/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:46:52,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:46:52,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:46:52,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:46:52,647 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 [2021-07-09 17:46:52,683 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:46:52,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:46:52,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:46:52,684 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:46:52,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:46:52,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:46:52,687 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:46:52,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:46:52,687 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:46:52,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:46:52,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:46:52,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:46:52,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:46:52,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:46:52,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:46:52,689 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:46:52,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:46:52,689 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:46:52,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:46:52,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:46:52,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:46:52,689 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:46:52,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:46:52,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:46:52,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:46:52,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:46:52,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:46:52,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:46:52,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:46:52,700 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:46:52,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:46:52,700 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:46:53,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:46:53,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:46:53,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:46:53,042 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:46:53,043 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:46:53,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl [2021-07-09 17:46:53,043 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl' [2021-07-09 17:46:53,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:46:53,074 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:46:53,075 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:46:53,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:46:53,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:46:53,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:53" (1/1) ... [2021-07-09 17:46:53,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:53" (1/1) ... [2021-07-09 17:46:53,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:46:53,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:46:53,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:46:53,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:46:53,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:53" (1/1) ... [2021-07-09 17:46:53,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:53" (1/1) ... [2021-07-09 17:46:53,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:53" (1/1) ... [2021-07-09 17:46:53,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:53" (1/1) ... [2021-07-09 17:46:53,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:53" (1/1) ... [2021-07-09 17:46:53,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:53" (1/1) ... [2021-07-09 17:46:53,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:53" (1/1) ... [2021-07-09 17:46:53,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:46:53,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:46:53,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:46:53,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:46:53,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:53" (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 [2021-07-09 17:46:53,189 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:46:53,189 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:46:53,190 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:46:53,190 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:46:53,190 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:46:53,190 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:46:53,190 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:46:53,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:46:53,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:46:53,192 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:46:53,354 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:46:53,354 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:46:53,356 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:46:53 BoogieIcfgContainer [2021-07-09 17:46:53,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:46:53,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:46:53,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:46:53,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:46:53,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:46:53" (1/2) ... [2021-07-09 17:46:53,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0e5b2 and model type misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:46:53, skipping insertion in model container [2021-07-09 17:46:53,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:46:53" (2/2) ... [2021-07-09 17:46:53,362 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-2.wvr.bpl [2021-07-09 17:46:53,366 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:46:53,367 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:46:53,367 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:46:53,367 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:46:53,394 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 17:46:53,413 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:46:53,429 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:46:53,429 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:46:53,429 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:46:53,430 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:46:53,430 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:46:53,430 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:46:53,430 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:46:53,430 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:46:53,438 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 29 transitions, 74 flow [2021-07-09 17:46:53,455 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 85 states, 84 states have (on average 2.1785714285714284) internal successors, (183), 84 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 84 states have (on average 2.1785714285714284) internal successors, (183), 84 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:53,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:46:53,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:53,465 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:53,466 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:53,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:53,480 INFO L82 PathProgramCache]: Analyzing trace with hash -523912972, now seen corresponding path program 1 times [2021-07-09 17:46:53,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:53,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996025933] [2021-07-09 17:46:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:53,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:53,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996025933] [2021-07-09 17:46:53,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996025933] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:46:53,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:46:53,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:46:53,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372022850] [2021-07-09 17:46:53,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:46:53,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:53,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:46:53,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:46:53,629 INFO L87 Difference]: Start difference. First operand has 85 states, 84 states have (on average 2.1785714285714284) internal successors, (183), 84 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:53,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:53,665 INFO L93 Difference]: Finished difference Result 134 states and 294 transitions. [2021-07-09 17:46:53,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:46:53,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-09 17:46:53,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:53,675 INFO L225 Difference]: With dead ends: 134 [2021-07-09 17:46:53,675 INFO L226 Difference]: Without dead ends: 127 [2021-07-09 17:46:53,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:46:53,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-09 17:46:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 94. [2021-07-09 17:46:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.161290322580645) internal successors, (201), 93 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 201 transitions. [2021-07-09 17:46:53,724 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 201 transitions. Word has length 11 [2021-07-09 17:46:53,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:53,724 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 201 transitions. [2021-07-09 17:46:53,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:53,724 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 201 transitions. [2021-07-09 17:46:53,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:46:53,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:53,726 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:53,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:46:53,726 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:53,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:53,727 INFO L82 PathProgramCache]: Analyzing trace with hash -903627706, now seen corresponding path program 1 times [2021-07-09 17:46:53,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:53,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064143108] [2021-07-09 17:46:53,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:53,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:53,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064143108] [2021-07-09 17:46:53,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064143108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:53,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695857338] [2021-07-09 17:46:53,767 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 [2021-07-09 17:46:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:53,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 17:46:53,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:53,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695857338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:53,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:53,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-09 17:46:53,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130459672] [2021-07-09 17:46:53,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:46:53,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:53,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:46:53,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:46:53,932 INFO L87 Difference]: Start difference. First operand 94 states and 201 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:54,010 INFO L93 Difference]: Finished difference Result 169 states and 356 transitions. [2021-07-09 17:46:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:46:54,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:46:54,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:54,016 INFO L225 Difference]: With dead ends: 169 [2021-07-09 17:46:54,016 INFO L226 Difference]: Without dead ends: 169 [2021-07-09 17:46:54,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:46:54,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-09 17:46:54,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-07-09 17:46:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.185567010309278) internal successors, (212), 97 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:54,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2021-07-09 17:46:54,034 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 16 [2021-07-09 17:46:54,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:54,034 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2021-07-09 17:46:54,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:54,035 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2021-07-09 17:46:54,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:46:54,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:54,040 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:54,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 17:46:54,265 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:54,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:54,265 INFO L82 PathProgramCache]: Analyzing trace with hash -965799907, now seen corresponding path program 1 times [2021-07-09 17:46:54,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:54,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916501993] [2021-07-09 17:46:54,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:54,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:54,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916501993] [2021-07-09 17:46:54,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916501993] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:46:54,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:46:54,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:46:54,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077367819] [2021-07-09 17:46:54,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:46:54,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:54,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:46:54,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:46:54,313 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:54,382 INFO L93 Difference]: Finished difference Result 188 states and 400 transitions. [2021-07-09 17:46:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:46:54,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:46:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:54,386 INFO L225 Difference]: With dead ends: 188 [2021-07-09 17:46:54,389 INFO L226 Difference]: Without dead ends: 183 [2021-07-09 17:46:54,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:46:54,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-09 17:46:54,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 122. [2021-07-09 17:46:54,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1735537190082646) internal successors, (263), 121 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 263 transitions. [2021-07-09 17:46:54,401 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 263 transitions. Word has length 16 [2021-07-09 17:46:54,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:54,401 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 263 transitions. [2021-07-09 17:46:54,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:54,401 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 263 transitions. [2021-07-09 17:46:54,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:46:54,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:54,402 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:54,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:46:54,402 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:54,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:54,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1768119819, now seen corresponding path program 2 times [2021-07-09 17:46:54,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:54,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398729924] [2021-07-09 17:46:54,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:54,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:54,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398729924] [2021-07-09 17:46:54,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398729924] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:46:54,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:46:54,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:46:54,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887798190] [2021-07-09 17:46:54,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:46:54,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:54,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:46:54,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:46:54,449 INFO L87 Difference]: Start difference. First operand 122 states and 263 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:54,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:54,484 INFO L93 Difference]: Finished difference Result 156 states and 342 transitions. [2021-07-09 17:46:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:46:54,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:46:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:54,486 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:46:54,486 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:46:54,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:46:54,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:46:54,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 104. [2021-07-09 17:46:54,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.174757281553398) internal successors, (224), 103 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 224 transitions. [2021-07-09 17:46:54,499 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 224 transitions. Word has length 16 [2021-07-09 17:46:54,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:54,500 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 224 transitions. [2021-07-09 17:46:54,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:54,500 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 224 transitions. [2021-07-09 17:46:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:46:54,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:54,501 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:54,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:46:54,501 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:54,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1004932738, now seen corresponding path program 2 times [2021-07-09 17:46:54,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:54,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917986608] [2021-07-09 17:46:54,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:54,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:54,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917986608] [2021-07-09 17:46:54,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917986608] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:46:54,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:46:54,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:46:54,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526627441] [2021-07-09 17:46:54,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:46:54,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:54,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:46:54,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:46:54,588 INFO L87 Difference]: Start difference. First operand 104 states and 224 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:54,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:54,633 INFO L93 Difference]: Finished difference Result 156 states and 340 transitions. [2021-07-09 17:46:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:46:54,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:46:54,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:54,635 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:46:54,635 INFO L226 Difference]: Without dead ends: 154 [2021-07-09 17:46:54,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:46:54,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-09 17:46:54,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 104. [2021-07-09 17:46:54,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:54,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 223 transitions. [2021-07-09 17:46:54,649 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 223 transitions. Word has length 16 [2021-07-09 17:46:54,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:54,649 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 223 transitions. [2021-07-09 17:46:54,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:54,649 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 223 transitions. [2021-07-09 17:46:54,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:46:54,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:54,650 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:54,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:46:54,651 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:54,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:54,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1303883765, now seen corresponding path program 1 times [2021-07-09 17:46:54,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:54,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072978323] [2021-07-09 17:46:54,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:54,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:54,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072978323] [2021-07-09 17:46:54,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072978323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:54,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441086588] [2021-07-09 17:46:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:54,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:46:54,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:54,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441086588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:54,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:54,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-07-09 17:46:54,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135367128] [2021-07-09 17:46:54,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:46:54,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:54,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:46:54,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:46:54,891 INFO L87 Difference]: Start difference. First operand 104 states and 223 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:55,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:55,037 INFO L93 Difference]: Finished difference Result 226 states and 505 transitions. [2021-07-09 17:46:55,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:46:55,037 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:46:55,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:55,041 INFO L225 Difference]: With dead ends: 226 [2021-07-09 17:46:55,042 INFO L226 Difference]: Without dead ends: 226 [2021-07-09 17:46:55,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:46:55,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-09 17:46:55,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 164. [2021-07-09 17:46:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.2024539877300615) internal successors, (359), 163 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 359 transitions. [2021-07-09 17:46:55,064 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 359 transitions. Word has length 21 [2021-07-09 17:46:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:55,064 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 359 transitions. [2021-07-09 17:46:55,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 359 transitions. [2021-07-09 17:46:55,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:46:55,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:55,065 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:55,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:55,289 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:55,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:55,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1315462331, now seen corresponding path program 2 times [2021-07-09 17:46:55,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:55,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824543564] [2021-07-09 17:46:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:55,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:55,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824543564] [2021-07-09 17:46:55,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824543564] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:46:55,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:46:55,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:46:55,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938919194] [2021-07-09 17:46:55,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:46:55,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:55,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:46:55,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:46:55,316 INFO L87 Difference]: Start difference. First operand 164 states and 359 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:55,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:55,329 INFO L93 Difference]: Finished difference Result 266 states and 560 transitions. [2021-07-09 17:46:55,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:46:55,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:46:55,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:55,331 INFO L225 Difference]: With dead ends: 266 [2021-07-09 17:46:55,331 INFO L226 Difference]: Without dead ends: 266 [2021-07-09 17:46:55,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:46:55,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-07-09 17:46:55,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 234. [2021-07-09 17:46:55,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.171673819742489) internal successors, (506), 233 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:55,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 506 transitions. [2021-07-09 17:46:55,341 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 506 transitions. Word has length 26 [2021-07-09 17:46:55,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:55,341 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 506 transitions. [2021-07-09 17:46:55,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:55,341 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 506 transitions. [2021-07-09 17:46:55,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:46:55,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:55,343 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:55,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 17:46:55,343 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:55,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:55,344 INFO L82 PathProgramCache]: Analyzing trace with hash -2136729445, now seen corresponding path program 1 times [2021-07-09 17:46:55,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:55,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841562036] [2021-07-09 17:46:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:55,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:55,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841562036] [2021-07-09 17:46:55,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841562036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:55,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932309171] [2021-07-09 17:46:55,417 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 [2021-07-09 17:46:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:55,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:46:55,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:55,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932309171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:55,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:55,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:46:55,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143978288] [2021-07-09 17:46:55,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:46:55,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:55,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:46:55,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:46:55,508 INFO L87 Difference]: Start difference. First operand 234 states and 506 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:55,571 INFO L93 Difference]: Finished difference Result 562 states and 1200 transitions. [2021-07-09 17:46:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:46:55,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:46:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:55,574 INFO L225 Difference]: With dead ends: 562 [2021-07-09 17:46:55,574 INFO L226 Difference]: Without dead ends: 562 [2021-07-09 17:46:55,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:46:55,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-07-09 17:46:55,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 438. [2021-07-09 17:46:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.265446224256293) internal successors, (990), 437 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:55,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 990 transitions. [2021-07-09 17:46:55,598 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 990 transitions. Word has length 26 [2021-07-09 17:46:55,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:55,598 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 990 transitions. [2021-07-09 17:46:55,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:55,598 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 990 transitions. [2021-07-09 17:46:55,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:46:55,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:55,599 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:55,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:55,823 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:55,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:55,823 INFO L82 PathProgramCache]: Analyzing trace with hash -295197091, now seen corresponding path program 2 times [2021-07-09 17:46:55,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:55,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020867629] [2021-07-09 17:46:55,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:55,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:55,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020867629] [2021-07-09 17:46:55,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020867629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:55,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767305220] [2021-07-09 17:46:55,857 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 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 [2021-07-09 17:46:55,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:46:55,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:55,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:46:55,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:55,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767305220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:55,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:55,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 17:46:55,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021626587] [2021-07-09 17:46:55,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:46:55,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:55,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:46:55,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:46:55,975 INFO L87 Difference]: Start difference. First operand 438 states and 990 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:56,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:56,048 INFO L93 Difference]: Finished difference Result 491 states and 1077 transitions. [2021-07-09 17:46:56,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:46:56,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:46:56,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:56,050 INFO L225 Difference]: With dead ends: 491 [2021-07-09 17:46:56,050 INFO L226 Difference]: Without dead ends: 487 [2021-07-09 17:46:56,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:46:56,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-07-09 17:46:56,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 440. [2021-07-09 17:46:56,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.2574031890660593) internal successors, (991), 439 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:56,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 991 transitions. [2021-07-09 17:46:56,063 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 991 transitions. Word has length 26 [2021-07-09 17:46:56,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:56,064 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 991 transitions. [2021-07-09 17:46:56,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:56,064 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 991 transitions. [2021-07-09 17:46:56,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:46:56,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:56,065 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:56,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:56,269 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:56,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:56,270 INFO L82 PathProgramCache]: Analyzing trace with hash 11065031, now seen corresponding path program 3 times [2021-07-09 17:46:56,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:56,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443751375] [2021-07-09 17:46:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:56,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:56,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443751375] [2021-07-09 17:46:56,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443751375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:56,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357227630] [2021-07-09 17:46:56,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:56,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:46:56,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:56,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:46:56,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:56,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357227630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:56,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:56,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 17:46:56,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613868517] [2021-07-09 17:46:56,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:46:56,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:56,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:46:56,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:46:56,423 INFO L87 Difference]: Start difference. First operand 440 states and 991 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:56,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:56,480 INFO L93 Difference]: Finished difference Result 771 states and 1695 transitions. [2021-07-09 17:46:56,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:46:56,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:46:56,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:56,486 INFO L225 Difference]: With dead ends: 771 [2021-07-09 17:46:56,486 INFO L226 Difference]: Without dead ends: 771 [2021-07-09 17:46:56,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:46:56,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-07-09 17:46:56,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 634. [2021-07-09 17:46:56,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.3175355450236967) internal successors, (1467), 633 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1467 transitions. [2021-07-09 17:46:56,505 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1467 transitions. Word has length 26 [2021-07-09 17:46:56,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:56,505 INFO L482 AbstractCegarLoop]: Abstraction has 634 states and 1467 transitions. [2021-07-09 17:46:56,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:56,505 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1467 transitions. [2021-07-09 17:46:56,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:46:56,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:56,507 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:56,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 17:46:56,727 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:56,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:56,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1181121031, now seen corresponding path program 4 times [2021-07-09 17:46:56,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:56,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157308102] [2021-07-09 17:46:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:56,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:56,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157308102] [2021-07-09 17:46:56,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157308102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:56,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921651560] [2021-07-09 17:46:56,764 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 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 [2021-07-09 17:46:56,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:46:56,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:56,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:46:56,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:56,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921651560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:56,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:56,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 17:46:56,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4494426] [2021-07-09 17:46:56,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:46:56,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:56,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:46:56,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:46:56,853 INFO L87 Difference]: Start difference. First operand 634 states and 1467 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:56,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:56,902 INFO L93 Difference]: Finished difference Result 763 states and 1678 transitions. [2021-07-09 17:46:56,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:46:56,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:46:56,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:56,906 INFO L225 Difference]: With dead ends: 763 [2021-07-09 17:46:56,906 INFO L226 Difference]: Without dead ends: 759 [2021-07-09 17:46:56,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:46:56,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-07-09 17:46:56,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 634. [2021-07-09 17:46:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.3143759873617693) internal successors, (1465), 633 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1465 transitions. [2021-07-09 17:46:56,922 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1465 transitions. Word has length 26 [2021-07-09 17:46:56,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:56,922 INFO L482 AbstractCegarLoop]: Abstraction has 634 states and 1465 transitions. [2021-07-09 17:46:56,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:56,922 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1465 transitions. [2021-07-09 17:46:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:46:56,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:56,924 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:57,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:57,148 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:57,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:57,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1355618835, now seen corresponding path program 5 times [2021-07-09 17:46:57,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:57,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931596312] [2021-07-09 17:46:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:57,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:57,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931596312] [2021-07-09 17:46:57,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931596312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:57,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851673779] [2021-07-09 17:46:57,180 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 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 [2021-07-09 17:46:57,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:46:57,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:57,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:46:57,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:57,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851673779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:57,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:57,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:46:57,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192106776] [2021-07-09 17:46:57,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:46:57,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:57,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:46:57,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:46:57,308 INFO L87 Difference]: Start difference. First operand 634 states and 1465 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:57,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:57,388 INFO L93 Difference]: Finished difference Result 741 states and 1639 transitions. [2021-07-09 17:46:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:46:57,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:46:57,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:57,392 INFO L225 Difference]: With dead ends: 741 [2021-07-09 17:46:57,393 INFO L226 Difference]: Without dead ends: 721 [2021-07-09 17:46:57,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:46:57,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-07-09 17:46:57,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 654. [2021-07-09 17:46:57,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.2833078101071975) internal successors, (1491), 653 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:57,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1491 transitions. [2021-07-09 17:46:57,410 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1491 transitions. Word has length 26 [2021-07-09 17:46:57,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:57,412 INFO L482 AbstractCegarLoop]: Abstraction has 654 states and 1491 transitions. [2021-07-09 17:46:57,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:57,412 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1491 transitions. [2021-07-09 17:46:57,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:46:57,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:57,414 INFO L508 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] [2021-07-09 17:46:57,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:57,635 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:57,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:57,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1699913514, now seen corresponding path program 6 times [2021-07-09 17:46:57,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:57,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793555988] [2021-07-09 17:46:57,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:46:57,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:57,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793555988] [2021-07-09 17:46:57,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793555988] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:46:57,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:46:57,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:46:57,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617700283] [2021-07-09 17:46:57,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:46:57,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:57,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:46:57,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:46:57,658 INFO L87 Difference]: Start difference. First operand 654 states and 1491 transitions. Second operand has 4 states, 4 states have (on average 7.0) 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) [2021-07-09 17:46:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:57,672 INFO L93 Difference]: Finished difference Result 1106 states and 2391 transitions. [2021-07-09 17:46:57,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:46:57,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) 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 31 [2021-07-09 17:46:57,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:57,677 INFO L225 Difference]: With dead ends: 1106 [2021-07-09 17:46:57,677 INFO L226 Difference]: Without dead ends: 1106 [2021-07-09 17:46:57,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:46:57,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-07-09 17:46:57,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1035. [2021-07-09 17:46:57,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 2.2030947775628626) internal successors, (2278), 1034 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 2278 transitions. [2021-07-09 17:46:57,700 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 2278 transitions. Word has length 31 [2021-07-09 17:46:57,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:57,700 INFO L482 AbstractCegarLoop]: Abstraction has 1035 states and 2278 transitions. [2021-07-09 17:46:57,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.0) 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) [2021-07-09 17:46:57,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 2278 transitions. [2021-07-09 17:46:57,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:46:57,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:57,702 INFO L508 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] [2021-07-09 17:46:57,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-09 17:46:57,703 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:57,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:57,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1635269386, now seen corresponding path program 1 times [2021-07-09 17:46:57,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:57,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754238055] [2021-07-09 17:46:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:46:57,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:57,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754238055] [2021-07-09 17:46:57,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754238055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:57,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697086660] [2021-07-09 17:46:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:57,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:46:57,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:46:57,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697086660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:57,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:57,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 17:46:57,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844023028] [2021-07-09 17:46:57,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:46:57,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:57,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:46:57,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:46:57,879 INFO L87 Difference]: Start difference. First operand 1035 states and 2278 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:57,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:57,919 INFO L93 Difference]: Finished difference Result 1734 states and 3766 transitions. [2021-07-09 17:46:57,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:46:57,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:46:57,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:57,926 INFO L225 Difference]: With dead ends: 1734 [2021-07-09 17:46:57,927 INFO L226 Difference]: Without dead ends: 1715 [2021-07-09 17:46:57,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:46:57,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-07-09 17:46:57,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1571. [2021-07-09 17:46:57,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.212738853503185) internal successors, (3474), 1570 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:57,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3474 transitions. [2021-07-09 17:46:57,966 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3474 transitions. Word has length 31 [2021-07-09 17:46:57,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:57,966 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 3474 transitions. [2021-07-09 17:46:57,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:57,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3474 transitions. [2021-07-09 17:46:57,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:46:57,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:57,970 INFO L508 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] [2021-07-09 17:46:58,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 17:46:58,193 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:58,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:58,193 INFO L82 PathProgramCache]: Analyzing trace with hash -900951882, now seen corresponding path program 2 times [2021-07-09 17:46:58,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:58,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341305164] [2021-07-09 17:46:58,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:46:58,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:58,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341305164] [2021-07-09 17:46:58,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341305164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:58,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566420177] [2021-07-09 17:46:58,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:58,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:46:58,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:58,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:46:58,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:46:58,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566420177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:58,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:58,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 17:46:58,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321065318] [2021-07-09 17:46:58,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:46:58,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:58,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:46:58,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:46:58,358 INFO L87 Difference]: Start difference. First operand 1571 states and 3474 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:58,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:58,402 INFO L93 Difference]: Finished difference Result 2696 states and 5884 transitions. [2021-07-09 17:46:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:46:58,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:46:58,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:58,414 INFO L225 Difference]: With dead ends: 2696 [2021-07-09 17:46:58,414 INFO L226 Difference]: Without dead ends: 2677 [2021-07-09 17:46:58,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:46:58,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-07-09 17:46:58,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2412. [2021-07-09 17:46:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.2310244711737868) internal successors, (5379), 2411 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:58,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 5379 transitions. [2021-07-09 17:46:58,473 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 5379 transitions. Word has length 31 [2021-07-09 17:46:58,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:58,473 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 5379 transitions. [2021-07-09 17:46:58,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:58,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 5379 transitions. [2021-07-09 17:46:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:46:58,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:58,478 INFO L508 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] [2021-07-09 17:46:58,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 17:46:58,693 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:58,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:58,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1275162418, now seen corresponding path program 3 times [2021-07-09 17:46:58,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:58,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85559148] [2021-07-09 17:46:58,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:58,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:58,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85559148] [2021-07-09 17:46:58,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85559148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:58,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152227241] [2021-07-09 17:46:58,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:58,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:46:58,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:58,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:46:58,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:58,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152227241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:58,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:58,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:46:58,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130637806] [2021-07-09 17:46:58,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:46:58,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:58,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:46:58,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:46:58,856 INFO L87 Difference]: Start difference. First operand 2412 states and 5379 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:58,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:58,925 INFO L93 Difference]: Finished difference Result 4261 states and 9366 transitions. [2021-07-09 17:46:58,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:46:58,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:46:58,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:58,945 INFO L225 Difference]: With dead ends: 4261 [2021-07-09 17:46:58,945 INFO L226 Difference]: Without dead ends: 4236 [2021-07-09 17:46:58,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:46:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4236 states. [2021-07-09 17:46:59,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4236 to 3410. [2021-07-09 17:46:59,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3409 states have (on average 2.24435318275154) internal successors, (7651), 3409 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 7651 transitions. [2021-07-09 17:46:59,075 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 7651 transitions. Word has length 31 [2021-07-09 17:46:59,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:59,075 INFO L482 AbstractCegarLoop]: Abstraction has 3410 states and 7651 transitions. [2021-07-09 17:46:59,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:59,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 7651 transitions. [2021-07-09 17:46:59,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:46:59,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:59,082 INFO L508 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] [2021-07-09 17:46:59,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 17:46:59,297 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:59,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:59,297 INFO L82 PathProgramCache]: Analyzing trace with hash -86510450, now seen corresponding path program 4 times [2021-07-09 17:46:59,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:59,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384789995] [2021-07-09 17:46:59,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:59,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:59,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:59,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384789995] [2021-07-09 17:46:59,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384789995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:59,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409979823] [2021-07-09 17:46:59,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:59,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:46:59,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:59,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:46:59,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:59,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409979823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:59,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:59,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:46:59,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458869461] [2021-07-09 17:46:59,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:46:59,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:59,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:46:59,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:46:59,456 INFO L87 Difference]: Start difference. First operand 3410 states and 7651 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:59,515 INFO L93 Difference]: Finished difference Result 4354 states and 9576 transitions. [2021-07-09 17:46:59,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:46:59,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:46:59,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:59,534 INFO L225 Difference]: With dead ends: 4354 [2021-07-09 17:46:59,534 INFO L226 Difference]: Without dead ends: 4335 [2021-07-09 17:46:59,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:46:59,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-07-09 17:46:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 3543. [2021-07-09 17:46:59,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 2.2478825522303785) internal successors, (7962), 3542 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:59,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 7962 transitions. [2021-07-09 17:46:59,628 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 7962 transitions. Word has length 31 [2021-07-09 17:46:59,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:59,629 INFO L482 AbstractCegarLoop]: Abstraction has 3543 states and 7962 transitions. [2021-07-09 17:46:59,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:59,629 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 7962 transitions. [2021-07-09 17:46:59,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:46:59,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:59,636 INFO L508 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] [2021-07-09 17:46:59,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 17:46:59,849 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:59,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:59,850 INFO L82 PathProgramCache]: Analyzing trace with hash 702036756, now seen corresponding path program 5 times [2021-07-09 17:46:59,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:59,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961499719] [2021-07-09 17:46:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:59,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:46:59,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:59,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961499719] [2021-07-09 17:46:59,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961499719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:59,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264823612] [2021-07-09 17:46:59,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:46:59,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:46:59,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:59,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:46:59,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:47:00,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264823612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:00,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:00,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 17:47:00,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347971526] [2021-07-09 17:47:00,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:47:00,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:00,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:47:00,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:47:00,026 INFO L87 Difference]: Start difference. First operand 3543 states and 7962 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:00,074 INFO L93 Difference]: Finished difference Result 4170 states and 9274 transitions. [2021-07-09 17:47:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:47:00,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:47:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:00,100 INFO L225 Difference]: With dead ends: 4170 [2021-07-09 17:47:00,101 INFO L226 Difference]: Without dead ends: 4151 [2021-07-09 17:47:00,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:47:00,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-07-09 17:47:00,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3929. [2021-07-09 17:47:00,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3929 states, 3928 states have (on average 2.253818737270876) internal successors, (8853), 3928 states have internal predecessors, (8853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:00,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 8853 transitions. [2021-07-09 17:47:00,203 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 8853 transitions. Word has length 31 [2021-07-09 17:47:00,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:00,203 INFO L482 AbstractCegarLoop]: Abstraction has 3929 states and 8853 transitions. [2021-07-09 17:47:00,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:00,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 8853 transitions. [2021-07-09 17:47:00,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:47:00,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:00,211 INFO L508 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] [2021-07-09 17:47:00,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 17:47:00,436 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:00,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:00,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1049711310, now seen corresponding path program 6 times [2021-07-09 17:47:00,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:00,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062915700] [2021-07-09 17:47:00,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:00,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:00,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062915700] [2021-07-09 17:47:00,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062915700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:00,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415006106] [2021-07-09 17:47:00,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:00,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:47:00,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:00,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:47:00,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:00,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415006106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:00,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:00,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:47:00,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042341881] [2021-07-09 17:47:00,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:47:00,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:00,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:47:00,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:47:00,590 INFO L87 Difference]: Start difference. First operand 3929 states and 8853 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:00,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:00,652 INFO L93 Difference]: Finished difference Result 5348 states and 11836 transitions. [2021-07-09 17:47:00,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:47:00,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:47:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:00,667 INFO L225 Difference]: With dead ends: 5348 [2021-07-09 17:47:00,667 INFO L226 Difference]: Without dead ends: 5329 [2021-07-09 17:47:00,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:47:00,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2021-07-09 17:47:00,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 4092. [2021-07-09 17:47:00,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4092 states, 4091 states have (on average 2.2561720850647764) internal successors, (9230), 4091 states have internal predecessors, (9230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:00,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4092 states to 4092 states and 9230 transitions. [2021-07-09 17:47:00,813 INFO L78 Accepts]: Start accepts. Automaton has 4092 states and 9230 transitions. Word has length 31 [2021-07-09 17:47:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:00,813 INFO L482 AbstractCegarLoop]: Abstraction has 4092 states and 9230 transitions. [2021-07-09 17:47:00,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:00,814 INFO L276 IsEmpty]: Start isEmpty. Operand 4092 states and 9230 transitions. [2021-07-09 17:47:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:47:00,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:00,821 INFO L508 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] [2021-07-09 17:47:01,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:01,029 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:01,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:01,029 INFO L82 PathProgramCache]: Analyzing trace with hash -2056604018, now seen corresponding path program 7 times [2021-07-09 17:47:01,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:01,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596354989] [2021-07-09 17:47:01,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:01,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:01,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596354989] [2021-07-09 17:47:01,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596354989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:01,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094534470] [2021-07-09 17:47:01,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:01,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:47:01,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:01,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094534470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:01,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:01,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:47:01,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007473959] [2021-07-09 17:47:01,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:47:01,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:01,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:47:01,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:47:01,180 INFO L87 Difference]: Start difference. First operand 4092 states and 9230 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:01,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:01,247 INFO L93 Difference]: Finished difference Result 5419 states and 11952 transitions. [2021-07-09 17:47:01,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:47:01,248 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:47:01,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:01,260 INFO L225 Difference]: With dead ends: 5419 [2021-07-09 17:47:01,260 INFO L226 Difference]: Without dead ends: 5400 [2021-07-09 17:47:01,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:47:01,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2021-07-09 17:47:01,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 2885. [2021-07-09 17:47:01,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2885 states, 2884 states have (on average 2.235090152565881) internal successors, (6446), 2884 states have internal predecessors, (6446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:01,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 6446 transitions. [2021-07-09 17:47:01,330 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 6446 transitions. Word has length 31 [2021-07-09 17:47:01,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:01,330 INFO L482 AbstractCegarLoop]: Abstraction has 2885 states and 6446 transitions. [2021-07-09 17:47:01,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:01,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 6446 transitions. [2021-07-09 17:47:01,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:47:01,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:01,336 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:01,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:01,555 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:01,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:01,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1347381606, now seen corresponding path program 8 times [2021-07-09 17:47:01,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:01,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796840756] [2021-07-09 17:47:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:01,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:01,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796840756] [2021-07-09 17:47:01,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796840756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:01,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528707613] [2021-07-09 17:47:01,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:01,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:01,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:01,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:47:01,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:01,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528707613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:01,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:01,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:01,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782983126] [2021-07-09 17:47:01,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:01,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:01,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:01,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:01,719 INFO L87 Difference]: Start difference. First operand 2885 states and 6446 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:01,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:01,844 INFO L93 Difference]: Finished difference Result 5635 states and 12327 transitions. [2021-07-09 17:47:01,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:47:01,845 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:47:01,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:01,857 INFO L225 Difference]: With dead ends: 5635 [2021-07-09 17:47:01,857 INFO L226 Difference]: Without dead ends: 5635 [2021-07-09 17:47:01,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:01,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5635 states. [2021-07-09 17:47:01,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5635 to 3879. [2021-07-09 17:47:01,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3879 states, 3878 states have (on average 2.2439401753481176) internal successors, (8702), 3878 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3879 states to 3879 states and 8702 transitions. [2021-07-09 17:47:01,942 INFO L78 Accepts]: Start accepts. Automaton has 3879 states and 8702 transitions. Word has length 36 [2021-07-09 17:47:01,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:01,942 INFO L482 AbstractCegarLoop]: Abstraction has 3879 states and 8702 transitions. [2021-07-09 17:47:01,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:01,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3879 states and 8702 transitions. [2021-07-09 17:47:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:47:01,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:01,950 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:02,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 17:47:02,165 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:02,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:02,165 INFO L82 PathProgramCache]: Analyzing trace with hash -813812389, now seen corresponding path program 9 times [2021-07-09 17:47:02,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:02,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104109686] [2021-07-09 17:47:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:02,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:02,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104109686] [2021-07-09 17:47:02,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104109686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:02,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129058764] [2021-07-09 17:47:02,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:02,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:47:02,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:02,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:47:02,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:02,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129058764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:02,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:02,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:02,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437719904] [2021-07-09 17:47:02,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:02,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:02,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:02,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:02,304 INFO L87 Difference]: Start difference. First operand 3879 states and 8702 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:02,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:02,425 INFO L93 Difference]: Finished difference Result 7170 states and 15945 transitions. [2021-07-09 17:47:02,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:02,426 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:47:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:02,443 INFO L225 Difference]: With dead ends: 7170 [2021-07-09 17:47:02,443 INFO L226 Difference]: Without dead ends: 7072 [2021-07-09 17:47:02,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:02,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7072 states. [2021-07-09 17:47:02,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7072 to 6656. [2021-07-09 17:47:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6656 states, 6655 states have (on average 2.251089406461307) internal successors, (14981), 6655 states have internal predecessors, (14981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:02,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 14981 transitions. [2021-07-09 17:47:02,582 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 14981 transitions. Word has length 36 [2021-07-09 17:47:02,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:02,582 INFO L482 AbstractCegarLoop]: Abstraction has 6656 states and 14981 transitions. [2021-07-09 17:47:02,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:02,583 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 14981 transitions. [2021-07-09 17:47:02,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:47:02,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:02,593 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:02,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:02,809 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:02,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:02,809 INFO L82 PathProgramCache]: Analyzing trace with hash -16954001, now seen corresponding path program 10 times [2021-07-09 17:47:02,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:02,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830449113] [2021-07-09 17:47:02,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:02,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:02,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830449113] [2021-07-09 17:47:02,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830449113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:02,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557276756] [2021-07-09 17:47:02,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:02,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:02,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:02,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:47:02,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:02,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557276756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:02,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:02,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:47:02,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495438132] [2021-07-09 17:47:02,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:47:02,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:02,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:47:02,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:47:02,944 INFO L87 Difference]: Start difference. First operand 6656 states and 14981 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:03,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:03,032 INFO L93 Difference]: Finished difference Result 6984 states and 15407 transitions. [2021-07-09 17:47:03,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:47:03,032 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:47:03,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:03,048 INFO L225 Difference]: With dead ends: 6984 [2021-07-09 17:47:03,048 INFO L226 Difference]: Without dead ends: 6984 [2021-07-09 17:47:03,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:03,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6984 states. [2021-07-09 17:47:03,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6984 to 6596. [2021-07-09 17:47:03,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.234571645185747) internal successors, (14737), 6595 states have internal predecessors, (14737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 14737 transitions. [2021-07-09 17:47:03,206 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 14737 transitions. Word has length 36 [2021-07-09 17:47:03,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:03,207 INFO L482 AbstractCegarLoop]: Abstraction has 6596 states and 14737 transitions. [2021-07-09 17:47:03,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:03,207 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 14737 transitions. [2021-07-09 17:47:03,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:47:03,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:03,217 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:03,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 17:47:03,433 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:03,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:03,433 INFO L82 PathProgramCache]: Analyzing trace with hash -780141082, now seen corresponding path program 11 times [2021-07-09 17:47:03,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:03,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353594928] [2021-07-09 17:47:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:03,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:03,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353594928] [2021-07-09 17:47:03,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353594928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:03,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072579411] [2021-07-09 17:47:03,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:03,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:47:03,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:03,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:47:03,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:03,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072579411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:03,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:03,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:47:03,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163079010] [2021-07-09 17:47:03,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:47:03,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:03,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:47:03,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:47:03,618 INFO L87 Difference]: Start difference. First operand 6596 states and 14737 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:03,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:03,714 INFO L93 Difference]: Finished difference Result 7018 states and 15447 transitions. [2021-07-09 17:47:03,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:47:03,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:47:03,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:03,734 INFO L225 Difference]: With dead ends: 7018 [2021-07-09 17:47:03,735 INFO L226 Difference]: Without dead ends: 7014 [2021-07-09 17:47:03,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7014 states. [2021-07-09 17:47:03,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7014 to 6152. [2021-07-09 17:47:03,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6152 states, 6151 states have (on average 2.238497805234921) internal successors, (13769), 6151 states have internal predecessors, (13769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:03,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6152 states to 6152 states and 13769 transitions. [2021-07-09 17:47:03,895 INFO L78 Accepts]: Start accepts. Automaton has 6152 states and 13769 transitions. Word has length 36 [2021-07-09 17:47:03,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:03,895 INFO L482 AbstractCegarLoop]: Abstraction has 6152 states and 13769 transitions. [2021-07-09 17:47:03,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:03,895 INFO L276 IsEmpty]: Start isEmpty. Operand 6152 states and 13769 transitions. [2021-07-09 17:47:03,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:47:03,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:03,906 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:04,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 17:47:04,128 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:04,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:04,129 INFO L82 PathProgramCache]: Analyzing trace with hash 337483942, now seen corresponding path program 12 times [2021-07-09 17:47:04,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:04,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017330936] [2021-07-09 17:47:04,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:04,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:04,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017330936] [2021-07-09 17:47:04,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017330936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:04,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586749503] [2021-07-09 17:47:04,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:04,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:47:04,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:04,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:47:04,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:04,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586749503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:04,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:04,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:47:04,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968384640] [2021-07-09 17:47:04,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:47:04,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:04,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:47:04,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:47:04,257 INFO L87 Difference]: Start difference. First operand 6152 states and 13769 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:04,355 INFO L93 Difference]: Finished difference Result 9612 states and 21128 transitions. [2021-07-09 17:47:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:47:04,356 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:47:04,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:04,375 INFO L225 Difference]: With dead ends: 9612 [2021-07-09 17:47:04,375 INFO L226 Difference]: Without dead ends: 9612 [2021-07-09 17:47:04,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:04,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9612 states. [2021-07-09 17:47:04,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9612 to 8560. [2021-07-09 17:47:04,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8560 states, 8559 states have (on average 2.2475756513611405) internal successors, (19237), 8559 states have internal predecessors, (19237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8560 states to 8560 states and 19237 transitions. [2021-07-09 17:47:04,542 INFO L78 Accepts]: Start accepts. Automaton has 8560 states and 19237 transitions. Word has length 36 [2021-07-09 17:47:04,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:04,543 INFO L482 AbstractCegarLoop]: Abstraction has 8560 states and 19237 transitions. [2021-07-09 17:47:04,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:04,543 INFO L276 IsEmpty]: Start isEmpty. Operand 8560 states and 19237 transitions. [2021-07-09 17:47:04,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:47:04,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:04,553 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:04,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 17:47:04,770 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:04,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:04,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1332438811, now seen corresponding path program 13 times [2021-07-09 17:47:04,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:04,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157281688] [2021-07-09 17:47:04,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:04,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:04,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157281688] [2021-07-09 17:47:04,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157281688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:04,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143130798] [2021-07-09 17:47:04,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:04,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:47:04,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:04,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143130798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:04,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:04,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:47:04,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216398861] [2021-07-09 17:47:04,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:47:04,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:04,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:47:04,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:47:04,925 INFO L87 Difference]: Start difference. First operand 8560 states and 19237 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:05,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:05,027 INFO L93 Difference]: Finished difference Result 10199 states and 22770 transitions. [2021-07-09 17:47:05,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:47:05,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:47:05,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:05,048 INFO L225 Difference]: With dead ends: 10199 [2021-07-09 17:47:05,048 INFO L226 Difference]: Without dead ends: 10193 [2021-07-09 17:47:05,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:05,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10193 states. [2021-07-09 17:47:05,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10193 to 9772. [2021-07-09 17:47:05,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9772 states, 9771 states have (on average 2.2569849554805037) internal successors, (22053), 9771 states have internal predecessors, (22053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:05,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9772 states to 9772 states and 22053 transitions. [2021-07-09 17:47:05,257 INFO L78 Accepts]: Start accepts. Automaton has 9772 states and 22053 transitions. Word has length 36 [2021-07-09 17:47:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:05,258 INFO L482 AbstractCegarLoop]: Abstraction has 9772 states and 22053 transitions. [2021-07-09 17:47:05,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:05,258 INFO L276 IsEmpty]: Start isEmpty. Operand 9772 states and 22053 transitions. [2021-07-09 17:47:05,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:47:05,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:05,269 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:05,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 17:47:05,488 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:05,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:05,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1688140945, now seen corresponding path program 14 times [2021-07-09 17:47:05,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:05,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081864539] [2021-07-09 17:47:05,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:05,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:05,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081864539] [2021-07-09 17:47:05,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081864539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:05,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871200095] [2021-07-09 17:47:05,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:05,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:05,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:05,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:47:05,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:05,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871200095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:05,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:05,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:47:05,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847602192] [2021-07-09 17:47:05,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:47:05,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:05,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:47:05,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:47:05,667 INFO L87 Difference]: Start difference. First operand 9772 states and 22053 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:05,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:05,755 INFO L93 Difference]: Finished difference Result 10439 states and 23230 transitions. [2021-07-09 17:47:05,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:47:05,756 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:47:05,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:05,773 INFO L225 Difference]: With dead ends: 10439 [2021-07-09 17:47:05,773 INFO L226 Difference]: Without dead ends: 10437 [2021-07-09 17:47:05,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10437 states. [2021-07-09 17:47:05,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10437 to 9840. [2021-07-09 17:47:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9840 states, 9839 states have (on average 2.252363045024901) internal successors, (22161), 9839 states have internal predecessors, (22161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:05,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9840 states to 9840 states and 22161 transitions. [2021-07-09 17:47:05,949 INFO L78 Accepts]: Start accepts. Automaton has 9840 states and 22161 transitions. Word has length 36 [2021-07-09 17:47:05,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:05,949 INFO L482 AbstractCegarLoop]: Abstraction has 9840 states and 22161 transitions. [2021-07-09 17:47:05,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:05,949 INFO L276 IsEmpty]: Start isEmpty. Operand 9840 states and 22161 transitions. [2021-07-09 17:47:05,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:47:05,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:05,959 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:06,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 17:47:06,181 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:06,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:06,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1843639270, now seen corresponding path program 15 times [2021-07-09 17:47:06,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:06,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400548550] [2021-07-09 17:47:06,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:06,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:06,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400548550] [2021-07-09 17:47:06,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400548550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:06,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816872135] [2021-07-09 17:47:06,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:06,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:47:06,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:06,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:47:06,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:47:06,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816872135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:06,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:06,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-07-09 17:47:06,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342216000] [2021-07-09 17:47:06,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:47:06,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:06,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:47:06,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:47:06,382 INFO L87 Difference]: Start difference. First operand 9840 states and 22161 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:06,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:06,780 INFO L93 Difference]: Finished difference Result 16933 states and 36602 transitions. [2021-07-09 17:47:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:47:06,781 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:47:06,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:06,810 INFO L225 Difference]: With dead ends: 16933 [2021-07-09 17:47:06,810 INFO L226 Difference]: Without dead ends: 16887 [2021-07-09 17:47:06,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 215.5ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:47:06,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16887 states. [2021-07-09 17:47:07,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16887 to 11694. [2021-07-09 17:47:07,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11694 states, 11693 states have (on average 2.213033438809544) internal successors, (25877), 11693 states have internal predecessors, (25877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11694 states to 11694 states and 25877 transitions. [2021-07-09 17:47:07,122 INFO L78 Accepts]: Start accepts. Automaton has 11694 states and 25877 transitions. Word has length 36 [2021-07-09 17:47:07,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:07,122 INFO L482 AbstractCegarLoop]: Abstraction has 11694 states and 25877 transitions. [2021-07-09 17:47:07,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:07,122 INFO L276 IsEmpty]: Start isEmpty. Operand 11694 states and 25877 transitions. [2021-07-09 17:47:07,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:47:07,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:07,133 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:07,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:07,355 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:07,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:07,356 INFO L82 PathProgramCache]: Analyzing trace with hash 2027368357, now seen corresponding path program 16 times [2021-07-09 17:47:07,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:07,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665409736] [2021-07-09 17:47:07,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:07,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:07,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665409736] [2021-07-09 17:47:07,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665409736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:07,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576258721] [2021-07-09 17:47:07,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:07,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:07,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:07,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:47:07,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:07,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576258721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:07,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:07,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:47:07,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475094023] [2021-07-09 17:47:07,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:47:07,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:07,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:47:07,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:07,499 INFO L87 Difference]: Start difference. First operand 11694 states and 25877 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:07,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:07,614 INFO L93 Difference]: Finished difference Result 12577 states and 27332 transitions. [2021-07-09 17:47:07,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:47:07,614 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:47:07,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:07,641 INFO L225 Difference]: With dead ends: 12577 [2021-07-09 17:47:07,642 INFO L226 Difference]: Without dead ends: 12575 [2021-07-09 17:47:07,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:47:07,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12575 states. [2021-07-09 17:47:07,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12575 to 11238. [2021-07-09 17:47:07,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11238 states, 11237 states have (on average 2.20352407226128) internal successors, (24761), 11237 states have internal predecessors, (24761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:07,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11238 states to 11238 states and 24761 transitions. [2021-07-09 17:47:07,913 INFO L78 Accepts]: Start accepts. Automaton has 11238 states and 24761 transitions. Word has length 36 [2021-07-09 17:47:07,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:07,913 INFO L482 AbstractCegarLoop]: Abstraction has 11238 states and 24761 transitions. [2021-07-09 17:47:07,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:07,913 INFO L276 IsEmpty]: Start isEmpty. Operand 11238 states and 24761 transitions. [2021-07-09 17:47:07,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:47:07,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:07,923 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:08,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:47:08,145 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:08,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:08,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1853631623, now seen corresponding path program 17 times [2021-07-09 17:47:08,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:08,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793912062] [2021-07-09 17:47:08,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:47:08,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:08,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793912062] [2021-07-09 17:47:08,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793912062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:08,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71729032] [2021-07-09 17:47:08,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:08,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:47:08,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:08,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:47:08,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:47:08,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71729032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:08,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:08,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:47:08,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690090107] [2021-07-09 17:47:08,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:47:08,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:08,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:47:08,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:08,329 INFO L87 Difference]: Start difference. First operand 11238 states and 24761 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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) [2021-07-09 17:47:08,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:08,447 INFO L93 Difference]: Finished difference Result 11745 states and 25558 transitions. [2021-07-09 17:47:08,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:47:08,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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 36 [2021-07-09 17:47:08,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:08,467 INFO L225 Difference]: With dead ends: 11745 [2021-07-09 17:47:08,467 INFO L226 Difference]: Without dead ends: 11709 [2021-07-09 17:47:08,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:47:08,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11709 states. [2021-07-09 17:47:08,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11709 to 11232. [2021-07-09 17:47:08,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 11231 states have (on average 2.19740005342356) internal successors, (24679), 11231 states have internal predecessors, (24679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 24679 transitions. [2021-07-09 17:47:08,725 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 24679 transitions. Word has length 36 [2021-07-09 17:47:08,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:08,725 INFO L482 AbstractCegarLoop]: Abstraction has 11232 states and 24679 transitions. [2021-07-09 17:47:08,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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) [2021-07-09 17:47:08,725 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 24679 transitions. [2021-07-09 17:47:08,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:47:08,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:08,731 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:08,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:08,931 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:08,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:08,931 INFO L82 PathProgramCache]: Analyzing trace with hash -730012133, now seen corresponding path program 18 times [2021-07-09 17:47:08,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:08,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406580360] [2021-07-09 17:47:08,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:09,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:09,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406580360] [2021-07-09 17:47:09,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406580360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:09,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11785833] [2021-07-09 17:47:09,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:09,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:47:09,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:09,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:47:09,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:09,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11785833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:09,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:09,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:47:09,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256336261] [2021-07-09 17:47:09,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:47:09,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:09,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:47:09,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:47:09,126 INFO L87 Difference]: Start difference. First operand 11232 states and 24679 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:09,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:09,244 INFO L93 Difference]: Finished difference Result 13428 states and 29318 transitions. [2021-07-09 17:47:09,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:47:09,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:47:09,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:09,271 INFO L225 Difference]: With dead ends: 13428 [2021-07-09 17:47:09,272 INFO L226 Difference]: Without dead ends: 13422 [2021-07-09 17:47:09,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13422 states. [2021-07-09 17:47:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13422 to 12944. [2021-07-09 17:47:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12944 states, 12943 states have (on average 2.2074480414123463) internal successors, (28571), 12943 states have internal predecessors, (28571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:09,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12944 states to 12944 states and 28571 transitions. [2021-07-09 17:47:09,528 INFO L78 Accepts]: Start accepts. Automaton has 12944 states and 28571 transitions. Word has length 36 [2021-07-09 17:47:09,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:09,528 INFO L482 AbstractCegarLoop]: Abstraction has 12944 states and 28571 transitions. [2021-07-09 17:47:09,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:09,528 INFO L276 IsEmpty]: Start isEmpty. Operand 12944 states and 28571 transitions. [2021-07-09 17:47:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:47:09,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:09,534 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:09,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 17:47:09,737 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:09,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:09,737 INFO L82 PathProgramCache]: Analyzing trace with hash 544375407, now seen corresponding path program 19 times [2021-07-09 17:47:09,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:09,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388708963] [2021-07-09 17:47:09,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:09,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:09,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388708963] [2021-07-09 17:47:09,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388708963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:09,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173646292] [2021-07-09 17:47:09,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:09,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:47:09,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:09,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173646292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:09,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:09,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:47:09,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876933147] [2021-07-09 17:47:09,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:47:09,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:09,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:47:09,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:47:09,860 INFO L87 Difference]: Start difference. First operand 12944 states and 28571 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:09,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:09,967 INFO L93 Difference]: Finished difference Result 13864 states and 30236 transitions. [2021-07-09 17:47:09,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:47:09,967 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:47:09,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:09,993 INFO L225 Difference]: With dead ends: 13864 [2021-07-09 17:47:09,993 INFO L226 Difference]: Without dead ends: 13864 [2021-07-09 17:47:09,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:10,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13864 states. [2021-07-09 17:47:10,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13864 to 12976. [2021-07-09 17:47:10,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12976 states, 12975 states have (on average 2.206936416184971) internal successors, (28635), 12975 states have internal predecessors, (28635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:10,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12976 states to 12976 states and 28635 transitions. [2021-07-09 17:47:10,369 INFO L78 Accepts]: Start accepts. Automaton has 12976 states and 28635 transitions. Word has length 36 [2021-07-09 17:47:10,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:10,369 INFO L482 AbstractCegarLoop]: Abstraction has 12976 states and 28635 transitions. [2021-07-09 17:47:10,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:10,369 INFO L276 IsEmpty]: Start isEmpty. Operand 12976 states and 28635 transitions. [2021-07-09 17:47:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:47:10,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:10,374 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:10,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:10,574 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:10,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:10,575 INFO L82 PathProgramCache]: Analyzing trace with hash -35082587, now seen corresponding path program 20 times [2021-07-09 17:47:10,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:10,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255123649] [2021-07-09 17:47:10,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:10,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:10,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255123649] [2021-07-09 17:47:10,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255123649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:10,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349165764] [2021-07-09 17:47:10,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:10,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:10,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:10,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:47:10,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:10,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349165764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:10,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:10,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:47:10,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642923172] [2021-07-09 17:47:10,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:47:10,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:10,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:47:10,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:10,692 INFO L87 Difference]: Start difference. First operand 12976 states and 28635 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:10,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:10,818 INFO L93 Difference]: Finished difference Result 14564 states and 31706 transitions. [2021-07-09 17:47:10,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:47:10,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:47:10,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:10,838 INFO L225 Difference]: With dead ends: 14564 [2021-07-09 17:47:10,838 INFO L226 Difference]: Without dead ends: 14564 [2021-07-09 17:47:10,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:47:10,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14564 states. [2021-07-09 17:47:11,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14564 to 13136. [2021-07-09 17:47:11,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13136 states, 13135 states have (on average 2.204415683288923) internal successors, (28955), 13135 states have internal predecessors, (28955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:11,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13136 states to 13136 states and 28955 transitions. [2021-07-09 17:47:11,057 INFO L78 Accepts]: Start accepts. Automaton has 13136 states and 28955 transitions. Word has length 36 [2021-07-09 17:47:11,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:11,057 INFO L482 AbstractCegarLoop]: Abstraction has 13136 states and 28955 transitions. [2021-07-09 17:47:11,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 13136 states and 28955 transitions. [2021-07-09 17:47:11,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 17:47:11,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:11,065 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:11,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 17:47:11,265 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:11,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1417782343, now seen corresponding path program 21 times [2021-07-09 17:47:11,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:11,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779191462] [2021-07-09 17:47:11,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:11,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:11,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779191462] [2021-07-09 17:47:11,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779191462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:11,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794561250] [2021-07-09 17:47:11,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:11,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:47:11,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:11,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:47:11,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:11,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794561250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:11,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:11,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:11,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908161253] [2021-07-09 17:47:11,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:11,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:11,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:11,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:11,399 INFO L87 Difference]: Start difference. First operand 13136 states and 28955 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:11,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:11,547 INFO L93 Difference]: Finished difference Result 14130 states and 30823 transitions. [2021-07-09 17:47:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:47:11,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 17:47:11,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:11,567 INFO L225 Difference]: With dead ends: 14130 [2021-07-09 17:47:11,568 INFO L226 Difference]: Without dead ends: 14130 [2021-07-09 17:47:11,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:11,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14130 states. [2021-07-09 17:47:11,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14130 to 12516. [2021-07-09 17:47:11,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12516 states, 12515 states have (on average 2.204314822213344) internal successors, (27587), 12515 states have internal predecessors, (27587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:11,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12516 states to 12516 states and 27587 transitions. [2021-07-09 17:47:11,781 INFO L78 Accepts]: Start accepts. Automaton has 12516 states and 27587 transitions. Word has length 36 [2021-07-09 17:47:11,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:11,782 INFO L482 AbstractCegarLoop]: Abstraction has 12516 states and 27587 transitions. [2021-07-09 17:47:11,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:11,782 INFO L276 IsEmpty]: Start isEmpty. Operand 12516 states and 27587 transitions. [2021-07-09 17:47:11,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 17:47:11,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:11,793 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:11,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:11,997 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:11,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:11,997 INFO L82 PathProgramCache]: Analyzing trace with hash 46076731, now seen corresponding path program 22 times [2021-07-09 17:47:11,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:11,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567299017] [2021-07-09 17:47:11,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:12,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:12,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567299017] [2021-07-09 17:47:12,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567299017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:12,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477711576] [2021-07-09 17:47:12,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:12,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:12,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:12,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:47:12,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:12,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477711576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:12,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:12,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:47:12,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329953420] [2021-07-09 17:47:12,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:47:12,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:12,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:47:12,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:47:12,144 INFO L87 Difference]: Start difference. First operand 12516 states and 27587 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) [2021-07-09 17:47:12,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:12,337 INFO L93 Difference]: Finished difference Result 15926 states and 34731 transitions. [2021-07-09 17:47:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:12,338 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 46 [2021-07-09 17:47:12,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:12,361 INFO L225 Difference]: With dead ends: 15926 [2021-07-09 17:47:12,361 INFO L226 Difference]: Without dead ends: 15926 [2021-07-09 17:47:12,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:12,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15926 states. [2021-07-09 17:47:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15926 to 13120. [2021-07-09 17:47:12,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13120 states, 13119 states have (on average 2.2095434103209084) internal successors, (28987), 13119 states have internal predecessors, (28987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:12,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13120 states to 13120 states and 28987 transitions. [2021-07-09 17:47:12,531 INFO L78 Accepts]: Start accepts. Automaton has 13120 states and 28987 transitions. Word has length 46 [2021-07-09 17:47:12,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:12,531 INFO L482 AbstractCegarLoop]: Abstraction has 13120 states and 28987 transitions. [2021-07-09 17:47:12,531 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) [2021-07-09 17:47:12,532 INFO L276 IsEmpty]: Start isEmpty. Operand 13120 states and 28987 transitions. [2021-07-09 17:47:12,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 17:47:12,545 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:12,545 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:12,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 17:47:12,757 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:12,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash 973293501, now seen corresponding path program 23 times [2021-07-09 17:47:12,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:12,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393344508] [2021-07-09 17:47:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:12,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:12,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393344508] [2021-07-09 17:47:12,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393344508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:12,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390089640] [2021-07-09 17:47:12,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:12,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:47:12,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:12,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:47:12,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:12,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390089640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:12,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:12,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:47:12,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570856218] [2021-07-09 17:47:12,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:47:12,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:12,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:47:12,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:12,896 INFO L87 Difference]: Start difference. First operand 13120 states and 28987 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-07-09 17:47:13,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:13,041 INFO L93 Difference]: Finished difference Result 13630 states and 29839 transitions. [2021-07-09 17:47:13,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:13,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-07-09 17:47:13,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:13,059 INFO L225 Difference]: With dead ends: 13630 [2021-07-09 17:47:13,059 INFO L226 Difference]: Without dead ends: 13622 [2021-07-09 17:47:13,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:47:13,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13622 states. [2021-07-09 17:47:13,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13622 to 13056. [2021-07-09 17:47:13,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13056 states, 13055 states have (on average 2.2050555342780545) internal successors, (28787), 13055 states have internal predecessors, (28787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:13,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13056 states to 13056 states and 28787 transitions. [2021-07-09 17:47:13,220 INFO L78 Accepts]: Start accepts. Automaton has 13056 states and 28787 transitions. Word has length 46 [2021-07-09 17:47:13,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:13,220 INFO L482 AbstractCegarLoop]: Abstraction has 13056 states and 28787 transitions. [2021-07-09 17:47:13,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-07-09 17:47:13,221 INFO L276 IsEmpty]: Start isEmpty. Operand 13056 states and 28787 transitions. [2021-07-09 17:47:13,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 17:47:13,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:13,235 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:13,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:13,458 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:13,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:13,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2017295833, now seen corresponding path program 24 times [2021-07-09 17:47:13,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:13,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795115137] [2021-07-09 17:47:13,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:13,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:13,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795115137] [2021-07-09 17:47:13,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795115137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:13,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104491405] [2021-07-09 17:47:13,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:13,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:47:13,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:13,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:47:13,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:13,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104491405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:13,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:13,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:47:13,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054243748] [2021-07-09 17:47:13,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:47:13,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:13,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:47:13,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:13,606 INFO L87 Difference]: Start difference. First operand 13056 states and 28787 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-07-09 17:47:13,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:13,735 INFO L93 Difference]: Finished difference Result 17393 states and 37929 transitions. [2021-07-09 17:47:13,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:13,735 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-07-09 17:47:13,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:13,760 INFO L225 Difference]: With dead ends: 17393 [2021-07-09 17:47:13,760 INFO L226 Difference]: Without dead ends: 17393 [2021-07-09 17:47:13,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:47:13,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17393 states. [2021-07-09 17:47:14,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17393 to 15686. [2021-07-09 17:47:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15686 states, 15685 states have (on average 2.224099458080969) internal successors, (34885), 15685 states have internal predecessors, (34885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:14,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15686 states to 15686 states and 34885 transitions. [2021-07-09 17:47:14,060 INFO L78 Accepts]: Start accepts. Automaton has 15686 states and 34885 transitions. Word has length 46 [2021-07-09 17:47:14,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:14,061 INFO L482 AbstractCegarLoop]: Abstraction has 15686 states and 34885 transitions. [2021-07-09 17:47:14,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-07-09 17:47:14,061 INFO L276 IsEmpty]: Start isEmpty. Operand 15686 states and 34885 transitions. [2021-07-09 17:47:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 17:47:14,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:14,077 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:14,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 17:47:14,293 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:14,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:14,293 INFO L82 PathProgramCache]: Analyzing trace with hash -847239833, now seen corresponding path program 25 times [2021-07-09 17:47:14,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:14,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948153088] [2021-07-09 17:47:14,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:14,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:14,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948153088] [2021-07-09 17:47:14,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948153088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:14,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352868949] [2021-07-09 17:47:14,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:14,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:47:14,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:14,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352868949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:14,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:14,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:47:14,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037608197] [2021-07-09 17:47:14,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:47:14,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:14,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:47:14,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:14,452 INFO L87 Difference]: Start difference. First operand 15686 states and 34885 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-07-09 17:47:14,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:14,586 INFO L93 Difference]: Finished difference Result 16911 states and 36914 transitions. [2021-07-09 17:47:14,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:14,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-07-09 17:47:14,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:14,614 INFO L225 Difference]: With dead ends: 16911 [2021-07-09 17:47:14,614 INFO L226 Difference]: Without dead ends: 16863 [2021-07-09 17:47:14,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:47:14,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16863 states. [2021-07-09 17:47:14,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16863 to 14310. [2021-07-09 17:47:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14310 states, 14309 states have (on average 2.212104270039835) internal successors, (31653), 14309 states have internal predecessors, (31653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14310 states to 14310 states and 31653 transitions. [2021-07-09 17:47:14,886 INFO L78 Accepts]: Start accepts. Automaton has 14310 states and 31653 transitions. Word has length 46 [2021-07-09 17:47:14,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:14,886 INFO L482 AbstractCegarLoop]: Abstraction has 14310 states and 31653 transitions. [2021-07-09 17:47:14,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-07-09 17:47:14,886 INFO L276 IsEmpty]: Start isEmpty. Operand 14310 states and 31653 transitions. [2021-07-09 17:47:14,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 17:47:14,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:14,898 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:15,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 17:47:15,098 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:15,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:15,099 INFO L82 PathProgramCache]: Analyzing trace with hash 910987597, now seen corresponding path program 26 times [2021-07-09 17:47:15,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:15,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918605908] [2021-07-09 17:47:15,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:15,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:15,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918605908] [2021-07-09 17:47:15,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918605908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:15,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690446782] [2021-07-09 17:47:15,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:15,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:15,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:15,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:47:15,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:15,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690446782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:15,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:15,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:15,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024046408] [2021-07-09 17:47:15,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:15,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:15,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:15,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:15,247 INFO L87 Difference]: Start difference. First operand 14310 states and 31653 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-07-09 17:47:15,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:15,410 INFO L93 Difference]: Finished difference Result 15209 states and 33173 transitions. [2021-07-09 17:47:15,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:47:15,411 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 46 [2021-07-09 17:47:15,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:15,440 INFO L225 Difference]: With dead ends: 15209 [2021-07-09 17:47:15,440 INFO L226 Difference]: Without dead ends: 15137 [2021-07-09 17:47:15,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:15,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15137 states. [2021-07-09 17:47:15,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15137 to 14314. [2021-07-09 17:47:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14314 states, 14313 states have (on average 2.2051980716830855) internal successors, (31563), 14313 states have internal predecessors, (31563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:15,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14314 states to 14314 states and 31563 transitions. [2021-07-09 17:47:15,692 INFO L78 Accepts]: Start accepts. Automaton has 14314 states and 31563 transitions. Word has length 46 [2021-07-09 17:47:15,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:15,692 INFO L482 AbstractCegarLoop]: Abstraction has 14314 states and 31563 transitions. [2021-07-09 17:47:15,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-07-09 17:47:15,693 INFO L276 IsEmpty]: Start isEmpty. Operand 14314 states and 31563 transitions. [2021-07-09 17:47:15,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 17:47:15,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:15,709 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:15,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 17:47:15,925 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:15,925 INFO L82 PathProgramCache]: Analyzing trace with hash -960627461, now seen corresponding path program 27 times [2021-07-09 17:47:15,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:15,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120227163] [2021-07-09 17:47:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:47:15,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:15,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120227163] [2021-07-09 17:47:15,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120227163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:15,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723107004] [2021-07-09 17:47:15,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:15,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:47:15,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:16,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:47:16,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:47:16,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723107004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:16,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:16,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:47:16,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733882015] [2021-07-09 17:47:16,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:47:16,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:16,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:47:16,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:16,081 INFO L87 Difference]: Start difference. First operand 14314 states and 31563 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:16,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:16,237 INFO L93 Difference]: Finished difference Result 18333 states and 40131 transitions. [2021-07-09 17:47:16,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:47:16,237 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-09 17:47:16,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:16,275 INFO L225 Difference]: With dead ends: 18333 [2021-07-09 17:47:16,275 INFO L226 Difference]: Without dead ends: 18330 [2021-07-09 17:47:16,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:47:16,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18330 states. [2021-07-09 17:47:16,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18330 to 15498. [2021-07-09 17:47:16,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15498 states, 15497 states have (on average 2.2112021681615794) internal successors, (34267), 15497 states have internal predecessors, (34267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:16,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15498 states to 15498 states and 34267 transitions. [2021-07-09 17:47:16,604 INFO L78 Accepts]: Start accepts. Automaton has 15498 states and 34267 transitions. Word has length 46 [2021-07-09 17:47:16,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:16,604 INFO L482 AbstractCegarLoop]: Abstraction has 15498 states and 34267 transitions. [2021-07-09 17:47:16,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:16,604 INFO L276 IsEmpty]: Start isEmpty. Operand 15498 states and 34267 transitions. [2021-07-09 17:47:16,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 17:47:16,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:16,622 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:16,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 17:47:16,837 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:16,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:16,837 INFO L82 PathProgramCache]: Analyzing trace with hash -674304251, now seen corresponding path program 28 times [2021-07-09 17:47:16,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:16,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151639288] [2021-07-09 17:47:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:16,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:16,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151639288] [2021-07-09 17:47:16,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151639288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:16,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796541186] [2021-07-09 17:47:16,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:16,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:16,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:16,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:47:16,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:17,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796541186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:17,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:17,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:47:17,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744883536] [2021-07-09 17:47:17,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:47:17,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:17,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:47:17,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:17,003 INFO L87 Difference]: Start difference. First operand 15498 states and 34267 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-07-09 17:47:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:17,172 INFO L93 Difference]: Finished difference Result 20808 states and 45501 transitions. [2021-07-09 17:47:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:17,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-07-09 17:47:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:17,205 INFO L225 Difference]: With dead ends: 20808 [2021-07-09 17:47:17,206 INFO L226 Difference]: Without dead ends: 20808 [2021-07-09 17:47:17,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:47:17,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20808 states. [2021-07-09 17:47:17,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20808 to 19050. [2021-07-09 17:47:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19050 states, 19049 states have (on average 2.2252611685652792) internal successors, (42389), 19049 states have internal predecessors, (42389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:17,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19050 states to 19050 states and 42389 transitions. [2021-07-09 17:47:17,472 INFO L78 Accepts]: Start accepts. Automaton has 19050 states and 42389 transitions. Word has length 46 [2021-07-09 17:47:17,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:17,472 INFO L482 AbstractCegarLoop]: Abstraction has 19050 states and 42389 transitions. [2021-07-09 17:47:17,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-07-09 17:47:17,472 INFO L276 IsEmpty]: Start isEmpty. Operand 19050 states and 42389 transitions. [2021-07-09 17:47:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 17:47:17,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:17,487 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:17,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:17,688 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:17,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:17,688 INFO L82 PathProgramCache]: Analyzing trace with hash 495751749, now seen corresponding path program 29 times [2021-07-09 17:47:17,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:17,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544385763] [2021-07-09 17:47:17,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:17,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:17,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544385763] [2021-07-09 17:47:17,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544385763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:17,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101992125] [2021-07-09 17:47:17,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:17,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:47:17,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:17,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:47:17,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:17,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101992125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:17,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:17,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:47:17,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665052752] [2021-07-09 17:47:17,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:47:17,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:17,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:47:17,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:17,827 INFO L87 Difference]: Start difference. First operand 19050 states and 42389 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-07-09 17:47:17,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:17,966 INFO L93 Difference]: Finished difference Result 20381 states and 44592 transitions. [2021-07-09 17:47:17,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:17,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-07-09 17:47:17,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:17,997 INFO L225 Difference]: With dead ends: 20381 [2021-07-09 17:47:17,998 INFO L226 Difference]: Without dead ends: 20349 [2021-07-09 17:47:17,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:47:18,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20349 states. [2021-07-09 17:47:18,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20349 to 19030. [2021-07-09 17:47:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19030 states, 19029 states have (on average 2.2227652530348414) internal successors, (42297), 19029 states have internal predecessors, (42297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:18,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 42297 transitions. [2021-07-09 17:47:18,291 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 42297 transitions. Word has length 46 [2021-07-09 17:47:18,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:18,291 INFO L482 AbstractCegarLoop]: Abstraction has 19030 states and 42297 transitions. [2021-07-09 17:47:18,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-07-09 17:47:18,291 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 42297 transitions. [2021-07-09 17:47:18,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 17:47:18,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:18,307 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:18,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-09 17:47:18,508 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:18,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:18,509 INFO L82 PathProgramCache]: Analyzing trace with hash -2040988117, now seen corresponding path program 30 times [2021-07-09 17:47:18,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:18,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619881616] [2021-07-09 17:47:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:18,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:18,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619881616] [2021-07-09 17:47:18,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619881616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:18,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512755360] [2021-07-09 17:47:18,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:18,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:47:18,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:18,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:47:18,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:18,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512755360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:18,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:18,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:18,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507564844] [2021-07-09 17:47:18,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:18,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:18,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:18,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:18,670 INFO L87 Difference]: Start difference. First operand 19030 states and 42297 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-07-09 17:47:18,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:18,851 INFO L93 Difference]: Finished difference Result 20409 states and 44584 transitions. [2021-07-09 17:47:18,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:47:18,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 46 [2021-07-09 17:47:18,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:18,896 INFO L225 Difference]: With dead ends: 20409 [2021-07-09 17:47:18,896 INFO L226 Difference]: Without dead ends: 20337 [2021-07-09 17:47:18,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20337 states. [2021-07-09 17:47:19,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20337 to 19030. [2021-07-09 17:47:19,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19030 states, 19029 states have (on average 2.216459088759262) internal successors, (42177), 19029 states have internal predecessors, (42177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:19,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 42177 transitions. [2021-07-09 17:47:19,308 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 42177 transitions. Word has length 46 [2021-07-09 17:47:19,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:19,309 INFO L482 AbstractCegarLoop]: Abstraction has 19030 states and 42177 transitions. [2021-07-09 17:47:19,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-07-09 17:47:19,310 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 42177 transitions. [2021-07-09 17:47:19,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 17:47:19,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:19,326 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:19,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 17:47:19,527 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:19,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:19,527 INFO L82 PathProgramCache]: Analyzing trace with hash -678956667, now seen corresponding path program 31 times [2021-07-09 17:47:19,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:19,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306547979] [2021-07-09 17:47:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:19,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:19,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306547979] [2021-07-09 17:47:19,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306547979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:19,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477363081] [2021-07-09 17:47:19,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:19,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:47:19,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:19,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477363081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:19,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:19,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:47:19,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090833276] [2021-07-09 17:47:19,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:47:19,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:19,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:47:19,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:19,678 INFO L87 Difference]: Start difference. First operand 19030 states and 42177 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2021-07-09 17:47:19,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:19,891 INFO L93 Difference]: Finished difference Result 20155 states and 44063 transitions. [2021-07-09 17:47:19,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:19,892 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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 46 [2021-07-09 17:47:19,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:19,934 INFO L225 Difference]: With dead ends: 20155 [2021-07-09 17:47:19,934 INFO L226 Difference]: Without dead ends: 20027 [2021-07-09 17:47:19,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20027 states. [2021-07-09 17:47:20,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20027 to 19078. [2021-07-09 17:47:20,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19078 states, 19077 states have (on average 2.210043507889081) internal successors, (42161), 19077 states have internal predecessors, (42161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:20,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19078 states to 19078 states and 42161 transitions. [2021-07-09 17:47:20,309 INFO L78 Accepts]: Start accepts. Automaton has 19078 states and 42161 transitions. Word has length 46 [2021-07-09 17:47:20,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:20,309 INFO L482 AbstractCegarLoop]: Abstraction has 19078 states and 42161 transitions. [2021-07-09 17:47:20,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2021-07-09 17:47:20,309 INFO L276 IsEmpty]: Start isEmpty. Operand 19078 states and 42161 transitions. [2021-07-09 17:47:20,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 17:47:20,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:20,324 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:20,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:20,525 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:20,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:20,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2014335335, now seen corresponding path program 32 times [2021-07-09 17:47:20,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:20,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402931994] [2021-07-09 17:47:20,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:47:20,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:20,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402931994] [2021-07-09 17:47:20,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402931994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:20,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948271034] [2021-07-09 17:47:20,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:20,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:20,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:20,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:47:20,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:47:20,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948271034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:20,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:20,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:47:20,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618288548] [2021-07-09 17:47:20,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:47:20,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:20,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:47:20,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:20,688 INFO L87 Difference]: Start difference. First operand 19078 states and 42161 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:20,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:20,866 INFO L93 Difference]: Finished difference Result 20680 states and 45191 transitions. [2021-07-09 17:47:20,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:20,866 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-09 17:47:20,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:20,903 INFO L225 Difference]: With dead ends: 20680 [2021-07-09 17:47:20,903 INFO L226 Difference]: Without dead ends: 20680 [2021-07-09 17:47:20,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:20,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20680 states. [2021-07-09 17:47:21,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20680 to 17730. [2021-07-09 17:47:21,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17730 states, 17729 states have (on average 2.2009701618816626) internal successors, (39021), 17729 states have internal predecessors, (39021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:21,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17730 states to 17730 states and 39021 transitions. [2021-07-09 17:47:21,140 INFO L78 Accepts]: Start accepts. Automaton has 17730 states and 39021 transitions. Word has length 46 [2021-07-09 17:47:21,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:21,140 INFO L482 AbstractCegarLoop]: Abstraction has 17730 states and 39021 transitions. [2021-07-09 17:47:21,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:21,140 INFO L276 IsEmpty]: Start isEmpty. Operand 17730 states and 39021 transitions. [2021-07-09 17:47:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 17:47:21,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:21,155 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:21,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 17:47:21,355 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:21,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1597815803, now seen corresponding path program 33 times [2021-07-09 17:47:21,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:21,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656301023] [2021-07-09 17:47:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:47:21,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:21,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656301023] [2021-07-09 17:47:21,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656301023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:21,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167750844] [2021-07-09 17:47:21,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:21,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:47:21,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:21,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:47:21,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:47:21,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167750844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:21,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:21,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:21,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336699700] [2021-07-09 17:47:21,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:21,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:21,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:21,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:21,502 INFO L87 Difference]: Start difference. First operand 17730 states and 39021 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:21,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:21,633 INFO L93 Difference]: Finished difference Result 19104 states and 41588 transitions. [2021-07-09 17:47:21,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:21,634 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-09 17:47:21,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:21,662 INFO L225 Difference]: With dead ends: 19104 [2021-07-09 17:47:21,662 INFO L226 Difference]: Without dead ends: 19104 [2021-07-09 17:47:21,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:21,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19104 states. [2021-07-09 17:47:21,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19104 to 17742. [2021-07-09 17:47:21,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17742 states, 17741 states have (on average 2.200834225804633) internal successors, (39045), 17741 states have internal predecessors, (39045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17742 states to 17742 states and 39045 transitions. [2021-07-09 17:47:21,898 INFO L78 Accepts]: Start accepts. Automaton has 17742 states and 39045 transitions. Word has length 46 [2021-07-09 17:47:21,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:21,898 INFO L482 AbstractCegarLoop]: Abstraction has 17742 states and 39045 transitions. [2021-07-09 17:47:21,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:21,898 INFO L276 IsEmpty]: Start isEmpty. Operand 17742 states and 39045 transitions. [2021-07-09 17:47:21,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 17:47:21,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:21,913 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:22,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:22,114 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:22,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:22,114 INFO L82 PathProgramCache]: Analyzing trace with hash -2135850713, now seen corresponding path program 34 times [2021-07-09 17:47:22,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:22,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970476262] [2021-07-09 17:47:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:22,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:22,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970476262] [2021-07-09 17:47:22,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970476262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:22,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196482025] [2021-07-09 17:47:22,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:22,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:22,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:22,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:47:22,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:22,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196482025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:22,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:22,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:47:22,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252294544] [2021-07-09 17:47:22,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:47:22,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:22,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:47:22,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:22,265 INFO L87 Difference]: Start difference. First operand 17742 states and 39045 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-07-09 17:47:22,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:22,414 INFO L93 Difference]: Finished difference Result 21829 states and 47682 transitions. [2021-07-09 17:47:22,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:22,415 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-07-09 17:47:22,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:22,457 INFO L225 Difference]: With dead ends: 21829 [2021-07-09 17:47:22,457 INFO L226 Difference]: Without dead ends: 21829 [2021-07-09 17:47:22,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:47:22,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21829 states. [2021-07-09 17:47:22,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21829 to 20406. [2021-07-09 17:47:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20406 states, 20405 states have (on average 2.2182308257779955) internal successors, (45263), 20405 states have internal predecessors, (45263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:22,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20406 states to 20406 states and 45263 transitions. [2021-07-09 17:47:22,759 INFO L78 Accepts]: Start accepts. Automaton has 20406 states and 45263 transitions. Word has length 46 [2021-07-09 17:47:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:22,759 INFO L482 AbstractCegarLoop]: Abstraction has 20406 states and 45263 transitions. [2021-07-09 17:47:22,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-07-09 17:47:22,760 INFO L276 IsEmpty]: Start isEmpty. Operand 20406 states and 45263 transitions. [2021-07-09 17:47:22,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 17:47:22,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:22,775 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:22,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 17:47:22,976 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:22,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:22,976 INFO L82 PathProgramCache]: Analyzing trace with hash -965794713, now seen corresponding path program 35 times [2021-07-09 17:47:22,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:22,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40387566] [2021-07-09 17:47:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:23,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:23,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40387566] [2021-07-09 17:47:23,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40387566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:23,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102412786] [2021-07-09 17:47:23,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:23,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:47:23,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:23,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:47:23,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:23,110 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:23,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102412786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:23,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:23,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:47:23,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519287776] [2021-07-09 17:47:23,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:47:23,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:23,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:47:23,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:23,112 INFO L87 Difference]: Start difference. First operand 20406 states and 45263 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-07-09 17:47:23,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:23,270 INFO L93 Difference]: Finished difference Result 21712 states and 47427 transitions. [2021-07-09 17:47:23,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:23,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-07-09 17:47:23,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:23,304 INFO L225 Difference]: With dead ends: 21712 [2021-07-09 17:47:23,304 INFO L226 Difference]: Without dead ends: 21704 [2021-07-09 17:47:23,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:47:23,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21704 states. [2021-07-09 17:47:23,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21704 to 20402. [2021-07-09 17:47:23,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20402 states, 20401 states have (on average 2.21768540757806) internal successors, (45243), 20401 states have internal predecessors, (45243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:23,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20402 states to 20402 states and 45243 transitions. [2021-07-09 17:47:23,574 INFO L78 Accepts]: Start accepts. Automaton has 20402 states and 45243 transitions. Word has length 46 [2021-07-09 17:47:23,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:23,575 INFO L482 AbstractCegarLoop]: Abstraction has 20402 states and 45243 transitions. [2021-07-09 17:47:23,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-07-09 17:47:23,575 INFO L276 IsEmpty]: Start isEmpty. Operand 20402 states and 45243 transitions. [2021-07-09 17:47:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 17:47:23,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:23,590 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:23,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:23,791 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:23,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:23,791 INFO L82 PathProgramCache]: Analyzing trace with hash 792432717, now seen corresponding path program 36 times [2021-07-09 17:47:23,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:23,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878590590] [2021-07-09 17:47:23,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:23,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:23,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878590590] [2021-07-09 17:47:23,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878590590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:23,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728368821] [2021-07-09 17:47:23,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:23,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:47:23,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:23,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:47:23,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:47:23,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728368821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:23,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:23,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-07-09 17:47:23,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509422078] [2021-07-09 17:47:23,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:47:23,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:23,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:47:23,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:23,939 INFO L87 Difference]: Start difference. First operand 20402 states and 45243 transitions. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:24,500 INFO L93 Difference]: Finished difference Result 28400 states and 61628 transitions. [2021-07-09 17:47:24,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:47:24,500 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-09 17:47:24,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:24,548 INFO L225 Difference]: With dead ends: 28400 [2021-07-09 17:47:24,548 INFO L226 Difference]: Without dead ends: 28376 [2021-07-09 17:47:24,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 298.2ms TimeCoverageRelationStatistics Valid=321, Invalid=1161, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:47:24,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28376 states. [2021-07-09 17:47:24,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28376 to 20402. [2021-07-09 17:47:24,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20402 states, 20401 states have (on average 2.212979755894319) internal successors, (45147), 20401 states have internal predecessors, (45147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20402 states to 20402 states and 45147 transitions. [2021-07-09 17:47:24,927 INFO L78 Accepts]: Start accepts. Automaton has 20402 states and 45147 transitions. Word has length 46 [2021-07-09 17:47:24,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:24,927 INFO L482 AbstractCegarLoop]: Abstraction has 20402 states and 45147 transitions. [2021-07-09 17:47:24,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:24,927 INFO L276 IsEmpty]: Start isEmpty. Operand 20402 states and 45147 transitions. [2021-07-09 17:47:24,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:24,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:24,949 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:25,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 17:47:25,149 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:25,150 INFO L82 PathProgramCache]: Analyzing trace with hash 2089254534, now seen corresponding path program 37 times [2021-07-09 17:47:25,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:25,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653185443] [2021-07-09 17:47:25,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:25,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:25,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653185443] [2021-07-09 17:47:25,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653185443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:25,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872799521] [2021-07-09 17:47:25,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:25,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:25,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:25,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872799521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:25,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:25,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:47:25,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891241607] [2021-07-09 17:47:25,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:47:25,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:25,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:47:25,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:47:25,346 INFO L87 Difference]: Start difference. First operand 20402 states and 45147 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:25,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:25,580 INFO L93 Difference]: Finished difference Result 25889 states and 56595 transitions. [2021-07-09 17:47:25,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:25,580 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:25,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:25,624 INFO L225 Difference]: With dead ends: 25889 [2021-07-09 17:47:25,624 INFO L226 Difference]: Without dead ends: 25889 [2021-07-09 17:47:25,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:47:25,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25889 states. [2021-07-09 17:47:25,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25889 to 21836. [2021-07-09 17:47:25,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21836 states, 21835 states have (on average 2.216762079230593) internal successors, (48403), 21835 states have internal predecessors, (48403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:25,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21836 states to 21836 states and 48403 transitions. [2021-07-09 17:47:25,930 INFO L78 Accepts]: Start accepts. Automaton has 21836 states and 48403 transitions. Word has length 56 [2021-07-09 17:47:25,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:25,930 INFO L482 AbstractCegarLoop]: Abstraction has 21836 states and 48403 transitions. [2021-07-09 17:47:25,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:25,930 INFO L276 IsEmpty]: Start isEmpty. Operand 21836 states and 48403 transitions. [2021-07-09 17:47:25,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:25,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:25,954 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:26,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 17:47:26,154 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:26,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:26,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1587046395, now seen corresponding path program 38 times [2021-07-09 17:47:26,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:26,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960517411] [2021-07-09 17:47:26,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:26,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:26,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960517411] [2021-07-09 17:47:26,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960517411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:26,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359580176] [2021-07-09 17:47:26,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:26,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:26,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:26,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:26,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:26,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359580176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:26,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:26,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:47:26,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005422707] [2021-07-09 17:47:26,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:47:26,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:26,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:47:26,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:47:26,348 INFO L87 Difference]: Start difference. First operand 21836 states and 48403 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:26,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:26,589 INFO L93 Difference]: Finished difference Result 31481 states and 69778 transitions. [2021-07-09 17:47:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:47:26,589 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:26,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:26,643 INFO L225 Difference]: With dead ends: 31481 [2021-07-09 17:47:26,644 INFO L226 Difference]: Without dead ends: 31323 [2021-07-09 17:47:26,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:47:26,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31323 states. [2021-07-09 17:47:27,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31323 to 30212. [2021-07-09 17:47:27,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30212 states, 30211 states have (on average 2.2320015888252622) internal successors, (67431), 30211 states have internal predecessors, (67431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30212 states to 30212 states and 67431 transitions. [2021-07-09 17:47:27,148 INFO L78 Accepts]: Start accepts. Automaton has 30212 states and 67431 transitions. Word has length 56 [2021-07-09 17:47:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:27,148 INFO L482 AbstractCegarLoop]: Abstraction has 30212 states and 67431 transitions. [2021-07-09 17:47:27,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:27,148 INFO L276 IsEmpty]: Start isEmpty. Operand 30212 states and 67431 transitions. [2021-07-09 17:47:27,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:27,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:27,177 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:27,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:27,378 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:27,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:27,378 INFO L82 PathProgramCache]: Analyzing trace with hash -406238257, now seen corresponding path program 39 times [2021-07-09 17:47:27,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:27,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616614389] [2021-07-09 17:47:27,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 39 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:27,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:27,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616614389] [2021-07-09 17:47:27,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616614389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:27,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336784730] [2021-07-09 17:47:27,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:27,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:47:27,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:27,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:27,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 39 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:27,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336784730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:27,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:27,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:27,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3544832] [2021-07-09 17:47:27,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:27,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:27,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:27,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:27,545 INFO L87 Difference]: Start difference. First operand 30212 states and 67431 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:27,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:27,716 INFO L93 Difference]: Finished difference Result 31139 states and 68850 transitions. [2021-07-09 17:47:27,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:27,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:27,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:27,766 INFO L225 Difference]: With dead ends: 31139 [2021-07-09 17:47:27,767 INFO L226 Difference]: Without dead ends: 31139 [2021-07-09 17:47:27,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:27,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31139 states. [2021-07-09 17:47:28,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31139 to 28244. [2021-07-09 17:47:28,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28244 states, 28243 states have (on average 2.2232411571008743) internal successors, (62791), 28243 states have internal predecessors, (62791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:28,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28244 states to 28244 states and 62791 transitions. [2021-07-09 17:47:28,174 INFO L78 Accepts]: Start accepts. Automaton has 28244 states and 62791 transitions. Word has length 56 [2021-07-09 17:47:28,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:28,174 INFO L482 AbstractCegarLoop]: Abstraction has 28244 states and 62791 transitions. [2021-07-09 17:47:28,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:28,174 INFO L276 IsEmpty]: Start isEmpty. Operand 28244 states and 62791 transitions. [2021-07-09 17:47:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:28,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:28,201 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:28,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-07-09 17:47:28,402 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:28,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:28,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1169425338, now seen corresponding path program 40 times [2021-07-09 17:47:28,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:28,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117110370] [2021-07-09 17:47:28,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:28,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:28,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117110370] [2021-07-09 17:47:28,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117110370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:28,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90631758] [2021-07-09 17:47:28,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:28,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:28,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:28,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:28,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:28,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90631758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:28,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:28,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:28,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554830632] [2021-07-09 17:47:28,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:28,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:28,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:28,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:28,561 INFO L87 Difference]: Start difference. First operand 28244 states and 62791 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:28,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:28,877 INFO L93 Difference]: Finished difference Result 29356 states and 64669 transitions. [2021-07-09 17:47:28,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:28,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:28,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:28,944 INFO L225 Difference]: With dead ends: 29356 [2021-07-09 17:47:28,944 INFO L226 Difference]: Without dead ends: 29352 [2021-07-09 17:47:28,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:28,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29352 states. [2021-07-09 17:47:29,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29352 to 27360. [2021-07-09 17:47:29,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27360 states, 27359 states have (on average 2.2246061625059395) internal successors, (60863), 27359 states have internal predecessors, (60863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:29,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27360 states to 27360 states and 60863 transitions. [2021-07-09 17:47:29,427 INFO L78 Accepts]: Start accepts. Automaton has 27360 states and 60863 transitions. Word has length 56 [2021-07-09 17:47:29,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:29,427 INFO L482 AbstractCegarLoop]: Abstraction has 27360 states and 60863 transitions. [2021-07-09 17:47:29,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:29,427 INFO L276 IsEmpty]: Start isEmpty. Operand 27360 states and 60863 transitions. [2021-07-09 17:47:29,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:29,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:29,456 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:29,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:29,657 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:29,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:29,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1352781062, now seen corresponding path program 41 times [2021-07-09 17:47:29,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:29,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824811668] [2021-07-09 17:47:29,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:29,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:29,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824811668] [2021-07-09 17:47:29,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824811668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:29,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031528088] [2021-07-09 17:47:29,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:29,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:47:29,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:29,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:29,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:29,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031528088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:29,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:29,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:29,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386917820] [2021-07-09 17:47:29,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:29,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:29,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:29,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:29,826 INFO L87 Difference]: Start difference. First operand 27360 states and 60863 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:30,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:30,056 INFO L93 Difference]: Finished difference Result 35236 states and 77241 transitions. [2021-07-09 17:47:30,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:30,056 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:30,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:30,116 INFO L225 Difference]: With dead ends: 35236 [2021-07-09 17:47:30,117 INFO L226 Difference]: Without dead ends: 35236 [2021-07-09 17:47:30,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35236 states. [2021-07-09 17:47:30,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35236 to 31608. [2021-07-09 17:47:30,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31608 states, 31607 states have (on average 2.2330180023412534) internal successors, (70579), 31607 states have internal predecessors, (70579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:30,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31608 states to 31608 states and 70579 transitions. [2021-07-09 17:47:30,599 INFO L78 Accepts]: Start accepts. Automaton has 31608 states and 70579 transitions. Word has length 56 [2021-07-09 17:47:30,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:30,599 INFO L482 AbstractCegarLoop]: Abstraction has 31608 states and 70579 transitions. [2021-07-09 17:47:30,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:30,599 INFO L276 IsEmpty]: Start isEmpty. Operand 31608 states and 70579 transitions. [2021-07-09 17:47:30,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:30,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:30,626 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:30,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:30,827 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:30,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:30,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1947231365, now seen corresponding path program 42 times [2021-07-09 17:47:30,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:30,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784837286] [2021-07-09 17:47:30,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:30,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:30,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784837286] [2021-07-09 17:47:30,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784837286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:30,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105112571] [2021-07-09 17:47:30,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:30,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:47:30,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:30,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:30,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:30,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105112571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:30,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:30,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:30,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336554449] [2021-07-09 17:47:30,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:30,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:30,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:30,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:30,994 INFO L87 Difference]: Start difference. First operand 31608 states and 70579 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:31,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:31,175 INFO L93 Difference]: Finished difference Result 34730 states and 77163 transitions. [2021-07-09 17:47:31,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:31,175 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:31,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:31,232 INFO L225 Difference]: With dead ends: 34730 [2021-07-09 17:47:31,232 INFO L226 Difference]: Without dead ends: 34724 [2021-07-09 17:47:31,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:31,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34724 states. [2021-07-09 17:47:31,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34724 to 33620. [2021-07-09 17:47:31,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33620 states, 33619 states have (on average 2.240013087837235) internal successors, (75307), 33619 states have internal predecessors, (75307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:31,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33620 states to 33620 states and 75307 transitions. [2021-07-09 17:47:31,738 INFO L78 Accepts]: Start accepts. Automaton has 33620 states and 75307 transitions. Word has length 56 [2021-07-09 17:47:31,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:31,739 INFO L482 AbstractCegarLoop]: Abstraction has 33620 states and 75307 transitions. [2021-07-09 17:47:31,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:31,739 INFO L276 IsEmpty]: Start isEmpty. Operand 33620 states and 75307 transitions. [2021-07-09 17:47:31,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:31,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:31,766 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:31,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 17:47:31,969 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:31,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:31,969 INFO L82 PathProgramCache]: Analyzing trace with hash -672843825, now seen corresponding path program 43 times [2021-07-09 17:47:31,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:31,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813873567] [2021-07-09 17:47:31,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:32,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:32,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813873567] [2021-07-09 17:47:32,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813873567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:32,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983194721] [2021-07-09 17:47:32,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:32,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:32,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:32,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983194721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:32,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:32,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:32,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570564572] [2021-07-09 17:47:32,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:32,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:32,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:32,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:32,135 INFO L87 Difference]: Start difference. First operand 33620 states and 75307 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:32,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:32,334 INFO L93 Difference]: Finished difference Result 35642 states and 78991 transitions. [2021-07-09 17:47:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:32,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:32,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:32,393 INFO L225 Difference]: With dead ends: 35642 [2021-07-09 17:47:32,393 INFO L226 Difference]: Without dead ends: 35640 [2021-07-09 17:47:32,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:32,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35640 states. [2021-07-09 17:47:32,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35640 to 33704. [2021-07-09 17:47:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33704 states, 33703 states have (on average 2.237159896745097) internal successors, (75399), 33703 states have internal predecessors, (75399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:32,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33704 states to 33704 states and 75399 transitions. [2021-07-09 17:47:32,858 INFO L78 Accepts]: Start accepts. Automaton has 33704 states and 75399 transitions. Word has length 56 [2021-07-09 17:47:32,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:32,858 INFO L482 AbstractCegarLoop]: Abstraction has 33704 states and 75399 transitions. [2021-07-09 17:47:32,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:32,858 INFO L276 IsEmpty]: Start isEmpty. Operand 33704 states and 75399 transitions. [2021-07-09 17:47:32,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:32,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:32,885 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:33,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:33,086 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:33,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:33,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1436030906, now seen corresponding path program 44 times [2021-07-09 17:47:33,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:33,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753917357] [2021-07-09 17:47:33,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:33,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:33,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753917357] [2021-07-09 17:47:33,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753917357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:33,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744769304] [2021-07-09 17:47:33,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:33,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:33,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:33,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:33,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:33,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744769304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:33,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:33,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:33,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134221876] [2021-07-09 17:47:33,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:33,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:33,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:33,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:33,256 INFO L87 Difference]: Start difference. First operand 33704 states and 75399 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:33,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:33,563 INFO L93 Difference]: Finished difference Result 35791 states and 78899 transitions. [2021-07-09 17:47:33,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:33,564 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:33,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:33,623 INFO L225 Difference]: With dead ends: 35791 [2021-07-09 17:47:33,624 INFO L226 Difference]: Without dead ends: 35723 [2021-07-09 17:47:33,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35723 states. [2021-07-09 17:47:34,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35723 to 33624. [2021-07-09 17:47:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33624 states, 33623 states have (on average 2.2343931237545727) internal successors, (75127), 33623 states have internal predecessors, (75127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33624 states to 33624 states and 75127 transitions. [2021-07-09 17:47:34,115 INFO L78 Accepts]: Start accepts. Automaton has 33624 states and 75127 transitions. Word has length 56 [2021-07-09 17:47:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:34,115 INFO L482 AbstractCegarLoop]: Abstraction has 33624 states and 75127 transitions. [2021-07-09 17:47:34,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 33624 states and 75127 transitions. [2021-07-09 17:47:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:34,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:34,143 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:34,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 17:47:34,343 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:34,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:34,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1252301819, now seen corresponding path program 45 times [2021-07-09 17:47:34,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:34,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908219148] [2021-07-09 17:47:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:34,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:34,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908219148] [2021-07-09 17:47:34,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908219148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:34,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469475126] [2021-07-09 17:47:34,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:34,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:47:34,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:34,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:34,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:34,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469475126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:34,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:34,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:47:34,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3828003] [2021-07-09 17:47:34,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:47:34,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:34,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:47:34,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:34,495 INFO L87 Difference]: Start difference. First operand 33624 states and 75127 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:34,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:34,691 INFO L93 Difference]: Finished difference Result 35258 states and 78007 transitions. [2021-07-09 17:47:34,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:34,691 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:34,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:34,750 INFO L225 Difference]: With dead ends: 35258 [2021-07-09 17:47:34,751 INFO L226 Difference]: Without dead ends: 35256 [2021-07-09 17:47:34,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:34,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35256 states. [2021-07-09 17:47:35,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35256 to 33208. [2021-07-09 17:47:35,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33208 states, 33207 states have (on average 2.2308248260908843) internal successors, (74079), 33207 states have internal predecessors, (74079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:35,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 74079 transitions. [2021-07-09 17:47:35,222 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 74079 transitions. Word has length 56 [2021-07-09 17:47:35,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:35,223 INFO L482 AbstractCegarLoop]: Abstraction has 33208 states and 74079 transitions. [2021-07-09 17:47:35,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:35,223 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 74079 transitions. [2021-07-09 17:47:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:35,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:35,252 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:35,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 17:47:35,453 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:35,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:35,453 INFO L82 PathProgramCache]: Analyzing trace with hash 322196524, now seen corresponding path program 46 times [2021-07-09 17:47:35,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:35,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775895519] [2021-07-09 17:47:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:35,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:35,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775895519] [2021-07-09 17:47:35,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775895519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:35,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690010813] [2021-07-09 17:47:35,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:35,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:35,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:35,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:35,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:35,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690010813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:35,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:35,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:47:35,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520847703] [2021-07-09 17:47:35,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:47:35,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:35,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:47:35,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:35,591 INFO L87 Difference]: Start difference. First operand 33208 states and 74079 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:35,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:35,801 INFO L93 Difference]: Finished difference Result 34889 states and 76950 transitions. [2021-07-09 17:47:35,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:47:35,802 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:35,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:35,856 INFO L225 Difference]: With dead ends: 34889 [2021-07-09 17:47:35,856 INFO L226 Difference]: Without dead ends: 34865 [2021-07-09 17:47:35,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34865 states. [2021-07-09 17:47:36,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34865 to 33208. [2021-07-09 17:47:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33208 states, 33207 states have (on average 2.2297407173186374) internal successors, (74043), 33207 states have internal predecessors, (74043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 74043 transitions. [2021-07-09 17:47:36,319 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 74043 transitions. Word has length 56 [2021-07-09 17:47:36,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:36,319 INFO L482 AbstractCegarLoop]: Abstraction has 33208 states and 74043 transitions. [2021-07-09 17:47:36,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:36,320 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 74043 transitions. [2021-07-09 17:47:36,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:36,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:36,346 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:36,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-09 17:47:36,547 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:36,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:36,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1132404711, now seen corresponding path program 47 times [2021-07-09 17:47:36,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:36,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753126112] [2021-07-09 17:47:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:47:36,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:36,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753126112] [2021-07-09 17:47:36,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753126112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:36,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590930247] [2021-07-09 17:47:36,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:36,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:47:36,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:36,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:36,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:47:36,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590930247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:36,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:36,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:36,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008753024] [2021-07-09 17:47:36,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:36,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:36,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:36,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:36,681 INFO L87 Difference]: Start difference. First operand 33208 states and 74043 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-07-09 17:47:36,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:36,909 INFO L93 Difference]: Finished difference Result 35848 states and 79532 transitions. [2021-07-09 17:47:36,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:47:36,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 56 [2021-07-09 17:47:36,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:36,989 INFO L225 Difference]: With dead ends: 35848 [2021-07-09 17:47:36,989 INFO L226 Difference]: Without dead ends: 35812 [2021-07-09 17:47:36,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:37,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35812 states. [2021-07-09 17:47:37,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35812 to 32944. [2021-07-09 17:47:37,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32944 states, 32943 states have (on average 2.231581823149076) internal successors, (73515), 32943 states have internal predecessors, (73515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:37,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32944 states to 32944 states and 73515 transitions. [2021-07-09 17:47:37,746 INFO L78 Accepts]: Start accepts. Automaton has 32944 states and 73515 transitions. Word has length 56 [2021-07-09 17:47:37,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:37,746 INFO L482 AbstractCegarLoop]: Abstraction has 32944 states and 73515 transitions. [2021-07-09 17:47:37,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-07-09 17:47:37,746 INFO L276 IsEmpty]: Start isEmpty. Operand 32944 states and 73515 transitions. [2021-07-09 17:47:37,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:37,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:37,771 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:37,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 17:47:37,972 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:37,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:37,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1848773382, now seen corresponding path program 48 times [2021-07-09 17:47:37,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:37,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296568463] [2021-07-09 17:47:37,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:38,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:38,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296568463] [2021-07-09 17:47:38,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296568463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:38,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133541992] [2021-07-09 17:47:38,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:38,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:47:38,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:38,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:38,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:38,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133541992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:38,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:38,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:38,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282909237] [2021-07-09 17:47:38,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:38,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:38,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:38,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:38,110 INFO L87 Difference]: Start difference. First operand 32944 states and 73515 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:38,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:38,307 INFO L93 Difference]: Finished difference Result 40718 states and 89870 transitions. [2021-07-09 17:47:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:38,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:38,371 INFO L225 Difference]: With dead ends: 40718 [2021-07-09 17:47:38,371 INFO L226 Difference]: Without dead ends: 40718 [2021-07-09 17:47:38,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:38,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40718 states. [2021-07-09 17:47:38,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40718 to 37152. [2021-07-09 17:47:38,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37152 states, 37151 states have (on average 2.2417431563080403) internal successors, (83283), 37151 states have internal predecessors, (83283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:39,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37152 states to 37152 states and 83283 transitions. [2021-07-09 17:47:39,144 INFO L78 Accepts]: Start accepts. Automaton has 37152 states and 83283 transitions. Word has length 56 [2021-07-09 17:47:39,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:39,145 INFO L482 AbstractCegarLoop]: Abstraction has 37152 states and 83283 transitions. [2021-07-09 17:47:39,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:39,145 INFO L276 IsEmpty]: Start isEmpty. Operand 37152 states and 83283 transitions. [2021-07-09 17:47:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:39,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:39,173 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:39,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:39,376 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:39,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:39,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1451239045, now seen corresponding path program 49 times [2021-07-09 17:47:39,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:39,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666482081] [2021-07-09 17:47:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:39,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:39,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666482081] [2021-07-09 17:47:39,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666482081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:39,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75978269] [2021-07-09 17:47:39,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:39,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:39,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:39,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75978269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:39,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:39,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:39,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391672272] [2021-07-09 17:47:39,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:39,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:39,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:39,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:39,521 INFO L87 Difference]: Start difference. First operand 37152 states and 83283 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:39,779 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-09 17:47:39,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:39,938 INFO L93 Difference]: Finished difference Result 40524 states and 90274 transitions. [2021-07-09 17:47:39,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:39,938 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:39,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:40,002 INFO L225 Difference]: With dead ends: 40524 [2021-07-09 17:47:40,002 INFO L226 Difference]: Without dead ends: 40488 [2021-07-09 17:47:40,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 251.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:40,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40488 states. [2021-07-09 17:47:40,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40488 to 36712. [2021-07-09 17:47:40,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36712 states, 36711 states have (on average 2.242025550924791) internal successors, (82307), 36711 states have internal predecessors, (82307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:40,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36712 states to 36712 states and 82307 transitions. [2021-07-09 17:47:40,642 INFO L78 Accepts]: Start accepts. Automaton has 36712 states and 82307 transitions. Word has length 56 [2021-07-09 17:47:40,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:40,643 INFO L482 AbstractCegarLoop]: Abstraction has 36712 states and 82307 transitions. [2021-07-09 17:47:40,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:40,643 INFO L276 IsEmpty]: Start isEmpty. Operand 36712 states and 82307 transitions. [2021-07-09 17:47:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:40,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:40,669 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:40,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:40,870 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:40,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:40,871 INFO L82 PathProgramCache]: Analyzing trace with hash -176851505, now seen corresponding path program 50 times [2021-07-09 17:47:40,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:40,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590777666] [2021-07-09 17:47:40,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:40,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:40,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590777666] [2021-07-09 17:47:40,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590777666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:40,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673809465] [2021-07-09 17:47:40,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:40,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:40,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:40,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:40,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:41,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673809465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:41,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:41,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:41,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078196545] [2021-07-09 17:47:41,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:41,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:41,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:41,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:41,048 INFO L87 Difference]: Start difference. First operand 36712 states and 82307 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:41,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:41,413 INFO L93 Difference]: Finished difference Result 39280 states and 87158 transitions. [2021-07-09 17:47:41,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:41,414 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:41,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:41,468 INFO L225 Difference]: With dead ends: 39280 [2021-07-09 17:47:41,469 INFO L226 Difference]: Without dead ends: 39278 [2021-07-09 17:47:41,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:41,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39278 states. [2021-07-09 17:47:42,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39278 to 36836. [2021-07-09 17:47:42,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36836 states, 36835 states have (on average 2.2415365820551107) internal successors, (82567), 36835 states have internal predecessors, (82567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:42,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36836 states to 36836 states and 82567 transitions. [2021-07-09 17:47:42,194 INFO L78 Accepts]: Start accepts. Automaton has 36836 states and 82567 transitions. Word has length 56 [2021-07-09 17:47:42,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:42,194 INFO L482 AbstractCegarLoop]: Abstraction has 36836 states and 82567 transitions. [2021-07-09 17:47:42,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:42,194 INFO L276 IsEmpty]: Start isEmpty. Operand 36836 states and 82567 transitions. [2021-07-09 17:47:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:42,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:42,222 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:42,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:42,423 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:42,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:42,423 INFO L82 PathProgramCache]: Analyzing trace with hash -940038586, now seen corresponding path program 51 times [2021-07-09 17:47:42,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:42,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029283823] [2021-07-09 17:47:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:42,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:42,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029283823] [2021-07-09 17:47:42,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029283823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:42,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303999811] [2021-07-09 17:47:42,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:42,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:47:42,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:42,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:47:42,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-07-09 17:47:42,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303999811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:42,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:42,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-09 17:47:42,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172109059] [2021-07-09 17:47:42,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:47:42,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:42,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:47:42,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:42,633 INFO L87 Difference]: Start difference. First operand 36836 states and 82567 transitions. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:43,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:43,746 INFO L93 Difference]: Finished difference Result 65704 states and 142418 transitions. [2021-07-09 17:47:43,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 17:47:43,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:43,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:43,871 INFO L225 Difference]: With dead ends: 65704 [2021-07-09 17:47:43,871 INFO L226 Difference]: Without dead ends: 65560 [2021-07-09 17:47:43,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 536.1ms TimeCoverageRelationStatistics Valid=437, Invalid=2755, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 17:47:43,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65560 states. [2021-07-09 17:47:44,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65560 to 50470. [2021-07-09 17:47:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50470 states, 50469 states have (on average 2.2044225167924867) internal successors, (111255), 50469 states have internal predecessors, (111255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:45,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50470 states to 50470 states and 111255 transitions. [2021-07-09 17:47:45,063 INFO L78 Accepts]: Start accepts. Automaton has 50470 states and 111255 transitions. Word has length 56 [2021-07-09 17:47:45,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:45,063 INFO L482 AbstractCegarLoop]: Abstraction has 50470 states and 111255 transitions. [2021-07-09 17:47:45,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:45,064 INFO L276 IsEmpty]: Start isEmpty. Operand 50470 states and 111255 transitions. [2021-07-09 17:47:45,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:45,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:45,101 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:45,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-09 17:47:45,301 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:45,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:45,302 INFO L82 PathProgramCache]: Analyzing trace with hash -756309499, now seen corresponding path program 52 times [2021-07-09 17:47:45,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:45,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29627068] [2021-07-09 17:47:45,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:45,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:45,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29627068] [2021-07-09 17:47:45,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29627068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:45,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708424819] [2021-07-09 17:47:45,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:45,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:45,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:45,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:45,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:45,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708424819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:45,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:45,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:47:45,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892657810] [2021-07-09 17:47:45,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:47:45,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:45,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:47:45,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:45,657 INFO L87 Difference]: Start difference. First operand 50470 states and 111255 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:45,930 INFO L93 Difference]: Finished difference Result 57450 states and 125218 transitions. [2021-07-09 17:47:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:47:45,931 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:46,037 INFO L225 Difference]: With dead ends: 57450 [2021-07-09 17:47:46,038 INFO L226 Difference]: Without dead ends: 57432 [2021-07-09 17:47:46,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 247.4ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:47:46,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57432 states. [2021-07-09 17:47:46,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57432 to 50730. [2021-07-09 17:47:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50730 states, 50729 states have (on average 2.2019554889708055) internal successors, (111703), 50729 states have internal predecessors, (111703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50730 states to 50730 states and 111703 transitions. [2021-07-09 17:47:47,149 INFO L78 Accepts]: Start accepts. Automaton has 50730 states and 111703 transitions. Word has length 56 [2021-07-09 17:47:47,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:47,149 INFO L482 AbstractCegarLoop]: Abstraction has 50730 states and 111703 transitions. [2021-07-09 17:47:47,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 50730 states and 111703 transitions. [2021-07-09 17:47:47,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:47,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:47,352 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:47,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:47,552 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:47,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:47,553 INFO L82 PathProgramCache]: Analyzing trace with hash 696555431, now seen corresponding path program 53 times [2021-07-09 17:47:47,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:47,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578006559] [2021-07-09 17:47:47,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:47,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:47,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578006559] [2021-07-09 17:47:47,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578006559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:47,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611498651] [2021-07-09 17:47:47,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:47,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:47:47,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:47,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:47,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:47,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611498651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:47,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:47,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:47:47,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181895656] [2021-07-09 17:47:47,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:47:47,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:47,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:47:47,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:47:47,704 INFO L87 Difference]: Start difference. First operand 50730 states and 111703 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:47,971 INFO L93 Difference]: Finished difference Result 53406 states and 116710 transitions. [2021-07-09 17:47:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:47,971 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:48,229 INFO L225 Difference]: With dead ends: 53406 [2021-07-09 17:47:48,229 INFO L226 Difference]: Without dead ends: 53388 [2021-07-09 17:47:48,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:48,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53388 states. [2021-07-09 17:47:49,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53388 to 45578. [2021-07-09 17:47:49,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45578 states, 45577 states have (on average 2.197402198477302) internal successors, (100151), 45577 states have internal predecessors, (100151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45578 states to 45578 states and 100151 transitions. [2021-07-09 17:47:49,202 INFO L78 Accepts]: Start accepts. Automaton has 45578 states and 100151 transitions. Word has length 56 [2021-07-09 17:47:49,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:49,202 INFO L482 AbstractCegarLoop]: Abstraction has 45578 states and 100151 transitions. [2021-07-09 17:47:49,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 45578 states and 100151 transitions. [2021-07-09 17:47:49,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:49,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:49,230 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:49,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 17:47:49,430 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:49,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:49,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1890704965, now seen corresponding path program 54 times [2021-07-09 17:47:49,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:49,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458941837] [2021-07-09 17:47:49,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-09 17:47:49,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:49,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458941837] [2021-07-09 17:47:49,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458941837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:49,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990622961] [2021-07-09 17:47:49,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:49,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:47:49,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:49,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:49,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-09 17:47:49,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990622961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:49,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:49,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:47:49,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010049131] [2021-07-09 17:47:49,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:47:49,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:49,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:47:49,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:49,585 INFO L87 Difference]: Start difference. First operand 45578 states and 100151 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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) [2021-07-09 17:47:50,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:50,041 INFO L93 Difference]: Finished difference Result 49711 states and 108806 transitions. [2021-07-09 17:47:50,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:50,041 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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 56 [2021-07-09 17:47:50,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:50,141 INFO L225 Difference]: With dead ends: 49711 [2021-07-09 17:47:50,141 INFO L226 Difference]: Without dead ends: 49645 [2021-07-09 17:47:50,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49645 states. [2021-07-09 17:47:51,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49645 to 48590. [2021-07-09 17:47:51,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48590 states, 48589 states have (on average 2.2018769680380332) internal successors, (106987), 48589 states have internal predecessors, (106987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48590 states to 48590 states and 106987 transitions. [2021-07-09 17:47:51,172 INFO L78 Accepts]: Start accepts. Automaton has 48590 states and 106987 transitions. Word has length 56 [2021-07-09 17:47:51,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:51,173 INFO L482 AbstractCegarLoop]: Abstraction has 48590 states and 106987 transitions. [2021-07-09 17:47:51,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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) [2021-07-09 17:47:51,173 INFO L276 IsEmpty]: Start isEmpty. Operand 48590 states and 106987 transitions. [2021-07-09 17:47:51,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:51,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:51,201 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:51,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:51,402 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:51,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:51,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1907912891, now seen corresponding path program 55 times [2021-07-09 17:47:51,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:51,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296973838] [2021-07-09 17:47:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:47:51,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:51,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296973838] [2021-07-09 17:47:51,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296973838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:51,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522673027] [2021-07-09 17:47:51,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:51,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:51,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:47:51,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522673027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:51,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:51,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:51,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754978508] [2021-07-09 17:47:51,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:51,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:51,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:51,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:51,543 INFO L87 Difference]: Start difference. First operand 48590 states and 106987 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-07-09 17:47:51,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:51,856 INFO L93 Difference]: Finished difference Result 51903 states and 113860 transitions. [2021-07-09 17:47:51,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:47:51,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 56 [2021-07-09 17:47:51,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:52,265 INFO L225 Difference]: With dead ends: 51903 [2021-07-09 17:47:52,265 INFO L226 Difference]: Without dead ends: 51867 [2021-07-09 17:47:52,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:52,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51867 states. [2021-07-09 17:47:52,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51867 to 50962. [2021-07-09 17:47:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50962 states, 50961 states have (on average 2.2042542336296385) internal successors, (112331), 50961 states have internal predecessors, (112331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50962 states to 50962 states and 112331 transitions. [2021-07-09 17:47:53,203 INFO L78 Accepts]: Start accepts. Automaton has 50962 states and 112331 transitions. Word has length 56 [2021-07-09 17:47:53,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:53,203 INFO L482 AbstractCegarLoop]: Abstraction has 50962 states and 112331 transitions. [2021-07-09 17:47:53,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-07-09 17:47:53,203 INFO L276 IsEmpty]: Start isEmpty. Operand 50962 states and 112331 transitions. [2021-07-09 17:47:53,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:53,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:53,257 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:53,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 17:47:53,457 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:53,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:53,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1397558139, now seen corresponding path program 56 times [2021-07-09 17:47:53,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:53,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804817141] [2021-07-09 17:47:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:53,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:53,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804817141] [2021-07-09 17:47:53,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804817141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:53,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761276318] [2021-07-09 17:47:53,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:53,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:53,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:53,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:53,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:53,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761276318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:53,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:53,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:53,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358972035] [2021-07-09 17:47:53,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:53,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:53,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:53,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:53,605 INFO L87 Difference]: Start difference. First operand 50962 states and 112331 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:53,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:53,872 INFO L93 Difference]: Finished difference Result 54564 states and 119631 transitions. [2021-07-09 17:47:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:53,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:53,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:53,985 INFO L225 Difference]: With dead ends: 54564 [2021-07-09 17:47:53,985 INFO L226 Difference]: Without dead ends: 54522 [2021-07-09 17:47:53,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:54,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54522 states. [2021-07-09 17:47:54,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54522 to 50922. [2021-07-09 17:47:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50922 states, 50921 states have (on average 2.2044932346183304) internal successors, (112255), 50921 states have internal predecessors, (112255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50922 states to 50922 states and 112255 transitions. [2021-07-09 17:47:55,037 INFO L78 Accepts]: Start accepts. Automaton has 50922 states and 112255 transitions. Word has length 56 [2021-07-09 17:47:55,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:55,037 INFO L482 AbstractCegarLoop]: Abstraction has 50922 states and 112255 transitions. [2021-07-09 17:47:55,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:55,037 INFO L276 IsEmpty]: Start isEmpty. Operand 50922 states and 112255 transitions. [2021-07-09 17:47:55,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:55,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:55,071 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:55,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:55,272 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:55,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:55,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1623021617, now seen corresponding path program 57 times [2021-07-09 17:47:55,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:55,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350511502] [2021-07-09 17:47:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 53 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:55,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:55,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350511502] [2021-07-09 17:47:55,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350511502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:55,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730777029] [2021-07-09 17:47:55,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:55,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:47:55,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:55,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:55,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:55,420 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 53 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:55,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730777029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:55,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:55,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:47:55,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376089429] [2021-07-09 17:47:55,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:47:55,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:55,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:47:55,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:47:55,421 INFO L87 Difference]: Start difference. First operand 50922 states and 112255 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:55,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:55,863 INFO L93 Difference]: Finished difference Result 54000 states and 117977 transitions. [2021-07-09 17:47:55,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:55,864 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:55,967 INFO L225 Difference]: With dead ends: 54000 [2021-07-09 17:47:55,967 INFO L226 Difference]: Without dead ends: 53998 [2021-07-09 17:47:55,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:56,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53998 states. [2021-07-09 17:47:56,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53998 to 51006. [2021-07-09 17:47:56,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51006 states, 51005 states have (on average 2.203842760513675) internal successors, (112407), 51005 states have internal predecessors, (112407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51006 states to 51006 states and 112407 transitions. [2021-07-09 17:47:57,097 INFO L78 Accepts]: Start accepts. Automaton has 51006 states and 112407 transitions. Word has length 56 [2021-07-09 17:47:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:57,097 INFO L482 AbstractCegarLoop]: Abstraction has 51006 states and 112407 transitions. [2021-07-09 17:47:57,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:57,097 INFO L276 IsEmpty]: Start isEmpty. Operand 51006 states and 112407 transitions. [2021-07-09 17:47:57,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:57,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:57,128 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:57,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 17:47:57,329 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:57,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:57,329 INFO L82 PathProgramCache]: Analyzing trace with hash 2092487685, now seen corresponding path program 58 times [2021-07-09 17:47:57,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:57,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783090796] [2021-07-09 17:47:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:57,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:57,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783090796] [2021-07-09 17:47:57,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783090796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:57,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074528757] [2021-07-09 17:47:57,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:57,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:57,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:57,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:57,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:57,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074528757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:57,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:57,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:47:57,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521569389] [2021-07-09 17:47:57,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:47:57,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:57,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:47:57,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:57,479 INFO L87 Difference]: Start difference. First operand 51006 states and 112407 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:57,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:57,767 INFO L93 Difference]: Finished difference Result 57784 states and 125981 transitions. [2021-07-09 17:47:57,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:47:57,768 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:57,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:57,881 INFO L225 Difference]: With dead ends: 57784 [2021-07-09 17:47:57,881 INFO L226 Difference]: Without dead ends: 57782 [2021-07-09 17:47:57,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:58,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57782 states. [2021-07-09 17:47:58,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57782 to 51426. [2021-07-09 17:47:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51426 states, 51425 states have (on average 2.202566844919786) internal successors, (113267), 51425 states have internal predecessors, (113267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:58,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51426 states to 51426 states and 113267 transitions. [2021-07-09 17:47:58,889 INFO L78 Accepts]: Start accepts. Automaton has 51426 states and 113267 transitions. Word has length 56 [2021-07-09 17:47:58,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:58,889 INFO L482 AbstractCegarLoop]: Abstraction has 51426 states and 113267 transitions. [2021-07-09 17:47:58,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:58,889 INFO L276 IsEmpty]: Start isEmpty. Operand 51426 states and 113267 transitions. [2021-07-09 17:47:58,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:47:58,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:58,922 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:59,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-07-09 17:47:59,122 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:59,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:59,122 INFO L82 PathProgramCache]: Analyzing trace with hash -749614681, now seen corresponding path program 59 times [2021-07-09 17:47:59,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:59,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798009178] [2021-07-09 17:47:59,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:59,170 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:59,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:59,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798009178] [2021-07-09 17:47:59,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798009178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:59,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944348326] [2021-07-09 17:47:59,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:59,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:47:59,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:59,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:59,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:47:59,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944348326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:59,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:59,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:47:59,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430926883] [2021-07-09 17:47:59,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:47:59,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:59,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:47:59,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:47:59,295 INFO L87 Difference]: Start difference. First operand 51426 states and 113267 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:59,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:59,843 INFO L93 Difference]: Finished difference Result 56504 states and 123265 transitions. [2021-07-09 17:47:59,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:47:59,844 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:47:59,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:59,967 INFO L225 Difference]: With dead ends: 56504 [2021-07-09 17:47:59,967 INFO L226 Difference]: Without dead ends: 56502 [2021-07-09 17:47:59,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 266.7ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56502 states. [2021-07-09 17:48:00,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56502 to 51506. [2021-07-09 17:48:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51506 states, 51505 states have (on average 2.2005436365401416) internal successors, (113339), 51505 states have internal predecessors, (113339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51506 states to 51506 states and 113339 transitions. [2021-07-09 17:48:01,079 INFO L78 Accepts]: Start accepts. Automaton has 51506 states and 113339 transitions. Word has length 56 [2021-07-09 17:48:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:01,080 INFO L482 AbstractCegarLoop]: Abstraction has 51506 states and 113339 transitions. [2021-07-09 17:48:01,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:01,080 INFO L276 IsEmpty]: Start isEmpty. Operand 51506 states and 113339 transitions. [2021-07-09 17:48:01,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:48:01,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:01,114 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:01,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:01,317 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:01,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:01,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1683881349, now seen corresponding path program 60 times [2021-07-09 17:48:01,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:01,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756253637] [2021-07-09 17:48:01,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:01,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:01,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756253637] [2021-07-09 17:48:01,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756253637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:01,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092675877] [2021-07-09 17:48:01,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:01,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:48:01,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:01,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:48:01,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:01,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092675877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:01,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:01,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:48:01,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439684781] [2021-07-09 17:48:01,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:48:01,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:01,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:48:01,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:48:01,485 INFO L87 Difference]: Start difference. First operand 51506 states and 113339 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:01,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:01,780 INFO L93 Difference]: Finished difference Result 53832 states and 117559 transitions. [2021-07-09 17:48:01,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:48:01,780 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:48:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:01,884 INFO L225 Difference]: With dead ends: 53832 [2021-07-09 17:48:01,884 INFO L226 Difference]: Without dead ends: 53830 [2021-07-09 17:48:01,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:02,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53830 states. [2021-07-09 17:48:02,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53830 to 49874. [2021-07-09 17:48:02,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49874 states, 49873 states have (on average 2.2004892426763982) internal successors, (109745), 49873 states have internal predecessors, (109745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49874 states to 49874 states and 109745 transitions. [2021-07-09 17:48:03,027 INFO L78 Accepts]: Start accepts. Automaton has 49874 states and 109745 transitions. Word has length 56 [2021-07-09 17:48:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:03,027 INFO L482 AbstractCegarLoop]: Abstraction has 49874 states and 109745 transitions. [2021-07-09 17:48:03,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 49874 states and 109745 transitions. [2021-07-09 17:48:03,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:48:03,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:03,062 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:03,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:03,263 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:03,264 INFO L82 PathProgramCache]: Analyzing trace with hash 490921767, now seen corresponding path program 61 times [2021-07-09 17:48:03,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:03,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638854650] [2021-07-09 17:48:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:48:03,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:03,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638854650] [2021-07-09 17:48:03,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638854650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:03,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297071847] [2021-07-09 17:48:03,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:03,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:48:03,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:48:03,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297071847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:03,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:03,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:48:03,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891327653] [2021-07-09 17:48:03,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:48:03,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:03,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:48:03,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:48:03,409 INFO L87 Difference]: Start difference. First operand 49874 states and 109745 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:03,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:03,888 INFO L93 Difference]: Finished difference Result 51331 states and 112086 transitions. [2021-07-09 17:48:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:48:03,889 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:48:03,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:03,989 INFO L225 Difference]: With dead ends: 51331 [2021-07-09 17:48:03,989 INFO L226 Difference]: Without dead ends: 51235 [2021-07-09 17:48:03,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:04,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51235 states. [2021-07-09 17:48:04,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51235 to 47230. [2021-07-09 17:48:04,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.193673378644477) internal successors, (103605), 47229 states have internal predecessors, (103605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:04,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103605 transitions. [2021-07-09 17:48:04,791 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103605 transitions. Word has length 56 [2021-07-09 17:48:04,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:04,792 INFO L482 AbstractCegarLoop]: Abstraction has 47230 states and 103605 transitions. [2021-07-09 17:48:04,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:04,792 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103605 transitions. [2021-07-09 17:48:04,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:48:04,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:04,823 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:05,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-09 17:48:05,024 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:05,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:05,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1012260677, now seen corresponding path program 62 times [2021-07-09 17:48:05,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:05,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284566786] [2021-07-09 17:48:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:48:05,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:05,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284566786] [2021-07-09 17:48:05,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284566786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:05,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204397652] [2021-07-09 17:48:05,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:05,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:05,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:05,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:48:05,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:48:05,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204397652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:05,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:05,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:48:05,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315993416] [2021-07-09 17:48:05,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:48:05,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:05,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:48:05,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:48:05,191 INFO L87 Difference]: Start difference. First operand 47230 states and 103605 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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) [2021-07-09 17:48:05,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:05,639 INFO L93 Difference]: Finished difference Result 48435 states and 105506 transitions. [2021-07-09 17:48:05,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:05,639 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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 56 [2021-07-09 17:48:05,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:05,734 INFO L225 Difference]: With dead ends: 48435 [2021-07-09 17:48:05,734 INFO L226 Difference]: Without dead ends: 48369 [2021-07-09 17:48:05,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:48:05,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48369 states. [2021-07-09 17:48:06,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48369 to 47230. [2021-07-09 17:48:06,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.1912172605814226) internal successors, (103489), 47229 states have internal predecessors, (103489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103489 transitions. [2021-07-09 17:48:06,781 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103489 transitions. Word has length 56 [2021-07-09 17:48:06,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:06,781 INFO L482 AbstractCegarLoop]: Abstraction has 47230 states and 103489 transitions. [2021-07-09 17:48:06,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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) [2021-07-09 17:48:06,781 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103489 transitions. [2021-07-09 17:48:06,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:48:06,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:06,815 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:07,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:07,016 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:07,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:07,016 INFO L82 PathProgramCache]: Analyzing trace with hash 955997927, now seen corresponding path program 63 times [2021-07-09 17:48:07,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:07,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97449003] [2021-07-09 17:48:07,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:48:07,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:07,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97449003] [2021-07-09 17:48:07,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97449003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:07,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732682895] [2021-07-09 17:48:07,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:07,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:48:07,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:07,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:48:07,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:48:07,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732682895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:07,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:07,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:48:07,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66929699] [2021-07-09 17:48:07,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:48:07,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:07,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:48:07,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:48:07,154 INFO L87 Difference]: Start difference. First operand 47230 states and 103489 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:07,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:07,395 INFO L93 Difference]: Finished difference Result 48187 states and 104966 transitions. [2021-07-09 17:48:07,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:48:07,395 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:48:07,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:07,477 INFO L225 Difference]: With dead ends: 48187 [2021-07-09 17:48:07,477 INFO L226 Difference]: Without dead ends: 48151 [2021-07-09 17:48:07,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:48:07,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48151 states. [2021-07-09 17:48:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48151 to 47230. [2021-07-09 17:48:08,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.1896927735078022) internal successors, (103417), 47229 states have internal predecessors, (103417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:08,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103417 transitions. [2021-07-09 17:48:08,473 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103417 transitions. Word has length 56 [2021-07-09 17:48:08,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:08,473 INFO L482 AbstractCegarLoop]: Abstraction has 47230 states and 103417 transitions. [2021-07-09 17:48:08,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:08,473 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103417 transitions. [2021-07-09 17:48:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:48:08,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:08,506 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:08,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-09 17:48:08,707 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:08,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:08,707 INFO L82 PathProgramCache]: Analyzing trace with hash 539478395, now seen corresponding path program 64 times [2021-07-09 17:48:08,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:08,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317630894] [2021-07-09 17:48:08,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:08,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:08,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317630894] [2021-07-09 17:48:08,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317630894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:08,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447295036] [2021-07-09 17:48:08,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:08,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:08,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:08,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:48:08,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:08,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447295036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:08,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:08,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:48:08,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66824582] [2021-07-09 17:48:08,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:48:08,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:08,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:48:08,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:48:08,841 INFO L87 Difference]: Start difference. First operand 47230 states and 103417 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:09,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:09,087 INFO L93 Difference]: Finished difference Result 51250 states and 111816 transitions. [2021-07-09 17:48:09,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:48:09,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:48:09,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:09,186 INFO L225 Difference]: With dead ends: 51250 [2021-07-09 17:48:09,186 INFO L226 Difference]: Without dead ends: 51244 [2021-07-09 17:48:09,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:48:09,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51244 states. [2021-07-09 17:48:10,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51244 to 50262. [2021-07-09 17:48:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50262 states, 50261 states have (on average 2.194723543104992) internal successors, (110309), 50261 states have internal predecessors, (110309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50262 states to 50262 states and 110309 transitions. [2021-07-09 17:48:10,262 INFO L78 Accepts]: Start accepts. Automaton has 50262 states and 110309 transitions. Word has length 56 [2021-07-09 17:48:10,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:10,262 INFO L482 AbstractCegarLoop]: Abstraction has 50262 states and 110309 transitions. [2021-07-09 17:48:10,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:10,262 INFO L276 IsEmpty]: Start isEmpty. Operand 50262 states and 110309 transitions. [2021-07-09 17:48:10,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:48:10,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:10,297 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:10,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:10,498 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:10,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:10,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1813865935, now seen corresponding path program 65 times [2021-07-09 17:48:10,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:10,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302938659] [2021-07-09 17:48:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:10,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:10,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302938659] [2021-07-09 17:48:10,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302938659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:10,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50895344] [2021-07-09 17:48:10,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:10,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:48:10,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:10,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:48:10,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:10,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50895344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:10,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:10,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:48:10,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141088274] [2021-07-09 17:48:10,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:48:10,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:10,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:48:10,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:48:10,653 INFO L87 Difference]: Start difference. First operand 50262 states and 110309 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:11,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:11,096 INFO L93 Difference]: Finished difference Result 52650 states and 114688 transitions. [2021-07-09 17:48:11,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:48:11,121 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:48:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:11,228 INFO L225 Difference]: With dead ends: 52650 [2021-07-09 17:48:11,228 INFO L226 Difference]: Without dead ends: 52650 [2021-07-09 17:48:11,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:48:11,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52650 states. [2021-07-09 17:48:11,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52650 to 50294. [2021-07-09 17:48:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50294 states, 50293 states have (on average 2.1945996460740065) internal successors, (110373), 50293 states have internal predecessors, (110373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:12,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50294 states to 50294 states and 110373 transitions. [2021-07-09 17:48:12,040 INFO L78 Accepts]: Start accepts. Automaton has 50294 states and 110373 transitions. Word has length 56 [2021-07-09 17:48:12,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:12,041 INFO L482 AbstractCegarLoop]: Abstraction has 50294 states and 110373 transitions. [2021-07-09 17:48:12,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:12,041 INFO L276 IsEmpty]: Start isEmpty. Operand 50294 states and 110373 transitions. [2021-07-09 17:48:12,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:48:12,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:12,077 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:12,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-09 17:48:12,277 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:12,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:12,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1234407941, now seen corresponding path program 66 times [2021-07-09 17:48:12,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:12,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538101675] [2021-07-09 17:48:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:12,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:12,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538101675] [2021-07-09 17:48:12,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538101675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:12,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598358870] [2021-07-09 17:48:12,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:12,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:48:12,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:12,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:48:12,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:12,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598358870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:12,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:12,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:48:12,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924385694] [2021-07-09 17:48:12,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:48:12,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:12,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:48:12,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:48:12,435 INFO L87 Difference]: Start difference. First operand 50294 states and 110373 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:12,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:12,937 INFO L93 Difference]: Finished difference Result 56418 states and 122592 transitions. [2021-07-09 17:48:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:48:12,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:48:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:13,052 INFO L225 Difference]: With dead ends: 56418 [2021-07-09 17:48:13,052 INFO L226 Difference]: Without dead ends: 56418 [2021-07-09 17:48:13,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:48:13,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56418 states. [2021-07-09 17:48:13,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56418 to 50454. [2021-07-09 17:48:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50454 states, 50453 states have (on average 2.193982518383446) internal successors, (110693), 50453 states have internal predecessors, (110693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:13,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50454 states to 50454 states and 110693 transitions. [2021-07-09 17:48:13,965 INFO L78 Accepts]: Start accepts. Automaton has 50454 states and 110693 transitions. Word has length 56 [2021-07-09 17:48:13,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:13,965 INFO L482 AbstractCegarLoop]: Abstraction has 50454 states and 110693 transitions. [2021-07-09 17:48:13,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:13,965 INFO L276 IsEmpty]: Start isEmpty. Operand 50454 states and 110693 transitions. [2021-07-09 17:48:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:48:14,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:14,002 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:14,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:14,203 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:14,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:14,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1607694425, now seen corresponding path program 67 times [2021-07-09 17:48:14,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:14,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786041839] [2021-07-09 17:48:14,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:14,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:14,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786041839] [2021-07-09 17:48:14,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786041839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:14,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525834646] [2021-07-09 17:48:14,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:14,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:48:14,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:14,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525834646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:14,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:14,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:48:14,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584155325] [2021-07-09 17:48:14,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:48:14,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:14,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:48:14,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:48:14,622 INFO L87 Difference]: Start difference. First operand 50454 states and 110693 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:14,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:14,930 INFO L93 Difference]: Finished difference Result 56662 states and 123166 transitions. [2021-07-09 17:48:14,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:48:14,930 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:48:14,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:15,039 INFO L225 Difference]: With dead ends: 56662 [2021-07-09 17:48:15,039 INFO L226 Difference]: Without dead ends: 56662 [2021-07-09 17:48:15,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:15,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56662 states. [2021-07-09 17:48:15,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56662 to 50614. [2021-07-09 17:48:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50614 states, 50613 states have (on average 2.1933692924742654) internal successors, (111013), 50613 states have internal predecessors, (111013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:16,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50614 states to 50614 states and 111013 transitions. [2021-07-09 17:48:16,120 INFO L78 Accepts]: Start accepts. Automaton has 50614 states and 111013 transitions. Word has length 56 [2021-07-09 17:48:16,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:16,120 INFO L482 AbstractCegarLoop]: Abstraction has 50614 states and 111013 transitions. [2021-07-09 17:48:16,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:16,120 INFO L276 IsEmpty]: Start isEmpty. Operand 50614 states and 111013 transitions. [2021-07-09 17:48:16,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:48:16,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:16,157 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:16,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 17:48:16,357 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:16,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:16,357 INFO L82 PathProgramCache]: Analyzing trace with hash 825801605, now seen corresponding path program 68 times [2021-07-09 17:48:16,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:16,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752301942] [2021-07-09 17:48:16,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:16,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:16,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752301942] [2021-07-09 17:48:16,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752301942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:16,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250527670] [2021-07-09 17:48:16,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:16,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:16,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:16,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:48:16,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:16,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250527670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:16,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:16,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:48:16,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097506330] [2021-07-09 17:48:16,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:48:16,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:16,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:48:16,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:48:16,507 INFO L87 Difference]: Start difference. First operand 50614 states and 111013 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:16,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:16,824 INFO L93 Difference]: Finished difference Result 54674 states and 118916 transitions. [2021-07-09 17:48:16,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:48:16,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:48:16,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:16,923 INFO L225 Difference]: With dead ends: 54674 [2021-07-09 17:48:16,923 INFO L226 Difference]: Without dead ends: 54674 [2021-07-09 17:48:16,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:48:16,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54674 states. [2021-07-09 17:48:17,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54674 to 50774. [2021-07-09 17:48:17,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50774 states, 50773 states have (on average 2.192759931459634) internal successors, (111333), 50773 states have internal predecessors, (111333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:18,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50774 states to 50774 states and 111333 transitions. [2021-07-09 17:48:18,064 INFO L78 Accepts]: Start accepts. Automaton has 50774 states and 111333 transitions. Word has length 56 [2021-07-09 17:48:18,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:18,064 INFO L482 AbstractCegarLoop]: Abstraction has 50774 states and 111333 transitions. [2021-07-09 17:48:18,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:18,064 INFO L276 IsEmpty]: Start isEmpty. Operand 50774 states and 111333 transitions. [2021-07-09 17:48:18,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:48:18,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:18,108 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:18,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:18,325 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:18,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:18,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1100779175, now seen corresponding path program 69 times [2021-07-09 17:48:18,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:18,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540159835] [2021-07-09 17:48:18,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:18,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:18,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540159835] [2021-07-09 17:48:18,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540159835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:18,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801082256] [2021-07-09 17:48:18,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:18,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:48:18,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:18,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:48:18,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:18,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801082256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:18,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:18,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:48:18,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432160425] [2021-07-09 17:48:18,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:48:18,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:18,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:48:18,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:48:18,520 INFO L87 Difference]: Start difference. First operand 50774 states and 111333 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:18,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:18,865 INFO L93 Difference]: Finished difference Result 52880 states and 115293 transitions. [2021-07-09 17:48:18,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:48:18,865 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:48:18,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:18,955 INFO L225 Difference]: With dead ends: 52880 [2021-07-09 17:48:18,955 INFO L226 Difference]: Without dead ends: 52880 [2021-07-09 17:48:18,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:19,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52880 states. [2021-07-09 17:48:19,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52880 to 49354. [2021-07-09 17:48:19,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49354 states, 49353 states have (on average 2.193686300731465) internal successors, (108265), 49353 states have internal predecessors, (108265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:20,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49354 states to 49354 states and 108265 transitions. [2021-07-09 17:48:20,010 INFO L78 Accepts]: Start accepts. Automaton has 49354 states and 108265 transitions. Word has length 56 [2021-07-09 17:48:20,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:20,010 INFO L482 AbstractCegarLoop]: Abstraction has 49354 states and 108265 transitions. [2021-07-09 17:48:20,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand 49354 states and 108265 transitions. [2021-07-09 17:48:20,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:20,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:20,057 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:20,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:20,258 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:20,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:20,258 INFO L82 PathProgramCache]: Analyzing trace with hash -2086693413, now seen corresponding path program 70 times [2021-07-09 17:48:20,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:20,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852937591] [2021-07-09 17:48:20,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:20,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:20,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852937591] [2021-07-09 17:48:20,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852937591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:20,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185617915] [2021-07-09 17:48:20,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:20,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:20,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:20,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:20,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:20,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185617915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:20,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:20,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:48:20,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838615908] [2021-07-09 17:48:20,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:48:20,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:20,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:48:20,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:48:20,510 INFO L87 Difference]: Start difference. First operand 49354 states and 108265 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:21,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:21,059 INFO L93 Difference]: Finished difference Result 55302 states and 120443 transitions. [2021-07-09 17:48:21,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:21,059 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:21,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:21,165 INFO L225 Difference]: With dead ends: 55302 [2021-07-09 17:48:21,165 INFO L226 Difference]: Without dead ends: 55302 [2021-07-09 17:48:21,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:48:21,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55302 states. [2021-07-09 17:48:21,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55302 to 49998. [2021-07-09 17:48:21,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49998 states, 49997 states have (on average 2.195831749904994) internal successors, (109785), 49997 states have internal predecessors, (109785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:21,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49998 states to 49998 states and 109785 transitions. [2021-07-09 17:48:21,990 INFO L78 Accepts]: Start accepts. Automaton has 49998 states and 109785 transitions. Word has length 66 [2021-07-09 17:48:21,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:21,990 INFO L482 AbstractCegarLoop]: Abstraction has 49998 states and 109785 transitions. [2021-07-09 17:48:21,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:21,990 INFO L276 IsEmpty]: Start isEmpty. Operand 49998 states and 109785 transitions. [2021-07-09 17:48:22,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:22,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:22,039 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:22,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:22,239 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:22,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:22,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1680670435, now seen corresponding path program 71 times [2021-07-09 17:48:22,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:22,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840191047] [2021-07-09 17:48:22,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:22,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:22,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840191047] [2021-07-09 17:48:22,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840191047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:22,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351745277] [2021-07-09 17:48:22,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:22,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:48:22,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:22,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:22,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:22,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351745277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:22,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:22,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:48:22,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89886682] [2021-07-09 17:48:22,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:48:22,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:22,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:48:22,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:48:22,418 INFO L87 Difference]: Start difference. First operand 49998 states and 109785 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:23,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:23,065 INFO L93 Difference]: Finished difference Result 51084 states and 111615 transitions. [2021-07-09 17:48:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:23,065 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:23,188 INFO L225 Difference]: With dead ends: 51084 [2021-07-09 17:48:23,189 INFO L226 Difference]: Without dead ends: 51076 [2021-07-09 17:48:23,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 346.2ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:48:23,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51076 states. [2021-07-09 17:48:23,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51076 to 49894. [2021-07-09 17:48:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49894 states, 49893 states have (on average 2.193995149620187) internal successors, (109465), 49893 states have internal predecessors, (109465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49894 states to 49894 states and 109465 transitions. [2021-07-09 17:48:24,033 INFO L78 Accepts]: Start accepts. Automaton has 49894 states and 109465 transitions. Word has length 66 [2021-07-09 17:48:24,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:24,033 INFO L482 AbstractCegarLoop]: Abstraction has 49894 states and 109465 transitions. [2021-07-09 17:48:24,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:24,033 INFO L276 IsEmpty]: Start isEmpty. Operand 49894 states and 109465 transitions. [2021-07-09 17:48:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:24,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:24,084 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:24,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:24,284 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:24,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:24,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1317782919, now seen corresponding path program 72 times [2021-07-09 17:48:24,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:24,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226738880] [2021-07-09 17:48:24,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:24,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:24,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226738880] [2021-07-09 17:48:24,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226738880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:24,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258165008] [2021-07-09 17:48:24,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:24,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:48:24,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:24,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:24,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:24,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258165008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:24,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:24,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:48:24,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139373325] [2021-07-09 17:48:24,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:48:24,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:24,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:48:24,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:48:24,458 INFO L87 Difference]: Start difference. First operand 49894 states and 109465 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:25,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:25,062 INFO L93 Difference]: Finished difference Result 58739 states and 127815 transitions. [2021-07-09 17:48:25,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:25,062 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:25,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:25,185 INFO L225 Difference]: With dead ends: 58739 [2021-07-09 17:48:25,185 INFO L226 Difference]: Without dead ends: 58739 [2021-07-09 17:48:25,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:48:25,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58739 states. [2021-07-09 17:48:25,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58739 to 53954. [2021-07-09 17:48:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53954 states, 53953 states have (on average 2.204678145793561) internal successors, (118949), 53953 states have internal predecessors, (118949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:26,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53954 states to 53954 states and 118949 transitions. [2021-07-09 17:48:26,338 INFO L78 Accepts]: Start accepts. Automaton has 53954 states and 118949 transitions. Word has length 66 [2021-07-09 17:48:26,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:26,338 INFO L482 AbstractCegarLoop]: Abstraction has 53954 states and 118949 transitions. [2021-07-09 17:48:26,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:26,338 INFO L276 IsEmpty]: Start isEmpty. Operand 53954 states and 118949 transitions. [2021-07-09 17:48:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:26,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:26,388 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:26,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:26,588 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:26,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:26,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1807128377, now seen corresponding path program 73 times [2021-07-09 17:48:26,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:26,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653757051] [2021-07-09 17:48:26,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:26,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:26,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653757051] [2021-07-09 17:48:26,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653757051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:26,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825007549] [2021-07-09 17:48:26,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:26,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:26,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:26,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825007549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:26,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:26,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:48:26,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640384983] [2021-07-09 17:48:26,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:48:26,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:26,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:48:26,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:48:26,752 INFO L87 Difference]: Start difference. First operand 53954 states and 118949 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:27,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:27,103 INFO L93 Difference]: Finished difference Result 56467 states and 123155 transitions. [2021-07-09 17:48:27,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:27,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:27,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:27,236 INFO L225 Difference]: With dead ends: 56467 [2021-07-09 17:48:27,236 INFO L226 Difference]: Without dead ends: 56375 [2021-07-09 17:48:27,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:48:27,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56375 states. [2021-07-09 17:48:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56375 to 51614. [2021-07-09 17:48:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51614 states, 51613 states have (on average 2.1976827543448354) internal successors, (113429), 51613 states have internal predecessors, (113429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51614 states to 51614 states and 113429 transitions. [2021-07-09 17:48:28,303 INFO L78 Accepts]: Start accepts. Automaton has 51614 states and 113429 transitions. Word has length 66 [2021-07-09 17:48:28,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:28,303 INFO L482 AbstractCegarLoop]: Abstraction has 51614 states and 113429 transitions. [2021-07-09 17:48:28,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 51614 states and 113429 transitions. [2021-07-09 17:48:28,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:28,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:28,353 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:28,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:28,554 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:28,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:28,554 INFO L82 PathProgramCache]: Analyzing trace with hash -48900947, now seen corresponding path program 74 times [2021-07-09 17:48:28,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:28,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548591097] [2021-07-09 17:48:28,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:28,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:28,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548591097] [2021-07-09 17:48:28,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548591097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:28,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742188149] [2021-07-09 17:48:28,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:28,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:28,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:28,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:28,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:28,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742188149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:28,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:28,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:48:28,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644363939] [2021-07-09 17:48:28,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:48:28,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:28,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:48:28,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:48:28,721 INFO L87 Difference]: Start difference. First operand 51614 states and 113429 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:29,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:29,224 INFO L93 Difference]: Finished difference Result 53573 states and 116784 transitions. [2021-07-09 17:48:29,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:48:29,224 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:29,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:29,320 INFO L225 Difference]: With dead ends: 53573 [2021-07-09 17:48:29,321 INFO L226 Difference]: Without dead ends: 53525 [2021-07-09 17:48:29,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:48:29,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53525 states. [2021-07-09 17:48:30,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53525 to 51614. [2021-07-09 17:48:30,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51614 states, 51613 states have (on average 2.196520256524519) internal successors, (113369), 51613 states have internal predecessors, (113369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:30,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51614 states to 51614 states and 113369 transitions. [2021-07-09 17:48:30,192 INFO L78 Accepts]: Start accepts. Automaton has 51614 states and 113369 transitions. Word has length 66 [2021-07-09 17:48:30,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:30,192 INFO L482 AbstractCegarLoop]: Abstraction has 51614 states and 113369 transitions. [2021-07-09 17:48:30,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:30,192 INFO L276 IsEmpty]: Start isEmpty. Operand 51614 states and 113369 transitions. [2021-07-09 17:48:30,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:30,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:30,242 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:30,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:30,443 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:30,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:30,443 INFO L82 PathProgramCache]: Analyzing trace with hash 2018785627, now seen corresponding path program 75 times [2021-07-09 17:48:30,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:30,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300046476] [2021-07-09 17:48:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:30,487 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:48:30,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:30,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300046476] [2021-07-09 17:48:30,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300046476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:30,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865343416] [2021-07-09 17:48:30,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:30,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:48:30,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:30,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:30,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:48:30,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865343416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:30,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:30,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:48:30,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185893680] [2021-07-09 17:48:30,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:48:30,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:30,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:48:30,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:48:30,602 INFO L87 Difference]: Start difference. First operand 51614 states and 113369 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:31,097 INFO L93 Difference]: Finished difference Result 66038 states and 143412 transitions. [2021-07-09 17:48:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:31,097 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:31,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:31,224 INFO L225 Difference]: With dead ends: 66038 [2021-07-09 17:48:31,224 INFO L226 Difference]: Without dead ends: 66011 [2021-07-09 17:48:31,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:48:31,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66011 states. [2021-07-09 17:48:32,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66011 to 55054. [2021-07-09 17:48:32,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55054 states, 55053 states have (on average 2.1976822334840973) internal successors, (120989), 55053 states have internal predecessors, (120989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55054 states to 55054 states and 120989 transitions. [2021-07-09 17:48:32,401 INFO L78 Accepts]: Start accepts. Automaton has 55054 states and 120989 transitions. Word has length 66 [2021-07-09 17:48:32,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:32,401 INFO L482 AbstractCegarLoop]: Abstraction has 55054 states and 120989 transitions. [2021-07-09 17:48:32,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:32,401 INFO L276 IsEmpty]: Start isEmpty. Operand 55054 states and 120989 transitions. [2021-07-09 17:48:32,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:32,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:32,462 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:32,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-09 17:48:32,677 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:32,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:32,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1989858459, now seen corresponding path program 76 times [2021-07-09 17:48:32,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:32,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257638474] [2021-07-09 17:48:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:32,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:32,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257638474] [2021-07-09 17:48:32,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257638474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:32,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049329560] [2021-07-09 17:48:32,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:32,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:32,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:32,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:32,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:32,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049329560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:32,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:32,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:48:32,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560973052] [2021-07-09 17:48:32,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:48:32,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:32,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:48:32,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:48:32,843 INFO L87 Difference]: Start difference. First operand 55054 states and 120989 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:33,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:33,113 INFO L93 Difference]: Finished difference Result 64613 states and 140751 transitions. [2021-07-09 17:48:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:33,113 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:33,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:33,230 INFO L225 Difference]: With dead ends: 64613 [2021-07-09 17:48:33,230 INFO L226 Difference]: Without dead ends: 64613 [2021-07-09 17:48:33,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:48:33,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64613 states. [2021-07-09 17:48:34,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64613 to 59214. [2021-07-09 17:48:34,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59214 states, 59213 states have (on average 2.2070322395419923) internal successors, (130685), 59213 states have internal predecessors, (130685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59214 states to 59214 states and 130685 transitions. [2021-07-09 17:48:34,465 INFO L78 Accepts]: Start accepts. Automaton has 59214 states and 130685 transitions. Word has length 66 [2021-07-09 17:48:34,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:34,466 INFO L482 AbstractCegarLoop]: Abstraction has 59214 states and 130685 transitions. [2021-07-09 17:48:34,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:34,466 INFO L276 IsEmpty]: Start isEmpty. Operand 59214 states and 130685 transitions. [2021-07-09 17:48:34,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:34,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:34,519 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:34,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:34,719 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:34,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:34,719 INFO L82 PathProgramCache]: Analyzing trace with hash -819802459, now seen corresponding path program 77 times [2021-07-09 17:48:34,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:34,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726867902] [2021-07-09 17:48:34,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:34,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:34,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726867902] [2021-07-09 17:48:34,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726867902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:34,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223167081] [2021-07-09 17:48:34,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:34,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:48:34,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:34,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:34,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:35,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223167081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:35,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:35,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:48:35,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686580134] [2021-07-09 17:48:35,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:48:35,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:35,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:48:35,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:48:35,083 INFO L87 Difference]: Start difference. First operand 59214 states and 130685 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:35,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:35,377 INFO L93 Difference]: Finished difference Result 61966 states and 135259 transitions. [2021-07-09 17:48:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:35,377 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:35,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:35,494 INFO L225 Difference]: With dead ends: 61966 [2021-07-09 17:48:35,495 INFO L226 Difference]: Without dead ends: 61870 [2021-07-09 17:48:35,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:48:35,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61870 states. [2021-07-09 17:48:36,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61870 to 56914. [2021-07-09 17:48:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56914 states, 56913 states have (on average 2.2002178764078506) internal successors, (125221), 56913 states have internal predecessors, (125221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56914 states to 56914 states and 125221 transitions. [2021-07-09 17:48:36,674 INFO L78 Accepts]: Start accepts. Automaton has 56914 states and 125221 transitions. Word has length 66 [2021-07-09 17:48:36,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:36,674 INFO L482 AbstractCegarLoop]: Abstraction has 56914 states and 125221 transitions. [2021-07-09 17:48:36,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:36,674 INFO L276 IsEmpty]: Start isEmpty. Operand 56914 states and 125221 transitions. [2021-07-09 17:48:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:36,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:36,728 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:36,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-09 17:48:36,929 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:36,929 INFO L82 PathProgramCache]: Analyzing trace with hash 938424971, now seen corresponding path program 78 times [2021-07-09 17:48:36,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:36,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156112720] [2021-07-09 17:48:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:36,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:36,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156112720] [2021-07-09 17:48:36,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156112720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:36,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393366322] [2021-07-09 17:48:36,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:37,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:48:37,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:37,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:37,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:37,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393366322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:37,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:37,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:48:37,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642656553] [2021-07-09 17:48:37,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:48:37,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:37,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:48:37,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:48:37,092 INFO L87 Difference]: Start difference. First operand 56914 states and 125221 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:37,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:37,635 INFO L93 Difference]: Finished difference Result 59554 states and 129655 transitions. [2021-07-09 17:48:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:48:37,636 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:37,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:37,753 INFO L225 Difference]: With dead ends: 59554 [2021-07-09 17:48:37,753 INFO L226 Difference]: Without dead ends: 59458 [2021-07-09 17:48:37,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:48:37,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59458 states. [2021-07-09 17:48:38,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59458 to 56894. [2021-07-09 17:48:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56894 states, 56893 states have (on average 2.1983548063909444) internal successors, (125071), 56893 states have internal predecessors, (125071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56894 states to 56894 states and 125071 transitions. [2021-07-09 17:48:38,717 INFO L78 Accepts]: Start accepts. Automaton has 56894 states and 125071 transitions. Word has length 66 [2021-07-09 17:48:38,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:38,717 INFO L482 AbstractCegarLoop]: Abstraction has 56894 states and 125071 transitions. [2021-07-09 17:48:38,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:38,717 INFO L276 IsEmpty]: Start isEmpty. Operand 56894 states and 125071 transitions. [2021-07-09 17:48:38,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:38,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:38,769 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:38,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:38,970 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:38,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:38,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1994510875, now seen corresponding path program 79 times [2021-07-09 17:48:38,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:38,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320518855] [2021-07-09 17:48:38,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:39,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:39,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320518855] [2021-07-09 17:48:39,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320518855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:39,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996580590] [2021-07-09 17:48:39,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:39,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:39,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:39,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996580590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:39,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:39,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:48:39,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748050148] [2021-07-09 17:48:39,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:48:39,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:39,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:48:39,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:48:39,345 INFO L87 Difference]: Start difference. First operand 56894 states and 125071 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:39,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:39,652 INFO L93 Difference]: Finished difference Result 59114 states and 128843 transitions. [2021-07-09 17:48:39,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:48:39,653 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:39,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:39,765 INFO L225 Difference]: With dead ends: 59114 [2021-07-09 17:48:39,765 INFO L226 Difference]: Without dead ends: 58982 [2021-07-09 17:48:39,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58982 states. [2021-07-09 17:48:40,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58982 to 56922. [2021-07-09 17:48:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56922 states, 56921 states have (on average 2.1963950036014825) internal successors, (125021), 56921 states have internal predecessors, (125021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:40,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56922 states to 56922 states and 125021 transitions. [2021-07-09 17:48:40,901 INFO L78 Accepts]: Start accepts. Automaton has 56922 states and 125021 transitions. Word has length 66 [2021-07-09 17:48:40,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:40,901 INFO L482 AbstractCegarLoop]: Abstraction has 56922 states and 125021 transitions. [2021-07-09 17:48:40,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:40,901 INFO L276 IsEmpty]: Start isEmpty. Operand 56922 states and 125021 transitions. [2021-07-09 17:48:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:40,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:40,954 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:41,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:41,154 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:41,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:41,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1160705883, now seen corresponding path program 80 times [2021-07-09 17:48:41,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:41,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234720943] [2021-07-09 17:48:41,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:48:41,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:41,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234720943] [2021-07-09 17:48:41,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234720943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:41,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610572776] [2021-07-09 17:48:41,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:41,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:41,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:41,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:41,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:48:41,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610572776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:41,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:41,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:48:41,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397309846] [2021-07-09 17:48:41,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:48:41,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:41,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:48:41,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:48:41,324 INFO L87 Difference]: Start difference. First operand 56922 states and 125021 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:41,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:41,901 INFO L93 Difference]: Finished difference Result 69297 states and 150869 transitions. [2021-07-09 17:48:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:48:41,902 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:41,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:42,045 INFO L225 Difference]: With dead ends: 69297 [2021-07-09 17:48:42,046 INFO L226 Difference]: Without dead ends: 69270 [2021-07-09 17:48:42,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:48:42,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69270 states. [2021-07-09 17:48:42,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69270 to 56622. [2021-07-09 17:48:42,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56622 states, 56621 states have (on average 2.1971529997704033) internal successors, (124405), 56621 states have internal predecessors, (124405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:43,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56622 states to 56622 states and 124405 transitions. [2021-07-09 17:48:43,021 INFO L78 Accepts]: Start accepts. Automaton has 56622 states and 124405 transitions. Word has length 66 [2021-07-09 17:48:43,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:43,022 INFO L482 AbstractCegarLoop]: Abstraction has 56622 states and 124405 transitions. [2021-07-09 17:48:43,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:43,022 INFO L276 IsEmpty]: Start isEmpty. Operand 56622 states and 124405 transitions. [2021-07-09 17:48:43,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:43,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:43,071 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:43,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:43,272 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:43,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:43,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1722006663, now seen corresponding path program 81 times [2021-07-09 17:48:43,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:43,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660870163] [2021-07-09 17:48:43,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 19 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:43,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:43,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660870163] [2021-07-09 17:48:43,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660870163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:43,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162603569] [2021-07-09 17:48:43,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:43,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 17:48:43,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:43,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:43,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 19 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:43,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162603569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:43,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:43,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:48:43,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748060715] [2021-07-09 17:48:43,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:48:43,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:43,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:48:43,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:48:43,697 INFO L87 Difference]: Start difference. First operand 56622 states and 124405 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:43,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:43,974 INFO L93 Difference]: Finished difference Result 67026 states and 146165 transitions. [2021-07-09 17:48:43,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:43,974 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:43,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:44,095 INFO L225 Difference]: With dead ends: 67026 [2021-07-09 17:48:44,095 INFO L226 Difference]: Without dead ends: 67023 [2021-07-09 17:48:44,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:48:44,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67023 states. [2021-07-09 17:48:45,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67023 to 62354. [2021-07-09 17:48:45,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62354 states, 62353 states have (on average 2.206229050727311) internal successors, (137565), 62353 states have internal predecessors, (137565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:45,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62354 states to 62354 states and 137565 transitions. [2021-07-09 17:48:45,305 INFO L78 Accepts]: Start accepts. Automaton has 62354 states and 137565 transitions. Word has length 66 [2021-07-09 17:48:45,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:45,305 INFO L482 AbstractCegarLoop]: Abstraction has 62354 states and 137565 transitions. [2021-07-09 17:48:45,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:45,305 INFO L276 IsEmpty]: Start isEmpty. Operand 62354 states and 137565 transitions. [2021-07-09 17:48:45,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:45,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:45,356 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:45,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:45,557 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:45,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:45,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1402904633, now seen corresponding path program 82 times [2021-07-09 17:48:45,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:45,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001360690] [2021-07-09 17:48:45,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:45,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:45,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001360690] [2021-07-09 17:48:45,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001360690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:45,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146442091] [2021-07-09 17:48:45,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:45,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:45,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:45,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:45,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:45,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146442091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:45,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:45,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:48:45,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992799597] [2021-07-09 17:48:45,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:48:45,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:45,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:48:45,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:48:45,699 INFO L87 Difference]: Start difference. First operand 62354 states and 137565 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:46,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:46,243 INFO L93 Difference]: Finished difference Result 65089 states and 142128 transitions. [2021-07-09 17:48:46,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:46,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:46,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:46,366 INFO L225 Difference]: With dead ends: 65089 [2021-07-09 17:48:46,366 INFO L226 Difference]: Without dead ends: 65029 [2021-07-09 17:48:46,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:48:46,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65029 states. [2021-07-09 17:48:47,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65029 to 59590. [2021-07-09 17:48:47,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.20163117353874) internal successors, (131193), 59589 states have internal predecessors, (131193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:47,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 131193 transitions. [2021-07-09 17:48:47,609 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 131193 transitions. Word has length 66 [2021-07-09 17:48:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:47,609 INFO L482 AbstractCegarLoop]: Abstraction has 59590 states and 131193 transitions. [2021-07-09 17:48:47,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:47,609 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 131193 transitions. [2021-07-09 17:48:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:47,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:47,660 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:47,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:47,862 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:47,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:47,862 INFO L82 PathProgramCache]: Analyzing trace with hash 355322797, now seen corresponding path program 83 times [2021-07-09 17:48:47,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:47,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758008650] [2021-07-09 17:48:47,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:47,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:47,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758008650] [2021-07-09 17:48:47,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758008650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:47,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151629511] [2021-07-09 17:48:47,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:47,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:48:47,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:47,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:47,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:48,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151629511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:48,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:48,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:48:48,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082597265] [2021-07-09 17:48:48,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:48:48,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:48,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:48:48,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:48:48,021 INFO L87 Difference]: Start difference. First operand 59590 states and 131193 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:48,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:48,338 INFO L93 Difference]: Finished difference Result 62315 states and 135765 transitions. [2021-07-09 17:48:48,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:48:48,338 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:48,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:48,698 INFO L225 Difference]: With dead ends: 62315 [2021-07-09 17:48:48,699 INFO L226 Difference]: Without dead ends: 62243 [2021-07-09 17:48:48,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:48:48,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62243 states. [2021-07-09 17:48:49,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62243 to 59590. [2021-07-09 17:48:49,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.1996173790464684) internal successors, (131073), 59589 states have internal predecessors, (131073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:49,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 131073 transitions. [2021-07-09 17:48:49,677 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 131073 transitions. Word has length 66 [2021-07-09 17:48:49,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:49,677 INFO L482 AbstractCegarLoop]: Abstraction has 59590 states and 131073 transitions. [2021-07-09 17:48:49,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:49,677 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 131073 transitions. [2021-07-09 17:48:49,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:49,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:49,726 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:49,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:49,927 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:49,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:49,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1717354247, now seen corresponding path program 84 times [2021-07-09 17:48:49,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:49,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282792082] [2021-07-09 17:48:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:49,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:49,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282792082] [2021-07-09 17:48:49,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282792082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:49,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503192564] [2021-07-09 17:48:49,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:50,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 17:48:50,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:50,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:50,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:50,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503192564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:50,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:50,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:48:50,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809201423] [2021-07-09 17:48:50,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:48:50,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:50,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:48:50,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:48:50,359 INFO L87 Difference]: Start difference. First operand 59590 states and 131073 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:50,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:50,700 INFO L93 Difference]: Finished difference Result 62467 states and 135889 transitions. [2021-07-09 17:48:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:48:50,700 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:50,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:50,817 INFO L225 Difference]: With dead ends: 62467 [2021-07-09 17:48:50,817 INFO L226 Difference]: Without dead ends: 62335 [2021-07-09 17:48:50,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62335 states. [2021-07-09 17:48:51,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62335 to 59590. [2021-07-09 17:48:51,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.1969323197234387) internal successors, (130913), 59589 states have internal predecessors, (130913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 130913 transitions. [2021-07-09 17:48:52,029 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 130913 transitions. Word has length 66 [2021-07-09 17:48:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:52,030 INFO L482 AbstractCegarLoop]: Abstraction has 59590 states and 130913 transitions. [2021-07-09 17:48:52,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 130913 transitions. [2021-07-09 17:48:52,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:52,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:52,084 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:52,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-09 17:48:52,285 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:52,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:52,285 INFO L82 PathProgramCache]: Analyzing trace with hash 122641389, now seen corresponding path program 85 times [2021-07-09 17:48:52,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:52,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675519505] [2021-07-09 17:48:52,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:52,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:52,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675519505] [2021-07-09 17:48:52,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675519505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:52,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426804452] [2021-07-09 17:48:52,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:52,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:52,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:52,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:52,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426804452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:52,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:52,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:48:52,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382419540] [2021-07-09 17:48:52,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:48:52,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:52,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:48:52,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:48:52,469 INFO L87 Difference]: Start difference. First operand 59590 states and 130913 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:53,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:53,079 INFO L93 Difference]: Finished difference Result 62011 states and 135009 transitions. [2021-07-09 17:48:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:48:53,079 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:53,195 INFO L225 Difference]: With dead ends: 62011 [2021-07-09 17:48:53,195 INFO L226 Difference]: Without dead ends: 61819 [2021-07-09 17:48:53,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:53,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61819 states. [2021-07-09 17:48:54,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61819 to 59670. [2021-07-09 17:48:54,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59670 states, 59669 states have (on average 2.193383498969314) internal successors, (130877), 59669 states have internal predecessors, (130877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:54,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59670 states to 59670 states and 130877 transitions. [2021-07-09 17:48:54,415 INFO L78 Accepts]: Start accepts. Automaton has 59670 states and 130877 transitions. Word has length 66 [2021-07-09 17:48:54,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:54,415 INFO L482 AbstractCegarLoop]: Abstraction has 59670 states and 130877 transitions. [2021-07-09 17:48:54,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:54,415 INFO L276 IsEmpty]: Start isEmpty. Operand 59670 states and 130877 transitions. [2021-07-09 17:48:54,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:54,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:54,464 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:54,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:54,664 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:54,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:54,665 INFO L82 PathProgramCache]: Analyzing trace with hash 911935387, now seen corresponding path program 86 times [2021-07-09 17:48:54,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:54,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39612021] [2021-07-09 17:48:54,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-09 17:48:54,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:54,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39612021] [2021-07-09 17:48:54,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39612021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:54,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687340888] [2021-07-09 17:48:54,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:54,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:54,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:54,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:54,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-09 17:48:54,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687340888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:54,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:54,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:48:54,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400825447] [2021-07-09 17:48:54,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:48:54,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:54,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:48:54,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:48:54,847 INFO L87 Difference]: Start difference. First operand 59670 states and 130877 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:55,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:55,150 INFO L93 Difference]: Finished difference Result 65831 states and 143283 transitions. [2021-07-09 17:48:55,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:48:55,150 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:55,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:55,271 INFO L225 Difference]: With dead ends: 65831 [2021-07-09 17:48:55,271 INFO L226 Difference]: Without dead ends: 65774 [2021-07-09 17:48:55,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:55,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65774 states. [2021-07-09 17:48:56,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65774 to 55516. [2021-07-09 17:48:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55516 states, 55515 states have (on average 2.1908132937044043) internal successors, (121623), 55515 states have internal predecessors, (121623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:56,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55516 states to 55516 states and 121623 transitions. [2021-07-09 17:48:56,627 INFO L78 Accepts]: Start accepts. Automaton has 55516 states and 121623 transitions. Word has length 66 [2021-07-09 17:48:56,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:56,627 INFO L482 AbstractCegarLoop]: Abstraction has 55516 states and 121623 transitions. [2021-07-09 17:48:56,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:56,627 INFO L276 IsEmpty]: Start isEmpty. Operand 55516 states and 121623 transitions. [2021-07-09 17:48:56,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:56,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:56,706 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:56,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-07-09 17:48:56,929 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:56,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:56,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1538924891, now seen corresponding path program 87 times [2021-07-09 17:48:56,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:56,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582467761] [2021-07-09 17:48:56,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:48:56,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:56,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582467761] [2021-07-09 17:48:56,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582467761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:56,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370982203] [2021-07-09 17:48:56,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:57,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:48:57,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:57,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:57,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:48:57,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370982203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:57,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:57,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:48:57,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001038342] [2021-07-09 17:48:57,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:48:57,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:57,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:48:57,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:48:57,101 INFO L87 Difference]: Start difference. First operand 55516 states and 121623 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:57,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:57,385 INFO L93 Difference]: Finished difference Result 61581 states and 133847 transitions. [2021-07-09 17:48:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:48:57,385 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:57,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:57,495 INFO L225 Difference]: With dead ends: 61581 [2021-07-09 17:48:57,495 INFO L226 Difference]: Without dead ends: 61554 [2021-07-09 17:48:57,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:48:57,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61554 states. [2021-07-09 17:48:58,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61554 to 54860. [2021-07-09 17:48:58,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54860 states, 54859 states have (on average 2.1912721704733955) internal successors, (120211), 54859 states have internal predecessors, (120211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:58,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54860 states to 54860 states and 120211 transitions. [2021-07-09 17:48:58,626 INFO L78 Accepts]: Start accepts. Automaton has 54860 states and 120211 transitions. Word has length 66 [2021-07-09 17:48:58,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:58,626 INFO L482 AbstractCegarLoop]: Abstraction has 54860 states and 120211 transitions. [2021-07-09 17:48:58,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:58,627 INFO L276 IsEmpty]: Start isEmpty. Operand 54860 states and 120211 transitions. [2021-07-09 17:48:58,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:48:58,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:58,679 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:58,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:58,879 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:58,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:58,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2108008795, now seen corresponding path program 88 times [2021-07-09 17:48:58,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:58,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732290082] [2021-07-09 17:48:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:48:58,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:58,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732290082] [2021-07-09 17:48:58,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732290082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:58,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92975024] [2021-07-09 17:48:58,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:58,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:58,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:58,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:58,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:48:59,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92975024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:59,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:59,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:48:59,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272517880] [2021-07-09 17:48:59,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:48:59,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:59,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:48:59,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:48:59,050 INFO L87 Difference]: Start difference. First operand 54860 states and 120211 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:59,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:59,542 INFO L93 Difference]: Finished difference Result 62633 states and 136579 transitions. [2021-07-09 17:48:59,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:48:59,543 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:48:59,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:59,666 INFO L225 Difference]: With dead ends: 62633 [2021-07-09 17:48:59,666 INFO L226 Difference]: Without dead ends: 62630 [2021-07-09 17:48:59,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:48:59,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62630 states. [2021-07-09 17:49:00,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62630 to 56940. [2021-07-09 17:49:00,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56940 states, 56939 states have (on average 2.195525035564376) internal successors, (125011), 56939 states have internal predecessors, (125011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56940 states to 56940 states and 125011 transitions. [2021-07-09 17:49:00,922 INFO L78 Accepts]: Start accepts. Automaton has 56940 states and 125011 transitions. Word has length 66 [2021-07-09 17:49:00,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:00,923 INFO L482 AbstractCegarLoop]: Abstraction has 56940 states and 125011 transitions. [2021-07-09 17:49:00,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:00,923 INFO L276 IsEmpty]: Start isEmpty. Operand 56940 states and 125011 transitions. [2021-07-09 17:49:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:49:00,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:00,978 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:01,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-09 17:49:01,179 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:01,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:01,179 INFO L82 PathProgramCache]: Analyzing trace with hash -15342363, now seen corresponding path program 89 times [2021-07-09 17:49:01,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:01,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278504892] [2021-07-09 17:49:01,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 22 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:01,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:01,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278504892] [2021-07-09 17:49:01,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278504892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:01,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170983741] [2021-07-09 17:49:01,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:01,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 17:49:01,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:01,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:01,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 22 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:01,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170983741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:01,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:01,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:49:01,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067027780] [2021-07-09 17:49:01,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:49:01,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:01,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:49:01,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:49:01,354 INFO L87 Difference]: Start difference. First operand 56940 states and 125011 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:01,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:01,698 INFO L93 Difference]: Finished difference Result 66890 states and 145747 transitions. [2021-07-09 17:49:01,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:49:01,699 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:49:01,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:01,821 INFO L225 Difference]: With dead ends: 66890 [2021-07-09 17:49:01,821 INFO L226 Difference]: Without dead ends: 66890 [2021-07-09 17:49:01,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:49:01,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66890 states. [2021-07-09 17:49:02,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66890 to 62652. [2021-07-09 17:49:02,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62652 states, 62651 states have (on average 2.2049288917974175) internal successors, (138141), 62651 states have internal predecessors, (138141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:03,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62652 states to 62652 states and 138141 transitions. [2021-07-09 17:49:03,029 INFO L78 Accepts]: Start accepts. Automaton has 62652 states and 138141 transitions. Word has length 66 [2021-07-09 17:49:03,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:03,029 INFO L482 AbstractCegarLoop]: Abstraction has 62652 states and 138141 transitions. [2021-07-09 17:49:03,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:03,029 INFO L276 IsEmpty]: Start isEmpty. Operand 62652 states and 138141 transitions. [2021-07-09 17:49:03,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:49:03,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:03,084 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:03,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-09 17:49:03,289 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:03,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:03,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1154713637, now seen corresponding path program 90 times [2021-07-09 17:49:03,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:03,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582651863] [2021-07-09 17:49:03,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:03,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:03,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582651863] [2021-07-09 17:49:03,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582651863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:03,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551085391] [2021-07-09 17:49:03,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:03,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 17:49:03,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:03,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:03,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 27 proven. 74 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-07-09 17:49:03,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551085391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:03,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:03,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-09 17:49:03,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875869448] [2021-07-09 17:49:03,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:49:03,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:03,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:49:03,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:49:03,500 INFO L87 Difference]: Start difference. First operand 62652 states and 138141 transitions. Second operand has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:05,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:05,180 INFO L93 Difference]: Finished difference Result 90468 states and 195554 transitions. [2021-07-09 17:49:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 17:49:05,181 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:49:05,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:05,343 INFO L225 Difference]: With dead ends: 90468 [2021-07-09 17:49:05,344 INFO L226 Difference]: Without dead ends: 90440 [2021-07-09 17:49:05,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 600.4ms TimeCoverageRelationStatistics Valid=788, Invalid=4182, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 17:49:05,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90440 states. [2021-07-09 17:49:06,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90440 to 64804. [2021-07-09 17:49:06,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64804 states, 64803 states have (on average 2.2016727620634846) internal successors, (142675), 64803 states have internal predecessors, (142675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:06,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64804 states to 64804 states and 142675 transitions. [2021-07-09 17:49:06,656 INFO L78 Accepts]: Start accepts. Automaton has 64804 states and 142675 transitions. Word has length 66 [2021-07-09 17:49:06,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:06,656 INFO L482 AbstractCegarLoop]: Abstraction has 64804 states and 142675 transitions. [2021-07-09 17:49:06,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:06,656 INFO L276 IsEmpty]: Start isEmpty. Operand 64804 states and 142675 transitions. [2021-07-09 17:49:06,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:49:06,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:06,709 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:06,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 17:49:06,910 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:06,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:06,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1621024692, now seen corresponding path program 91 times [2021-07-09 17:49:06,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:06,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323649869] [2021-07-09 17:49:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 51 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:06,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:06,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323649869] [2021-07-09 17:49:06,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323649869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:06,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219669956] [2021-07-09 17:49:06,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:06,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:49:06,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 44 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 17:49:07,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219669956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:07,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:07,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-07-09 17:49:07,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984513678] [2021-07-09 17:49:07,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:49:07,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:07,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:49:07,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:49:07,061 INFO L87 Difference]: Start difference. First operand 64804 states and 142675 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:07,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:07,616 INFO L93 Difference]: Finished difference Result 71842 states and 157251 transitions. [2021-07-09 17:49:07,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:49:07,616 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:49:07,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:07,746 INFO L225 Difference]: With dead ends: 71842 [2021-07-09 17:49:07,746 INFO L226 Difference]: Without dead ends: 71794 [2021-07-09 17:49:07,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:49:07,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71794 states. [2021-07-09 17:49:08,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71794 to 64804. [2021-07-09 17:49:08,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64804 states, 64803 states have (on average 2.2010555066895052) internal successors, (142635), 64803 states have internal predecessors, (142635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:09,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64804 states to 64804 states and 142635 transitions. [2021-07-09 17:49:09,066 INFO L78 Accepts]: Start accepts. Automaton has 64804 states and 142635 transitions. Word has length 66 [2021-07-09 17:49:09,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:09,066 INFO L482 AbstractCegarLoop]: Abstraction has 64804 states and 142635 transitions. [2021-07-09 17:49:09,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:09,066 INFO L276 IsEmpty]: Start isEmpty. Operand 64804 states and 142635 transitions. [2021-07-09 17:49:09,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:49:09,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:09,121 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:09,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:09,322 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:09,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:09,322 INFO L82 PathProgramCache]: Analyzing trace with hash -2111134938, now seen corresponding path program 92 times [2021-07-09 17:49:09,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:09,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728103894] [2021-07-09 17:49:09,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 52 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:09,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:09,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728103894] [2021-07-09 17:49:09,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728103894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:09,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804894722] [2021-07-09 17:49:09,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:09,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:09,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:09,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:49:09,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 64 proven. 52 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 17:49:09,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804894722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:09,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:09,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-07-09 17:49:09,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135203651] [2021-07-09 17:49:09,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:49:09,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:09,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:49:09,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:49:09,487 INFO L87 Difference]: Start difference. First operand 64804 states and 142635 transitions. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:10,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:10,050 INFO L93 Difference]: Finished difference Result 72032 states and 157512 transitions. [2021-07-09 17:49:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:49:10,050 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:49:10,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:10,179 INFO L225 Difference]: With dead ends: 72032 [2021-07-09 17:49:10,180 INFO L226 Difference]: Without dead ends: 71944 [2021-07-09 17:49:10,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:49:10,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71944 states. [2021-07-09 17:49:11,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71944 to 66864. [2021-07-09 17:49:11,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66864 states, 66863 states have (on average 2.2050910069844307) internal successors, (147439), 66863 states have internal predecessors, (147439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:11,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66864 states to 66864 states and 147439 transitions. [2021-07-09 17:49:11,561 INFO L78 Accepts]: Start accepts. Automaton has 66864 states and 147439 transitions. Word has length 66 [2021-07-09 17:49:11,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:11,561 INFO L482 AbstractCegarLoop]: Abstraction has 66864 states and 147439 transitions. [2021-07-09 17:49:11,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:11,561 INFO L276 IsEmpty]: Start isEmpty. Operand 66864 states and 147439 transitions. [2021-07-09 17:49:11,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-09 17:49:11,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:11,611 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:11,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-09 17:49:11,813 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:11,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:11,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1306570612, now seen corresponding path program 93 times [2021-07-09 17:49:11,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:11,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764363146] [2021-07-09 17:49:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 62 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:11,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:11,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764363146] [2021-07-09 17:49:11,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764363146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:11,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848371111] [2021-07-09 17:49:11,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:12,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:49:12,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:12,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:49:12,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-07-09 17:49:12,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848371111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:12,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:12,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-07-09 17:49:12,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577891395] [2021-07-09 17:49:12,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:49:12,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:12,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:49:12,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:49:12,310 INFO L87 Difference]: Start difference. First operand 66864 states and 147439 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:14,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:14,243 INFO L93 Difference]: Finished difference Result 139029 states and 299640 transitions. [2021-07-09 17:49:14,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-07-09 17:49:14,244 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-07-09 17:49:14,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:14,530 INFO L225 Difference]: With dead ends: 139029 [2021-07-09 17:49:14,530 INFO L226 Difference]: Without dead ends: 138261 [2021-07-09 17:49:14,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3539 ImplicationChecksByTransitivity, 916.5ms TimeCoverageRelationStatistics Valid=961, Invalid=9139, Unknown=0, NotChecked=0, Total=10100 [2021-07-09 17:49:14,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138261 states. [2021-07-09 17:49:16,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138261 to 102720. [2021-07-09 17:49:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102720 states, 102719 states have (on average 2.1767637924824035) internal successors, (223595), 102719 states have internal predecessors, (223595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:17,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102720 states to 102720 states and 223595 transitions. [2021-07-09 17:49:17,023 INFO L78 Accepts]: Start accepts. Automaton has 102720 states and 223595 transitions. Word has length 66 [2021-07-09 17:49:17,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:17,023 INFO L482 AbstractCegarLoop]: Abstraction has 102720 states and 223595 transitions. [2021-07-09 17:49:17,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:17,023 INFO L276 IsEmpty]: Start isEmpty. Operand 102720 states and 223595 transitions. [2021-07-09 17:49:17,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:49:17,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:17,123 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:17,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:17,324 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:17,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:17,324 INFO L82 PathProgramCache]: Analyzing trace with hash 2033066651, now seen corresponding path program 94 times [2021-07-09 17:49:17,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:17,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816342422] [2021-07-09 17:49:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 100 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:17,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:17,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816342422] [2021-07-09 17:49:17,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816342422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:17,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774260636] [2021-07-09 17:49:17,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:17,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:49:17,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:17,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:49:17,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 100 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:17,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774260636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:17,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:17,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-09 17:49:17,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172901808] [2021-07-09 17:49:17,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:49:17,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:17,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:49:17,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:49:17,980 INFO L87 Difference]: Start difference. First operand 102720 states and 223595 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:18,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:18,691 INFO L93 Difference]: Finished difference Result 133769 states and 293050 transitions. [2021-07-09 17:49:18,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:49:18,691 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:49:18,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:19,304 INFO L225 Difference]: With dead ends: 133769 [2021-07-09 17:49:19,304 INFO L226 Difference]: Without dead ends: 133551 [2021-07-09 17:49:19,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 560.2ms TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:49:19,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133551 states. [2021-07-09 17:49:21,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133551 to 130358. [2021-07-09 17:49:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130358 states, 130357 states have (on average 2.1991991224099974) internal successors, (286681), 130357 states have internal predecessors, (286681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:22,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130358 states to 130358 states and 286681 transitions. [2021-07-09 17:49:22,199 INFO L78 Accepts]: Start accepts. Automaton has 130358 states and 286681 transitions. Word has length 76 [2021-07-09 17:49:22,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:22,200 INFO L482 AbstractCegarLoop]: Abstraction has 130358 states and 286681 transitions. [2021-07-09 17:49:22,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:22,200 INFO L276 IsEmpty]: Start isEmpty. Operand 130358 states and 286681 transitions. [2021-07-09 17:49:22,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:49:22,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:22,303 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:22,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-09 17:49:22,504 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:22,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:22,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1206574545, now seen corresponding path program 95 times [2021-07-09 17:49:22,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:22,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735335725] [2021-07-09 17:49:22,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 85 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:22,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:22,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735335725] [2021-07-09 17:49:22,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735335725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:22,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037361326] [2021-07-09 17:49:22,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:22,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:49:22,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:22,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:49:22,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 85 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:22,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037361326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:22,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:22,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:49:22,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572081380] [2021-07-09 17:49:22,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:49:22,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:22,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:49:22,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:49:22,681 INFO L87 Difference]: Start difference. First operand 130358 states and 286681 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:23,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:23,605 INFO L93 Difference]: Finished difference Result 133389 states and 291682 transitions. [2021-07-09 17:49:23,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:49:23,606 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:49:23,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:23,890 INFO L225 Difference]: With dead ends: 133389 [2021-07-09 17:49:23,890 INFO L226 Difference]: Without dead ends: 133389 [2021-07-09 17:49:23,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:49:24,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133389 states. [2021-07-09 17:49:26,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133389 to 125674. [2021-07-09 17:49:26,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125674 states, 125673 states have (on average 2.193892085014283) internal successors, (275713), 125673 states have internal predecessors, (275713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125674 states to 125674 states and 275713 transitions. [2021-07-09 17:49:26,567 INFO L78 Accepts]: Start accepts. Automaton has 125674 states and 275713 transitions. Word has length 76 [2021-07-09 17:49:26,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:26,567 INFO L482 AbstractCegarLoop]: Abstraction has 125674 states and 275713 transitions. [2021-07-09 17:49:26,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:26,567 INFO L276 IsEmpty]: Start isEmpty. Operand 125674 states and 275713 transitions. [2021-07-09 17:49:27,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:49:27,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:27,107 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:27,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:27,308 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:27,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:27,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1482151973, now seen corresponding path program 96 times [2021-07-09 17:49:27,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:27,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396524294] [2021-07-09 17:49:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:27,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:27,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396524294] [2021-07-09 17:49:27,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396524294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:27,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135378760] [2021-07-09 17:49:27,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:27,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:49:27,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:27,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:49:27,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:27,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135378760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:27,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:27,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:49:27,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922836212] [2021-07-09 17:49:27,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:49:27,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:27,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:49:27,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:49:27,471 INFO L87 Difference]: Start difference. First operand 125674 states and 275713 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:28,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:28,357 INFO L93 Difference]: Finished difference Result 131872 states and 288047 transitions. [2021-07-09 17:49:28,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:49:28,362 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:49:28,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:28,668 INFO L225 Difference]: With dead ends: 131872 [2021-07-09 17:49:28,668 INFO L226 Difference]: Without dead ends: 131866 [2021-07-09 17:49:28,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:49:28,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131866 states. [2021-07-09 17:49:30,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131866 to 128726. [2021-07-09 17:49:31,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128726 states, 128725 states have (on average 2.197374247426685) internal successors, (282857), 128725 states have internal predecessors, (282857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128726 states to 128726 states and 282857 transitions. [2021-07-09 17:49:31,444 INFO L78 Accepts]: Start accepts. Automaton has 128726 states and 282857 transitions. Word has length 76 [2021-07-09 17:49:31,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:31,444 INFO L482 AbstractCegarLoop]: Abstraction has 128726 states and 282857 transitions. [2021-07-09 17:49:31,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:31,445 INFO L276 IsEmpty]: Start isEmpty. Operand 128726 states and 282857 transitions. [2021-07-09 17:49:31,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:49:31,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:31,549 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:31,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:31,750 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:31,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:31,750 INFO L82 PathProgramCache]: Analyzing trace with hash -207764433, now seen corresponding path program 97 times [2021-07-09 17:49:31,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:31,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303093110] [2021-07-09 17:49:31,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 89 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:31,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:31,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303093110] [2021-07-09 17:49:31,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303093110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:31,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983105891] [2021-07-09 17:49:31,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:31,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:49:31,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 89 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:31,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983105891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:31,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:31,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:49:31,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827054240] [2021-07-09 17:49:31,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:49:31,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:31,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:49:31,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:49:31,929 INFO L87 Difference]: Start difference. First operand 128726 states and 282857 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:32,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:32,838 INFO L93 Difference]: Finished difference Result 134932 states and 294145 transitions. [2021-07-09 17:49:32,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:49:32,838 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:49:32,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:33,140 INFO L225 Difference]: With dead ends: 134932 [2021-07-09 17:49:33,140 INFO L226 Difference]: Without dead ends: 134930 [2021-07-09 17:49:33,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:49:33,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134930 states. [2021-07-09 17:49:35,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134930 to 128702. [2021-07-09 17:49:36,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128702 states, 128701 states have (on average 2.1954841065725983) internal successors, (282561), 128701 states have internal predecessors, (282561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:36,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128702 states to 128702 states and 282561 transitions. [2021-07-09 17:49:36,341 INFO L78 Accepts]: Start accepts. Automaton has 128702 states and 282561 transitions. Word has length 76 [2021-07-09 17:49:36,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:36,341 INFO L482 AbstractCegarLoop]: Abstraction has 128702 states and 282561 transitions. [2021-07-09 17:49:36,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:36,342 INFO L276 IsEmpty]: Start isEmpty. Operand 128702 states and 282561 transitions. [2021-07-09 17:49:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:49:36,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:36,856 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:37,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-07-09 17:49:37,073 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:37,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:37,073 INFO L82 PathProgramCache]: Analyzing trace with hash -787222427, now seen corresponding path program 98 times [2021-07-09 17:49:37,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:37,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509562753] [2021-07-09 17:49:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:37,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:37,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509562753] [2021-07-09 17:49:37,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509562753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:37,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643661087] [2021-07-09 17:49:37,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:37,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:37,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:37,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:49:37,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:37,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643661087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:37,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:37,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:49:37,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078994393] [2021-07-09 17:49:37,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:49:37,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:37,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:49:37,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:49:37,261 INFO L87 Difference]: Start difference. First operand 128702 states and 282561 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:38,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:38,218 INFO L93 Difference]: Finished difference Result 134144 states and 292817 transitions. [2021-07-09 17:49:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:49:38,218 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:49:38,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:38,521 INFO L225 Difference]: With dead ends: 134144 [2021-07-09 17:49:38,522 INFO L226 Difference]: Without dead ends: 134142 [2021-07-09 17:49:38,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:49:38,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134142 states. [2021-07-09 17:49:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134142 to 128026. [2021-07-09 17:49:40,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128026 states, 128025 states have (on average 2.1946260495996874) internal successors, (280967), 128025 states have internal predecessors, (280967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:41,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128026 states to 128026 states and 280967 transitions. [2021-07-09 17:49:41,297 INFO L78 Accepts]: Start accepts. Automaton has 128026 states and 280967 transitions. Word has length 76 [2021-07-09 17:49:41,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:41,300 INFO L482 AbstractCegarLoop]: Abstraction has 128026 states and 280967 transitions. [2021-07-09 17:49:41,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:41,301 INFO L276 IsEmpty]: Start isEmpty. Operand 128026 states and 280967 transitions. [2021-07-09 17:49:41,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:49:41,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:41,419 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:41,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:41,620 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:41,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:41,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1819038905, now seen corresponding path program 99 times [2021-07-09 17:49:41,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:41,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138791397] [2021-07-09 17:49:41,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:49:41,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:41,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138791397] [2021-07-09 17:49:41,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138791397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:41,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631847763] [2021-07-09 17:49:41,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:41,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:49:41,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:41,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:49:41,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:49:41,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631847763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:41,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:41,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:49:41,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26533901] [2021-07-09 17:49:41,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:49:41,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:41,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:49:41,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:49:41,800 INFO L87 Difference]: Start difference. First operand 128026 states and 280967 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:42,708 INFO L93 Difference]: Finished difference Result 134843 states and 294803 transitions. [2021-07-09 17:49:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:49:42,709 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:49:42,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:43,009 INFO L225 Difference]: With dead ends: 134843 [2021-07-09 17:49:43,009 INFO L226 Difference]: Without dead ends: 134807 [2021-07-09 17:49:43,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:49:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134807 states. [2021-07-09 17:49:45,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134807 to 131862. [2021-07-09 17:49:45,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131862 states, 131861 states have (on average 2.1977916138964515) internal successors, (289803), 131861 states have internal predecessors, (289803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131862 states to 131862 states and 289803 transitions. [2021-07-09 17:49:46,174 INFO L78 Accepts]: Start accepts. Automaton has 131862 states and 289803 transitions. Word has length 76 [2021-07-09 17:49:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:46,174 INFO L482 AbstractCegarLoop]: Abstraction has 131862 states and 289803 transitions. [2021-07-09 17:49:46,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 131862 states and 289803 transitions. [2021-07-09 17:49:46,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:49:46,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:46,275 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:46,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:46,475 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:46,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:46,476 INFO L82 PathProgramCache]: Analyzing trace with hash -107715365, now seen corresponding path program 100 times [2021-07-09 17:49:46,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:46,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675696102] [2021-07-09 17:49:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:46,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:46,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675696102] [2021-07-09 17:49:46,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675696102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:46,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141135238] [2021-07-09 17:49:46,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:46,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:49:46,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:46,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:49:46,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:46,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141135238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:46,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:46,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:49:46,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531385438] [2021-07-09 17:49:46,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:49:46,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:46,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:49:46,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:49:46,664 INFO L87 Difference]: Start difference. First operand 131862 states and 289803 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:47,628 INFO L93 Difference]: Finished difference Result 138462 states and 302796 transitions. [2021-07-09 17:49:47,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:49:47,629 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:49:47,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:47,956 INFO L225 Difference]: With dead ends: 138462 [2021-07-09 17:49:47,956 INFO L226 Difference]: Without dead ends: 138426 [2021-07-09 17:49:47,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:49:48,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138426 states. [2021-07-09 17:49:50,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138426 to 131338. [2021-07-09 17:49:50,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131338 states, 131337 states have (on average 2.1961747260863276) internal successors, (288439), 131337 states have internal predecessors, (288439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:50,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131338 states to 131338 states and 288439 transitions. [2021-07-09 17:49:50,812 INFO L78 Accepts]: Start accepts. Automaton has 131338 states and 288439 transitions. Word has length 76 [2021-07-09 17:49:50,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:50,812 INFO L482 AbstractCegarLoop]: Abstraction has 131338 states and 288439 transitions. [2021-07-09 17:49:50,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 131338 states and 288439 transitions. [2021-07-09 17:49:51,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:49:51,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:51,348 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:51,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 17:49:51,572 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:51,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:51,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1166672175, now seen corresponding path program 101 times [2021-07-09 17:49:51,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:51,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536013593] [2021-07-09 17:49:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:51,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:51,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536013593] [2021-07-09 17:49:51,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536013593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:51,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081119751] [2021-07-09 17:49:51,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:51,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:49:51,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:51,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:49:51,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:51,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081119751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:51,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:51,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:49:51,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327110459] [2021-07-09 17:49:51,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:49:51,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:51,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:49:51,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:49:51,739 INFO L87 Difference]: Start difference. First operand 131338 states and 288439 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:52,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:52,284 INFO L93 Difference]: Finished difference Result 140394 states and 305750 transitions. [2021-07-09 17:49:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:49:52,284 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:49:52,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:52,900 INFO L225 Difference]: With dead ends: 140394 [2021-07-09 17:49:52,900 INFO L226 Difference]: Without dead ends: 140392 [2021-07-09 17:49:52,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:49:53,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140392 states. [2021-07-09 17:49:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140392 to 131550. [2021-07-09 17:49:55,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131550 states, 131549 states have (on average 2.1950679974762255) internal successors, (288759), 131549 states have internal predecessors, (288759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:55,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131550 states to 131550 states and 288759 transitions. [2021-07-09 17:49:55,791 INFO L78 Accepts]: Start accepts. Automaton has 131550 states and 288759 transitions. Word has length 76 [2021-07-09 17:49:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:55,791 INFO L482 AbstractCegarLoop]: Abstraction has 131550 states and 288759 transitions. [2021-07-09 17:49:55,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 131550 states and 288759 transitions. [2021-07-09 17:49:55,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:49:55,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:55,903 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:56,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-09 17:49:56,103 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:56,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:56,104 INFO L82 PathProgramCache]: Analyzing trace with hash 587214181, now seen corresponding path program 102 times [2021-07-09 17:49:56,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:56,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844744253] [2021-07-09 17:49:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:56,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:56,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844744253] [2021-07-09 17:49:56,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844744253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:56,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197796226] [2021-07-09 17:49:56,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:56,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:49:56,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:56,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:49:56,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:56,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197796226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:56,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:56,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:49:56,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984465675] [2021-07-09 17:49:56,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:49:56,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:56,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:49:56,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:49:56,702 INFO L87 Difference]: Start difference. First operand 131550 states and 288759 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:57,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:57,273 INFO L93 Difference]: Finished difference Result 148818 states and 323300 transitions. [2021-07-09 17:49:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:49:57,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:49:57,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:57,874 INFO L225 Difference]: With dead ends: 148818 [2021-07-09 17:49:57,874 INFO L226 Difference]: Without dead ends: 148800 [2021-07-09 17:49:57,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:49:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148800 states. [2021-07-09 17:50:00,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148800 to 131506. [2021-07-09 17:50:00,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131506 states, 131505 states have (on average 2.19297365119197) internal successors, (288387), 131505 states have internal predecessors, (288387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131506 states to 131506 states and 288387 transitions. [2021-07-09 17:50:00,721 INFO L78 Accepts]: Start accepts. Automaton has 131506 states and 288387 transitions. Word has length 76 [2021-07-09 17:50:00,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:00,721 INFO L482 AbstractCegarLoop]: Abstraction has 131506 states and 288387 transitions. [2021-07-09 17:50:00,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:00,721 INFO L276 IsEmpty]: Start isEmpty. Operand 131506 states and 288387 transitions. [2021-07-09 17:50:00,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:50:00,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:00,842 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:01,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-09 17:50:01,043 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:01,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:01,043 INFO L82 PathProgramCache]: Analyzing trace with hash 2040079111, now seen corresponding path program 103 times [2021-07-09 17:50:01,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:01,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64007849] [2021-07-09 17:50:01,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:01,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:01,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64007849] [2021-07-09 17:50:01,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64007849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:01,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722798804] [2021-07-09 17:50:01,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:01,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:50:01,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:01,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722798804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:01,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:01,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:50:01,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399455201] [2021-07-09 17:50:01,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:01,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:01,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:01,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:01,224 INFO L87 Difference]: Start difference. First operand 131506 states and 288387 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:02,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:02,243 INFO L93 Difference]: Finished difference Result 138086 states and 301358 transitions. [2021-07-09 17:50:02,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:50:02,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:50:02,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:02,554 INFO L225 Difference]: With dead ends: 138086 [2021-07-09 17:50:02,555 INFO L226 Difference]: Without dead ends: 138068 [2021-07-09 17:50:02,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:02,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138068 states. [2021-07-09 17:50:04,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138068 to 129102. [2021-07-09 17:50:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129102 states, 129101 states have (on average 2.1923222902998427) internal successors, (283031), 129101 states have internal predecessors, (283031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129102 states to 129102 states and 283031 transitions. [2021-07-09 17:50:05,895 INFO L78 Accepts]: Start accepts. Automaton has 129102 states and 283031 transitions. Word has length 76 [2021-07-09 17:50:05,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:05,895 INFO L482 AbstractCegarLoop]: Abstraction has 129102 states and 283031 transitions. [2021-07-09 17:50:05,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:05,896 INFO L276 IsEmpty]: Start isEmpty. Operand 129102 states and 283031 transitions. [2021-07-09 17:50:06,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:50:06,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:06,276 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:06,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:06,493 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:06,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:06,494 INFO L82 PathProgramCache]: Analyzing trace with hash 738579365, now seen corresponding path program 104 times [2021-07-09 17:50:06,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:06,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558382007] [2021-07-09 17:50:06,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:50:06,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:06,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558382007] [2021-07-09 17:50:06,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558382007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:06,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253848808] [2021-07-09 17:50:06,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:06,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:06,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:06,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:50:06,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:50:06,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253848808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:06,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:06,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:50:06,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221843932] [2021-07-09 17:50:06,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:50:06,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:06,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:50:06,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:50:06,745 INFO L87 Difference]: Start difference. First operand 129102 states and 283031 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:07,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:07,467 INFO L93 Difference]: Finished difference Result 135547 states and 296050 transitions. [2021-07-09 17:50:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:50:07,467 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:50:07,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:08,145 INFO L225 Difference]: With dead ends: 135547 [2021-07-09 17:50:08,146 INFO L226 Difference]: Without dead ends: 135511 [2021-07-09 17:50:08,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:50:08,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135511 states. [2021-07-09 17:50:10,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135511 to 132734. [2021-07-09 17:50:10,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132734 states, 132733 states have (on average 2.194322436771564) internal successors, (291259), 132733 states have internal predecessors, (291259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132734 states to 132734 states and 291259 transitions. [2021-07-09 17:50:11,027 INFO L78 Accepts]: Start accepts. Automaton has 132734 states and 291259 transitions. Word has length 76 [2021-07-09 17:50:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:11,027 INFO L482 AbstractCegarLoop]: Abstraction has 132734 states and 291259 transitions. [2021-07-09 17:50:11,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:11,027 INFO L276 IsEmpty]: Start isEmpty. Operand 132734 states and 291259 transitions. [2021-07-09 17:50:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:50:11,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:11,146 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:11,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-09 17:50:11,347 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:11,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:11,347 INFO L82 PathProgramCache]: Analyzing trace with hash -250916901, now seen corresponding path program 105 times [2021-07-09 17:50:11,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:11,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47810330] [2021-07-09 17:50:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:11,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:11,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47810330] [2021-07-09 17:50:11,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47810330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:11,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471012920] [2021-07-09 17:50:11,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:11,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:50:11,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:11,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:50:11,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:11,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471012920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:11,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:11,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:50:11,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640227320] [2021-07-09 17:50:11,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:50:11,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:11,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:50:11,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:50:11,513 INFO L87 Difference]: Start difference. First operand 132734 states and 291259 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:12,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:12,482 INFO L93 Difference]: Finished difference Result 139258 states and 304121 transitions. [2021-07-09 17:50:12,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:50:12,483 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:50:12,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:12,810 INFO L225 Difference]: With dead ends: 139258 [2021-07-09 17:50:12,810 INFO L226 Difference]: Without dead ends: 139216 [2021-07-09 17:50:12,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 462.9ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:50:12,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139216 states. [2021-07-09 17:50:15,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139216 to 132450. [2021-07-09 17:50:15,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132450 states, 132449 states have (on average 2.193168691345348) internal successors, (290483), 132449 states have internal predecessors, (290483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132450 states to 132450 states and 290483 transitions. [2021-07-09 17:50:16,156 INFO L78 Accepts]: Start accepts. Automaton has 132450 states and 290483 transitions. Word has length 76 [2021-07-09 17:50:16,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:16,157 INFO L482 AbstractCegarLoop]: Abstraction has 132450 states and 290483 transitions. [2021-07-09 17:50:16,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:16,157 INFO L276 IsEmpty]: Start isEmpty. Operand 132450 states and 290483 transitions. [2021-07-09 17:50:16,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:50:16,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:16,266 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:16,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-09 17:50:16,467 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:16,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:16,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1023470639, now seen corresponding path program 106 times [2021-07-09 17:50:16,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:16,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498882288] [2021-07-09 17:50:16,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 119 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:16,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:16,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498882288] [2021-07-09 17:50:16,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498882288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:16,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961358262] [2021-07-09 17:50:16,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:16,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:16,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:16,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:50:16,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 119 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:16,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961358262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:16,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:16,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:50:16,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374232469] [2021-07-09 17:50:16,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:50:16,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:16,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:50:16,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:50:16,648 INFO L87 Difference]: Start difference. First operand 132450 states and 290483 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:17,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:17,591 INFO L93 Difference]: Finished difference Result 142694 states and 310513 transitions. [2021-07-09 17:50:17,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:50:17,591 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:50:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:17,943 INFO L225 Difference]: With dead ends: 142694 [2021-07-09 17:50:17,943 INFO L226 Difference]: Without dead ends: 142692 [2021-07-09 17:50:17,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:50:18,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142692 states. [2021-07-09 17:50:20,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142692 to 132698. [2021-07-09 17:50:20,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132698 states, 132697 states have (on average 2.1928076746271583) internal successors, (290979), 132697 states have internal predecessors, (290979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132698 states to 132698 states and 290979 transitions. [2021-07-09 17:50:20,870 INFO L78 Accepts]: Start accepts. Automaton has 132698 states and 290979 transitions. Word has length 76 [2021-07-09 17:50:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:20,870 INFO L482 AbstractCegarLoop]: Abstraction has 132698 states and 290979 transitions. [2021-07-09 17:50:20,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:20,870 INFO L276 IsEmpty]: Start isEmpty. Operand 132698 states and 290979 transitions. [2021-07-09 17:50:20,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:50:20,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:20,985 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:21,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-09 17:50:21,185 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:21,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:21,186 INFO L82 PathProgramCache]: Analyzing trace with hash 444012645, now seen corresponding path program 107 times [2021-07-09 17:50:21,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:21,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949555822] [2021-07-09 17:50:21,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 111 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:21,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:21,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949555822] [2021-07-09 17:50:21,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949555822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:21,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962810514] [2021-07-09 17:50:21,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:21,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:50:21,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:21,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:50:21,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 111 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:21,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962810514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:21,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:21,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:50:21,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238146703] [2021-07-09 17:50:21,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:50:21,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:21,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:50:21,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:50:21,829 INFO L87 Difference]: Start difference. First operand 132698 states and 290979 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:22,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:22,490 INFO L93 Difference]: Finished difference Result 159426 states and 345883 transitions. [2021-07-09 17:50:22,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:50:22,491 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:50:22,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:23,168 INFO L225 Difference]: With dead ends: 159426 [2021-07-09 17:50:23,168 INFO L226 Difference]: Without dead ends: 159408 [2021-07-09 17:50:23,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:23,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159408 states. [2021-07-09 17:50:25,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159408 to 133538. [2021-07-09 17:50:25,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133538 states, 133537 states have (on average 2.1909957539857867) internal successors, (292579), 133537 states have internal predecessors, (292579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133538 states to 133538 states and 292579 transitions. [2021-07-09 17:50:26,235 INFO L78 Accepts]: Start accepts. Automaton has 133538 states and 292579 transitions. Word has length 76 [2021-07-09 17:50:26,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:26,235 INFO L482 AbstractCegarLoop]: Abstraction has 133538 states and 292579 transitions. [2021-07-09 17:50:26,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:26,236 INFO L276 IsEmpty]: Start isEmpty. Operand 133538 states and 292579 transitions. [2021-07-09 17:50:26,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:50:26,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:26,351 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:26,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:26,551 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:26,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:26,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1896877575, now seen corresponding path program 108 times [2021-07-09 17:50:26,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:26,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779395244] [2021-07-09 17:50:26,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:26,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:26,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779395244] [2021-07-09 17:50:26,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779395244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:26,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160209284] [2021-07-09 17:50:26,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:26,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:50:26,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:26,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:50:26,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:26,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160209284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:26,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:26,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:50:26,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814936636] [2021-07-09 17:50:26,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:26,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:26,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:26,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:26,728 INFO L87 Difference]: Start difference. First operand 133538 states and 292579 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:27,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:27,805 INFO L93 Difference]: Finished difference Result 154174 states and 334665 transitions. [2021-07-09 17:50:27,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:50:27,806 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:50:27,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:28,488 INFO L225 Difference]: With dead ends: 154174 [2021-07-09 17:50:28,488 INFO L226 Difference]: Without dead ends: 154136 [2021-07-09 17:50:28,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:28,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154136 states. [2021-07-09 17:50:31,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154136 to 133478. [2021-07-09 17:50:31,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133478 states, 133477 states have (on average 2.1892535792683385) internal successors, (292215), 133477 states have internal predecessors, (292215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:31,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133478 states to 133478 states and 292215 transitions. [2021-07-09 17:50:31,618 INFO L78 Accepts]: Start accepts. Automaton has 133478 states and 292215 transitions. Word has length 76 [2021-07-09 17:50:31,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:31,618 INFO L482 AbstractCegarLoop]: Abstraction has 133478 states and 292215 transitions. [2021-07-09 17:50:31,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:31,618 INFO L276 IsEmpty]: Start isEmpty. Operand 133478 states and 292215 transitions. [2021-07-09 17:50:31,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:50:31,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:31,738 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:31,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:31,938 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:31,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:31,938 INFO L82 PathProgramCache]: Analyzing trace with hash 35406309, now seen corresponding path program 109 times [2021-07-09 17:50:31,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:31,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956595418] [2021-07-09 17:50:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:32,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:32,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956595418] [2021-07-09 17:50:32,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956595418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:32,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310727764] [2021-07-09 17:50:32,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:32,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:50:32,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:32,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310727764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:32,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:32,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:50:32,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150588304] [2021-07-09 17:50:32,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:50:32,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:32,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:50:32,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:50:32,142 INFO L87 Difference]: Start difference. First operand 133478 states and 292215 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:33,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:33,154 INFO L93 Difference]: Finished difference Result 139982 states and 305517 transitions. [2021-07-09 17:50:33,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:50:33,155 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:50:33,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:33,481 INFO L225 Difference]: With dead ends: 139982 [2021-07-09 17:50:33,482 INFO L226 Difference]: Without dead ends: 139944 [2021-07-09 17:50:33,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:33,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139944 states. [2021-07-09 17:50:35,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139944 to 129634. [2021-07-09 17:50:36,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129634 states, 129633 states have (on average 2.1887250931475783) internal successors, (283731), 129633 states have internal predecessors, (283731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:36,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129634 states to 129634 states and 283731 transitions. [2021-07-09 17:50:36,720 INFO L78 Accepts]: Start accepts. Automaton has 129634 states and 283731 transitions. Word has length 76 [2021-07-09 17:50:36,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:36,720 INFO L482 AbstractCegarLoop]: Abstraction has 129634 states and 283731 transitions. [2021-07-09 17:50:36,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand 129634 states and 283731 transitions. [2021-07-09 17:50:37,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:50:37,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:37,066 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:37,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:37,281 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:37,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1667424839, now seen corresponding path program 110 times [2021-07-09 17:50:37,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:37,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717233198] [2021-07-09 17:50:37,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 109 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:50:37,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:37,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717233198] [2021-07-09 17:50:37,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717233198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:37,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186485702] [2021-07-09 17:50:37,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:37,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:37,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:37,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:50:37,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 109 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:50:37,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186485702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:37,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:37,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:50:37,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151541472] [2021-07-09 17:50:37,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:50:37,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:37,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:50:37,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:50:37,503 INFO L87 Difference]: Start difference. First operand 129634 states and 283731 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:38,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:38,202 INFO L93 Difference]: Finished difference Result 135321 states and 295193 transitions. [2021-07-09 17:50:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:50:38,202 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:50:38,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:38,837 INFO L225 Difference]: With dead ends: 135321 [2021-07-09 17:50:38,838 INFO L226 Difference]: Without dead ends: 135249 [2021-07-09 17:50:38,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:50:38,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135249 states. [2021-07-09 17:50:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135249 to 123270. [2021-07-09 17:50:41,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123270 states, 123269 states have (on average 2.185910488443972) internal successors, (269455), 123269 states have internal predecessors, (269455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:41,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123270 states to 123270 states and 269455 transitions. [2021-07-09 17:50:41,353 INFO L78 Accepts]: Start accepts. Automaton has 123270 states and 269455 transitions. Word has length 76 [2021-07-09 17:50:41,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:41,353 INFO L482 AbstractCegarLoop]: Abstraction has 123270 states and 269455 transitions. [2021-07-09 17:50:41,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:41,353 INFO L276 IsEmpty]: Start isEmpty. Operand 123270 states and 269455 transitions. [2021-07-09 17:50:41,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:50:41,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:41,906 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:42,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-09 17:50:42,106 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:42,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:42,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1250905307, now seen corresponding path program 111 times [2021-07-09 17:50:42,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:42,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709787244] [2021-07-09 17:50:42,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 135 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:42,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:42,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709787244] [2021-07-09 17:50:42,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709787244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:42,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111244637] [2021-07-09 17:50:42,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:42,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 17:50:42,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:42,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:50:42,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 135 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:42,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111244637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:42,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:42,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:50:42,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678072815] [2021-07-09 17:50:42,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:50:42,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:42,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:50:42,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:50:42,294 INFO L87 Difference]: Start difference. First operand 123270 states and 269455 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:43,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:43,220 INFO L93 Difference]: Finished difference Result 128955 states and 280766 transitions. [2021-07-09 17:50:43,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:50:43,220 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:50:43,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:43,523 INFO L225 Difference]: With dead ends: 128955 [2021-07-09 17:50:43,523 INFO L226 Difference]: Without dead ends: 128913 [2021-07-09 17:50:43,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:50:43,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128913 states. [2021-07-09 17:50:45,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128913 to 122990. [2021-07-09 17:50:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122990 states, 122989 states have (on average 2.185553179552643) internal successors, (268799), 122989 states have internal predecessors, (268799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122990 states to 122990 states and 268799 transitions. [2021-07-09 17:50:46,207 INFO L78 Accepts]: Start accepts. Automaton has 122990 states and 268799 transitions. Word has length 76 [2021-07-09 17:50:46,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:46,207 INFO L482 AbstractCegarLoop]: Abstraction has 122990 states and 268799 transitions. [2021-07-09 17:50:46,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:46,207 INFO L276 IsEmpty]: Start isEmpty. Operand 122990 states and 268799 transitions. [2021-07-09 17:50:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:50:46,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:46,331 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:46,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-09 17:50:46,545 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:46,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:46,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1769674449, now seen corresponding path program 112 times [2021-07-09 17:50:46,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:46,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703729489] [2021-07-09 17:50:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 120 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:46,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:46,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703729489] [2021-07-09 17:50:46,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703729489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:46,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017791970] [2021-07-09 17:50:46,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:46,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:46,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:46,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:50:46,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 120 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:46,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017791970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:46,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:46,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:50:46,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576676718] [2021-07-09 17:50:46,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:50:46,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:46,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:50:46,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:50:46,732 INFO L87 Difference]: Start difference. First operand 122990 states and 268799 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:47,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:47,659 INFO L93 Difference]: Finished difference Result 130997 states and 284211 transitions. [2021-07-09 17:50:47,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:50:47,660 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:50:47,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:47,980 INFO L225 Difference]: With dead ends: 130997 [2021-07-09 17:50:47,980 INFO L226 Difference]: Without dead ends: 130997 [2021-07-09 17:50:47,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:50:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130997 states. [2021-07-09 17:50:49,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130997 to 123134. [2021-07-09 17:50:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123134 states, 123133 states have (on average 2.1853036960035084) internal successors, (269083), 123133 states have internal predecessors, (269083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:50,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123134 states to 123134 states and 269083 transitions. [2021-07-09 17:50:50,768 INFO L78 Accepts]: Start accepts. Automaton has 123134 states and 269083 transitions. Word has length 76 [2021-07-09 17:50:50,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:50,768 INFO L482 AbstractCegarLoop]: Abstraction has 123134 states and 269083 transitions. [2021-07-09 17:50:50,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:50,768 INFO L276 IsEmpty]: Start isEmpty. Operand 123134 states and 269083 transitions. [2021-07-09 17:50:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:50:50,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:50,897 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:51,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 17:50:51,109 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:51,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:51,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1945834853, now seen corresponding path program 113 times [2021-07-09 17:50:51,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:51,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532693649] [2021-07-09 17:50:51,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:51,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:51,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532693649] [2021-07-09 17:50:51,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532693649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:51,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349226142] [2021-07-09 17:50:51,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:51,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:50:51,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:51,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:50:51,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:51,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349226142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:51,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:51,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:50:51,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610987697] [2021-07-09 17:50:51,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:50:51,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:51,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:50:51,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:50:51,300 INFO L87 Difference]: Start difference. First operand 123134 states and 269083 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:52,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:52,276 INFO L93 Difference]: Finished difference Result 145897 states and 315475 transitions. [2021-07-09 17:50:52,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:50:52,276 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:50:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:52,638 INFO L225 Difference]: With dead ends: 145897 [2021-07-09 17:50:52,638 INFO L226 Difference]: Without dead ends: 145897 [2021-07-09 17:50:52,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:50:52,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145897 states. [2021-07-09 17:50:54,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145897 to 123934. [2021-07-09 17:50:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123934 states, 123933 states have (on average 2.184720776548619) internal successors, (270759), 123933 states have internal predecessors, (270759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123934 states to 123934 states and 270759 transitions. [2021-07-09 17:50:55,467 INFO L78 Accepts]: Start accepts. Automaton has 123934 states and 270759 transitions. Word has length 76 [2021-07-09 17:50:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:55,467 INFO L482 AbstractCegarLoop]: Abstraction has 123934 states and 270759 transitions. [2021-07-09 17:50:55,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 123934 states and 270759 transitions. [2021-07-09 17:50:55,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:50:55,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:55,573 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:55,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 17:50:55,774 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:55,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:55,774 INFO L82 PathProgramCache]: Analyzing trace with hash -896267513, now seen corresponding path program 114 times [2021-07-09 17:50:55,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:55,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678037500] [2021-07-09 17:50:55,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:55,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:55,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678037500] [2021-07-09 17:50:55,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678037500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:55,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192035923] [2021-07-09 17:50:55,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:55,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 17:50:55,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:55,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:50:55,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:55,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192035923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:55,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:55,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:50:55,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717748741] [2021-07-09 17:50:55,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:50:55,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:55,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:50:55,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:50:55,960 INFO L87 Difference]: Start difference. First operand 123934 states and 270759 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:56,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:56,925 INFO L93 Difference]: Finished difference Result 146309 states and 316555 transitions. [2021-07-09 17:50:56,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:50:56,925 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:50:56,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:57,260 INFO L225 Difference]: With dead ends: 146309 [2021-07-09 17:50:57,261 INFO L226 Difference]: Without dead ends: 146309 [2021-07-09 17:50:57,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:50:57,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146309 states. [2021-07-09 17:50:59,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146309 to 124414. [2021-07-09 17:50:59,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124414 states, 124413 states have (on average 2.1839438000852) internal successors, (271711), 124413 states have internal predecessors, (271711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124414 states to 124414 states and 271711 transitions. [2021-07-09 17:51:00,070 INFO L78 Accepts]: Start accepts. Automaton has 124414 states and 271711 transitions. Word has length 76 [2021-07-09 17:51:00,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:00,070 INFO L482 AbstractCegarLoop]: Abstraction has 124414 states and 271711 transitions. [2021-07-09 17:51:00,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 124414 states and 271711 transitions. [2021-07-09 17:51:00,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:51:00,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:00,181 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:00,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-09 17:51:00,385 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:00,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:00,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1537228517, now seen corresponding path program 115 times [2021-07-09 17:51:00,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:00,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412658865] [2021-07-09 17:51:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:00,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:00,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412658865] [2021-07-09 17:51:00,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412658865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:00,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506306533] [2021-07-09 17:51:00,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:00,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:51:00,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:00,964 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-09 17:51:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:01,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506306533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:01,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:01,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:51:01,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517606637] [2021-07-09 17:51:01,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:51:01,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:01,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:51:01,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:51:01,009 INFO L87 Difference]: Start difference. First operand 124414 states and 271711 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:01,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:01,660 INFO L93 Difference]: Finished difference Result 138029 states and 299093 transitions. [2021-07-09 17:51:01,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:51:01,660 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:51:01,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:02,290 INFO L225 Difference]: With dead ends: 138029 [2021-07-09 17:51:02,290 INFO L226 Difference]: Without dead ends: 138029 [2021-07-09 17:51:02,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:51:02,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138029 states. [2021-07-09 17:51:04,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138029 to 123854. [2021-07-09 17:51:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123854 states, 123853 states have (on average 2.1827085335034275) internal successors, (270335), 123853 states have internal predecessors, (270335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123854 states to 123854 states and 270335 transitions. [2021-07-09 17:51:04,746 INFO L78 Accepts]: Start accepts. Automaton has 123854 states and 270335 transitions. Word has length 76 [2021-07-09 17:51:04,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:04,746 INFO L482 AbstractCegarLoop]: Abstraction has 123854 states and 270335 transitions. [2021-07-09 17:51:04,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 123854 states and 270335 transitions. [2021-07-09 17:51:05,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:51:05,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:05,284 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:05,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:05,486 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:05,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:05,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1812206087, now seen corresponding path program 116 times [2021-07-09 17:51:05,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:05,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235726463] [2021-07-09 17:51:05,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:05,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:05,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235726463] [2021-07-09 17:51:05,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235726463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:05,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078962216] [2021-07-09 17:51:05,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:05,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:05,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:05,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:51:05,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:05,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078962216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:05,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:05,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:51:05,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795905362] [2021-07-09 17:51:05,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:51:05,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:05,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:51:05,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:51:05,694 INFO L87 Difference]: Start difference. First operand 123854 states and 270335 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:06,252 INFO L93 Difference]: Finished difference Result 128519 states and 279224 transitions. [2021-07-09 17:51:06,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:51:06,253 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:51:06,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:07,011 INFO L225 Difference]: With dead ends: 128519 [2021-07-09 17:51:07,012 INFO L226 Difference]: Without dead ends: 128519 [2021-07-09 17:51:07,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:51:07,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128519 states. [2021-07-09 17:51:09,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128519 to 117206. [2021-07-09 17:51:09,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117206 states, 117205 states have (on average 2.179659570837422) internal successors, (255467), 117205 states have internal predecessors, (255467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:09,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117206 states to 117206 states and 255467 transitions. [2021-07-09 17:51:09,455 INFO L78 Accepts]: Start accepts. Automaton has 117206 states and 255467 transitions. Word has length 76 [2021-07-09 17:51:09,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:09,456 INFO L482 AbstractCegarLoop]: Abstraction has 117206 states and 255467 transitions. [2021-07-09 17:51:09,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:09,456 INFO L276 IsEmpty]: Start isEmpty. Operand 117206 states and 255467 transitions. [2021-07-09 17:51:09,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:51:09,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:09,560 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:09,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-09 17:51:09,761 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:09,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:09,761 INFO L82 PathProgramCache]: Analyzing trace with hash -594123685, now seen corresponding path program 117 times [2021-07-09 17:51:09,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:09,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303024283] [2021-07-09 17:51:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-09 17:51:09,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:09,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303024283] [2021-07-09 17:51:09,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303024283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:09,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190984621] [2021-07-09 17:51:09,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:09,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:51:09,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:09,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:51:09,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-09 17:51:09,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190984621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:09,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:09,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:51:09,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097258448] [2021-07-09 17:51:09,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:51:09,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:09,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:51:09,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:51:09,944 INFO L87 Difference]: Start difference. First operand 117206 states and 255467 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 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) [2021-07-09 17:51:10,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:10,884 INFO L93 Difference]: Finished difference Result 128191 states and 279004 transitions. [2021-07-09 17:51:10,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:51:10,885 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 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 76 [2021-07-09 17:51:10,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:11,154 INFO L225 Difference]: With dead ends: 128191 [2021-07-09 17:51:11,154 INFO L226 Difference]: Without dead ends: 128065 [2021-07-09 17:51:11,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 487.6ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:11,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128065 states. [2021-07-09 17:51:13,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128065 to 122126. [2021-07-09 17:51:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.1861780962128967) internal successors, (266987), 122125 states have internal predecessors, (266987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:13,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266987 transitions. [2021-07-09 17:51:13,880 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266987 transitions. Word has length 76 [2021-07-09 17:51:13,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:13,880 INFO L482 AbstractCegarLoop]: Abstraction has 122126 states and 266987 transitions. [2021-07-09 17:51:13,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 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) [2021-07-09 17:51:13,880 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266987 transitions. [2021-07-09 17:51:13,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:51:13,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:13,984 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:14,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 17:51:14,185 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:14,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:14,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1359967973, now seen corresponding path program 118 times [2021-07-09 17:51:14,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:14,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835522409] [2021-07-09 17:51:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 95 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:51:14,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:14,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835522409] [2021-07-09 17:51:14,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835522409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:14,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540387395] [2021-07-09 17:51:14,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:14,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:14,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:14,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:51:14,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 95 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:51:14,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540387395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:14,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:14,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:51:14,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330745824] [2021-07-09 17:51:14,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:51:14,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:14,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:51:14,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:51:14,365 INFO L87 Difference]: Start difference. First operand 122126 states and 266987 transitions. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:15,301 INFO L93 Difference]: Finished difference Result 124343 states and 270490 transitions. [2021-07-09 17:51:15,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:51:15,301 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:51:15,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:15,562 INFO L225 Difference]: With dead ends: 124343 [2021-07-09 17:51:15,562 INFO L226 Difference]: Without dead ends: 124247 [2021-07-09 17:51:15,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:51:15,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124247 states. [2021-07-09 17:51:17,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124247 to 122126. [2021-07-09 17:51:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.185523029682702) internal successors, (266907), 122125 states have internal predecessors, (266907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:18,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266907 transitions. [2021-07-09 17:51:18,252 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266907 transitions. Word has length 76 [2021-07-09 17:51:18,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:18,252 INFO L482 AbstractCegarLoop]: Abstraction has 122126 states and 266907 transitions. [2021-07-09 17:51:18,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:18,252 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266907 transitions. [2021-07-09 17:51:18,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:51:18,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:18,356 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:18,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:18,561 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:18,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:18,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1890462181, now seen corresponding path program 119 times [2021-07-09 17:51:18,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:18,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733460620] [2021-07-09 17:51:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 80 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-09 17:51:18,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:18,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733460620] [2021-07-09 17:51:18,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733460620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:18,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828549159] [2021-07-09 17:51:18,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:19,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:51:19,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:19,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:51:19,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 80 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-09 17:51:19,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828549159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:19,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:19,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:51:19,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117738640] [2021-07-09 17:51:19,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:51:19,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:19,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:51:19,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:51:19,178 INFO L87 Difference]: Start difference. First operand 122126 states and 266907 transitions. Second operand has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 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) [2021-07-09 17:51:19,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:19,692 INFO L93 Difference]: Finished difference Result 123893 states and 269670 transitions. [2021-07-09 17:51:19,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:51:19,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 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 76 [2021-07-09 17:51:19,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:20,265 INFO L225 Difference]: With dead ends: 123893 [2021-07-09 17:51:20,265 INFO L226 Difference]: Without dead ends: 123827 [2021-07-09 17:51:20,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:51:20,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123827 states. [2021-07-09 17:51:22,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123827 to 122126. [2021-07-09 17:51:22,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.185195496417605) internal successors, (266867), 122125 states have internal predecessors, (266867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:22,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266867 transitions. [2021-07-09 17:51:22,621 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266867 transitions. Word has length 76 [2021-07-09 17:51:22,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:22,621 INFO L482 AbstractCegarLoop]: Abstraction has 122126 states and 266867 transitions. [2021-07-09 17:51:22,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 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) [2021-07-09 17:51:22,621 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266867 transitions. [2021-07-09 17:51:22,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:51:22,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:22,723 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:22,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:22,923 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:22,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:22,923 INFO L82 PathProgramCache]: Analyzing trace with hash -46355163, now seen corresponding path program 120 times [2021-07-09 17:51:22,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:22,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624297871] [2021-07-09 17:51:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:51:22,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:22,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624297871] [2021-07-09 17:51:22,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624297871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:22,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559435147] [2021-07-09 17:51:22,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:22,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 17:51:22,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:22,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:51:22,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:23,448 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 17:51:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-07-09 17:51:23,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559435147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:23,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:23,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-07-09 17:51:23,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977423371] [2021-07-09 17:51:23,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:51:23,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:23,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:51:23,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:51:23,588 INFO L87 Difference]: Start difference. First operand 122126 states and 266867 transitions. Second operand has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:25,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:25,449 INFO L93 Difference]: Finished difference Result 203383 states and 440408 transitions. [2021-07-09 17:51:25,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 17:51:25,450 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:51:25,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:26,195 INFO L225 Difference]: With dead ends: 203383 [2021-07-09 17:51:26,195 INFO L226 Difference]: Without dead ends: 203092 [2021-07-09 17:51:26,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 712.8ms TimeCoverageRelationStatistics Valid=782, Invalid=6190, Unknown=0, NotChecked=0, Total=6972 [2021-07-09 17:51:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203092 states. [2021-07-09 17:51:28,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203092 to 153026. [2021-07-09 17:51:29,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153026 states, 153025 states have (on average 2.1853487992158143) internal successors, (334413), 153025 states have internal predecessors, (334413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153026 states to 153026 states and 334413 transitions. [2021-07-09 17:51:29,869 INFO L78 Accepts]: Start accepts. Automaton has 153026 states and 334413 transitions. Word has length 76 [2021-07-09 17:51:29,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:29,869 INFO L482 AbstractCegarLoop]: Abstraction has 153026 states and 334413 transitions. [2021-07-09 17:51:29,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:29,869 INFO L276 IsEmpty]: Start isEmpty. Operand 153026 states and 334413 transitions. [2021-07-09 17:51:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-07-09 17:51:29,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:29,984 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:30,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:30,193 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:30,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:30,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1549994118, now seen corresponding path program 121 times [2021-07-09 17:51:30,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:30,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285375547] [2021-07-09 17:51:30,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 144 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:30,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:30,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285375547] [2021-07-09 17:51:30,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285375547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:30,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57799880] [2021-07-09 17:51:30,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:30,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:51:30,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 114 proven. 41 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-07-09 17:51:30,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57799880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:30,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:30,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 15 [2021-07-09 17:51:30,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286301415] [2021-07-09 17:51:30,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:51:30,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:30,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:51:30,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:51:30,413 INFO L87 Difference]: Start difference. First operand 153026 states and 334413 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:31,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:31,398 INFO L93 Difference]: Finished difference Result 163078 states and 354025 transitions. [2021-07-09 17:51:31,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:51:31,399 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-07-09 17:51:31,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:31,773 INFO L225 Difference]: With dead ends: 163078 [2021-07-09 17:51:31,773 INFO L226 Difference]: Without dead ends: 162830 [2021-07-09 17:51:31,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:51:31,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162830 states. [2021-07-09 17:51:34,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162830 to 153130. [2021-07-09 17:51:34,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153130 states, 153129 states have (on average 2.1844392636273993) internal successors, (334501), 153129 states have internal predecessors, (334501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:35,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153130 states to 153130 states and 334501 transitions. [2021-07-09 17:51:35,253 INFO L78 Accepts]: Start accepts. Automaton has 153130 states and 334501 transitions. Word has length 76 [2021-07-09 17:51:35,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:35,253 INFO L482 AbstractCegarLoop]: Abstraction has 153130 states and 334501 transitions. [2021-07-09 17:51:35,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:35,254 INFO L276 IsEmpty]: Start isEmpty. Operand 153130 states and 334501 transitions. [2021-07-09 17:51:35,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-07-09 17:51:35,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:35,432 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:35,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-09 17:51:35,633 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:35,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:35,633 INFO L82 PathProgramCache]: Analyzing trace with hash -794330746, now seen corresponding path program 122 times [2021-07-09 17:51:35,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:35,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133827538] [2021-07-09 17:51:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 132 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:35,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:35,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133827538] [2021-07-09 17:51:35,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133827538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:35,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508200686] [2021-07-09 17:51:35,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:35,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:35,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:35,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:51:35,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 132 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:35,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508200686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:35,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:35,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-07-09 17:51:35,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102110792] [2021-07-09 17:51:35,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:51:35,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:35,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:51:35,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:51:35,891 INFO L87 Difference]: Start difference. First operand 153130 states and 334501 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:37,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:37,078 INFO L93 Difference]: Finished difference Result 169486 states and 368744 transitions. [2021-07-09 17:51:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:51:37,078 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-07-09 17:51:37,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:37,733 INFO L225 Difference]: With dead ends: 169486 [2021-07-09 17:51:37,733 INFO L226 Difference]: Without dead ends: 169486 [2021-07-09 17:51:37,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:51:37,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169486 states. [2021-07-09 17:51:40,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169486 to 157008. [2021-07-09 17:51:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157008 states, 157007 states have (on average 2.18660951422548) internal successors, (343313), 157007 states have internal predecessors, (343313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157008 states to 157008 states and 343313 transitions. [2021-07-09 17:51:41,663 INFO L78 Accepts]: Start accepts. Automaton has 157008 states and 343313 transitions. Word has length 86 [2021-07-09 17:51:41,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:41,664 INFO L482 AbstractCegarLoop]: Abstraction has 157008 states and 343313 transitions. [2021-07-09 17:51:41,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 157008 states and 343313 transitions. [2021-07-09 17:51:41,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-07-09 17:51:41,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:41,881 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:42,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 17:51:42,082 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:42,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:42,083 INFO L82 PathProgramCache]: Analyzing trace with hash -820162426, now seen corresponding path program 123 times [2021-07-09 17:51:42,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:42,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118192809] [2021-07-09 17:51:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 161 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:42,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:42,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118192809] [2021-07-09 17:51:42,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118192809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:42,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661552273] [2021-07-09 17:51:42,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:42,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:51:42,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:42,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:51:42,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 161 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:42,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661552273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:42,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:42,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:51:42,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282646881] [2021-07-09 17:51:42,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:51:42,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:42,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:51:42,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:51:42,285 INFO L87 Difference]: Start difference. First operand 157008 states and 343313 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:43,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:43,182 INFO L93 Difference]: Finished difference Result 159720 states and 347802 transitions. [2021-07-09 17:51:43,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:51:43,183 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-07-09 17:51:43,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:43,561 INFO L225 Difference]: With dead ends: 159720 [2021-07-09 17:51:43,561 INFO L226 Difference]: Without dead ends: 159716 [2021-07-09 17:51:43,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:51:43,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159716 states. [2021-07-09 17:51:46,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159716 to 154858. [2021-07-09 17:51:46,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154858 states, 154857 states have (on average 2.1844734174109015) internal successors, (338281), 154857 states have internal predecessors, (338281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154858 states to 154858 states and 338281 transitions. [2021-07-09 17:51:47,020 INFO L78 Accepts]: Start accepts. Automaton has 154858 states and 338281 transitions. Word has length 86 [2021-07-09 17:51:47,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:47,020 INFO L482 AbstractCegarLoop]: Abstraction has 154858 states and 338281 transitions. [2021-07-09 17:51:47,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:47,021 INFO L276 IsEmpty]: Start isEmpty. Operand 154858 states and 338281 transitions. [2021-07-09 17:51:47,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-07-09 17:51:47,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:47,212 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:47,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:47,413 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:47,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:47,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1936875116, now seen corresponding path program 124 times [2021-07-09 17:51:47,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:47,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894829144] [2021-07-09 17:51:47,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 154 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:47,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:47,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894829144] [2021-07-09 17:51:47,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894829144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:47,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919971644] [2021-07-09 17:51:47,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:47,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:47,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:47,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:51:47,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 150 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:51:47,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919971644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:47,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:47,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2021-07-09 17:51:47,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40008785] [2021-07-09 17:51:47,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:51:47,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:47,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:51:47,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:51:47,671 INFO L87 Difference]: Start difference. First operand 154858 states and 338281 transitions. Second operand has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:49,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:49,182 INFO L93 Difference]: Finished difference Result 164918 states and 359351 transitions. [2021-07-09 17:51:49,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:51:49,183 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-07-09 17:51:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:49,544 INFO L225 Difference]: With dead ends: 164918 [2021-07-09 17:51:49,544 INFO L226 Difference]: Without dead ends: 164914 [2021-07-09 17:51:49,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 225.9ms TimeCoverageRelationStatistics Valid=311, Invalid=745, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:51:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164914 states. [2021-07-09 17:51:52,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164914 to 155138. [2021-07-09 17:51:52,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155138 states, 155137 states have (on average 2.1851718158788684) internal successors, (339001), 155137 states have internal predecessors, (339001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:52,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155138 states to 155138 states and 339001 transitions. [2021-07-09 17:51:52,640 INFO L78 Accepts]: Start accepts. Automaton has 155138 states and 339001 transitions. Word has length 86 [2021-07-09 17:51:52,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:52,641 INFO L482 AbstractCegarLoop]: Abstraction has 155138 states and 339001 transitions. [2021-07-09 17:51:52,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:52,641 INFO L276 IsEmpty]: Start isEmpty. Operand 155138 states and 339001 transitions. [2021-07-09 17:51:53,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-07-09 17:51:53,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:53,276 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:53,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 17:51:53,481 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:53,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:53,481 INFO L82 PathProgramCache]: Analyzing trace with hash 537593542, now seen corresponding path program 125 times [2021-07-09 17:51:53,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:53,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039743073] [2021-07-09 17:51:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:53,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:53,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039743073] [2021-07-09 17:51:53,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039743073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:53,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495444820] [2021-07-09 17:51:53,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:53,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:51:53,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:53,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:51:53,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 146 proven. 87 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-09 17:51:53,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495444820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:53,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:53,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2021-07-09 17:51:53,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156809009] [2021-07-09 17:51:53,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:51:53,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:53,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:51:53,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:51:53,766 INFO L87 Difference]: Start difference. First operand 155138 states and 339001 transitions. Second operand has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:54,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:54,934 INFO L93 Difference]: Finished difference Result 162401 states and 354857 transitions. [2021-07-09 17:51:54,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:51:54,934 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-07-09 17:51:54,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:55,305 INFO L225 Difference]: With dead ends: 162401 [2021-07-09 17:51:55,305 INFO L226 Difference]: Without dead ends: 162246 [2021-07-09 17:51:55,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 324.9ms TimeCoverageRelationStatistics Valid=458, Invalid=1102, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:51:55,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162246 states. [2021-07-09 17:51:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162246 to 154498. [2021-07-09 17:51:58,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154498 states, 154497 states have (on average 2.185110390493019) internal successors, (337593), 154497 states have internal predecessors, (337593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:58,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154498 states to 154498 states and 337593 transitions. [2021-07-09 17:51:58,738 INFO L78 Accepts]: Start accepts. Automaton has 154498 states and 337593 transitions. Word has length 86 [2021-07-09 17:51:58,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:58,739 INFO L482 AbstractCegarLoop]: Abstraction has 154498 states and 337593 transitions. [2021-07-09 17:51:58,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:58,739 INFO L276 IsEmpty]: Start isEmpty. Operand 154498 states and 337593 transitions. [2021-07-09 17:51:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-07-09 17:51:58,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:58,984 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:59,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-09 17:51:59,184 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:59,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:59,184 INFO L82 PathProgramCache]: Analyzing trace with hash -96272570, now seen corresponding path program 126 times [2021-07-09 17:51:59,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:59,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127338043] [2021-07-09 17:51:59,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 75 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 17:51:59,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:59,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127338043] [2021-07-09 17:51:59,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127338043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:59,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965111561] [2021-07-09 17:51:59,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:59,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:51:59,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:59,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:51:59,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 75 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 17:51:59,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965111561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:59,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:59,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:51:59,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772751223] [2021-07-09 17:51:59,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:51:59,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:59,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:51:59,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:51:59,371 INFO L87 Difference]: Start difference. First operand 154498 states and 337593 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:00,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:00,481 INFO L93 Difference]: Finished difference Result 187447 states and 406719 transitions. [2021-07-09 17:52:00,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:52:00,481 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-07-09 17:52:00,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:01,248 INFO L225 Difference]: With dead ends: 187447 [2021-07-09 17:52:01,248 INFO L226 Difference]: Without dead ends: 187447 [2021-07-09 17:52:01,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:52:01,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187447 states. [2021-07-09 17:52:03,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187447 to 159330. [2021-07-09 17:52:04,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159330 states, 159329 states have (on average 2.1893126800519678) internal successors, (348821), 159329 states have internal predecessors, (348821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159330 states to 159330 states and 348821 transitions. [2021-07-09 17:52:04,939 INFO L78 Accepts]: Start accepts. Automaton has 159330 states and 348821 transitions. Word has length 86 [2021-07-09 17:52:04,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:04,939 INFO L482 AbstractCegarLoop]: Abstraction has 159330 states and 348821 transitions. [2021-07-09 17:52:04,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 159330 states and 348821 transitions. [2021-07-09 17:52:05,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-07-09 17:52:05,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:05,112 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:05,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-09 17:52:05,313 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:05,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:05,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1409882758, now seen corresponding path program 127 times [2021-07-09 17:52:05,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:05,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897520120] [2021-07-09 17:52:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 110 proven. 120 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 17:52:05,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:05,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897520120] [2021-07-09 17:52:05,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897520120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:05,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919955622] [2021-07-09 17:52:05,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:05,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:52:05,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 108 proven. 126 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:52:05,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919955622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:05,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:05,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:52:05,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222661336] [2021-07-09 17:52:05,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:52:05,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:05,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:52:05,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:52:05,506 INFO L87 Difference]: Start difference. First operand 159330 states and 348821 transitions. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:06,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:06,594 INFO L93 Difference]: Finished difference Result 195387 states and 423182 transitions. [2021-07-09 17:52:06,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:52:06,595 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-07-09 17:52:06,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:07,379 INFO L225 Difference]: With dead ends: 195387 [2021-07-09 17:52:07,379 INFO L226 Difference]: Without dead ends: 195323 [2021-07-09 17:52:07,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:52:07,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195323 states. [2021-07-09 17:52:10,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195323 to 159302. [2021-07-09 17:52:10,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159302 states, 159301 states have (on average 2.1885926642017313) internal successors, (348645), 159301 states have internal predecessors, (348645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:11,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159302 states to 159302 states and 348645 transitions. [2021-07-09 17:52:11,746 INFO L78 Accepts]: Start accepts. Automaton has 159302 states and 348645 transitions. Word has length 86 [2021-07-09 17:52:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:11,746 INFO L482 AbstractCegarLoop]: Abstraction has 159302 states and 348645 transitions. [2021-07-09 17:52:11,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:11,747 INFO L276 IsEmpty]: Start isEmpty. Operand 159302 states and 348645 transitions. [2021-07-09 17:52:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-07-09 17:52:11,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:11,941 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:12,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:12,142 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:12,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:12,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1043800596, now seen corresponding path program 128 times [2021-07-09 17:52:12,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:12,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696498638] [2021-07-09 17:52:12,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 101 proven. 134 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:52:12,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:12,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696498638] [2021-07-09 17:52:12,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696498638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:12,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687778064] [2021-07-09 17:52:12,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:12,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:12,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:12,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:52:12,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 131 proven. 103 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:52:12,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687778064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:12,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:12,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-09 17:52:12,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993184328] [2021-07-09 17:52:12,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:52:12,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:12,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:52:12,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:52:12,347 INFO L87 Difference]: Start difference. First operand 159302 states and 348645 transitions. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:13,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:13,367 INFO L93 Difference]: Finished difference Result 177150 states and 384101 transitions. [2021-07-09 17:52:13,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:52:13,368 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-07-09 17:52:13,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:13,778 INFO L225 Difference]: With dead ends: 177150 [2021-07-09 17:52:13,778 INFO L226 Difference]: Without dead ends: 177126 [2021-07-09 17:52:13,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:52:13,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177126 states. [2021-07-09 17:52:16,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177126 to 159386. [2021-07-09 17:52:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159386 states, 159385 states have (on average 2.1882674028296263) internal successors, (348777), 159385 states have internal predecessors, (348777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159386 states to 159386 states and 348777 transitions. [2021-07-09 17:52:17,280 INFO L78 Accepts]: Start accepts. Automaton has 159386 states and 348777 transitions. Word has length 86 [2021-07-09 17:52:17,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:17,280 INFO L482 AbstractCegarLoop]: Abstraction has 159386 states and 348777 transitions. [2021-07-09 17:52:17,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:17,280 INFO L276 IsEmpty]: Start isEmpty. Operand 159386 states and 348777 transitions. [2021-07-09 17:52:17,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-07-09 17:52:17,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:17,968 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:18,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:18,169 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:18,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:18,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1615577670, now seen corresponding path program 129 times [2021-07-09 17:52:18,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:18,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770757284] [2021-07-09 17:52:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 104 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:52:18,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:18,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770757284] [2021-07-09 17:52:18,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770757284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:18,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348484627] [2021-07-09 17:52:18,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:18,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:52:18,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:18,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:52:18,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-07-09 17:52:18,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348484627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:18,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:18,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-07-09 17:52:18,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901824292] [2021-07-09 17:52:18,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:18,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:18,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:18,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:18,483 INFO L87 Difference]: Start difference. First operand 159386 states and 348777 transitions. Second operand has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:21,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:21,256 INFO L93 Difference]: Finished difference Result 275251 states and 593414 transitions. [2021-07-09 17:52:21,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-09 17:52:21,257 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-07-09 17:52:21,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:22,282 INFO L225 Difference]: With dead ends: 275251 [2021-07-09 17:52:22,282 INFO L226 Difference]: Without dead ends: 275139 [2021-07-09 17:52:22,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4118 ImplicationChecksByTransitivity, 1198.7ms TimeCoverageRelationStatistics Valid=1037, Invalid=10519, Unknown=0, NotChecked=0, Total=11556 [2021-07-09 17:52:22,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275139 states. [2021-07-09 17:52:26,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275139 to 204668. [2021-07-09 17:52:26,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204668 states, 204667 states have (on average 2.1685713866915526) internal successors, (443835), 204667 states have internal predecessors, (443835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:27,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204668 states to 204668 states and 443835 transitions. [2021-07-09 17:52:27,643 INFO L78 Accepts]: Start accepts. Automaton has 204668 states and 443835 transitions. Word has length 86 [2021-07-09 17:52:27,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:27,643 INFO L482 AbstractCegarLoop]: Abstraction has 204668 states and 443835 transitions. [2021-07-09 17:52:27,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:27,643 INFO L276 IsEmpty]: Start isEmpty. Operand 204668 states and 443835 transitions. [2021-07-09 17:52:27,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-07-09 17:52:27,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:27,819 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:28,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:28,019 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:28,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:28,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1849894491, now seen corresponding path program 130 times [2021-07-09 17:52:28,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:28,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76639334] [2021-07-09 17:52:28,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 196 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:28,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:28,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76639334] [2021-07-09 17:52:28,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76639334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:28,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375092583] [2021-07-09 17:52:28,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:28,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:28,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:28,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:52:28,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 144 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:52:28,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375092583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:28,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:28,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2021-07-09 17:52:28,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349117963] [2021-07-09 17:52:28,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:52:28,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:28,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:52:28,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:52:28,277 INFO L87 Difference]: Start difference. First operand 204668 states and 443835 transitions. Second operand has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:30,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:30,035 INFO L93 Difference]: Finished difference Result 247113 states and 534129 transitions. [2021-07-09 17:52:30,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:52:30,036 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-07-09 17:52:30,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:30,729 INFO L225 Difference]: With dead ends: 247113 [2021-07-09 17:52:30,729 INFO L226 Difference]: Without dead ends: 247095 [2021-07-09 17:52:30,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:52:31,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247095 states. [2021-07-09 17:52:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247095 to 223232. [2021-07-09 17:52:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223232 states, 223231 states have (on average 2.1722565414301775) internal successors, (484915), 223231 states have internal predecessors, (484915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:36,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223232 states to 223232 states and 484915 transitions. [2021-07-09 17:52:36,108 INFO L78 Accepts]: Start accepts. Automaton has 223232 states and 484915 transitions. Word has length 86 [2021-07-09 17:52:36,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:36,108 INFO L482 AbstractCegarLoop]: Abstraction has 223232 states and 484915 transitions. [2021-07-09 17:52:36,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:36,109 INFO L276 IsEmpty]: Start isEmpty. Operand 223232 states and 484915 transitions. [2021-07-09 17:52:36,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-07-09 17:52:36,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:36,835 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:37,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-07-09 17:52:37,036 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:37,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:37,036 INFO L82 PathProgramCache]: Analyzing trace with hash -23722169, now seen corresponding path program 131 times [2021-07-09 17:52:37,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:37,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386275558] [2021-07-09 17:52:37,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 106 proven. 132 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:52:37,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:37,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386275558] [2021-07-09 17:52:37,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386275558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:37,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961202263] [2021-07-09 17:52:37,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:37,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:52:37,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:37,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:52:37,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-07-09 17:52:37,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961202263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:37,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:37,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-09 17:52:37,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551823124] [2021-07-09 17:52:37,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:52:37,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:37,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:52:37,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:52:37,403 INFO L87 Difference]: Start difference. First operand 223232 states and 484915 transitions. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:38,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:38,743 INFO L93 Difference]: Finished difference Result 226999 states and 490880 transitions. [2021-07-09 17:52:38,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:52:38,744 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-07-09 17:52:38,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:39,306 INFO L225 Difference]: With dead ends: 226999 [2021-07-09 17:52:39,307 INFO L226 Difference]: Without dead ends: 226645 [2021-07-09 17:52:39,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:52:39,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226645 states. [2021-07-09 17:52:44,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226645 to 217428. [2021-07-09 17:52:44,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217428 states, 217427 states have (on average 2.1668835977132557) internal successors, (471139), 217427 states have internal predecessors, (471139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217428 states to 217428 states and 471139 transitions. [2021-07-09 17:52:45,915 INFO L78 Accepts]: Start accepts. Automaton has 217428 states and 471139 transitions. Word has length 86 [2021-07-09 17:52:45,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:45,915 INFO L482 AbstractCegarLoop]: Abstraction has 217428 states and 471139 transitions. [2021-07-09 17:52:45,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:45,916 INFO L276 IsEmpty]: Start isEmpty. Operand 217428 states and 471139 transitions. [2021-07-09 17:52:46,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-07-09 17:52:46,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:46,159 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:46,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:46,360 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:46,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:46,361 INFO L82 PathProgramCache]: Analyzing trace with hash -878968421, now seen corresponding path program 132 times [2021-07-09 17:52:46,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:46,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756125341] [2021-07-09 17:52:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:52:46,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:46,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756125341] [2021-07-09 17:52:46,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756125341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:46,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378979018] [2021-07-09 17:52:46,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:46,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:52:46,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:46,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:52:46,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:52:46,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378979018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:46,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:46,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:52:46,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187841384] [2021-07-09 17:52:46,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:52:46,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:46,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:52:46,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:52:46,710 INFO L87 Difference]: Start difference. First operand 217428 states and 471139 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:48,828 INFO L93 Difference]: Finished difference Result 237756 states and 514448 transitions. [2021-07-09 17:52:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:52:48,829 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-07-09 17:52:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:49,490 INFO L225 Difference]: With dead ends: 237756 [2021-07-09 17:52:49,491 INFO L226 Difference]: Without dead ends: 237672 [2021-07-09 17:52:49,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:52:49,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237672 states. [2021-07-09 17:52:53,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237672 to 232076. [2021-07-09 17:52:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232076 states, 232075 states have (on average 2.170931810837014) internal successors, (503819), 232075 states have internal predecessors, (503819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:54,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232076 states to 232076 states and 503819 transitions. [2021-07-09 17:52:54,789 INFO L78 Accepts]: Start accepts. Automaton has 232076 states and 503819 transitions. Word has length 86 [2021-07-09 17:52:54,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:54,789 INFO L482 AbstractCegarLoop]: Abstraction has 232076 states and 503819 transitions. [2021-07-09 17:52:54,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:54,790 INFO L276 IsEmpty]: Start isEmpty. Operand 232076 states and 503819 transitions. [2021-07-09 17:52:54,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-07-09 17:52:54,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:54,984 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:55,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-09 17:52:55,185 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:55,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:55,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1057664647, now seen corresponding path program 133 times [2021-07-09 17:52:55,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:55,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130110304] [2021-07-09 17:52:55,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 141 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:55,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:55,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130110304] [2021-07-09 17:52:55,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130110304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:55,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918541217] [2021-07-09 17:52:55,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:55,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:52:55,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 141 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:55,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918541217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:55,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:55,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-07-09 17:52:55,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983167190] [2021-07-09 17:52:55,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:52:55,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:55,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:52:55,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:52:55,441 INFO L87 Difference]: Start difference. First operand 232076 states and 503819 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:57,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:57,180 INFO L93 Difference]: Finished difference Result 252517 states and 547531 transitions. [2021-07-09 17:52:57,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:52:57,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-07-09 17:52:57,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:57,828 INFO L225 Difference]: With dead ends: 252517 [2021-07-09 17:52:57,829 INFO L226 Difference]: Without dead ends: 252517 [2021-07-09 17:52:57,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:52:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252517 states. [2021-07-09 17:53:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252517 to 241564. [2021-07-09 17:53:02,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241564 states, 241563 states have (on average 2.17548631205938) internal successors, (525517), 241563 states have internal predecessors, (525517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241564 states to 241564 states and 525517 transitions. [2021-07-09 17:53:03,735 INFO L78 Accepts]: Start accepts. Automaton has 241564 states and 525517 transitions. Word has length 86 [2021-07-09 17:53:03,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:03,735 INFO L482 AbstractCegarLoop]: Abstraction has 241564 states and 525517 transitions. [2021-07-09 17:53:03,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:03,736 INFO L276 IsEmpty]: Start isEmpty. Operand 241564 states and 525517 transitions. [2021-07-09 17:53:04,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 17:53:04,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:04,007 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:04,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:04,220 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:04,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:04,221 INFO L82 PathProgramCache]: Analyzing trace with hash 674063675, now seen corresponding path program 134 times [2021-07-09 17:53:04,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:04,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706191529] [2021-07-09 17:53:04,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 169 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:04,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:04,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706191529] [2021-07-09 17:53:04,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706191529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:04,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925107961] [2021-07-09 17:53:04,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:04,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:04,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:04,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:53:04,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 169 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:04,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925107961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:04,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:04,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-07-09 17:53:04,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993217380] [2021-07-09 17:53:04,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:53:04,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:04,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:53:04,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:53:04,543 INFO L87 Difference]: Start difference. First operand 241564 states and 525517 transitions. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:07,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:07,397 INFO L93 Difference]: Finished difference Result 283927 states and 618212 transitions. [2021-07-09 17:53:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:53:07,398 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 17:53:07,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:08,449 INFO L225 Difference]: With dead ends: 283927 [2021-07-09 17:53:08,449 INFO L226 Difference]: Without dead ends: 283661 [2021-07-09 17:53:08,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 302.0ms TimeCoverageRelationStatistics Valid=449, Invalid=883, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:53:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283661 states. [2021-07-09 17:53:15,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283661 to 277706. [2021-07-09 17:53:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277706 states, 277705 states have (on average 2.1876415620892673) internal successors, (607519), 277705 states have internal predecessors, (607519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277706 states to 277706 states and 607519 transitions. [2021-07-09 17:53:16,805 INFO L78 Accepts]: Start accepts. Automaton has 277706 states and 607519 transitions. Word has length 96 [2021-07-09 17:53:16,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:16,805 INFO L482 AbstractCegarLoop]: Abstraction has 277706 states and 607519 transitions. [2021-07-09 17:53:16,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:16,805 INFO L276 IsEmpty]: Start isEmpty. Operand 277706 states and 607519 transitions. [2021-07-09 17:53:17,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 17:53:17,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:17,554 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:17,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-09 17:53:17,754 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:17,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:17,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1146433393, now seen corresponding path program 135 times [2021-07-09 17:53:17,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:17,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339718359] [2021-07-09 17:53:17,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 149 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:17,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:17,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339718359] [2021-07-09 17:53:17,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339718359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:17,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621327011] [2021-07-09 17:53:17,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:17,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 17:53:17,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:17,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:53:17,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 149 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:17,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621327011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:17,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:17,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:53:17,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709233992] [2021-07-09 17:53:17,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:53:17,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:17,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:53:17,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:53:17,971 INFO L87 Difference]: Start difference. First operand 277706 states and 607519 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:19,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:19,426 INFO L93 Difference]: Finished difference Result 283289 states and 617046 transitions. [2021-07-09 17:53:19,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:53:19,426 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 17:53:19,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:20,569 INFO L225 Difference]: With dead ends: 283289 [2021-07-09 17:53:20,569 INFO L226 Difference]: Without dead ends: 283289 [2021-07-09 17:53:20,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:53:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283289 states. [2021-07-09 17:53:25,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283289 to 273694. [2021-07-09 17:53:26,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273694 states, 273693 states have (on average 2.184911561494083) internal successors, (597995), 273693 states have internal predecessors, (597995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:27,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273694 states to 273694 states and 597995 transitions. [2021-07-09 17:53:27,634 INFO L78 Accepts]: Start accepts. Automaton has 273694 states and 597995 transitions. Word has length 96 [2021-07-09 17:53:27,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:27,634 INFO L482 AbstractCegarLoop]: Abstraction has 273694 states and 597995 transitions. [2021-07-09 17:53:27,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:27,634 INFO L276 IsEmpty]: Start isEmpty. Operand 273694 states and 597995 transitions. [2021-07-09 17:53:27,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 17:53:27,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:27,932 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:28,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-09 17:53:28,133 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:28,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:28,133 INFO L82 PathProgramCache]: Analyzing trace with hash 918490171, now seen corresponding path program 136 times [2021-07-09 17:53:28,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:28,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753342000] [2021-07-09 17:53:28,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:53:28,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:28,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753342000] [2021-07-09 17:53:28,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753342000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:28,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398763385] [2021-07-09 17:53:28,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:28,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:53:28,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:28,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:53:28,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:53:28,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398763385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:28,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:28,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:53:28,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604424421] [2021-07-09 17:53:28,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:53:28,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:28,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:53:28,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:53:28,352 INFO L87 Difference]: Start difference. First operand 273694 states and 597995 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:30,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:30,157 INFO L93 Difference]: Finished difference Result 283158 states and 616236 transitions. [2021-07-09 17:53:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:53:30,157 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 17:53:30,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:30,903 INFO L225 Difference]: With dead ends: 283158 [2021-07-09 17:53:30,903 INFO L226 Difference]: Without dead ends: 283152 [2021-07-09 17:53:30,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:53:31,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283152 states. [2021-07-09 17:53:36,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283152 to 277546. [2021-07-09 17:53:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277546 states, 277545 states have (on average 2.1873894323443044) internal successors, (607099), 277545 states have internal predecessors, (607099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277546 states to 277546 states and 607099 transitions. [2021-07-09 17:53:37,978 INFO L78 Accepts]: Start accepts. Automaton has 277546 states and 607099 transitions. Word has length 96 [2021-07-09 17:53:37,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:37,978 INFO L482 AbstractCegarLoop]: Abstraction has 277546 states and 607099 transitions. [2021-07-09 17:53:37,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:37,978 INFO L276 IsEmpty]: Start isEmpty. Operand 277546 states and 607099 transitions. [2021-07-09 17:53:39,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 17:53:39,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:39,029 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:39,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:39,252 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:39,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:39,253 INFO L82 PathProgramCache]: Analyzing trace with hash -2102089585, now seen corresponding path program 137 times [2021-07-09 17:53:39,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:39,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741558575] [2021-07-09 17:53:39,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 155 proven. 145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:53:39,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:39,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741558575] [2021-07-09 17:53:39,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741558575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:39,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111904967] [2021-07-09 17:53:39,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:39,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:53:39,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:39,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:53:39,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 155 proven. 145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:53:39,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111904967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:39,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:39,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:53:39,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174434872] [2021-07-09 17:53:39,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:53:39,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:39,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:53:39,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:53:39,511 INFO L87 Difference]: Start difference. First operand 277546 states and 607099 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:41,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:41,459 INFO L93 Difference]: Finished difference Result 287744 states and 625793 transitions. [2021-07-09 17:53:41,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:53:41,459 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 17:53:41,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:43,148 INFO L225 Difference]: With dead ends: 287744 [2021-07-09 17:53:43,148 INFO L226 Difference]: Without dead ends: 287744 [2021-07-09 17:53:43,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:53:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287744 states. [2021-07-09 17:53:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287744 to 277562. [2021-07-09 17:53:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277562 states, 277561 states have (on average 2.1872056953246313) internal successors, (607083), 277561 states have internal predecessors, (607083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:50,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277562 states to 277562 states and 607083 transitions. [2021-07-09 17:53:50,612 INFO L78 Accepts]: Start accepts. Automaton has 277562 states and 607083 transitions. Word has length 96 [2021-07-09 17:53:50,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:50,612 INFO L482 AbstractCegarLoop]: Abstraction has 277562 states and 607083 transitions. [2021-07-09 17:53:50,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:50,612 INFO L276 IsEmpty]: Start isEmpty. Operand 277562 states and 607083 transitions. [2021-07-09 17:53:51,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 17:53:51,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:51,408 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:51,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-09 17:53:51,620 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:51,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:51,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1613419717, now seen corresponding path program 138 times [2021-07-09 17:53:51,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:51,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652564018] [2021-07-09 17:53:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:51,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:51,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652564018] [2021-07-09 17:53:51,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652564018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:51,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556675149] [2021-07-09 17:53:51,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:51,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 17:53:51,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:51,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:53:51,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:51,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556675149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:51,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:51,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:53:51,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428236415] [2021-07-09 17:53:51,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:53:51,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:51,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:53:51,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:53:51,848 INFO L87 Difference]: Start difference. First operand 277562 states and 607083 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:53,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:53,290 INFO L93 Difference]: Finished difference Result 287474 states and 626678 transitions. [2021-07-09 17:53:53,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:53:53,291 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 17:53:53,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:54,425 INFO L225 Difference]: With dead ends: 287474 [2021-07-09 17:53:54,426 INFO L226 Difference]: Without dead ends: 287474 [2021-07-09 17:53:54,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:54,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287474 states. [2021-07-09 17:53:59,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287474 to 273034. [2021-07-09 17:54:00,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273034 states, 273033 states have (on average 2.184860438115539) internal successors, (596539), 273033 states have internal predecessors, (596539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:01,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273034 states to 273034 states and 596539 transitions. [2021-07-09 17:54:01,589 INFO L78 Accepts]: Start accepts. Automaton has 273034 states and 596539 transitions. Word has length 96 [2021-07-09 17:54:01,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:01,589 INFO L482 AbstractCegarLoop]: Abstraction has 273034 states and 596539 transitions. [2021-07-09 17:54:01,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:01,590 INFO L276 IsEmpty]: Start isEmpty. Operand 273034 states and 596539 transitions. [2021-07-09 17:54:01,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 17:54:01,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:01,883 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:02,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:02,083 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:02,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:02,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1353462105, now seen corresponding path program 139 times [2021-07-09 17:54:02,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:02,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071271031] [2021-07-09 17:54:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 168 proven. 128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:54:02,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:02,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071271031] [2021-07-09 17:54:02,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071271031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:02,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22163912] [2021-07-09 17:54:02,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:02,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:54:02,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 168 proven. 128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:54:02,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22163912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:02,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:02,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:54:02,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231895452] [2021-07-09 17:54:02,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:54:02,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:02,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:54:02,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:54:02,637 INFO L87 Difference]: Start difference. First operand 273034 states and 596539 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:04,518 INFO L93 Difference]: Finished difference Result 292897 states and 638403 transitions. [2021-07-09 17:54:04,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:54:04,518 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 17:54:04,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:05,810 INFO L225 Difference]: With dead ends: 292897 [2021-07-09 17:54:05,810 INFO L226 Difference]: Without dead ends: 292861 [2021-07-09 17:54:05,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:54:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292861 states. [2021-07-09 17:54:11,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292861 to 277790. [2021-07-09 17:54:11,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277790 states, 277789 states have (on average 2.1869656465878777) internal successors, (607515), 277789 states have internal predecessors, (607515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:13,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277790 states to 277790 states and 607515 transitions. [2021-07-09 17:54:13,054 INFO L78 Accepts]: Start accepts. Automaton has 277790 states and 607515 transitions. Word has length 96 [2021-07-09 17:54:13,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:13,054 INFO L482 AbstractCegarLoop]: Abstraction has 277790 states and 607515 transitions. [2021-07-09 17:54:13,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:13,054 INFO L276 IsEmpty]: Start isEmpty. Operand 277790 states and 607515 transitions. [2021-07-09 17:54:13,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 17:54:13,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:13,863 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:14,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:14,063 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:14,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:14,064 INFO L82 PathProgramCache]: Analyzing trace with hash 357861435, now seen corresponding path program 140 times [2021-07-09 17:54:14,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:14,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191954628] [2021-07-09 17:54:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:14,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:14,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191954628] [2021-07-09 17:54:14,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191954628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:14,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649008929] [2021-07-09 17:54:14,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:14,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:14,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:14,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:54:14,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:14,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649008929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:14,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:14,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:54:14,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486661770] [2021-07-09 17:54:14,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:54:14,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:14,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:54:14,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:54:14,267 INFO L87 Difference]: Start difference. First operand 277790 states and 607515 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:15,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:15,707 INFO L93 Difference]: Finished difference Result 289842 states and 631433 transitions. [2021-07-09 17:54:15,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:54:15,707 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 17:54:15,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:16,899 INFO L225 Difference]: With dead ends: 289842 [2021-07-09 17:54:16,900 INFO L226 Difference]: Without dead ends: 289806 [2021-07-09 17:54:16,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:54:17,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289806 states. [2021-07-09 17:54:22,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289806 to 279306. [2021-07-09 17:54:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279306 states, 279305 states have (on average 2.1874259322246288) internal successors, (610959), 279305 states have internal predecessors, (610959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279306 states to 279306 states and 610959 transitions. [2021-07-09 17:54:23,915 INFO L78 Accepts]: Start accepts. Automaton has 279306 states and 610959 transitions. Word has length 96 [2021-07-09 17:54:23,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:23,916 INFO L482 AbstractCegarLoop]: Abstraction has 279306 states and 610959 transitions. [2021-07-09 17:54:23,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:23,916 INFO L276 IsEmpty]: Start isEmpty. Operand 279306 states and 610959 transitions. [2021-07-09 17:54:24,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 17:54:24,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:24,226 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:24,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:24,426 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:24,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:24,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1632248975, now seen corresponding path program 141 times [2021-07-09 17:54:24,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:24,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521387143] [2021-07-09 17:54:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 183 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:24,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:24,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521387143] [2021-07-09 17:54:24,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521387143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:24,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597269578] [2021-07-09 17:54:24,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:24,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:54:24,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:24,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:54:24,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:24,933 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-09 17:54:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 183 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:24,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597269578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:24,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:24,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:54:24,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353751847] [2021-07-09 17:54:24,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:54:24,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:24,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:54:24,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:54:24,988 INFO L87 Difference]: Start difference. First operand 279306 states and 610959 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:26,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:26,483 INFO L93 Difference]: Finished difference Result 293716 states and 638382 transitions. [2021-07-09 17:54:26,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:54:26,483 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 17:54:26,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:27,671 INFO L225 Difference]: With dead ends: 293716 [2021-07-09 17:54:27,671 INFO L226 Difference]: Without dead ends: 293716 [2021-07-09 17:54:27,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:54:27,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293716 states. [2021-07-09 17:54:33,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293716 to 279290. [2021-07-09 17:54:33,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279290 states, 279289 states have (on average 2.1870356512429776) internal successors, (610815), 279289 states have internal predecessors, (610815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279290 states to 279290 states and 610815 transitions. [2021-07-09 17:54:35,644 INFO L78 Accepts]: Start accepts. Automaton has 279290 states and 610815 transitions. Word has length 96 [2021-07-09 17:54:35,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:35,645 INFO L482 AbstractCegarLoop]: Abstraction has 279290 states and 610815 transitions. [2021-07-09 17:54:35,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:35,645 INFO L276 IsEmpty]: Start isEmpty. Operand 279290 states and 610815 transitions. [2021-07-09 17:54:36,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 17:54:36,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:36,047 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:36,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:36,261 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:36,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:36,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1052790981, now seen corresponding path program 142 times [2021-07-09 17:54:36,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:36,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426790579] [2021-07-09 17:54:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 170 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:36,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:36,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426790579] [2021-07-09 17:54:36,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426790579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:36,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858245193] [2021-07-09 17:54:36,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:36,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:36,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:36,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:54:36,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:36,795 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-09 17:54:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 170 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:36,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858245193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:36,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:36,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:54:36,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904589643] [2021-07-09 17:54:36,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:54:36,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:36,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:54:36,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:54:36,874 INFO L87 Difference]: Start difference. First operand 279290 states and 610815 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:38,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:38,828 INFO L93 Difference]: Finished difference Result 305876 states and 664178 transitions. [2021-07-09 17:54:38,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:54:38,829 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 17:54:38,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:40,427 INFO L225 Difference]: With dead ends: 305876 [2021-07-09 17:54:40,427 INFO L226 Difference]: Without dead ends: 305876 [2021-07-09 17:54:40,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:40,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305876 states. [2021-07-09 17:54:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305876 to 279450. [2021-07-09 17:54:47,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279450 states, 279449 states have (on average 2.186928562993605) internal successors, (611135), 279449 states have internal predecessors, (611135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279450 states to 279450 states and 611135 transitions. [2021-07-09 17:54:47,933 INFO L78 Accepts]: Start accepts. Automaton has 279450 states and 611135 transitions. Word has length 96 [2021-07-09 17:54:47,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:47,933 INFO L482 AbstractCegarLoop]: Abstraction has 279450 states and 611135 transitions. [2021-07-09 17:54:47,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 279450 states and 611135 transitions. [2021-07-09 17:54:48,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 17:54:48,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:48,788 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:54:48,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-07-09 17:54:48,988 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:48,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:48,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1789311385, now seen corresponding path program 143 times [2021-07-09 17:54:48,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:48,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965773646] [2021-07-09 17:54:48,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:49,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:49,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965773646] [2021-07-09 17:54:49,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965773646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:49,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212373858] [2021-07-09 17:54:49,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:49,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 17:54:49,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:49,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:54:49,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:49,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212373858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:49,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:49,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:54:49,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475183788] [2021-07-09 17:54:49,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:54:49,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:49,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:54:49,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:54:49,217 INFO L87 Difference]: Start difference. First operand 279450 states and 611135 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:51,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:51,090 INFO L93 Difference]: Finished difference Result 291374 states and 635903 transitions. [2021-07-09 17:54:51,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:54:51,090 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 17:54:51,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:51,918 INFO L225 Difference]: With dead ends: 291374 [2021-07-09 17:54:51,918 INFO L226 Difference]: Without dead ends: 291374 [2021-07-09 17:54:51,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:52,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291374 states. [2021-07-09 17:54:57,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291374 to 275266. [2021-07-09 17:54:58,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275266 states, 275265 states have (on average 2.185221513813961) internal successors, (601515), 275265 states have internal predecessors, (601515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:00,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275266 states to 275266 states and 601515 transitions. [2021-07-09 17:55:00,146 INFO L78 Accepts]: Start accepts. Automaton has 275266 states and 601515 transitions. Word has length 96 [2021-07-09 17:55:00,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:00,146 INFO L482 AbstractCegarLoop]: Abstraction has 275266 states and 601515 transitions. [2021-07-09 17:55:00,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:00,146 INFO L276 IsEmpty]: Start isEmpty. Operand 275266 states and 601515 transitions. [2021-07-09 17:55:01,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 17:55:01,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:01,128 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:01,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-07-09 17:55:01,329 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:01,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:01,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1671232901, now seen corresponding path program 144 times [2021-07-09 17:55:01,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:01,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257078231] [2021-07-09 17:55:01,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 155 proven. 135 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 17:55:01,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:01,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257078231] [2021-07-09 17:55:01,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257078231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:01,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486190964] [2021-07-09 17:55:01,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:01,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:55:01,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:01,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:55:01,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 155 proven. 135 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 17:55:01,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486190964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:01,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:01,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:55:01,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402933011] [2021-07-09 17:55:01,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:55:01,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:01,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:55:01,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:55:01,583 INFO L87 Difference]: Start difference. First operand 275266 states and 601515 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:03,469 INFO L93 Difference]: Finished difference Result 284381 states and 619091 transitions. [2021-07-09 17:55:03,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:55:03,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 17:55:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:05,131 INFO L225 Difference]: With dead ends: 284381 [2021-07-09 17:55:05,131 INFO L226 Difference]: Without dead ends: 284315 [2021-07-09 17:55:05,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:55:05,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284315 states. [2021-07-09 17:55:10,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284315 to 279242. [2021-07-09 17:55:11,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279242 states, 279241 states have (on average 2.1870821261920708) internal successors, (610723), 279241 states have internal predecessors, (610723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:12,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279242 states to 279242 states and 610723 transitions. [2021-07-09 17:55:12,785 INFO L78 Accepts]: Start accepts. Automaton has 279242 states and 610723 transitions. Word has length 96 [2021-07-09 17:55:12,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:12,785 INFO L482 AbstractCegarLoop]: Abstraction has 279242 states and 610723 transitions. [2021-07-09 17:55:12,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:12,785 INFO L276 IsEmpty]: Start isEmpty. Operand 279242 states and 610723 transitions. [2021-07-09 17:55:13,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 17:55:13,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:13,134 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:13,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-09 17:55:13,334 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:13,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:13,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1688440827, now seen corresponding path program 145 times [2021-07-09 17:55:13,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:13,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284046991] [2021-07-09 17:55:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 188 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:55:13,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:13,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284046991] [2021-07-09 17:55:13,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284046991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:13,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810849812] [2021-07-09 17:55:13,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:13,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:55:13,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 188 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:55:13,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810849812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:13,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:13,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:55:13,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130874076] [2021-07-09 17:55:13,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:55:13,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:13,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:55:13,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:55:13,543 INFO L87 Difference]: Start difference. First operand 279242 states and 610723 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:15,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:15,607 INFO L93 Difference]: Finished difference Result 298839 states and 651898 transitions. [2021-07-09 17:55:15,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:55:15,607 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 17:55:15,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:16,542 INFO L225 Difference]: With dead ends: 298839 [2021-07-09 17:55:16,543 INFO L226 Difference]: Without dead ends: 298803 [2021-07-09 17:55:16,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:55:17,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298803 states. [2021-07-09 17:55:22,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298803 to 280042. [2021-07-09 17:55:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280042 states, 280041 states have (on average 2.1865476840891156) internal successors, (612323), 280041 states have internal predecessors, (612323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:25,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280042 states to 280042 states and 612323 transitions. [2021-07-09 17:55:25,577 INFO L78 Accepts]: Start accepts. Automaton has 280042 states and 612323 transitions. Word has length 96 [2021-07-09 17:55:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:25,577 INFO L482 AbstractCegarLoop]: Abstraction has 280042 states and 612323 transitions. [2021-07-09 17:55:25,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 280042 states and 612323 transitions. [2021-07-09 17:55:26,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 17:55:26,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:26,620 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:26,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-09 17:55:26,856 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:26,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:26,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1617030203, now seen corresponding path program 146 times [2021-07-09 17:55:26,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:26,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396160758] [2021-07-09 17:55:26,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 223 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:55:26,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:26,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396160758] [2021-07-09 17:55:26,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396160758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:26,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449012652] [2021-07-09 17:55:26,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:26,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:26,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:26,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:55:26,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 223 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:55:27,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449012652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:27,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:27,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:55:27,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294541269] [2021-07-09 17:55:27,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:55:27,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:27,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:55:27,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:55:27,105 INFO L87 Difference]: Start difference. First operand 280042 states and 612323 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:29,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:29,369 INFO L93 Difference]: Finished difference Result 294586 states and 641708 transitions. [2021-07-09 17:55:29,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:55:29,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 17:55:29,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:31,023 INFO L225 Difference]: With dead ends: 294586 [2021-07-09 17:55:31,023 INFO L226 Difference]: Without dead ends: 294544 [2021-07-09 17:55:31,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:55:31,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294544 states. [2021-07-09 17:55:36,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294544 to 284094. [2021-07-09 17:55:37,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284094 states, 284093 states have (on average 2.187280221617569) internal successors, (621391), 284093 states have internal predecessors, (621391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284094 states to 284094 states and 621391 transitions. [2021-07-09 17:55:38,875 INFO L78 Accepts]: Start accepts. Automaton has 284094 states and 621391 transitions. Word has length 96 [2021-07-09 17:55:38,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:38,875 INFO L482 AbstractCegarLoop]: Abstraction has 284094 states and 621391 transitions. [2021-07-09 17:55:38,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:38,875 INFO L276 IsEmpty]: Start isEmpty. Operand 284094 states and 621391 transitions. [2021-07-09 17:55:39,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 17:55:39,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:39,750 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:39,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-09 17:55:39,950 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:39,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:39,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1403549553, now seen corresponding path program 147 times [2021-07-09 17:55:39,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:39,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199128635] [2021-07-09 17:55:39,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:55:40,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:40,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199128635] [2021-07-09 17:55:40,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199128635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:40,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820219280] [2021-07-09 17:55:40,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:40,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 17:55:40,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:40,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:55:40,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:55:40,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820219280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:40,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:40,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:55:40,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831627362] [2021-07-09 17:55:40,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:55:40,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:40,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:55:40,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:55:40,184 INFO L87 Difference]: Start difference. First operand 284094 states and 621391 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:41,788 INFO L93 Difference]: Finished difference Result 301944 states and 656167 transitions. [2021-07-09 17:55:41,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:55:41,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 17:55:41,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:43,216 INFO L225 Difference]: With dead ends: 301944 [2021-07-09 17:55:43,216 INFO L226 Difference]: Without dead ends: 301944 [2021-07-09 17:55:43,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:55:43,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301944 states. [2021-07-09 17:55:49,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301944 to 284134. [2021-07-09 17:55:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284134 states, 284133 states have (on average 2.186831519042139) internal successors, (621351), 284133 states have internal predecessors, (621351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:51,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284134 states to 284134 states and 621351 transitions. [2021-07-09 17:55:51,670 INFO L78 Accepts]: Start accepts. Automaton has 284134 states and 621351 transitions. Word has length 96 [2021-07-09 17:55:51,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:51,670 INFO L482 AbstractCegarLoop]: Abstraction has 284134 states and 621351 transitions. [2021-07-09 17:55:51,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:51,671 INFO L276 IsEmpty]: Start isEmpty. Operand 284134 states and 621351 transitions. [2021-07-09 17:55:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 17:55:52,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:52,711 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:55:52,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-09 17:55:52,933 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:52,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:52,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1983007547, now seen corresponding path program 148 times [2021-07-09 17:55:52,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:52,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241868412] [2021-07-09 17:55:52,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 191 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:55:53,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:53,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241868412] [2021-07-09 17:55:53,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241868412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:53,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090723176] [2021-07-09 17:55:53,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:53,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:55:53,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:53,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:55:53,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 191 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:55:53,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090723176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:53,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:53,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:55:53,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756449246] [2021-07-09 17:55:53,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:55:53,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:53,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:55:53,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:55:53,289 INFO L87 Difference]: Start difference. First operand 284134 states and 621351 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:55,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:55,994 INFO L93 Difference]: Finished difference Result 329236 states and 714209 transitions. [2021-07-09 17:55:56,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:55:56,017 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 17:55:56,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:57,605 INFO L225 Difference]: With dead ends: 329236 [2021-07-09 17:55:57,606 INFO L226 Difference]: Without dead ends: 329236 [2021-07-09 17:55:57,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=231, Invalid=369, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:55:58,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329236 states. [2021-07-09 17:56:04,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329236 to 284210. [2021-07-09 17:56:04,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284210 states, 284209 states have (on average 2.1864367419750956) internal successors, (621405), 284209 states have internal predecessors, (621405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284210 states to 284210 states and 621405 transitions. [2021-07-09 17:56:06,154 INFO L78 Accepts]: Start accepts. Automaton has 284210 states and 621405 transitions. Word has length 96 [2021-07-09 17:56:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:06,154 INFO L482 AbstractCegarLoop]: Abstraction has 284210 states and 621405 transitions. [2021-07-09 17:56:06,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 284210 states and 621405 transitions. [2021-07-09 17:56:06,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 17:56:06,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:06,516 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:06,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:06,717 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:06,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:06,717 INFO L82 PathProgramCache]: Analyzing trace with hash -530142617, now seen corresponding path program 149 times [2021-07-09 17:56:06,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:06,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963120641] [2021-07-09 17:56:06,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 166 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:56:06,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:06,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963120641] [2021-07-09 17:56:06,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963120641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:06,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266370898] [2021-07-09 17:56:06,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:06,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:56:06,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:06,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:56:06,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 166 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:56:06,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266370898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:06,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:06,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:56:06,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167764051] [2021-07-09 17:56:06,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:56:06,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:06,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:56:06,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:56:06,948 INFO L87 Difference]: Start difference. First operand 284210 states and 621405 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:09,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:09,078 INFO L93 Difference]: Finished difference Result 319340 states and 693417 transitions. [2021-07-09 17:56:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:56:09,078 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 17:56:09,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:10,175 INFO L225 Difference]: With dead ends: 319340 [2021-07-09 17:56:10,176 INFO L226 Difference]: Without dead ends: 319340 [2021-07-09 17:56:10,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:56:10,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319340 states. [2021-07-09 17:56:16,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319340 to 284530. [2021-07-09 17:56:17,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284530 states, 284529 states have (on average 2.186227062970734) internal successors, (622045), 284529 states have internal predecessors, (622045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:18,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284530 states to 284530 states and 622045 transitions. [2021-07-09 17:56:18,529 INFO L78 Accepts]: Start accepts. Automaton has 284530 states and 622045 transitions. Word has length 96 [2021-07-09 17:56:18,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:18,529 INFO L482 AbstractCegarLoop]: Abstraction has 284530 states and 622045 transitions. [2021-07-09 17:56:18,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:18,529 INFO L276 IsEmpty]: Start isEmpty. Operand 284530 states and 622045 transitions. [2021-07-09 17:56:18,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-07-09 17:56:18,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:18,871 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:56:19,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:19,071 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:19,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:19,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1903353413, now seen corresponding path program 150 times [2021-07-09 17:56:19,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:19,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071918517] [2021-07-09 17:56:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:19,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:19,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071918517] [2021-07-09 17:56:19,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071918517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:19,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452250688] [2021-07-09 17:56:19,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:19,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-09 17:56:19,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:19,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:56:19,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:19,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452250688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:19,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:19,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-09 17:56:19,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484553634] [2021-07-09 17:56:19,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:56:19,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:19,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:56:19,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:56:19,311 INFO L87 Difference]: Start difference. First operand 284530 states and 622045 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:21,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:21,417 INFO L93 Difference]: Finished difference Result 297354 states and 649674 transitions. [2021-07-09 17:56:21,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:56:21,418 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-07-09 17:56:21,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:22,426 INFO L225 Difference]: With dead ends: 297354 [2021-07-09 17:56:22,427 INFO L226 Difference]: Without dead ends: 297354 [2021-07-09 17:56:22,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=249, Invalid=453, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:56:23,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297354 states. [2021-07-09 17:56:28,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297354 to 282646. [2021-07-09 17:56:29,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282646 states, 282645 states have (on average 2.186350368837234) internal successors, (617961), 282645 states have internal predecessors, (617961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)