 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 05:37:41,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:37:41,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:41,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:37:41,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:37:41,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541540492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:41,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:41,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 05:37:41,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433079118] [2021-06-05 05:37:41,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:37:41,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:41,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:37:41,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:37:41,994 INFO L87 Difference]: Start difference. First operand 25038 states and 111043 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:43,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:43,025 INFO L93 Difference]: Finished difference Result 54817 states and 230789 transitions. [2021-06-05 05:37:43,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:37:43,025 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 05:37:43,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:43,193 INFO L225 Difference]: With dead ends: 54817 [2021-06-05 05:37:43,194 INFO L226 Difference]: Without dead ends: 53957 [2021-06-05 05:37:43,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 386.6ms TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:37:43,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53957 states. [2021-06-05 05:37:44,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53957 to 33088. [2021-06-05 05:37:44,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33088 states, 33087 states have (on average 4.473599903285278) internal successors, (148018), 33087 states have internal predecessors, (148018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:44,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33088 states to 33088 states and 148018 transitions. [2021-06-05 05:37:44,500 INFO L78 Accepts]: Start accepts. Automaton has 33088 states and 148018 transitions. Word has length 34 [2021-06-05 05:37:44,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:44,500 INFO L482 AbstractCegarLoop]: Abstraction has 33088 states and 148018 transitions. [2021-06-05 05:37:44,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:44,500 INFO L276 IsEmpty]: Start isEmpty. Operand 33088 states and 148018 transitions. [2021-06-05 05:37:44,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:37:44,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:44,568 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 05:37:44,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:44,771 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:44,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:44,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1490817678, now seen corresponding path program 11 times [2021-06-05 05:37:44,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:44,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457388270] [2021-06-05 05:37:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:37:44,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:44,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457388270] [2021-06-05 05:37:44,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457388270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:44,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489498560] [2021-06-05 05:37:44,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:37:44,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:37:44,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:44,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:37:44,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:37:44,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489498560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:44,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:44,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:37:44,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530755532] [2021-06-05 05:37:44,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:37:44,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:44,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:37:44,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:37:44,942 INFO L87 Difference]: Start difference. First operand 33088 states and 148018 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:46,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:46,036 INFO L93 Difference]: Finished difference Result 59653 states and 250894 transitions. [2021-06-05 05:37:46,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:37:46,037 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 05:37:46,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:46,231 INFO L225 Difference]: With dead ends: 59653 [2021-06-05 05:37:46,231 INFO L226 Difference]: Without dead ends: 58480 [2021-06-05 05:37:46,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 376.6ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:37:46,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58480 states. [2021-06-05 05:37:47,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58480 to 38451. [2021-06-05 05:37:47,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38451 states, 38450 states have (on average 4.454200260078023) internal successors, (171264), 38450 states have internal predecessors, (171264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38451 states to 38451 states and 171264 transitions. [2021-06-05 05:37:47,690 INFO L78 Accepts]: Start accepts. Automaton has 38451 states and 171264 transitions. Word has length 34 [2021-06-05 05:37:47,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:47,691 INFO L482 AbstractCegarLoop]: Abstraction has 38451 states and 171264 transitions. [2021-06-05 05:37:47,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 38451 states and 171264 transitions. [2021-06-05 05:37:47,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:37:47,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:47,785 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] [2021-06-05 05:37:47,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:47,985 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:47,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:47,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1889373340, now seen corresponding path program 12 times [2021-06-05 05:37:47,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:47,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111418906] [2021-06-05 05:37:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 05:37:48,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:48,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111418906] [2021-06-05 05:37:48,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111418906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:48,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205358056] [2021-06-05 05:37:48,059 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 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 05:37:48,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:37:48,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:48,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:37:48,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:37:48,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205358056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:48,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:48,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-06-05 05:37:48,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409648221] [2021-06-05 05:37:48,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:37:48,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:48,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:37:48,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:37:48,209 INFO L87 Difference]: Start difference. First operand 38451 states and 171264 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:49,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:49,537 INFO L93 Difference]: Finished difference Result 101501 states and 447345 transitions. [2021-06-05 05:37:49,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:37:49,537 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:37:49,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:49,935 INFO L225 Difference]: With dead ends: 101501 [2021-06-05 05:37:49,935 INFO L226 Difference]: Without dead ends: 100925 [2021-06-05 05:37:49,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 223.4ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:37:50,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100925 states. [2021-06-05 05:37:51,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100925 to 64709. [2021-06-05 05:37:51,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64709 states, 64708 states have (on average 4.539284168881745) internal successors, (293728), 64708 states have internal predecessors, (293728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:52,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64709 states to 64709 states and 293728 transitions. [2021-06-05 05:37:52,049 INFO L78 Accepts]: Start accepts. Automaton has 64709 states and 293728 transitions. Word has length 36 [2021-06-05 05:37:52,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:52,049 INFO L482 AbstractCegarLoop]: Abstraction has 64709 states and 293728 transitions. [2021-06-05 05:37:52,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:52,049 INFO L276 IsEmpty]: Start isEmpty. Operand 64709 states and 293728 transitions. [2021-06-05 05:37:52,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:37:52,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:52,207 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] [2021-06-05 05:37:52,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 05:37:52,409 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:52,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:52,409 INFO L82 PathProgramCache]: Analyzing trace with hash -644790412, now seen corresponding path program 13 times [2021-06-05 05:37:52,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:52,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482654420] [2021-06-05 05:37:52,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:37:52,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:52,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482654420] [2021-06-05 05:37:52,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482654420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:52,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087986899] [2021-06-05 05:37:52,461 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 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 05:37:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:52,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:37:52,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:37:52,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087986899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:52,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:52,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 05:37:52,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967106202] [2021-06-05 05:37:52,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:37:52,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:52,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:37:52,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:37:52,600 INFO L87 Difference]: Start difference. First operand 64709 states and 293728 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 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 05:37:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:56,920 INFO L93 Difference]: Finished difference Result 345279 states and 1557613 transitions. [2021-06-05 05:37:56,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:37:56,921 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 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 36 [2021-06-05 05:37:56,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:59,265 INFO L225 Difference]: With dead ends: 345279 [2021-06-05 05:37:59,265 INFO L226 Difference]: Without dead ends: 340111 [2021-06-05 05:37:59,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 509.4ms TimeCoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:37:59,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340111 states. [2021-06-05 05:38:06,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340111 to 209327. [2021-06-05 05:38:06,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209327 states, 209326 states have (on average 4.720412180044524) internal successors, (988105), 209326 states have internal predecessors, (988105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209327 states to 209327 states and 988105 transitions. [2021-06-05 05:38:08,929 INFO L78 Accepts]: Start accepts. Automaton has 209327 states and 988105 transitions. Word has length 36 [2021-06-05 05:38:08,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:08,929 INFO L482 AbstractCegarLoop]: Abstraction has 209327 states and 988105 transitions. [2021-06-05 05:38:08,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 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 05:38:08,930 INFO L276 IsEmpty]: Start isEmpty. Operand 209327 states and 988105 transitions. [2021-06-05 05:38:09,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:38:09,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:09,552 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] [2021-06-05 05:38:09,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 05:38:09,753 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:09,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:09,753 INFO L82 PathProgramCache]: Analyzing trace with hash -854765258, now seen corresponding path program 14 times [2021-06-05 05:38:09,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:09,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374061990] [2021-06-05 05:38:09,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:38:09,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:09,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374061990] [2021-06-05 05:38:09,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374061990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:09,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234471434] [2021-06-05 05:38:09,813 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 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 05:38:09,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:09,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:09,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:38:09,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:38:09,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234471434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:09,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:09,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 05:38:09,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650096021] [2021-06-05 05:38:09,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:38:09,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:09,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:38:09,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:38:09,941 INFO L87 Difference]: Start difference. First operand 209327 states and 988105 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 05:38:12,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:12,136 INFO L93 Difference]: Finished difference Result 231776 states and 1069827 transitions. [2021-06-05 05:38:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:38:12,136 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 36 [2021-06-05 05:38:12,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:13,838 INFO L225 Difference]: With dead ends: 231776 [2021-06-05 05:38:13,839 INFO L226 Difference]: Without dead ends: 229312 [2021-06-05 05:38:13,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:38:14,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229312 states. [2021-06-05 05:38:19,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229312 to 204036. [2021-06-05 05:38:20,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204036 states, 204035 states have (on average 4.715220427867767) internal successors, (962070), 204035 states have internal predecessors, (962070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:21,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204036 states to 204036 states and 962070 transitions. [2021-06-05 05:38:21,155 INFO L78 Accepts]: Start accepts. Automaton has 204036 states and 962070 transitions. Word has length 36 [2021-06-05 05:38:21,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:21,155 INFO L482 AbstractCegarLoop]: Abstraction has 204036 states and 962070 transitions. [2021-06-05 05:38:21,155 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 05:38:21,155 INFO L276 IsEmpty]: Start isEmpty. Operand 204036 states and 962070 transitions. [2021-06-05 05:38:22,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 05:38:22,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:22,604 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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] [2021-06-05 05:38:22,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 05:38:22,805 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:22,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:22,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1958295198, now seen corresponding path program 15 times [2021-06-05 05:38:22,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:22,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886925919] [2021-06-05 05:38:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:38:22,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:22,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886925919] [2021-06-05 05:38:22,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886925919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:22,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148417473] [2021-06-05 05:38:22,886 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 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 05:38:22,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:38:22,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:22,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:38:22,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:38:23,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148417473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:23,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:23,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 05:38:23,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520003119] [2021-06-05 05:38:23,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:38:23,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:23,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:38:23,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:38:23,037 INFO L87 Difference]: Start difference. First operand 204036 states and 962070 transitions. Second operand has 9 states, 9 states have (on average 5.0) 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 05:38:28,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:28,607 INFO L93 Difference]: Finished difference Result 502202 states and 2377356 transitions. [2021-06-05 05:38:28,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:38:28,608 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) 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 38 [2021-06-05 05:38:28,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:31,064 INFO L225 Difference]: With dead ends: 502202 [2021-06-05 05:38:31,065 INFO L226 Difference]: Without dead ends: 498334 [2021-06-05 05:38:31,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:38:32,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498334 states. [2021-06-05 05:38:42,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498334 to 386864. [2021-06-05 05:38:43,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386864 states, 386863 states have (on average 4.774356813652378) internal successors, (1847022), 386863 states have internal predecessors, (1847022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:48,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386864 states to 386864 states and 1847022 transitions. [2021-06-05 05:38:48,882 INFO L78 Accepts]: Start accepts. Automaton has 386864 states and 1847022 transitions. Word has length 38 [2021-06-05 05:38:48,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:48,882 INFO L482 AbstractCegarLoop]: Abstraction has 386864 states and 1847022 transitions. [2021-06-05 05:38:48,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) 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 05:38:48,882 INFO L276 IsEmpty]: Start isEmpty. Operand 386864 states and 1847022 transitions. [2021-06-05 05:38:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:38:51,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:51,044 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-05 05:38:51,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 05:38:51,261 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:51,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:51,261 INFO L82 PathProgramCache]: Analyzing trace with hash -79715748, now seen corresponding path program 16 times [2021-06-05 05:38:51,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:51,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517573050] [2021-06-05 05:38:51,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:38:51,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:51,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517573050] [2021-06-05 05:38:51,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517573050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:51,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589048920] [2021-06-05 05:38:51,403 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 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 05:38:51,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:38:51,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:51,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:38:51,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:38:52,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589048920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:52,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:52,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-05 05:38:52,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234510863] [2021-06-05 05:38:52,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:38:52,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:52,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:38:52,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:38:52,387 INFO L87 Difference]: Start difference. First operand 386864 states and 1847022 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 05:39:05,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:05,914 INFO L93 Difference]: Finished difference Result 1120732 states and 5108769 transitions. [2021-06-05 05:39:05,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:39:05,915 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 40 [2021-06-05 05:39:05,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:13,700 INFO L225 Difference]: With dead ends: 1120732 [2021-06-05 05:39:13,701 INFO L226 Difference]: Without dead ends: 1114512 [2021-06-05 05:39:13,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1064.6ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:39:16,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114512 states. [2021-06-05 05:39:39,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114512 to 448533. [2021-06-05 05:39:40,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448533 states, 448532 states have (on average 4.7567286169102765) internal successors, (2133545), 448532 states have internal predecessors, (2133545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448533 states to 448533 states and 2133545 transitions. [2021-06-05 05:39:46,245 INFO L78 Accepts]: Start accepts. Automaton has 448533 states and 2133545 transitions. Word has length 40 [2021-06-05 05:39:46,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:46,245 INFO L482 AbstractCegarLoop]: Abstraction has 448533 states and 2133545 transitions. [2021-06-05 05:39:46,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 05:39:46,245 INFO L276 IsEmpty]: Start isEmpty. Operand 448533 states and 2133545 transitions. [2021-06-05 05:39:49,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:39:49,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:49,915 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-05 05:39:50,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 05:39:50,133 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:50,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:50,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1291496032, now seen corresponding path program 17 times [2021-06-05 05:39:50,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:50,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20880585] [2021-06-05 05:39:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:39:50,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:50,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20880585] [2021-06-05 05:39:50,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20880585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:50,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524863629] [2021-06-05 05:39:50,236 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:50,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:39:50,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:50,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:39:50,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:39:50,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524863629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:50,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:50,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 05:39:50,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201961674] [2021-06-05 05:39:50,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:39:50,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:50,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:39:50,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:39:50,517 INFO L87 Difference]: Start difference. First operand 448533 states and 2133545 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:15,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:15,541 INFO L93 Difference]: Finished difference Result 1565237 states and 7251935 transitions. [2021-06-05 05:40:15,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 05:40:15,541 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:40:15,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:33,098 INFO L225 Difference]: With dead ends: 1565237 [2021-06-05 05:40:33,098 INFO L226 Difference]: Without dead ends: 1521056 [2021-06-05 05:40:33,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 1172.6ms TimeCoverageRelationStatistics Valid=1278, Invalid=4574, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:40:35,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521056 states. [2021-06-05 05:41:13,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521056 to 810028. [2021-06-05 05:41:15,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810028 states, 810027 states have (on average 4.736152004809716) internal successors, (3836411), 810027 states have internal predecessors, (3836411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810028 states to 810028 states and 3836411 transitions. [2021-06-05 05:41:26,729 INFO L78 Accepts]: Start accepts. Automaton has 810028 states and 3836411 transitions. Word has length 40 [2021-06-05 05:41:26,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:26,729 INFO L482 AbstractCegarLoop]: Abstraction has 810028 states and 3836411 transitions. [2021-06-05 05:41:26,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:26,729 INFO L276 IsEmpty]: Start isEmpty. Operand 810028 states and 3836411 transitions. [2021-06-05 05:41:33,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:41:33,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:33,522 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-05 05:41:33,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:33,757 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:33,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:33,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1485289540, now seen corresponding path program 18 times [2021-06-05 05:41:33,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:33,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029318997] [2021-06-05 05:41:33,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:41:33,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:33,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029318997] [2021-06-05 05:41:33,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029318997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:33,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527227802] [2021-06-05 05:41:33,858 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:33,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:41:33,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:33,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:41:33,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 05:41:34,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527227802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:34,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:34,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 05:41:34,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966164051] [2021-06-05 05:41:34,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:41:34,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:34,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:41:34,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:41:34,141 INFO L87 Difference]: Start difference. First operand 810028 states and 3836411 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)