/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 06:20:54,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:20:54,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:20:54,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 06:20:54,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 06:20:54,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 06:20:54,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 06:20:54,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 06:20:54,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 06:20:54,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 06:20:54,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 06:20:54,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 06:20:54,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 06:20:54,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 06:20:54,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 06:20:54,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 06:20:54,548 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:20:54,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:20:54,549 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:20:54,549 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:20:54,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:20:54,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:20:54,550 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:20:54,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:20:54,551 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:20:54,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:20:54,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:20:54,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:20:54,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:20:54,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:20:54,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:20:54,552 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:20:54,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:20:54,552 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:20:54,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:20:54,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:20:54,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:20:54,553 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:20:54,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:20:54,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:20:54,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:20:54,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:20:54,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:20:54,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:20:54,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:20:54,555 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:20:54,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:20:54,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:20:54,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:20:54,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:20:54,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:20:54,875 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:20:54,877 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:20:54,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl [2021-06-05 06:20:54,878 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl' [2021-06-05 06:20:54,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:20:54,910 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:20:54,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:20:54,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:20:54,911 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:20:54,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:54" (1/1) ... [2021-06-05 06:20:54,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:54" (1/1) ... [2021-06-05 06:20:54,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:20:54,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:20:54,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:20:54,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:20:54,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:54" (1/1) ... [2021-06-05 06:20:54,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:54" (1/1) ... [2021-06-05 06:20:54,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:54" (1/1) ... [2021-06-05 06:20:54,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:54" (1/1) ... [2021-06-05 06:20:54,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:54" (1/1) ... [2021-06-05 06:20:54,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:54" (1/1) ... [2021-06-05 06:20:54,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:54" (1/1) ... [2021-06-05 06:20:54,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:20:54,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:20:54,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:20:54,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:20:54,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:20:55,027 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:20:55,027 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:20:55,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:20:55,027 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:20:55,027 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:20:55,028 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:20:55,028 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:20:55,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:20:55,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:20:55,028 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 06:20:55,028 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 06:20:55,028 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 06:20:55,029 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 06:20:55,029 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 06:20:55,029 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 06:20:55,030 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 06:20:55,319 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:20:55,320 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 06:20:55,321 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:20:55 BoogieIcfgContainer [2021-06-05 06:20:55,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:20:55,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:20:55,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:20:55,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:20:55,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:20:54" (1/2) ... [2021-06-05 06:20:55,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693a88ba and model type buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:20:55, skipping insertion in model container [2021-06-05 06:20:55,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:20:55" (2/2) ... [2021-06-05 06:20:55,328 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series-array.wvr.bpl [2021-06-05 06:20:55,341 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:20:55,341 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:20:55,341 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:20:55,342 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:20:55,421 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 06:20:55,440 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 06:20:55,471 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:20:55,471 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:20:55,472 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:20:55,473 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:20:55,473 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:20:55,473 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:20:55,473 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:20:55,473 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:20:55,485 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-06-05 06:20:55,547 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:55,551 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:55,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 06:20:55,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:55,575 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:55,575 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:55,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:55,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1591089523, now seen corresponding path program 1 times [2021-06-05 06:20:55,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:55,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389746577] [2021-06-05 06:20:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:55,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:55,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389746577] [2021-06-05 06:20:55,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389746577] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:55,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:20:55,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 06:20:55,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770590105] [2021-06-05 06:20:55,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:20:55,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:55,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:20:55,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:20:55,773 INFO L87 Difference]: Start difference. First operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:55,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:55,837 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2021-06-05 06:20:55,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:20:55,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 06:20:55,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:55,864 INFO L225 Difference]: With dead ends: 1236 [2021-06-05 06:20:55,864 INFO L226 Difference]: Without dead ends: 1109 [2021-06-05 06:20:55,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:20:55,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-06-05 06:20:55,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-06-05 06:20:55,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:55,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-06-05 06:20:55,976 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-06-05 06:20:55,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:55,977 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-06-05 06:20:55,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:55,978 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-06-05 06:20:55,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:20:55,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:55,982 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:55,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:20:55,983 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:55,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:55,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1256412427, now seen corresponding path program 1 times [2021-06-05 06:20:55,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:55,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992521344] [2021-06-05 06:20:55,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:56,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:56,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992521344] [2021-06-05 06:20:56,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992521344] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:56,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:20:56,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:20:56,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478148872] [2021-06-05 06:20:56,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:56,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:56,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:56,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:56,070 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:56,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:56,141 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2021-06-05 06:20:56,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:20:56,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 06:20:56,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:56,151 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 06:20:56,152 INFO L226 Difference]: Without dead ends: 1418 [2021-06-05 06:20:56,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:56,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-06-05 06:20:56,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-06-05 06:20:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-06-05 06:20:56,215 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-06-05 06:20:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:56,215 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-06-05 06:20:56,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-06-05 06:20:56,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:20:56,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:56,220 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:56,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 06:20:56,221 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:56,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:56,221 INFO L82 PathProgramCache]: Analyzing trace with hash -898961871, now seen corresponding path program 1 times [2021-06-05 06:20:56,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:56,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376030269] [2021-06-05 06:20:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:56,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:56,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:56,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376030269] [2021-06-05 06:20:56,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376030269] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:56,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:20:56,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:20:56,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788484248] [2021-06-05 06:20:56,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:56,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:56,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:56,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:56,297 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:56,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:56,362 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2021-06-05 06:20:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:20:56,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 06:20:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:56,377 INFO L225 Difference]: With dead ends: 2017 [2021-06-05 06:20:56,378 INFO L226 Difference]: Without dead ends: 1875 [2021-06-05 06:20:56,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:56,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-06-05 06:20:56,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-06-05 06:20:56,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-06-05 06:20:56,443 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-06-05 06:20:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:56,443 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-06-05 06:20:56,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-06-05 06:20:56,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:20:56,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:56,452 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:56,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 06:20:56,452 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:56,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:56,453 INFO L82 PathProgramCache]: Analyzing trace with hash 100882901, now seen corresponding path program 1 times [2021-06-05 06:20:56,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:56,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971850306] [2021-06-05 06:20:56,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:56,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:56,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971850306] [2021-06-05 06:20:56,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971850306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:56,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122179519] [2021-06-05 06:20:56,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:56,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:20:56,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:56,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122179519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:56,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:56,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-05 06:20:56,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738944826] [2021-06-05 06:20:56,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:20:56,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:56,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:20:56,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:20:56,816 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:56,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:56,931 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2021-06-05 06:20:56,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:20:56,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 24 [2021-06-05 06:20:56,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:56,945 INFO L225 Difference]: With dead ends: 2308 [2021-06-05 06:20:56,945 INFO L226 Difference]: Without dead ends: 2108 [2021-06-05 06:20:56,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:20:56,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-06-05 06:20:56,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-06-05 06:20:56,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-06-05 06:20:57,004 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-06-05 06:20:57,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:57,004 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-06-05 06:20:57,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-06-05 06:20:57,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:20:57,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:57,009 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:57,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:57,232 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:57,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:57,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1771388146, now seen corresponding path program 1 times [2021-06-05 06:20:57,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:57,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781370377] [2021-06-05 06:20:57,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:57,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:57,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781370377] [2021-06-05 06:20:57,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781370377] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:57,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:20:57,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:20:57,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365322494] [2021-06-05 06:20:57,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:57,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:57,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:57,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:57,263 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:57,340 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2021-06-05 06:20:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:20:57,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:20:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:57,352 INFO L225 Difference]: With dead ends: 1950 [2021-06-05 06:20:57,352 INFO L226 Difference]: Without dead ends: 1860 [2021-06-05 06:20:57,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:57,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-06-05 06:20:57,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-06-05 06:20:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-06-05 06:20:57,407 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-06-05 06:20:57,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:57,407 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-06-05 06:20:57,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-06-05 06:20:57,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:20:57,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:57,413 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:57,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 06:20:57,413 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:57,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:57,414 INFO L82 PathProgramCache]: Analyzing trace with hash 2115354510, now seen corresponding path program 2 times [2021-06-05 06:20:57,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:57,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034670755] [2021-06-05 06:20:57,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:57,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:57,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034670755] [2021-06-05 06:20:57,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034670755] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:57,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:20:57,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:20:57,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336696797] [2021-06-05 06:20:57,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:57,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:57,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:57,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:57,458 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:57,529 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2021-06-05 06:20:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:20:57,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:20:57,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:57,537 INFO L225 Difference]: With dead ends: 1308 [2021-06-05 06:20:57,537 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 06:20:57,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:57,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 06:20:57,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-06-05 06:20:57,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-06-05 06:20:57,572 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-06-05 06:20:57,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:57,572 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-06-05 06:20:57,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-06-05 06:20:57,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:20:57,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:57,575 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:57,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 06:20:57,576 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:57,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:57,577 INFO L82 PathProgramCache]: Analyzing trace with hash 373109395, now seen corresponding path program 2 times [2021-06-05 06:20:57,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:57,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381084587] [2021-06-05 06:20:57,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:57,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:57,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381084587] [2021-06-05 06:20:57,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381084587] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:57,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:20:57,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:20:57,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117117383] [2021-06-05 06:20:57,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:57,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:57,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:57,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:57,634 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:57,681 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2021-06-05 06:20:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:20:57,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:20:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:57,689 INFO L225 Difference]: With dead ends: 1142 [2021-06-05 06:20:57,689 INFO L226 Difference]: Without dead ends: 1120 [2021-06-05 06:20:57,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:57,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-06-05 06:20:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-06-05 06:20:57,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-06-05 06:20:57,722 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-06-05 06:20:57,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:57,723 INFO L482 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-06-05 06:20:57,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-06-05 06:20:57,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:20:57,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:57,727 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:57,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 06:20:57,727 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:57,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:57,728 INFO L82 PathProgramCache]: Analyzing trace with hash -896204878, now seen corresponding path program 1 times [2021-06-05 06:20:57,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:57,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922232066] [2021-06-05 06:20:57,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:20:57,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:57,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922232066] [2021-06-05 06:20:57,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922232066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:57,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155774115] [2021-06-05 06:20:57,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:57,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:57,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 06:20:57,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:20:57,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155774115] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:57,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 06:20:57,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-06-05 06:20:57,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368712116] [2021-06-05 06:20:57,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:57,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:57,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:57,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:57,900 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:57,917 INFO L93 Difference]: Finished difference Result 1344 states and 4969 transitions. [2021-06-05 06:20:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:20:57,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:20:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:57,925 INFO L225 Difference]: With dead ends: 1344 [2021-06-05 06:20:57,925 INFO L226 Difference]: Without dead ends: 1344 [2021-06-05 06:20:57,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:57,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-05 06:20:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 926. [2021-06-05 06:20:57,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.6324324324324326) internal successors, (3360), 925 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3360 transitions. [2021-06-05 06:20:57,954 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3360 transitions. Word has length 27 [2021-06-05 06:20:57,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:57,954 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 3360 transitions. [2021-06-05 06:20:57,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:57,954 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3360 transitions. [2021-06-05 06:20:57,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:20:57,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:57,957 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:58,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:58,181 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:58,181 INFO L82 PathProgramCache]: Analyzing trace with hash 591603758, now seen corresponding path program 1 times [2021-06-05 06:20:58,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:58,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5067801] [2021-06-05 06:20:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:58,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:58,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5067801] [2021-06-05 06:20:58,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5067801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:58,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368794387] [2021-06-05 06:20:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:58,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 06:20:58,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:58,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368794387] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:58,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 06:20:58,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-06-05 06:20:58,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312468285] [2021-06-05 06:20:58,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:58,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:58,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:58,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:58,326 INFO L87 Difference]: Start difference. First operand 926 states and 3360 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:58,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:58,345 INFO L93 Difference]: Finished difference Result 1608 states and 5808 transitions. [2021-06-05 06:20:58,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:20:58,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:20:58,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:58,363 INFO L225 Difference]: With dead ends: 1608 [2021-06-05 06:20:58,363 INFO L226 Difference]: Without dead ends: 1608 [2021-06-05 06:20:58,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:58,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-06-05 06:20:58,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1079. [2021-06-05 06:20:58,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 3.6614100185528757) internal successors, (3947), 1078 states have internal predecessors, (3947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3947 transitions. [2021-06-05 06:20:58,396 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3947 transitions. Word has length 27 [2021-06-05 06:20:58,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:58,396 INFO L482 AbstractCegarLoop]: Abstraction has 1079 states and 3947 transitions. [2021-06-05 06:20:58,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:58,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3947 transitions. [2021-06-05 06:20:58,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:20:58,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:58,399 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:58,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:58,613 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:58,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:58,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1107902640, now seen corresponding path program 1 times [2021-06-05 06:20:58,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:58,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220992888] [2021-06-05 06:20:58,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:58,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:58,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220992888] [2021-06-05 06:20:58,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220992888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:58,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586347523] [2021-06-05 06:20:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:58,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:20:58,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:58,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 06:20:58,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:59,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:59,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:20:59,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 06:20:59,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 06:20:59,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:59,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:59,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:20:59,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-06-05 06:20:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:59,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586347523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:59,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:59,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 06:20:59,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314051524] [2021-06-05 06:20:59,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:20:59,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:59,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:20:59,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:20:59,104 INFO L87 Difference]: Start difference. First operand 1079 states and 3947 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-06-05 06:20:59,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:59,297 INFO L93 Difference]: Finished difference Result 2484 states and 9306 transitions. [2021-06-05 06:20:59,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:20:59,297 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 29 [2021-06-05 06:20:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:59,310 INFO L225 Difference]: With dead ends: 2484 [2021-06-05 06:20:59,310 INFO L226 Difference]: Without dead ends: 2405 [2021-06-05 06:20:59,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 178.5ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:20:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-06-05 06:20:59,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1615. [2021-06-05 06:20:59,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 3.7360594795539033) internal successors, (6030), 1614 states have internal predecessors, (6030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 6030 transitions. [2021-06-05 06:20:59,376 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 6030 transitions. Word has length 29 [2021-06-05 06:20:59,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:59,376 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 6030 transitions. [2021-06-05 06:20:59,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-06-05 06:20:59,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 6030 transitions. [2021-06-05 06:20:59,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:20:59,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:59,381 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:59,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:59,605 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:59,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:59,605 INFO L82 PathProgramCache]: Analyzing trace with hash -769853710, now seen corresponding path program 2 times [2021-06-05 06:20:59,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:59,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755460217] [2021-06-05 06:20:59,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:59,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:59,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755460217] [2021-06-05 06:20:59,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755460217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:59,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976906486] [2021-06-05 06:20:59,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:59,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:20:59,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:59,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:20:59,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:59,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 06:20:59,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:59,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:59,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:20:59,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 06:20:59,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 06:20:59,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:59,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:59,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:20:59,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-06-05 06:20:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:59,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976906486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:59,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:59,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 06:20:59,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135447984] [2021-06-05 06:20:59,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:20:59,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:59,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:20:59,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:20:59,972 INFO L87 Difference]: Start difference. First operand 1615 states and 6030 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:00,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:00,174 INFO L93 Difference]: Finished difference Result 2581 states and 9696 transitions. [2021-06-05 06:21:00,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:21:00,174 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:21:00,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:00,183 INFO L225 Difference]: With dead ends: 2581 [2021-06-05 06:21:00,183 INFO L226 Difference]: Without dead ends: 2502 [2021-06-05 06:21:00,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:21:00,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2021-06-05 06:21:00,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 1741. [2021-06-05 06:21:00,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 3.7379310344827585) internal successors, (6504), 1740 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 6504 transitions. [2021-06-05 06:21:00,230 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 6504 transitions. Word has length 29 [2021-06-05 06:21:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:00,230 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 6504 transitions. [2021-06-05 06:21:00,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:00,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 6504 transitions. [2021-06-05 06:21:00,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:21:00,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:00,236 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:00,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 06:21:00,449 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:00,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:00,449 INFO L82 PathProgramCache]: Analyzing trace with hash 720950344, now seen corresponding path program 3 times [2021-06-05 06:21:00,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:00,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135364389] [2021-06-05 06:21:00,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:00,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:00,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135364389] [2021-06-05 06:21:00,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135364389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:00,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654881613] [2021-06-05 06:21:00,603 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:00,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:21:00,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:00,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:21:00,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:00,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 06:21:00,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:00,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:00,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:00,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-06-05 06:21:00,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 06:21:00,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:00,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:00,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:00,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-06-05 06:21:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:00,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654881613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:00,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:00,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 06:21:00,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699050490] [2021-06-05 06:21:00,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:21:00,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:00,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:21:00,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:21:00,803 INFO L87 Difference]: Start difference. First operand 1741 states and 6504 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2021-06-05 06:21:00,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:00,983 INFO L93 Difference]: Finished difference Result 3043 states and 11434 transitions. [2021-06-05 06:21:00,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:21:00,983 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 29 [2021-06-05 06:21:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:00,993 INFO L225 Difference]: With dead ends: 3043 [2021-06-05 06:21:00,993 INFO L226 Difference]: Without dead ends: 2964 [2021-06-05 06:21:00,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:21:00,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-06-05 06:21:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 1837. [2021-06-05 06:21:01,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.7265795206971677) internal successors, (6842), 1836 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6842 transitions. [2021-06-05 06:21:01,061 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6842 transitions. Word has length 29 [2021-06-05 06:21:01,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:01,061 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 6842 transitions. [2021-06-05 06:21:01,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2021-06-05 06:21:01,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6842 transitions. [2021-06-05 06:21:01,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:21:01,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:01,067 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:01,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:01,290 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:01,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:01,291 INFO L82 PathProgramCache]: Analyzing trace with hash -949623576, now seen corresponding path program 4 times [2021-06-05 06:21:01,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:01,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131961819] [2021-06-05 06:21:01,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:01,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:01,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131961819] [2021-06-05 06:21:01,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131961819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:01,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594651129] [2021-06-05 06:21:01,422 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:01,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:21:01,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:01,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:21:01,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:01,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 06:21:01,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:01,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:01,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:01,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 06:21:01,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 06:21:01,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:01,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:01,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:01,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-06-05 06:21:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:01,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594651129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:01,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:01,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 06:21:01,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293890488] [2021-06-05 06:21:01,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:21:01,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:01,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:21:01,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:21:01,618 INFO L87 Difference]: Start difference. First operand 1837 states and 6842 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-06-05 06:21:01,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:01,887 INFO L93 Difference]: Finished difference Result 3105 states and 11701 transitions. [2021-06-05 06:21:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:21:01,888 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 29 [2021-06-05 06:21:01,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:01,899 INFO L225 Difference]: With dead ends: 3105 [2021-06-05 06:21:01,899 INFO L226 Difference]: Without dead ends: 3026 [2021-06-05 06:21:01,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:21:01,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2021-06-05 06:21:01,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2051. [2021-06-05 06:21:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.7434146341463417) internal successors, (7674), 2050 states have internal predecessors, (7674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:01,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 7674 transitions. [2021-06-05 06:21:01,954 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 7674 transitions. Word has length 29 [2021-06-05 06:21:01,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:01,954 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 7674 transitions. [2021-06-05 06:21:01,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-06-05 06:21:01,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 7674 transitions. [2021-06-05 06:21:01,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:21:01,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:01,960 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:02,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:02,177 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:02,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:02,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1467587370, now seen corresponding path program 5 times [2021-06-05 06:21:02,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:02,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066979905] [2021-06-05 06:21:02,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:02,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:02,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066979905] [2021-06-05 06:21:02,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066979905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:02,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010586073] [2021-06-05 06:21:02,308 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:02,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:21:02,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:02,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:21:02,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:02,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 06:21:02,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:02,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:02,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:02,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 06:21:02,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 06:21:02,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:02,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:02,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:02,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-06-05 06:21:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:02,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010586073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:02,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:02,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 06:21:02,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331501374] [2021-06-05 06:21:02,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:21:02,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:02,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:21:02,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:21:02,502 INFO L87 Difference]: Start difference. First operand 2051 states and 7674 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:02,761 INFO L93 Difference]: Finished difference Result 2933 states and 11023 transitions. [2021-06-05 06:21:02,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:21:02,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:21:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:02,770 INFO L225 Difference]: With dead ends: 2933 [2021-06-05 06:21:02,771 INFO L226 Difference]: Without dead ends: 2854 [2021-06-05 06:21:02,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 190.6ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:21:02,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-06-05 06:21:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 1852. [2021-06-05 06:21:02,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 3.731496488384657) internal successors, (6907), 1851 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6907 transitions. [2021-06-05 06:21:02,819 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6907 transitions. Word has length 29 [2021-06-05 06:21:02,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:02,819 INFO L482 AbstractCegarLoop]: Abstraction has 1852 states and 6907 transitions. [2021-06-05 06:21:02,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:02,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6907 transitions. [2021-06-05 06:21:02,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:21:02,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:02,827 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:03,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 06:21:03,041 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:03,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:03,041 INFO L82 PathProgramCache]: Analyzing trace with hash -55564736, now seen corresponding path program 6 times [2021-06-05 06:21:03,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:03,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356723027] [2021-06-05 06:21:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:03,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:03,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356723027] [2021-06-05 06:21:03,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356723027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:03,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377706722] [2021-06-05 06:21:03,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:03,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:21:03,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:03,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:21:03,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:03,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 06:21:03,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:03,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:03,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:03,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-06-05 06:21:03,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 06:21:03,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:03,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:03,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:03,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-06-05 06:21:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:03,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377706722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:03,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:03,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 06:21:03,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80504388] [2021-06-05 06:21:03,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:21:03,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:03,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:21:03,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:21:03,381 INFO L87 Difference]: Start difference. First operand 1852 states and 6907 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:03,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:03,530 INFO L93 Difference]: Finished difference Result 2807 states and 10501 transitions. [2021-06-05 06:21:03,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:21:03,530 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 29 [2021-06-05 06:21:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:03,539 INFO L225 Difference]: With dead ends: 2807 [2021-06-05 06:21:03,539 INFO L226 Difference]: Without dead ends: 2728 [2021-06-05 06:21:03,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:21:03,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-06-05 06:21:03,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 1892. [2021-06-05 06:21:03,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.7223691168693813) internal successors, (7039), 1891 states have internal predecessors, (7039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:03,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 7039 transitions. [2021-06-05 06:21:03,589 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 7039 transitions. Word has length 29 [2021-06-05 06:21:03,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:03,589 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 7039 transitions. [2021-06-05 06:21:03,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:03,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 7039 transitions. [2021-06-05 06:21:03,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:21:03,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:03,594 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:03,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 06:21:03,811 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:03,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:03,811 INFO L82 PathProgramCache]: Analyzing trace with hash -945078094, now seen corresponding path program 7 times [2021-06-05 06:21:03,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:03,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721224196] [2021-06-05 06:21:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:21:03,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:03,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721224196] [2021-06-05 06:21:03,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721224196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:03,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107125810] [2021-06-05 06:21:03,846 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:03,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:21:03,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:21:03,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107125810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:03,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:03,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 06:21:03,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55580639] [2021-06-05 06:21:03,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:21:03,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:03,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:21:03,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:21:03,954 INFO L87 Difference]: Start difference. First operand 1892 states and 7039 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:04,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:04,023 INFO L93 Difference]: Finished difference Result 3393 states and 12285 transitions. [2021-06-05 06:21:04,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:21:04,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:21:04,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:04,033 INFO L225 Difference]: With dead ends: 3393 [2021-06-05 06:21:04,033 INFO L226 Difference]: Without dead ends: 3242 [2021-06-05 06:21:04,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:21:04,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-06-05 06:21:04,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2725. [2021-06-05 06:21:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 3.752202643171806) internal successors, (10221), 2724 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 10221 transitions. [2021-06-05 06:21:04,099 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 10221 transitions. Word has length 31 [2021-06-05 06:21:04,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:04,099 INFO L482 AbstractCegarLoop]: Abstraction has 2725 states and 10221 transitions. [2021-06-05 06:21:04,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:04,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 10221 transitions. [2021-06-05 06:21:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:21:04,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:04,105 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:04,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 06:21:04,321 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:04,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:04,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1385088466, now seen corresponding path program 8 times [2021-06-05 06:21:04,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:04,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810605718] [2021-06-05 06:21:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:21:04,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:04,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810605718] [2021-06-05 06:21:04,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810605718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:04,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069657878] [2021-06-05 06:21:04,357 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:04,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:21:04,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:04,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:21:04,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:21:04,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069657878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:04,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:04,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 06:21:04,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743773117] [2021-06-05 06:21:04,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:21:04,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:04,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:21:04,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:21:04,487 INFO L87 Difference]: Start difference. First operand 2725 states and 10221 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:04,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:04,570 INFO L93 Difference]: Finished difference Result 5257 states and 19424 transitions. [2021-06-05 06:21:04,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:21:04,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:21:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:04,583 INFO L225 Difference]: With dead ends: 5257 [2021-06-05 06:21:04,584 INFO L226 Difference]: Without dead ends: 5006 [2021-06-05 06:21:04,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:21:04,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-06-05 06:21:04,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4359. [2021-06-05 06:21:04,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 3.8077099586966496) internal successors, (16594), 4358 states have internal predecessors, (16594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 16594 transitions. [2021-06-05 06:21:04,686 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 16594 transitions. Word has length 31 [2021-06-05 06:21:04,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:04,687 INFO L482 AbstractCegarLoop]: Abstraction has 4359 states and 16594 transitions. [2021-06-05 06:21:04,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:04,687 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 16594 transitions. [2021-06-05 06:21:04,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:21:04,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:04,698 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:04,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 06:21:04,909 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:04,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:04,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1789712274, now seen corresponding path program 9 times [2021-06-05 06:21:04,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:04,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429544284] [2021-06-05 06:21:04,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:21:04,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:04,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429544284] [2021-06-05 06:21:04,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429544284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:04,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249813722] [2021-06-05 06:21:04,936 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:04,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:21:04,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:04,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:21:04,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:21:05,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249813722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:05,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:05,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 06:21:05,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065091487] [2021-06-05 06:21:05,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:21:05,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:05,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:21:05,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:21:05,082 INFO L87 Difference]: Start difference. First operand 4359 states and 16594 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) [2021-06-05 06:21:05,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:05,411 INFO L93 Difference]: Finished difference Result 16323 states and 59821 transitions. [2021-06-05 06:21:05,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:21:05,411 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 34 [2021-06-05 06:21:05,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:05,442 INFO L225 Difference]: With dead ends: 16323 [2021-06-05 06:21:05,443 INFO L226 Difference]: Without dead ends: 13965 [2021-06-05 06:21:05,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:21:05,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13965 states. [2021-06-05 06:21:05,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13965 to 7026. [2021-06-05 06:21:05,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7026 states, 7025 states have (on average 3.893523131672598) internal successors, (27352), 7025 states have internal predecessors, (27352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7026 states to 7026 states and 27352 transitions. [2021-06-05 06:21:05,780 INFO L78 Accepts]: Start accepts. Automaton has 7026 states and 27352 transitions. Word has length 34 [2021-06-05 06:21:05,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:05,780 INFO L482 AbstractCegarLoop]: Abstraction has 7026 states and 27352 transitions. [2021-06-05 06:21:05,781 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) [2021-06-05 06:21:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 7026 states and 27352 transitions. [2021-06-05 06:21:05,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:21:05,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:05,802 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:06,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 06:21:06,017 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:06,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:06,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1811384725, now seen corresponding path program 10 times [2021-06-05 06:21:06,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:06,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878748742] [2021-06-05 06:21:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:21:06,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:06,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878748742] [2021-06-05 06:21:06,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878748742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:06,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301558459] [2021-06-05 06:21:06,090 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:06,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:21:06,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:06,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:21:06,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:21:06,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301558459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:06,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:06,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 06:21:06,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300026013] [2021-06-05 06:21:06,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:21:06,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:06,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:21:06,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:21:06,221 INFO L87 Difference]: Start difference. First operand 7026 states and 27352 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:06,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:06,685 INFO L93 Difference]: Finished difference Result 18970 states and 71100 transitions. [2021-06-05 06:21:06,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:21:06,686 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:21:06,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:06,731 INFO L225 Difference]: With dead ends: 18970 [2021-06-05 06:21:06,731 INFO L226 Difference]: Without dead ends: 18531 [2021-06-05 06:21:06,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:21:06,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18531 states. [2021-06-05 06:21:07,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18531 to 10689. [2021-06-05 06:21:07,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 10688 states have (on average 3.994479790419162) internal successors, (42693), 10688 states have internal predecessors, (42693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:07,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 42693 transitions. [2021-06-05 06:21:07,255 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 42693 transitions. Word has length 34 [2021-06-05 06:21:07,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:07,255 INFO L482 AbstractCegarLoop]: Abstraction has 10689 states and 42693 transitions. [2021-06-05 06:21:07,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:07,256 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 42693 transitions. [2021-06-05 06:21:07,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:21:07,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:07,283 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:07,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:07,497 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:07,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:07,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1977044948, now seen corresponding path program 11 times [2021-06-05 06:21:07,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:07,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880998098] [2021-06-05 06:21:07,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:21:07,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:07,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880998098] [2021-06-05 06:21:07,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880998098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:07,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216433852] [2021-06-05 06:21:07,571 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:07,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:21:07,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:07,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:21:07,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:21:07,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216433852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:07,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:07,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 06:21:07,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240665072] [2021-06-05 06:21:07,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:21:07,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:07,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:21:07,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:21:07,716 INFO L87 Difference]: Start difference. First operand 10689 states and 42693 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:08,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:08,108 INFO L93 Difference]: Finished difference Result 18432 states and 70487 transitions. [2021-06-05 06:21:08,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:21:08,108 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:21:08,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:08,155 INFO L225 Difference]: With dead ends: 18432 [2021-06-05 06:21:08,155 INFO L226 Difference]: Without dead ends: 18354 [2021-06-05 06:21:08,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:21:08,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-06-05 06:21:08,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 10639. [2021-06-05 06:21:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10639 states, 10638 states have (on average 3.9989659710471894) internal successors, (42541), 10638 states have internal predecessors, (42541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10639 states to 10639 states and 42541 transitions. [2021-06-05 06:21:08,498 INFO L78 Accepts]: Start accepts. Automaton has 10639 states and 42541 transitions. Word has length 34 [2021-06-05 06:21:08,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:08,499 INFO L482 AbstractCegarLoop]: Abstraction has 10639 states and 42541 transitions. [2021-06-05 06:21:08,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 10639 states and 42541 transitions. [2021-06-05 06:21:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:21:08,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:08,522 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:08,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:08,722 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:08,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:08,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1356082631, now seen corresponding path program 12 times [2021-06-05 06:21:08,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:08,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747467060] [2021-06-05 06:21:08,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:21:08,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:08,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747467060] [2021-06-05 06:21:08,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747467060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:08,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691625277] [2021-06-05 06:21:08,754 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:08,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:21:08,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:08,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:21:08,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:21:08,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691625277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:08,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:08,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 06:21:08,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167974856] [2021-06-05 06:21:08,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:21:08,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:08,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:21:08,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:21:08,903 INFO L87 Difference]: Start difference. First operand 10639 states and 42541 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:09,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:09,299 INFO L93 Difference]: Finished difference Result 20371 states and 77140 transitions. [2021-06-05 06:21:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:21:09,299 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:21:09,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:09,340 INFO L225 Difference]: With dead ends: 20371 [2021-06-05 06:21:09,340 INFO L226 Difference]: Without dead ends: 18706 [2021-06-05 06:21:09,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 177.6ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:21:09,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18706 states. [2021-06-05 06:21:09,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18706 to 13271. [2021-06-05 06:21:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13271 states, 13270 states have (on average 4.00783722682743) internal successors, (53184), 13270 states have internal predecessors, (53184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13271 states to 13271 states and 53184 transitions. [2021-06-05 06:21:09,670 INFO L78 Accepts]: Start accepts. Automaton has 13271 states and 53184 transitions. Word has length 34 [2021-06-05 06:21:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:09,670 INFO L482 AbstractCegarLoop]: Abstraction has 13271 states and 53184 transitions. [2021-06-05 06:21:09,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 13271 states and 53184 transitions. [2021-06-05 06:21:09,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:21:09,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:09,695 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:09,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 06:21:09,897 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:09,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:09,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1475484620, now seen corresponding path program 13 times [2021-06-05 06:21:09,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:09,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111509869] [2021-06-05 06:21:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:21:09,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:09,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111509869] [2021-06-05 06:21:09,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111509869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:09,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559510266] [2021-06-05 06:21:09,937 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:09,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:21:09,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:21:10,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559510266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:10,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:10,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 06:21:10,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165756176] [2021-06-05 06:21:10,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:21:10,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:10,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:21:10,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:21:10,052 INFO L87 Difference]: Start difference. First operand 13271 states and 53184 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) [2021-06-05 06:21:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:10,520 INFO L93 Difference]: Finished difference Result 29290 states and 113267 transitions. [2021-06-05 06:21:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:21:10,520 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 34 [2021-06-05 06:21:10,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:10,721 INFO L225 Difference]: With dead ends: 29290 [2021-06-05 06:21:10,721 INFO L226 Difference]: Without dead ends: 27668 [2021-06-05 06:21:10,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:21:10,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27668 states. [2021-06-05 06:21:11,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27668 to 18232. [2021-06-05 06:21:11,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18232 states, 18231 states have (on average 4.042016345784653) internal successors, (73690), 18231 states have internal predecessors, (73690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18232 states to 18232 states and 73690 transitions. [2021-06-05 06:21:11,191 INFO L78 Accepts]: Start accepts. Automaton has 18232 states and 73690 transitions. Word has length 34 [2021-06-05 06:21:11,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:11,191 INFO L482 AbstractCegarLoop]: Abstraction has 18232 states and 73690 transitions. [2021-06-05 06:21:11,192 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) [2021-06-05 06:21:11,192 INFO L276 IsEmpty]: Start isEmpty. Operand 18232 states and 73690 transitions. [2021-06-05 06:21:11,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:21:11,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:11,223 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:11,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:11,423 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:11,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:11,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1888062838, now seen corresponding path program 14 times [2021-06-05 06:21:11,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:11,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871768427] [2021-06-05 06:21:11,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:21:11,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:11,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871768427] [2021-06-05 06:21:11,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871768427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:11,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413113502] [2021-06-05 06:21:11,471 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:11,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:21:11,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:11,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:21:11,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:21:11,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413113502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:11,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:11,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 06:21:11,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128792275] [2021-06-05 06:21:11,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:21:11,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:11,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:21:11,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:21:11,590 INFO L87 Difference]: Start difference. First operand 18232 states and 73690 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:12,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:12,028 INFO L93 Difference]: Finished difference Result 27112 states and 106138 transitions. [2021-06-05 06:21:12,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:21:12,028 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:21:12,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:12,098 INFO L225 Difference]: With dead ends: 27112 [2021-06-05 06:21:12,098 INFO L226 Difference]: Without dead ends: 26976 [2021-06-05 06:21:12,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:21:12,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26976 states. [2021-06-05 06:21:12,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26976 to 18044. [2021-06-05 06:21:12,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18044 states, 18043 states have (on average 4.0432300615197025) internal successors, (72952), 18043 states have internal predecessors, (72952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18044 states to 18044 states and 72952 transitions. [2021-06-05 06:21:12,689 INFO L78 Accepts]: Start accepts. Automaton has 18044 states and 72952 transitions. Word has length 34 [2021-06-05 06:21:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:12,689 INFO L482 AbstractCegarLoop]: Abstraction has 18044 states and 72952 transitions. [2021-06-05 06:21:12,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 18044 states and 72952 transitions. [2021-06-05 06:21:12,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:21:12,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:12,733 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:12,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 06:21:12,939 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:12,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:12,939 INFO L82 PathProgramCache]: Analyzing trace with hash -2054889942, now seen corresponding path program 15 times [2021-06-05 06:21:12,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:12,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223010911] [2021-06-05 06:21:12,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:21:12,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:12,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223010911] [2021-06-05 06:21:12,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223010911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:12,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761103873] [2021-06-05 06:21:12,986 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:13,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:21:13,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:13,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:21:13,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:21:13,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761103873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:13,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:13,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 06:21:13,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553898603] [2021-06-05 06:21:13,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:21:13,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:13,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:21:13,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:21:13,266 INFO L87 Difference]: Start difference. First operand 18044 states and 72952 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:13,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:13,618 INFO L93 Difference]: Finished difference Result 30228 states and 119473 transitions. [2021-06-05 06:21:13,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:21:13,618 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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 34 [2021-06-05 06:21:13,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:13,693 INFO L225 Difference]: With dead ends: 30228 [2021-06-05 06:21:13,693 INFO L226 Difference]: Without dead ends: 30070 [2021-06-05 06:21:13,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:21:13,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30070 states. [2021-06-05 06:21:14,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30070 to 20840. [2021-06-05 06:21:14,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20840 states, 20839 states have (on average 4.074667690388214) internal successors, (84912), 20839 states have internal predecessors, (84912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:14,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20840 states to 20840 states and 84912 transitions. [2021-06-05 06:21:14,304 INFO L78 Accepts]: Start accepts. Automaton has 20840 states and 84912 transitions. Word has length 34 [2021-06-05 06:21:14,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:14,304 INFO L482 AbstractCegarLoop]: Abstraction has 20840 states and 84912 transitions. [2021-06-05 06:21:14,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:14,304 INFO L276 IsEmpty]: Start isEmpty. Operand 20840 states and 84912 transitions. [2021-06-05 06:21:14,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:21:14,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:14,349 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:14,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 06:21:14,550 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:14,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:14,550 INFO L82 PathProgramCache]: Analyzing trace with hash 2024685389, now seen corresponding path program 16 times [2021-06-05 06:21:14,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:14,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277159519] [2021-06-05 06:21:14,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:21:14,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:14,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277159519] [2021-06-05 06:21:14,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277159519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:14,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459571620] [2021-06-05 06:21:14,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:14,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:21:14,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:14,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:21:14,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:21:14,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459571620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:14,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:14,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 06:21:14,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103899342] [2021-06-05 06:21:14,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:21:14,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:14,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:21:14,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:21:14,788 INFO L87 Difference]: Start difference. First operand 20840 states and 84912 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:15,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:15,123 INFO L93 Difference]: Finished difference Result 28338 states and 112394 transitions. [2021-06-05 06:21:15,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:21:15,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:21:15,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:15,194 INFO L225 Difference]: With dead ends: 28338 [2021-06-05 06:21:15,194 INFO L226 Difference]: Without dead ends: 28230 [2021-06-05 06:21:15,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:21:15,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28230 states. [2021-06-05 06:21:15,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28230 to 21970. [2021-06-05 06:21:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21970 states, 21969 states have (on average 4.097774136282944) internal successors, (90024), 21969 states have internal predecessors, (90024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:15,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21970 states to 21970 states and 90024 transitions. [2021-06-05 06:21:15,812 INFO L78 Accepts]: Start accepts. Automaton has 21970 states and 90024 transitions. Word has length 34 [2021-06-05 06:21:15,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:15,812 INFO L482 AbstractCegarLoop]: Abstraction has 21970 states and 90024 transitions. [2021-06-05 06:21:15,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:15,812 INFO L276 IsEmpty]: Start isEmpty. Operand 21970 states and 90024 transitions. [2021-06-05 06:21:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:21:15,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:15,852 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:16,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 06:21:16,053 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:16,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:16,053 INFO L82 PathProgramCache]: Analyzing trace with hash 31444491, now seen corresponding path program 17 times [2021-06-05 06:21:16,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:16,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554593940] [2021-06-05 06:21:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 06:21:16,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:16,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554593940] [2021-06-05 06:21:16,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554593940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:16,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611599484] [2021-06-05 06:21:16,084 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:16,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:21:16,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:16,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:21:16,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 06:21:16,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611599484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:16,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:16,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 06:21:16,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722961082] [2021-06-05 06:21:16,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:21:16,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:16,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:21:16,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:21:16,183 INFO L87 Difference]: Start difference. First operand 21970 states and 90024 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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) [2021-06-05 06:21:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:16,363 INFO L93 Difference]: Finished difference Result 29898 states and 123092 transitions. [2021-06-05 06:21:16,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:21:16,363 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 37 [2021-06-05 06:21:16,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:16,641 INFO L225 Difference]: With dead ends: 29898 [2021-06-05 06:21:16,641 INFO L226 Difference]: Without dead ends: 29898 [2021-06-05 06:21:16,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:21:16,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29898 states. [2021-06-05 06:21:17,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29898 to 24224. [2021-06-05 06:21:17,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24224 states, 24223 states have (on average 4.093588737976304) internal successors, (99159), 24223 states have internal predecessors, (99159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:17,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24224 states to 24224 states and 99159 transitions. [2021-06-05 06:21:17,117 INFO L78 Accepts]: Start accepts. Automaton has 24224 states and 99159 transitions. Word has length 37 [2021-06-05 06:21:17,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:17,118 INFO L482 AbstractCegarLoop]: Abstraction has 24224 states and 99159 transitions. [2021-06-05 06:21:17,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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) [2021-06-05 06:21:17,118 INFO L276 IsEmpty]: Start isEmpty. Operand 24224 states and 99159 transitions. [2021-06-05 06:21:17,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:21:17,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:17,160 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:17,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 06:21:17,361 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:17,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:17,361 INFO L82 PathProgramCache]: Analyzing trace with hash -906169461, now seen corresponding path program 18 times [2021-06-05 06:21:17,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:17,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389372724] [2021-06-05 06:21:17,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 06:21:17,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:17,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389372724] [2021-06-05 06:21:17,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389372724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:17,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223753338] [2021-06-05 06:21:17,381 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:17,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:21:17,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:17,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:21:17,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 06:21:17,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223753338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:17,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:17,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 06:21:17,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321538984] [2021-06-05 06:21:17,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:21:17,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:17,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:21:17,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:21:17,721 INFO L87 Difference]: Start difference. First operand 24224 states and 99159 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:17,945 INFO L93 Difference]: Finished difference Result 37062 states and 153499 transitions. [2021-06-05 06:21:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:21:17,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 06:21:17,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:18,053 INFO L225 Difference]: With dead ends: 37062 [2021-06-05 06:21:18,054 INFO L226 Difference]: Without dead ends: 37062 [2021-06-05 06:21:18,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:21:18,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37062 states. [2021-06-05 06:21:18,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37062 to 34305. [2021-06-05 06:21:18,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34305 states, 34304 states have (on average 4.138496968283582) internal successors, (141967), 34304 states have internal predecessors, (141967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:18,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34305 states to 34305 states and 141967 transitions. [2021-06-05 06:21:18,879 INFO L78 Accepts]: Start accepts. Automaton has 34305 states and 141967 transitions. Word has length 37 [2021-06-05 06:21:18,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:18,880 INFO L482 AbstractCegarLoop]: Abstraction has 34305 states and 141967 transitions. [2021-06-05 06:21:18,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:18,880 INFO L276 IsEmpty]: Start isEmpty. Operand 34305 states and 141967 transitions. [2021-06-05 06:21:18,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:18,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:18,950 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:19,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 06:21:19,151 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:19,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:19,151 INFO L82 PathProgramCache]: Analyzing trace with hash -774251319, now seen corresponding path program 19 times [2021-06-05 06:21:19,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:19,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986721593] [2021-06-05 06:21:19,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:19,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:19,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986721593] [2021-06-05 06:21:19,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986721593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:19,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519554466] [2021-06-05 06:21:19,541 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:19,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:21:19,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:19,937 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-06-05 06:21:20,076 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:20,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:21:20,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:20,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:20,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:20,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 06:21:20,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:21:20,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:20,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:20,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:20,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 06:21:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:20,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519554466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:20,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:20,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 06:21:20,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309003168] [2021-06-05 06:21:20,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:21:20,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:20,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:21:20,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:21:20,214 INFO L87 Difference]: Start difference. First operand 34305 states and 141967 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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) [2021-06-05 06:21:22,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:22,235 INFO L93 Difference]: Finished difference Result 68330 states and 281299 transitions. [2021-06-05 06:21:22,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:21:22,235 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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 39 [2021-06-05 06:21:22,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:22,449 INFO L225 Difference]: With dead ends: 68330 [2021-06-05 06:21:22,449 INFO L226 Difference]: Without dead ends: 68275 [2021-06-05 06:21:22,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1184.1ms TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:21:22,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68275 states. [2021-06-05 06:21:23,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68275 to 35332. [2021-06-05 06:21:23,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35332 states, 35331 states have (on average 4.143075486117008) internal successors, (146379), 35331 states have internal predecessors, (146379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:23,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35332 states to 35332 states and 146379 transitions. [2021-06-05 06:21:23,498 INFO L78 Accepts]: Start accepts. Automaton has 35332 states and 146379 transitions. Word has length 39 [2021-06-05 06:21:23,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:23,498 INFO L482 AbstractCegarLoop]: Abstraction has 35332 states and 146379 transitions. [2021-06-05 06:21:23,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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) [2021-06-05 06:21:23,498 INFO L276 IsEmpty]: Start isEmpty. Operand 35332 states and 146379 transitions. [2021-06-05 06:21:23,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:23,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:23,571 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:23,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:23,772 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:23,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:23,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1160268155, now seen corresponding path program 20 times [2021-06-05 06:21:23,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:23,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147335154] [2021-06-05 06:21:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:24,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:24,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147335154] [2021-06-05 06:21:24,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147335154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:24,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324970488] [2021-06-05 06:21:24,153 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:24,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:21:24,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:24,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:21:24,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:24,404 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:24,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:21:24,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:24,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:24,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:24,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 06:21:24,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:21:24,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:24,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:24,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:24,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:21:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:24,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324970488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:24,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:24,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:21:24,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100016517] [2021-06-05 06:21:24,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:21:24,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:24,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:21:24,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:21:24,606 INFO L87 Difference]: Start difference. First operand 35332 states and 146379 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:21:24,905 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-06-05 06:21:26,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:26,448 INFO L93 Difference]: Finished difference Result 63146 states and 258446 transitions. [2021-06-05 06:21:26,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:21:26,449 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:21:26,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:26,901 INFO L225 Difference]: With dead ends: 63146 [2021-06-05 06:21:26,901 INFO L226 Difference]: Without dead ends: 62930 [2021-06-05 06:21:26,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1505.7ms TimeCoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:21:26,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62930 states. [2021-06-05 06:21:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62930 to 35439. [2021-06-05 06:21:28,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35439 states, 35438 states have (on average 4.145691066087251) internal successors, (146915), 35438 states have internal predecessors, (146915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:28,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35439 states to 35439 states and 146915 transitions. [2021-06-05 06:21:28,137 INFO L78 Accepts]: Start accepts. Automaton has 35439 states and 146915 transitions. Word has length 39 [2021-06-05 06:21:28,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:28,137 INFO L482 AbstractCegarLoop]: Abstraction has 35439 states and 146915 transitions. [2021-06-05 06:21:28,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:21:28,137 INFO L276 IsEmpty]: Start isEmpty. Operand 35439 states and 146915 transitions. [2021-06-05 06:21:28,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:28,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:28,204 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:28,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 06:21:28,405 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:28,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:28,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1763377011, now seen corresponding path program 21 times [2021-06-05 06:21:28,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:28,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138960639] [2021-06-05 06:21:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:28,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:28,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138960639] [2021-06-05 06:21:28,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138960639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:28,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515118540] [2021-06-05 06:21:28,840 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:28,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:21:28,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:28,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:21:28,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:29,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:29,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-06-05 06:21:29,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:29,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:29,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:29,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:45 [2021-06-05 06:21:29,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:21:29,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:29,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:29,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:29,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:9 [2021-06-05 06:21:29,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:29,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:21:29,378 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:29,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:29,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:29,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:21:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:29,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515118540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:29,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:29,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:21:29,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125787821] [2021-06-05 06:21:29,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:21:29,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:29,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:21:29,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:21:29,462 INFO L87 Difference]: Start difference. First operand 35439 states and 146915 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:21:32,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:32,018 INFO L93 Difference]: Finished difference Result 64599 states and 264126 transitions. [2021-06-05 06:21:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:21:32,018 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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 39 [2021-06-05 06:21:32,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:32,430 INFO L225 Difference]: With dead ends: 64599 [2021-06-05 06:21:32,430 INFO L226 Difference]: Without dead ends: 64378 [2021-06-05 06:21:32,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 1889.9ms TimeCoverageRelationStatistics Valid=577, Invalid=2615, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:21:32,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64378 states. [2021-06-05 06:21:33,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64378 to 35778. [2021-06-05 06:21:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35778 states, 35777 states have (on average 4.14014590379294) internal successors, (148122), 35777 states have internal predecessors, (148122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:33,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35778 states to 35778 states and 148122 transitions. [2021-06-05 06:21:33,529 INFO L78 Accepts]: Start accepts. Automaton has 35778 states and 148122 transitions. Word has length 39 [2021-06-05 06:21:33,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:33,529 INFO L482 AbstractCegarLoop]: Abstraction has 35778 states and 148122 transitions. [2021-06-05 06:21:33,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:21:33,529 INFO L276 IsEmpty]: Start isEmpty. Operand 35778 states and 148122 transitions. [2021-06-05 06:21:33,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:33,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:33,606 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:33,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:33,807 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:33,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:33,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1572423621, now seen corresponding path program 22 times [2021-06-05 06:21:33,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:33,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065466151] [2021-06-05 06:21:33,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:34,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:34,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065466151] [2021-06-05 06:21:34,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065466151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:34,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814396720] [2021-06-05 06:21:34,266 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:34,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:21:34,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:34,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:21:34,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:34,485 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:34,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:21:34,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:34,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:34,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:34,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 06:21:34,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:21:34,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:34,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:34,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:34,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:21:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:34,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814396720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:34,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:34,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:21:34,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093662733] [2021-06-05 06:21:34,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:21:34,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:34,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:21:34,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:21:34,671 INFO L87 Difference]: Start difference. First operand 35778 states and 148122 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:21:36,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:36,769 INFO L93 Difference]: Finished difference Result 77057 states and 313105 transitions. [2021-06-05 06:21:36,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:21:36,770 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:21:36,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:37,009 INFO L225 Difference]: With dead ends: 77057 [2021-06-05 06:21:37,010 INFO L226 Difference]: Without dead ends: 76873 [2021-06-05 06:21:37,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1519.6ms TimeCoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:21:37,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76873 states. [2021-06-05 06:21:38,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76873 to 35467. [2021-06-05 06:21:38,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35467 states, 35466 states have (on average 4.145068516325495) internal successors, (147009), 35466 states have internal predecessors, (147009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35467 states to 35467 states and 147009 transitions. [2021-06-05 06:21:38,244 INFO L78 Accepts]: Start accepts. Automaton has 35467 states and 147009 transitions. Word has length 39 [2021-06-05 06:21:38,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:38,244 INFO L482 AbstractCegarLoop]: Abstraction has 35467 states and 147009 transitions. [2021-06-05 06:21:38,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:21:38,245 INFO L276 IsEmpty]: Start isEmpty. Operand 35467 states and 147009 transitions. [2021-06-05 06:21:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:38,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:38,312 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:38,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 06:21:38,517 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:38,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:38,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1303937869, now seen corresponding path program 23 times [2021-06-05 06:21:38,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:38,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910622771] [2021-06-05 06:21:38,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:38,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:38,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910622771] [2021-06-05 06:21:38,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910622771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:38,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837558978] [2021-06-05 06:21:38,839 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:38,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:21:38,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:38,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 06:21:38,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:39,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:39,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:39,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:39,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:39,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-06-05 06:21:39,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:21:39,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:39,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:21:39,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:47 [2021-06-05 06:21:39,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:39,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:39,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:39,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:39,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:39,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 30 [2021-06-05 06:21:39,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:21:39,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:39,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:39,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:37 [2021-06-05 06:21:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:39,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837558978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:39,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:39,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:21:39,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38367482] [2021-06-05 06:21:39,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:21:39,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:39,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:21:39,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:21:39,919 INFO L87 Difference]: Start difference. First operand 35467 states and 147009 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:43,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:43,017 INFO L93 Difference]: Finished difference Result 62904 states and 256527 transitions. [2021-06-05 06:21:43,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:21:43,018 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:43,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:43,226 INFO L225 Difference]: With dead ends: 62904 [2021-06-05 06:21:43,226 INFO L226 Difference]: Without dead ends: 62810 [2021-06-05 06:21:43,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 2326.1ms TimeCoverageRelationStatistics Valid=485, Invalid=3055, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:21:43,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62810 states. [2021-06-05 06:21:44,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62810 to 36170. [2021-06-05 06:21:44,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36170 states, 36169 states have (on average 4.143631286460781) internal successors, (149871), 36169 states have internal predecessors, (149871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:44,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36170 states to 36170 states and 149871 transitions. [2021-06-05 06:21:44,285 INFO L78 Accepts]: Start accepts. Automaton has 36170 states and 149871 transitions. Word has length 39 [2021-06-05 06:21:44,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:44,285 INFO L482 AbstractCegarLoop]: Abstraction has 36170 states and 149871 transitions. [2021-06-05 06:21:44,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:44,285 INFO L276 IsEmpty]: Start isEmpty. Operand 36170 states and 149871 transitions. [2021-06-05 06:21:44,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:44,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:44,354 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:44,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 06:21:44,557 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:44,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:44,557 INFO L82 PathProgramCache]: Analyzing trace with hash 495020509, now seen corresponding path program 24 times [2021-06-05 06:21:44,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:44,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536977219] [2021-06-05 06:21:44,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:44,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:44,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536977219] [2021-06-05 06:21:44,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536977219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:44,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366144572] [2021-06-05 06:21:44,890 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:44,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:21:44,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:44,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:21:44,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:45,116 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:45,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:21:45,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:45,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:45,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:45,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 06:21:45,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:21:45,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:45,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:45,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:45,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 06:21:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:45,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366144572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:45,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:45,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:21:45,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075176304] [2021-06-05 06:21:45,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:21:45,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:45,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:21:45,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:21:45,237 INFO L87 Difference]: Start difference. First operand 36170 states and 149871 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:21:47,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:47,041 INFO L93 Difference]: Finished difference Result 69300 states and 285186 transitions. [2021-06-05 06:21:47,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:21:47,041 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:21:47,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:47,260 INFO L225 Difference]: With dead ends: 69300 [2021-06-05 06:21:47,261 INFO L226 Difference]: Without dead ends: 69245 [2021-06-05 06:21:47,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 943.9ms TimeCoverageRelationStatistics Valid=301, Invalid=1339, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:21:47,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69245 states. [2021-06-05 06:21:48,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69245 to 35741. [2021-06-05 06:21:48,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35741 states, 35740 states have (on average 4.143956351426972) internal successors, (148105), 35740 states have internal predecessors, (148105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35741 states to 35741 states and 148105 transitions. [2021-06-05 06:21:48,439 INFO L78 Accepts]: Start accepts. Automaton has 35741 states and 148105 transitions. Word has length 39 [2021-06-05 06:21:48,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:48,439 INFO L482 AbstractCegarLoop]: Abstraction has 35741 states and 148105 transitions. [2021-06-05 06:21:48,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:21:48,439 INFO L276 IsEmpty]: Start isEmpty. Operand 35741 states and 148105 transitions. [2021-06-05 06:21:48,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:48,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:48,814 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:49,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 06:21:49,029 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:49,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:49,029 INFO L82 PathProgramCache]: Analyzing trace with hash 630581605, now seen corresponding path program 25 times [2021-06-05 06:21:49,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:49,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688357640] [2021-06-05 06:21:49,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:49,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:49,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688357640] [2021-06-05 06:21:49,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688357640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:49,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501300319] [2021-06-05 06:21:49,375 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:49,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:21:49,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:49,635 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:49,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:21:49,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:49,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:49,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:49,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 06:21:49,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:21:49,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:49,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:49,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:49,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:21:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:49,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501300319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:49,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:49,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:21:49,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624565352] [2021-06-05 06:21:49,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:21:49,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:49,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:21:49,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:21:49,777 INFO L87 Difference]: Start difference. First operand 35741 states and 148105 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:21:51,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:51,869 INFO L93 Difference]: Finished difference Result 63431 states and 259711 transitions. [2021-06-05 06:21:51,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:21:51,869 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:21:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:52,073 INFO L225 Difference]: With dead ends: 63431 [2021-06-05 06:21:52,073 INFO L226 Difference]: Without dead ends: 63215 [2021-06-05 06:21:52,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1168.1ms TimeCoverageRelationStatistics Valid=355, Invalid=1715, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:21:52,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63215 states. [2021-06-05 06:21:52,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63215 to 35591. [2021-06-05 06:21:53,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35591 states, 35590 states have (on average 4.1449002528800225) internal successors, (147517), 35590 states have internal predecessors, (147517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35591 states to 35591 states and 147517 transitions. [2021-06-05 06:21:53,153 INFO L78 Accepts]: Start accepts. Automaton has 35591 states and 147517 transitions. Word has length 39 [2021-06-05 06:21:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:53,153 INFO L482 AbstractCegarLoop]: Abstraction has 35591 states and 147517 transitions. [2021-06-05 06:21:53,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:21:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 35591 states and 147517 transitions. [2021-06-05 06:21:53,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:53,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:53,223 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:53,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:53,429 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:53,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:53,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1833798575, now seen corresponding path program 26 times [2021-06-05 06:21:53,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:53,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058857079] [2021-06-05 06:21:53,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:53,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:53,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058857079] [2021-06-05 06:21:53,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058857079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:53,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996685658] [2021-06-05 06:21:53,770 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:53,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:21:53,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:53,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:21:53,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:54,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:21:54,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:54,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:54,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:54,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-05 06:21:54,081 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:54,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:21:54,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:54,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:54,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:54,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-06-05 06:21:54,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:54,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:21:54,167 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:54,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:54,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:54,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:21:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:54,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996685658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:54,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:54,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:21:54,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387453233] [2021-06-05 06:21:54,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:21:54,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:54,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:21:54,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:21:54,222 INFO L87 Difference]: Start difference. First operand 35591 states and 147517 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:56,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:56,182 INFO L93 Difference]: Finished difference Result 81055 states and 333972 transitions. [2021-06-05 06:21:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:21:56,182 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:56,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:56,440 INFO L225 Difference]: With dead ends: 81055 [2021-06-05 06:21:56,441 INFO L226 Difference]: Without dead ends: 81000 [2021-06-05 06:21:56,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1198.4ms TimeCoverageRelationStatistics Valid=402, Invalid=2148, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:21:56,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81000 states. [2021-06-05 06:21:57,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81000 to 36137. [2021-06-05 06:21:57,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36137 states, 36136 states have (on average 4.146695815806951) internal successors, (149845), 36136 states have internal predecessors, (149845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:57,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36137 states to 36137 states and 149845 transitions. [2021-06-05 06:21:57,719 INFO L78 Accepts]: Start accepts. Automaton has 36137 states and 149845 transitions. Word has length 39 [2021-06-05 06:21:57,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:57,719 INFO L482 AbstractCegarLoop]: Abstraction has 36137 states and 149845 transitions. [2021-06-05 06:21:57,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:57,719 INFO L276 IsEmpty]: Start isEmpty. Operand 36137 states and 149845 transitions. [2021-06-05 06:21:57,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:57,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:57,789 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:57,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 06:21:57,990 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:57,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:57,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1196210545, now seen corresponding path program 27 times [2021-06-05 06:21:57,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:57,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113343875] [2021-06-05 06:21:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:58,605 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 06:21:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:58,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:58,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113343875] [2021-06-05 06:21:58,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113343875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:58,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843739642] [2021-06-05 06:21:58,677 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:58,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:21:58,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:58,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 06:21:58,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:59,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:59,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:21:59,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:59,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:59,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:59,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:71 [2021-06-05 06:21:59,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:59,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:59,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:59,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-06-05 06:21:59,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:59,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:59,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-06-05 06:21:59,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:59,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:59,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 06:21:59,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:59,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:59,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:21:59,356 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:150, output treesize:51 [2021-06-05 06:21:59,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:59,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:21:59,490 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:59,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:59,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:59,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:21:59,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:59,551 INFO L628 ElimStorePlain]: treesize reduction 10, result has 78.3 percent of original size [2021-06-05 06:21:59,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:59,569 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:37 [2021-06-05 06:21:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:59,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843739642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:59,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:59,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:21:59,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033164181] [2021-06-05 06:21:59,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:21:59,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:59,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:21:59,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:21:59,647 INFO L87 Difference]: Start difference. First operand 36137 states and 149845 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:01,649 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-06-05 06:22:03,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:03,104 INFO L93 Difference]: Finished difference Result 83615 states and 341709 transitions. [2021-06-05 06:22:03,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:22:03,105 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:03,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:03,371 INFO L225 Difference]: With dead ends: 83615 [2021-06-05 06:22:03,371 INFO L226 Difference]: Without dead ends: 83521 [2021-06-05 06:22:03,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 2943.0ms TimeCoverageRelationStatistics Valid=589, Invalid=4103, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:22:03,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83521 states. [2021-06-05 06:22:04,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83521 to 37060. [2021-06-05 06:22:04,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37060 states, 37059 states have (on average 4.140397744137727) internal successors, (153439), 37059 states have internal predecessors, (153439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:04,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37060 states to 37060 states and 153439 transitions. [2021-06-05 06:22:04,638 INFO L78 Accepts]: Start accepts. Automaton has 37060 states and 153439 transitions. Word has length 39 [2021-06-05 06:22:04,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:04,638 INFO L482 AbstractCegarLoop]: Abstraction has 37060 states and 153439 transitions. [2021-06-05 06:22:04,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:04,639 INFO L276 IsEmpty]: Start isEmpty. Operand 37060 states and 153439 transitions. [2021-06-05 06:22:04,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:04,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:04,714 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:04,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:04,914 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:04,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:04,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1679763727, now seen corresponding path program 28 times [2021-06-05 06:22:04,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:04,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096570691] [2021-06-05 06:22:04,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:05,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:05,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096570691] [2021-06-05 06:22:05,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096570691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:05,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649033863] [2021-06-05 06:22:05,474 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:05,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:22:05,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:05,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:22:05,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:05,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:22:05,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:05,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:05,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:05,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:22:05,830 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:05,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:22:05,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:05,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:05,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:05,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:22:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:05,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649033863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:05,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:05,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:22:05,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506122298] [2021-06-05 06:22:05,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:22:05,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:05,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:22:05,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:22:05,884 INFO L87 Difference]: Start difference. First operand 37060 states and 153439 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:07,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:07,663 INFO L93 Difference]: Finished difference Result 83732 states and 344958 transitions. [2021-06-05 06:22:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:22:07,663 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:07,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:07,928 INFO L225 Difference]: With dead ends: 83732 [2021-06-05 06:22:07,929 INFO L226 Difference]: Without dead ends: 83677 [2021-06-05 06:22:07,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 918.5ms TimeCoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:22:08,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83677 states. [2021-06-05 06:22:09,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83677 to 37730. [2021-06-05 06:22:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37730 states, 37729 states have (on average 4.145537915131596) internal successors, (156407), 37729 states have internal predecessors, (156407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:09,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37730 states to 37730 states and 156407 transitions. [2021-06-05 06:22:09,237 INFO L78 Accepts]: Start accepts. Automaton has 37730 states and 156407 transitions. Word has length 39 [2021-06-05 06:22:09,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:09,238 INFO L482 AbstractCegarLoop]: Abstraction has 37730 states and 156407 transitions. [2021-06-05 06:22:09,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:09,238 INFO L276 IsEmpty]: Start isEmpty. Operand 37730 states and 156407 transitions. [2021-06-05 06:22:09,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:09,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:09,319 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:09,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 06:22:09,523 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:09,523 INFO L82 PathProgramCache]: Analyzing trace with hash -702447437, now seen corresponding path program 29 times [2021-06-05 06:22:09,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:09,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060137973] [2021-06-05 06:22:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:09,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:09,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060137973] [2021-06-05 06:22:09,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060137973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:09,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576395075] [2021-06-05 06:22:09,884 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:09,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:22:09,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:09,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:22:09,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:10,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:10,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:22:10,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:10,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:10,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:10,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:95 [2021-06-05 06:22:10,538 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_4], 6=[q1, v_prenex_2]} [2021-06-05 06:22:10,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:10,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:10,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 38 [2021-06-05 06:22:10,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:10,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:10,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:10,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:10,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:10,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:10,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:22:10,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:22:10,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:10,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:10,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:10,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:10,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:10,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2021-06-05 06:22:10,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 06:22:10,736 INFO L628 ElimStorePlain]: treesize reduction 7, result has 90.8 percent of original size [2021-06-05 06:22:10,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2021-06-05 06:22:10,740 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:145, output treesize:64 [2021-06-05 06:22:10,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:10,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:22:10,857 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:10,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:10,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:10,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:22:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:10,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576395075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:10,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:10,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:22:10,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507419367] [2021-06-05 06:22:10,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:22:10,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:10,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:22:10,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:22:10,931 INFO L87 Difference]: Start difference. First operand 37730 states and 156407 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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) [2021-06-05 06:22:11,356 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-06-05 06:22:11,911 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-05 06:22:13,387 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2021-06-05 06:22:14,478 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 06:22:15,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:15,381 INFO L93 Difference]: Finished difference Result 67775 states and 276822 transitions. [2021-06-05 06:22:15,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:22:15,383 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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 39 [2021-06-05 06:22:15,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:15,583 INFO L225 Difference]: With dead ends: 67775 [2021-06-05 06:22:15,583 INFO L226 Difference]: Without dead ends: 67665 [2021-06-05 06:22:15,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 3654.4ms TimeCoverageRelationStatistics Valid=822, Invalid=4580, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 06:22:15,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67665 states. [2021-06-05 06:22:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67665 to 38001. [2021-06-05 06:22:16,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38001 states, 38000 states have (on average 4.144736842105263) internal successors, (157500), 38000 states have internal predecessors, (157500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38001 states to 38001 states and 157500 transitions. [2021-06-05 06:22:16,652 INFO L78 Accepts]: Start accepts. Automaton has 38001 states and 157500 transitions. Word has length 39 [2021-06-05 06:22:16,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:16,652 INFO L482 AbstractCegarLoop]: Abstraction has 38001 states and 157500 transitions. [2021-06-05 06:22:16,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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) [2021-06-05 06:22:16,652 INFO L276 IsEmpty]: Start isEmpty. Operand 38001 states and 157500 transitions. [2021-06-05 06:22:16,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:16,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:16,727 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:16,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 06:22:16,928 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:16,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1178577663, now seen corresponding path program 30 times [2021-06-05 06:22:16,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:16,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297659512] [2021-06-05 06:22:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:17,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:17,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297659512] [2021-06-05 06:22:17,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297659512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:17,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642612346] [2021-06-05 06:22:17,283 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:17,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:22:17,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:17,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:22:17,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:17,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:22:17,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:17,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:17,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:17,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-05 06:22:17,597 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:17,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 06:22:17,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:17,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:17,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:17,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:15 [2021-06-05 06:22:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:17,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642612346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:17,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:17,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:22:17,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546671980] [2021-06-05 06:22:17,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:22:17,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:17,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:22:17,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:22:17,669 INFO L87 Difference]: Start difference. First operand 38001 states and 157500 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2021-06-05 06:22:18,220 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-06-05 06:22:19,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:19,753 INFO L93 Difference]: Finished difference Result 84439 states and 343715 transitions. [2021-06-05 06:22:19,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:22:19,753 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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 39 [2021-06-05 06:22:19,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:20,003 INFO L225 Difference]: With dead ends: 84439 [2021-06-05 06:22:20,003 INFO L226 Difference]: Without dead ends: 84329 [2021-06-05 06:22:20,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1403.5ms TimeCoverageRelationStatistics Valid=460, Invalid=1990, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:22:20,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84329 states. [2021-06-05 06:22:21,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84329 to 37850. [2021-06-05 06:22:21,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37850 states, 37849 states have (on average 4.145604903696267) internal successors, (156907), 37849 states have internal predecessors, (156907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:21,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37850 states to 37850 states and 156907 transitions. [2021-06-05 06:22:21,654 INFO L78 Accepts]: Start accepts. Automaton has 37850 states and 156907 transitions. Word has length 39 [2021-06-05 06:22:21,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:21,654 INFO L482 AbstractCegarLoop]: Abstraction has 37850 states and 156907 transitions. [2021-06-05 06:22:21,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2021-06-05 06:22:21,654 INFO L276 IsEmpty]: Start isEmpty. Operand 37850 states and 156907 transitions. [2021-06-05 06:22:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:21,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:21,729 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:21,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:21,930 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:21,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:21,930 INFO L82 PathProgramCache]: Analyzing trace with hash -202749415, now seen corresponding path program 31 times [2021-06-05 06:22:21,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:21,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086332218] [2021-06-05 06:22:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:22,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:22,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086332218] [2021-06-05 06:22:22,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086332218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:22,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145094278] [2021-06-05 06:22:22,340 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:22,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:22:22,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:22,602 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:22,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:22:22,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:22,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:22,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:22,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 06:22:22,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:22:22,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:22,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:22,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:22,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:22:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:22,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145094278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:22,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:22,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:22:22,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807428651] [2021-06-05 06:22:22,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:22:22,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:22,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:22:22,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:22:22,691 INFO L87 Difference]: Start difference. First operand 37850 states and 156907 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:22:24,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:24,509 INFO L93 Difference]: Finished difference Result 66187 states and 270738 transitions. [2021-06-05 06:22:24,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:22:24,509 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:22:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:24,708 INFO L225 Difference]: With dead ends: 66187 [2021-06-05 06:22:24,708 INFO L226 Difference]: Without dead ends: 65939 [2021-06-05 06:22:24,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1161.2ms TimeCoverageRelationStatistics Valid=335, Invalid=1471, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:22:24,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65939 states. [2021-06-05 06:22:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65939 to 38036. [2021-06-05 06:22:25,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38036 states, 38035 states have (on average 4.143736032601551) internal successors, (157607), 38035 states have internal predecessors, (157607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38036 states to 38036 states and 157607 transitions. [2021-06-05 06:22:25,851 INFO L78 Accepts]: Start accepts. Automaton has 38036 states and 157607 transitions. Word has length 39 [2021-06-05 06:22:25,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:25,851 INFO L482 AbstractCegarLoop]: Abstraction has 38036 states and 157607 transitions. [2021-06-05 06:22:25,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:22:25,852 INFO L276 IsEmpty]: Start isEmpty. Operand 38036 states and 157607 transitions. [2021-06-05 06:22:25,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:25,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:25,925 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:26,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 06:22:26,129 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:26,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:26,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1814336637, now seen corresponding path program 32 times [2021-06-05 06:22:26,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:26,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361182859] [2021-06-05 06:22:26,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:26,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:26,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361182859] [2021-06-05 06:22:26,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361182859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:26,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984777398] [2021-06-05 06:22:26,560 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:26,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:22:26,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:26,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:22:26,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:26,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:22:26,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:26,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:26,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:26,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:22:26,863 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:26,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:22:26,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:26,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:26,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:26,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:22:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:26,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984777398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:26,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:26,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:22:26,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471769846] [2021-06-05 06:22:26,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:22:26,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:26,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:22:26,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:22:26,921 INFO L87 Difference]: Start difference. First operand 38036 states and 157607 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:22:29,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:29,130 INFO L93 Difference]: Finished difference Result 83812 states and 341149 transitions. [2021-06-05 06:22:29,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:22:29,131 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:22:29,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:29,382 INFO L225 Difference]: With dead ends: 83812 [2021-06-05 06:22:29,382 INFO L226 Difference]: Without dead ends: 83644 [2021-06-05 06:22:29,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1228.5ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:22:29,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83644 states. [2021-06-05 06:22:30,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83644 to 38098. [2021-06-05 06:22:30,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38098 states, 38097 states have (on average 4.144657059610993) internal successors, (157899), 38097 states have internal predecessors, (157899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:30,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38098 states to 38098 states and 157899 transitions. [2021-06-05 06:22:30,719 INFO L78 Accepts]: Start accepts. Automaton has 38098 states and 157899 transitions. Word has length 39 [2021-06-05 06:22:30,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:30,720 INFO L482 AbstractCegarLoop]: Abstraction has 38098 states and 157899 transitions. [2021-06-05 06:22:30,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:22:30,720 INFO L276 IsEmpty]: Start isEmpty. Operand 38098 states and 157899 transitions. [2021-06-05 06:22:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:31,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:31,124 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:31,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:31,348 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:31,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:31,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2018257383, now seen corresponding path program 33 times [2021-06-05 06:22:31,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:31,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626482752] [2021-06-05 06:22:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:31,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:31,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626482752] [2021-06-05 06:22:31,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626482752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:31,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125927092] [2021-06-05 06:22:31,767 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:31,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:22:31,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:31,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 06:22:31,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:32,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:32,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:32,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-06-05 06:22:32,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:32,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:32,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:32,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:40 [2021-06-05 06:22:32,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:32,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:32,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 06:22:32,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:32,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:32,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:22:32,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:77 [2021-06-05 06:22:32,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:32,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:22:32,439 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:32,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:32,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:32,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-06-05 06:22:32,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:32,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:32,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:22:32,496 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-06-05 06:22:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:32,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125927092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:32,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:32,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:22:32,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561035512] [2021-06-05 06:22:32,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:22:32,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:32,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:22:32,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:22:32,639 INFO L87 Difference]: Start difference. First operand 38098 states and 157899 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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) [2021-06-05 06:22:36,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:36,656 INFO L93 Difference]: Finished difference Result 67483 states and 274697 transitions. [2021-06-05 06:22:36,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:22:36,657 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 39 [2021-06-05 06:22:36,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:36,865 INFO L225 Difference]: With dead ends: 67483 [2021-06-05 06:22:36,865 INFO L226 Difference]: Without dead ends: 67320 [2021-06-05 06:22:36,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 2965.9ms TimeCoverageRelationStatistics Valid=848, Invalid=4122, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:22:36,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67320 states. [2021-06-05 06:22:37,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67320 to 38298. [2021-06-05 06:22:37,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38298 states, 38297 states have (on average 4.141995456563177) internal successors, (158626), 38297 states have internal predecessors, (158626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:37,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38298 states to 38298 states and 158626 transitions. [2021-06-05 06:22:37,954 INFO L78 Accepts]: Start accepts. Automaton has 38298 states and 158626 transitions. Word has length 39 [2021-06-05 06:22:37,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:37,954 INFO L482 AbstractCegarLoop]: Abstraction has 38298 states and 158626 transitions. [2021-06-05 06:22:37,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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) [2021-06-05 06:22:37,954 INFO L276 IsEmpty]: Start isEmpty. Operand 38298 states and 158626 transitions. [2021-06-05 06:22:38,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:38,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:38,029 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:38,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 06:22:38,234 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:38,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:38,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1639438975, now seen corresponding path program 34 times [2021-06-05 06:22:38,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:38,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531057481] [2021-06-05 06:22:38,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:38,562 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-06-05 06:22:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:38,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:38,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531057481] [2021-06-05 06:22:38,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531057481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:38,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638055686] [2021-06-05 06:22:38,950 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:38,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:22:38,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:38,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:22:38,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:39,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:22:39,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:39,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:39,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:39,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:22:39,323 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:39,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:22:39,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:39,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:39,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:39,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:22:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:39,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638055686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:39,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:39,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:22:39,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452882854] [2021-06-05 06:22:39,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:22:39,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:39,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:22:39,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:22:39,392 INFO L87 Difference]: Start difference. First operand 38298 states and 158626 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:41,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:41,361 INFO L93 Difference]: Finished difference Result 84389 states and 343968 transitions. [2021-06-05 06:22:41,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:22:41,361 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:41,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:41,618 INFO L225 Difference]: With dead ends: 84389 [2021-06-05 06:22:41,618 INFO L226 Difference]: Without dead ends: 84307 [2021-06-05 06:22:41,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1602.4ms TimeCoverageRelationStatistics Valid=377, Invalid=1879, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:22:41,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84307 states. [2021-06-05 06:22:42,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84307 to 38064. [2021-06-05 06:22:42,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38064 states, 38063 states have (on average 4.147886398865039) internal successors, (157881), 38063 states have internal predecessors, (157881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:42,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38064 states to 38064 states and 157881 transitions. [2021-06-05 06:22:42,901 INFO L78 Accepts]: Start accepts. Automaton has 38064 states and 157881 transitions. Word has length 39 [2021-06-05 06:22:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:42,901 INFO L482 AbstractCegarLoop]: Abstraction has 38064 states and 157881 transitions. [2021-06-05 06:22:42,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:42,902 INFO L276 IsEmpty]: Start isEmpty. Operand 38064 states and 157881 transitions. [2021-06-05 06:22:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:42,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:42,976 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:43,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-05 06:22:43,179 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:43,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:43,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1355985241, now seen corresponding path program 35 times [2021-06-05 06:22:43,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:43,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602429728] [2021-06-05 06:22:43,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:43,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:43,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602429728] [2021-06-05 06:22:43,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602429728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:43,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049109267] [2021-06-05 06:22:43,605 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:43,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:22:43,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:43,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:22:43,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:43,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:43,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:43,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:43,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:43,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-06-05 06:22:43,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:22:43,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:43,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:43,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:50 [2021-06-05 06:22:44,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:22:44,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:44,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:44,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:22:44,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 06:22:44,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:44,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:44,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:44,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:44,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 06:22:44,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:22:44,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:44,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:44,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 06:22:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:44,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049109267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:44,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:44,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:22:44,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454016547] [2021-06-05 06:22:44,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:22:44,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:44,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:22:44,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:22:44,186 INFO L87 Difference]: Start difference. First operand 38064 states and 157881 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:22:48,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:48,147 INFO L93 Difference]: Finished difference Result 68705 states and 280705 transitions. [2021-06-05 06:22:48,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:22:48,147 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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 39 [2021-06-05 06:22:48,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:48,353 INFO L225 Difference]: With dead ends: 68705 [2021-06-05 06:22:48,353 INFO L226 Difference]: Without dead ends: 68484 [2021-06-05 06:22:48,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 2903.6ms TimeCoverageRelationStatistics Valid=710, Invalid=3982, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:22:48,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68484 states. [2021-06-05 06:22:49,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68484 to 38413. [2021-06-05 06:22:49,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38413 states, 38412 states have (on average 4.143366656253254) internal successors, (159155), 38412 states have internal predecessors, (159155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:49,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38413 states to 38413 states and 159155 transitions. [2021-06-05 06:22:49,562 INFO L78 Accepts]: Start accepts. Automaton has 38413 states and 159155 transitions. Word has length 39 [2021-06-05 06:22:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:49,563 INFO L482 AbstractCegarLoop]: Abstraction has 38413 states and 159155 transitions. [2021-06-05 06:22:49,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:22:49,563 INFO L276 IsEmpty]: Start isEmpty. Operand 38413 states and 159155 transitions. [2021-06-05 06:22:49,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:49,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:49,636 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:49,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:49,837 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:49,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:49,838 INFO L82 PathProgramCache]: Analyzing trace with hash -768675797, now seen corresponding path program 36 times [2021-06-05 06:22:49,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:49,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342639310] [2021-06-05 06:22:49,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:50,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:50,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342639310] [2021-06-05 06:22:50,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342639310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:50,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579689793] [2021-06-05 06:22:50,204 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:50,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:22:50,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:50,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 06:22:50,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:50,441 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:50,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:22:50,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:50,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:50,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:50,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 06:22:50,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:22:50,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:50,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:50,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:50,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:22:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:50,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579689793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:50,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:50,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:22:50,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321507828] [2021-06-05 06:22:50,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:22:50,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:50,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:22:50,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:22:50,559 INFO L87 Difference]: Start difference. First operand 38413 states and 159155 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:22:52,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:52,456 INFO L93 Difference]: Finished difference Result 79647 states and 323863 transitions. [2021-06-05 06:22:52,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:22:52,456 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:22:52,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:52,699 INFO L225 Difference]: With dead ends: 79647 [2021-06-05 06:22:52,700 INFO L226 Difference]: Without dead ends: 79463 [2021-06-05 06:22:52,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1177.6ms TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:22:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79463 states. [2021-06-05 06:22:53,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79463 to 38199. [2021-06-05 06:22:53,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38199 states, 38198 states have (on average 4.146683072412168) internal successors, (158395), 38198 states have internal predecessors, (158395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:54,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38199 states to 38199 states and 158395 transitions. [2021-06-05 06:22:54,005 INFO L78 Accepts]: Start accepts. Automaton has 38199 states and 158395 transitions. Word has length 39 [2021-06-05 06:22:54,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:54,006 INFO L482 AbstractCegarLoop]: Abstraction has 38199 states and 158395 transitions. [2021-06-05 06:22:54,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:22:54,006 INFO L276 IsEmpty]: Start isEmpty. Operand 38199 states and 158395 transitions. [2021-06-05 06:22:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:54,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:54,082 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:54,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:54,282 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:54,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:54,283 INFO L82 PathProgramCache]: Analyzing trace with hash -789200017, now seen corresponding path program 37 times [2021-06-05 06:22:54,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:54,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844625137] [2021-06-05 06:22:54,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:54,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:54,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844625137] [2021-06-05 06:22:54,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844625137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:54,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305463408] [2021-06-05 06:22:54,725 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:54,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:22:54,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:55,013 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:55,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:22:55,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:55,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:55,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:55,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 06:22:55,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:22:55,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:55,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:55,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:55,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:22:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:55,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305463408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:55,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:55,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:22:55,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453063999] [2021-06-05 06:22:55,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:22:55,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:55,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:22:55,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:22:55,107 INFO L87 Difference]: Start difference. First operand 38199 states and 158395 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:22:55,529 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-06-05 06:22:57,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:57,001 INFO L93 Difference]: Finished difference Result 66459 states and 271895 transitions. [2021-06-05 06:22:57,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:22:57,001 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:22:57,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:57,200 INFO L225 Difference]: With dead ends: 66459 [2021-06-05 06:22:57,200 INFO L226 Difference]: Without dead ends: 66211 [2021-06-05 06:22:57,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1503.7ms TimeCoverageRelationStatistics Valid=352, Invalid=1454, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:22:57,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66211 states. [2021-06-05 06:22:58,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66211 to 38385. [2021-06-05 06:22:58,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38385 states, 38384 states have (on average 4.144825969153814) internal successors, (159095), 38384 states have internal predecessors, (159095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38385 states to 38385 states and 159095 transitions. [2021-06-05 06:22:58,384 INFO L78 Accepts]: Start accepts. Automaton has 38385 states and 159095 transitions. Word has length 39 [2021-06-05 06:22:58,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:58,384 INFO L482 AbstractCegarLoop]: Abstraction has 38385 states and 159095 transitions. [2021-06-05 06:22:58,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:22:58,384 INFO L276 IsEmpty]: Start isEmpty. Operand 38385 states and 159095 transitions. [2021-06-05 06:22:58,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:58,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:58,461 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:58,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:58,661 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:58,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1112900731, now seen corresponding path program 38 times [2021-06-05 06:22:58,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:58,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454083962] [2021-06-05 06:22:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:59,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:59,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454083962] [2021-06-05 06:22:59,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454083962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:59,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951109093] [2021-06-05 06:22:59,000 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:59,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:22:59,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:59,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:22:59,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:59,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:22:59,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:59,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:59,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:59,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:22:59,576 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:59,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:22:59,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:59,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:59,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:59,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:22:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:59,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951109093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:59,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:59,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:22:59,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952667337] [2021-06-05 06:22:59,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:22:59,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:59,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:22:59,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:22:59,628 INFO L87 Difference]: Start difference. First operand 38385 states and 159095 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:23:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:01,608 INFO L93 Difference]: Finished difference Result 83904 states and 341551 transitions. [2021-06-05 06:23:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:23:01,609 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:23:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:01,872 INFO L225 Difference]: With dead ends: 83904 [2021-06-05 06:23:01,872 INFO L226 Difference]: Without dead ends: 83752 [2021-06-05 06:23:01,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1149.3ms TimeCoverageRelationStatistics Valid=395, Invalid=1767, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:23:01,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83752 states. [2021-06-05 06:23:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83752 to 38447. [2021-06-05 06:23:03,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38447 states, 38446 states have (on average 4.145736877698591) internal successors, (159387), 38446 states have internal predecessors, (159387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38447 states to 38447 states and 159387 transitions. [2021-06-05 06:23:03,232 INFO L78 Accepts]: Start accepts. Automaton has 38447 states and 159387 transitions. Word has length 39 [2021-06-05 06:23:03,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:03,232 INFO L482 AbstractCegarLoop]: Abstraction has 38447 states and 159387 transitions. [2021-06-05 06:23:03,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:23:03,232 INFO L276 IsEmpty]: Start isEmpty. Operand 38447 states and 159387 transitions. [2021-06-05 06:23:03,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:03,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:03,314 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:03,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:03,517 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:03,517 INFO L82 PathProgramCache]: Analyzing trace with hash -908979985, now seen corresponding path program 39 times [2021-06-05 06:23:03,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:03,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668960554] [2021-06-05 06:23:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:03,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:03,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668960554] [2021-06-05 06:23:03,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668960554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:03,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850006461] [2021-06-05 06:23:03,860 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:03,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:23:03,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:03,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 06:23:03,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:04,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:04,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-06-05 06:23:04,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:04,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:04,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:04,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:74 [2021-06-05 06:23:04,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:04,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 06:23:04,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:04,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:04,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 38 [2021-06-05 06:23:04,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:04,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:04,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-06-05 06:23:04,250 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:04,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:04,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-06-05 06:23:04,254 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:04,304 INFO L628 ElimStorePlain]: treesize reduction 30, result has 68.4 percent of original size [2021-06-05 06:23:04,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:23:04,305 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:233, output treesize:65 [2021-06-05 06:23:04,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:04,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:23:04,388 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:04,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:04,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:04,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:23:04,447 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:04,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:04,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:23:04,487 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:88, output treesize:95 [2021-06-05 06:23:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:04,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850006461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:04,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:04,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:23:04,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56035916] [2021-06-05 06:23:04,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:23:04,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:04,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:23:04,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:23:04,688 INFO L87 Difference]: Start difference. First operand 38447 states and 159387 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:08,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:08,282 INFO L93 Difference]: Finished difference Result 66874 states and 271747 transitions. [2021-06-05 06:23:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:23:08,283 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:08,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:08,467 INFO L225 Difference]: With dead ends: 66874 [2021-06-05 06:23:08,468 INFO L226 Difference]: Without dead ends: 66702 [2021-06-05 06:23:08,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 2850.3ms TimeCoverageRelationStatistics Valid=889, Invalid=3271, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:23:08,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66702 states. [2021-06-05 06:23:09,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66702 to 38469. [2021-06-05 06:23:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38469 states, 38468 states have (on average 4.145549547675991) internal successors, (159471), 38468 states have internal predecessors, (159471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:09,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38469 states to 38469 states and 159471 transitions. [2021-06-05 06:23:09,689 INFO L78 Accepts]: Start accepts. Automaton has 38469 states and 159471 transitions. Word has length 39 [2021-06-05 06:23:09,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:09,689 INFO L482 AbstractCegarLoop]: Abstraction has 38469 states and 159471 transitions. [2021-06-05 06:23:09,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:09,690 INFO L276 IsEmpty]: Start isEmpty. Operand 38469 states and 159471 transitions. [2021-06-05 06:23:09,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:09,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:09,790 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:10,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:10,005 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:10,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:10,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1386806843, now seen corresponding path program 40 times [2021-06-05 06:23:10,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:10,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683337211] [2021-06-05 06:23:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:10,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:10,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683337211] [2021-06-05 06:23:10,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683337211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:10,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678658892] [2021-06-05 06:23:10,351 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:10,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:23:10,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:10,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:23:10,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:10,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:23:10,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:10,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:10,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:10,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:23:10,678 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:23:10,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:23:10,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:10,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:10,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:10,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:23:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:10,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678658892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:10,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:10,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:23:10,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361659715] [2021-06-05 06:23:10,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:23:10,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:10,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:23:10,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:23:10,727 INFO L87 Difference]: Start difference. First operand 38469 states and 159471 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:23:12,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:12,968 INFO L93 Difference]: Finished difference Result 84495 states and 344543 transitions. [2021-06-05 06:23:12,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:23:12,968 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:23:12,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:13,259 INFO L225 Difference]: With dead ends: 84495 [2021-06-05 06:23:13,259 INFO L226 Difference]: Without dead ends: 84413 [2021-06-05 06:23:13,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1222.5ms TimeCoverageRelationStatistics Valid=399, Invalid=1857, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:23:13,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84413 states. [2021-06-05 06:23:14,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84413 to 38199. [2021-06-05 06:23:14,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38199 states, 38198 states have (on average 4.146683072412168) internal successors, (158395), 38198 states have internal predecessors, (158395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38199 states to 38199 states and 158395 transitions. [2021-06-05 06:23:14,580 INFO L78 Accepts]: Start accepts. Automaton has 38199 states and 158395 transitions. Word has length 39 [2021-06-05 06:23:14,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:14,580 INFO L482 AbstractCegarLoop]: Abstraction has 38199 states and 158395 transitions. [2021-06-05 06:23:14,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:23:14,581 INFO L276 IsEmpty]: Start isEmpty. Operand 38199 states and 158395 transitions. [2021-06-05 06:23:14,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:14,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:14,655 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:14,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:14,856 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:14,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:14,856 INFO L82 PathProgramCache]: Analyzing trace with hash -651444937, now seen corresponding path program 41 times [2021-06-05 06:23:14,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:14,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430321843] [2021-06-05 06:23:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:15,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:15,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430321843] [2021-06-05 06:23:15,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430321843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:15,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172818836] [2021-06-05 06:23:15,188 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:15,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:23:15,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:15,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:23:15,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:15,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:15,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:15,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:15,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:15,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-06-05 06:23:15,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:23:15,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:15,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:15,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:45 [2021-06-05 06:23:15,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:15,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:15,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:15,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:15,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:15,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 06:23:15,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:23:15,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:15,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:15,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:45 [2021-06-05 06:23:15,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:15,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:23:15,927 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:15,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:15,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:15,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:18 [2021-06-05 06:23:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:15,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172818836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:15,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:15,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:23:15,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81340473] [2021-06-05 06:23:15,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:23:15,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:15,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:23:15,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:23:15,993 INFO L87 Difference]: Start difference. First operand 38199 states and 158395 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:16,548 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-06-05 06:23:19,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:19,900 INFO L93 Difference]: Finished difference Result 65998 states and 269004 transitions. [2021-06-05 06:23:19,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:23:19,900 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:19,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:20,095 INFO L225 Difference]: With dead ends: 65998 [2021-06-05 06:23:20,095 INFO L226 Difference]: Without dead ends: 65904 [2021-06-05 06:23:20,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 2630.4ms TimeCoverageRelationStatistics Valid=539, Invalid=3493, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:23:20,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65904 states. [2021-06-05 06:23:21,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65904 to 38945. [2021-06-05 06:23:21,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38945 states, 38944 states have (on average 4.145259860312243) internal successors, (161433), 38944 states have internal predecessors, (161433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:21,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38945 states to 38945 states and 161433 transitions. [2021-06-05 06:23:21,259 INFO L78 Accepts]: Start accepts. Automaton has 38945 states and 161433 transitions. Word has length 39 [2021-06-05 06:23:21,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:21,260 INFO L482 AbstractCegarLoop]: Abstraction has 38945 states and 161433 transitions. [2021-06-05 06:23:21,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:21,260 INFO L276 IsEmpty]: Start isEmpty. Operand 38945 states and 161433 transitions. [2021-06-05 06:23:21,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:21,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:21,330 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:21,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 06:23:21,531 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:21,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:21,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1147513441, now seen corresponding path program 42 times [2021-06-05 06:23:21,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:21,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114846234] [2021-06-05 06:23:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:21,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:21,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114846234] [2021-06-05 06:23:21,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114846234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:21,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973409053] [2021-06-05 06:23:21,817 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:21,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:23:21,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:21,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:23:21,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:22,034 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:23:22,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:23:22,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:22,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:22,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:22,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 06:23:22,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:23:22,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:22,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:22,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:22,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:15 [2021-06-05 06:23:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:22,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973409053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:22,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:22,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:23:22,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741276976] [2021-06-05 06:23:22,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:23:22,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:22,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:23:22,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:23:22,141 INFO L87 Difference]: Start difference. First operand 38945 states and 161433 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:23:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:24,146 INFO L93 Difference]: Finished difference Result 75097 states and 308762 transitions. [2021-06-05 06:23:24,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:23:24,147 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:23:24,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:24,388 INFO L225 Difference]: With dead ends: 75097 [2021-06-05 06:23:24,388 INFO L226 Difference]: Without dead ends: 75042 [2021-06-05 06:23:24,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1035.7ms TimeCoverageRelationStatistics Valid=338, Invalid=1468, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:23:24,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75042 states. [2021-06-05 06:23:25,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75042 to 39019. [2021-06-05 06:23:25,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39019 states, 39018 states have (on average 4.1427802552668) internal successors, (161643), 39018 states have internal predecessors, (161643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:25,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39019 states to 39019 states and 161643 transitions. [2021-06-05 06:23:25,696 INFO L78 Accepts]: Start accepts. Automaton has 39019 states and 161643 transitions. Word has length 39 [2021-06-05 06:23:25,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:25,696 INFO L482 AbstractCegarLoop]: Abstraction has 39019 states and 161643 transitions. [2021-06-05 06:23:25,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:23:25,696 INFO L276 IsEmpty]: Start isEmpty. Operand 39019 states and 161643 transitions. [2021-06-05 06:23:25,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:25,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:25,777 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:25,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 06:23:25,978 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:25,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:25,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1283074537, now seen corresponding path program 43 times [2021-06-05 06:23:25,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:25,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828568713] [2021-06-05 06:23:25,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:26,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:26,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828568713] [2021-06-05 06:23:26,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828568713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:26,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555460844] [2021-06-05 06:23:26,366 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:26,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:23:26,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:26,587 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:23:26,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:23:26,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:26,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:26,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:26,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-06-05 06:23:26,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:23:26,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:26,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:26,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:26,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:23:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:26,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555460844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:26,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:26,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:23:26,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028711619] [2021-06-05 06:23:26,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:23:26,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:26,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:23:26,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:23:26,709 INFO L87 Difference]: Start difference. First operand 39019 states and 161643 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:23:27,526 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-06-05 06:23:29,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:29,037 INFO L93 Difference]: Finished difference Result 70745 states and 289441 transitions. [2021-06-05 06:23:29,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:23:29,038 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:23:29,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:29,249 INFO L225 Difference]: With dead ends: 70745 [2021-06-05 06:23:29,249 INFO L226 Difference]: Without dead ends: 70529 [2021-06-05 06:23:29,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1475.4ms TimeCoverageRelationStatistics Valid=335, Invalid=1735, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:23:29,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70529 states. [2021-06-05 06:23:30,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70529 to 38869. [2021-06-05 06:23:30,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38869 states, 38868 states have (on average 4.143640012349491) internal successors, (161055), 38868 states have internal predecessors, (161055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:30,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38869 states to 38869 states and 161055 transitions. [2021-06-05 06:23:30,492 INFO L78 Accepts]: Start accepts. Automaton has 38869 states and 161055 transitions. Word has length 39 [2021-06-05 06:23:30,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:30,492 INFO L482 AbstractCegarLoop]: Abstraction has 38869 states and 161055 transitions. [2021-06-05 06:23:30,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:23:30,492 INFO L276 IsEmpty]: Start isEmpty. Operand 38869 states and 161055 transitions. [2021-06-05 06:23:30,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:30,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:30,570 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:30,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-06-05 06:23:30,771 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:30,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:30,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1808675789, now seen corresponding path program 44 times [2021-06-05 06:23:30,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:30,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889846419] [2021-06-05 06:23:30,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:31,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:31,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889846419] [2021-06-05 06:23:31,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889846419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:31,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144780159] [2021-06-05 06:23:31,077 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:31,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:23:31,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:31,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:23:31,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:31,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:23:31,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:31,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:31,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:31,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-05 06:23:31,671 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:23:31,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:23:31,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:31,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:31,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:31,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-06-05 06:23:31,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:31,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:23:31,749 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:31,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:31,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:31,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:23:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:31,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144780159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:31,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:31,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:23:31,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069498038] [2021-06-05 06:23:31,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:23:31,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:31,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:23:31,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:23:31,803 INFO L87 Difference]: Start difference. First operand 38869 states and 161055 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:34,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:34,252 INFO L93 Difference]: Finished difference Result 91056 states and 375094 transitions. [2021-06-05 06:23:34,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:23:34,252 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:34,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:34,547 INFO L225 Difference]: With dead ends: 91056 [2021-06-05 06:23:34,547 INFO L226 Difference]: Without dead ends: 91001 [2021-06-05 06:23:34,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1567.1ms TimeCoverageRelationStatistics Valid=407, Invalid=2349, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:23:34,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91001 states. [2021-06-05 06:23:35,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91001 to 39391. [2021-06-05 06:23:35,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39391 states, 39390 states have (on average 4.1452399086062455) internal successors, (163281), 39390 states have internal predecessors, (163281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39391 states to 39391 states and 163281 transitions. [2021-06-05 06:23:35,899 INFO L78 Accepts]: Start accepts. Automaton has 39391 states and 163281 transitions. Word has length 39 [2021-06-05 06:23:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:35,899 INFO L482 AbstractCegarLoop]: Abstraction has 39391 states and 163281 transitions. [2021-06-05 06:23:35,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 39391 states and 163281 transitions. [2021-06-05 06:23:35,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:35,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:35,979 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:36,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:36,181 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:36,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1848703477, now seen corresponding path program 45 times [2021-06-05 06:23:36,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:36,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262489732] [2021-06-05 06:23:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:36,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:36,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262489732] [2021-06-05 06:23:36,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262489732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:36,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896107940] [2021-06-05 06:23:36,512 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:36,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:23:36,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:36,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 06:23:36,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:36,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:36,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:23:36,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:36,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:36,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:36,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:69 [2021-06-05 06:23:37,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:37,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 39 [2021-06-05 06:23:37,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:37,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:37,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 06:23:37,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:23:37,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:37,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:37,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 06:23:37,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:37,206 INFO L628 ElimStorePlain]: treesize reduction 16, result has 89.5 percent of original size [2021-06-05 06:23:37,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:23:37,216 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:185, output treesize:185 [2021-06-05 06:23:37,347 INFO L446 ElimStorePlain]: Different costs {0=[q2], 1=[v_prenex_8]} [2021-06-05 06:23:37,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2021-06-05 06:23:37,351 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:37,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:37,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:37,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:23:37,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:37,404 INFO L628 ElimStorePlain]: treesize reduction 13, result has 72.3 percent of original size [2021-06-05 06:23:37,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:37,405 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:66, output treesize:32 [2021-06-05 06:23:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:37,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896107940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:37,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:37,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-06-05 06:23:37,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563324838] [2021-06-05 06:23:37,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:23:37,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:37,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:23:37,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:23:37,468 INFO L87 Difference]: Start difference. First operand 39391 states and 163281 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:41,157 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 06:23:41,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:41,628 INFO L93 Difference]: Finished difference Result 80465 states and 329554 transitions. [2021-06-05 06:23:41,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:23:41,629 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:41,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:41,867 INFO L225 Difference]: With dead ends: 80465 [2021-06-05 06:23:41,867 INFO L226 Difference]: Without dead ends: 80383 [2021-06-05 06:23:41,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 2670.5ms TimeCoverageRelationStatistics Valid=525, Invalid=4445, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:23:41,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80383 states. [2021-06-05 06:23:42,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80383 to 39603. [2021-06-05 06:23:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39603 states, 39602 states have (on average 4.142997828392505) internal successors, (164071), 39602 states have internal predecessors, (164071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:43,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39603 states to 39603 states and 164071 transitions. [2021-06-05 06:23:43,090 INFO L78 Accepts]: Start accepts. Automaton has 39603 states and 164071 transitions. Word has length 39 [2021-06-05 06:23:43,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:43,090 INFO L482 AbstractCegarLoop]: Abstraction has 39603 states and 164071 transitions. [2021-06-05 06:23:43,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:43,090 INFO L276 IsEmpty]: Start isEmpty. Operand 39603 states and 164071 transitions. [2021-06-05 06:23:43,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:43,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:43,171 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:43,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 06:23:43,371 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:43,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:43,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1027270795, now seen corresponding path program 46 times [2021-06-05 06:23:43,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:43,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968789042] [2021-06-05 06:23:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:43,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:43,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968789042] [2021-06-05 06:23:43,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968789042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:43,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560493967] [2021-06-05 06:23:43,647 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:43,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:23:43,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:43,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:23:43,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:43,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:23:43,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:43,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:43,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:43,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:23:43,961 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:23:43,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:23:43,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:43,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:43,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:43,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:23:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:43,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560493967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:43,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:43,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:23:43,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363524658] [2021-06-05 06:23:43,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:23:43,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:43,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:23:43,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:23:43,999 INFO L87 Difference]: Start difference. First operand 39603 states and 164071 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:46,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:46,323 INFO L93 Difference]: Finished difference Result 87268 states and 359857 transitions. [2021-06-05 06:23:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:23:46,324 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:46,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:46,589 INFO L225 Difference]: With dead ends: 87268 [2021-06-05 06:23:46,589 INFO L226 Difference]: Without dead ends: 87213 [2021-06-05 06:23:46,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 879.3ms TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:23:46,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87213 states. [2021-06-05 06:23:47,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87213 to 39607. [2021-06-05 06:23:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39607 states, 39606 states have (on average 4.146821188708781) internal successors, (164239), 39606 states have internal predecessors, (164239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39607 states to 39607 states and 164239 transitions. [2021-06-05 06:23:47,985 INFO L78 Accepts]: Start accepts. Automaton has 39607 states and 164239 transitions. Word has length 39 [2021-06-05 06:23:47,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:47,985 INFO L482 AbstractCegarLoop]: Abstraction has 39607 states and 164239 transitions. [2021-06-05 06:23:47,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 39607 states and 164239 transitions. [2021-06-05 06:23:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:48,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:48,064 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:48,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 06:23:48,269 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1837073937, now seen corresponding path program 47 times [2021-06-05 06:23:48,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:48,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008808340] [2021-06-05 06:23:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:48,712 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-06-05 06:23:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:49,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:49,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008808340] [2021-06-05 06:23:49,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008808340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:49,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885673843] [2021-06-05 06:23:49,035 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:49,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:23:49,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:49,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:23:49,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:49,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:23:49,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:49,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:49,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:49,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:32 [2021-06-05 06:23:49,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:49,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:49,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:49,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:49,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2021-06-05 06:23:49,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:23:49,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:49,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:49,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:25 [2021-06-05 06:23:49,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:49,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:23:49,472 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:49,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:49,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:49,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:33 [2021-06-05 06:23:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:49,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885673843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:49,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:49,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:23:49,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286179137] [2021-06-05 06:23:49,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:23:49,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:49,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:23:49,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:23:49,588 INFO L87 Difference]: Start difference. First operand 39607 states and 164239 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:23:52,003 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-05 06:23:53,376 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-06-05 06:23:53,950 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-06-05 06:23:54,106 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 06:23:57,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:57,548 INFO L93 Difference]: Finished difference Result 139922 states and 566971 transitions. [2021-06-05 06:23:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 06:23:57,549 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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 39 [2021-06-05 06:23:57,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:58,383 INFO L225 Difference]: With dead ends: 139922 [2021-06-05 06:23:58,383 INFO L226 Difference]: Without dead ends: 139812 [2021-06-05 06:23:58,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4049 ImplicationChecksByTransitivity, 6341.1ms TimeCoverageRelationStatistics Valid=2037, Invalid=9305, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 06:23:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139812 states. [2021-06-05 06:23:59,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139812 to 39796. [2021-06-05 06:24:00,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39796 states, 39795 states have (on average 4.149943460233698) internal successors, (165147), 39795 states have internal predecessors, (165147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:00,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39796 states to 39796 states and 165147 transitions. [2021-06-05 06:24:00,162 INFO L78 Accepts]: Start accepts. Automaton has 39796 states and 165147 transitions. Word has length 39 [2021-06-05 06:24:00,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:00,162 INFO L482 AbstractCegarLoop]: Abstraction has 39796 states and 165147 transitions. [2021-06-05 06:24:00,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:24:00,163 INFO L276 IsEmpty]: Start isEmpty. Operand 39796 states and 165147 transitions. [2021-06-05 06:24:00,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:00,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:00,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:00,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 06:24:00,438 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:00,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:00,439 INFO L82 PathProgramCache]: Analyzing trace with hash -49954505, now seen corresponding path program 48 times [2021-06-05 06:24:00,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:00,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585225475] [2021-06-05 06:24:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:00,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:00,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585225475] [2021-06-05 06:24:00,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585225475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:00,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134893542] [2021-06-05 06:24:00,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:00,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:24:00,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:00,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 06:24:00,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:00,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:24:00,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:00,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:00,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:24:00,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:28 [2021-06-05 06:24:01,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:01,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:24:01,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:01,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:01,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:01,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:23 [2021-06-05 06:24:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:01,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134893542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:01,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:01,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:24:01,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857510925] [2021-06-05 06:24:01,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:24:01,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:01,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:24:01,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:24:01,191 INFO L87 Difference]: Start difference. First operand 39796 states and 165147 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2021-06-05 06:24:02,250 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 06:24:04,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:04,327 INFO L93 Difference]: Finished difference Result 79079 states and 323924 transitions. [2021-06-05 06:24:04,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:24:04,327 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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 39 [2021-06-05 06:24:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:04,916 INFO L225 Difference]: With dead ends: 79079 [2021-06-05 06:24:04,916 INFO L226 Difference]: Without dead ends: 79024 [2021-06-05 06:24:04,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 2152.0ms TimeCoverageRelationStatistics Valid=620, Invalid=3412, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:24:05,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79024 states. [2021-06-05 06:24:05,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79024 to 40405. [2021-06-05 06:24:05,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40405 states, 40404 states have (on average 4.151692901692901) internal successors, (167745), 40404 states have internal predecessors, (167745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:06,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40405 states to 40405 states and 167745 transitions. [2021-06-05 06:24:06,273 INFO L78 Accepts]: Start accepts. Automaton has 40405 states and 167745 transitions. Word has length 39 [2021-06-05 06:24:06,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:06,273 INFO L482 AbstractCegarLoop]: Abstraction has 40405 states and 167745 transitions. [2021-06-05 06:24:06,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2021-06-05 06:24:06,274 INFO L276 IsEmpty]: Start isEmpty. Operand 40405 states and 167745 transitions. [2021-06-05 06:24:06,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:06,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:06,388 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:06,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:06,588 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:06,589 INFO L82 PathProgramCache]: Analyzing trace with hash 589013065, now seen corresponding path program 49 times [2021-06-05 06:24:06,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:06,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048723227] [2021-06-05 06:24:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:06,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:06,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048723227] [2021-06-05 06:24:06,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048723227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:06,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156327048] [2021-06-05 06:24:06,923 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:06,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:24:06,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:07,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:24:07,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:07,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:07,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:07,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:24:07,242 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:24:07,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:24:07,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:07,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:07,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:07,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:24:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:07,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156327048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:07,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:07,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:24:07,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553498540] [2021-06-05 06:24:07,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:24:07,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:07,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:24:07,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:24:07,301 INFO L87 Difference]: Start difference. First operand 40405 states and 167745 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:09,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:09,642 INFO L93 Difference]: Finished difference Result 95721 states and 391683 transitions. [2021-06-05 06:24:09,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:24:09,642 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:24:09,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:09,934 INFO L225 Difference]: With dead ends: 95721 [2021-06-05 06:24:09,935 INFO L226 Difference]: Without dead ends: 95666 [2021-06-05 06:24:09,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1170.4ms TimeCoverageRelationStatistics Valid=402, Invalid=1950, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:24:10,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95666 states. [2021-06-05 06:24:11,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95666 to 39753. [2021-06-05 06:24:11,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39753 states, 39752 states have (on average 4.149049104447575) internal successors, (164933), 39752 states have internal predecessors, (164933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:11,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39753 states to 39753 states and 164933 transitions. [2021-06-05 06:24:11,359 INFO L78 Accepts]: Start accepts. Automaton has 39753 states and 164933 transitions. Word has length 39 [2021-06-05 06:24:11,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:11,359 INFO L482 AbstractCegarLoop]: Abstraction has 39753 states and 164933 transitions. [2021-06-05 06:24:11,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:11,359 INFO L276 IsEmpty]: Start isEmpty. Operand 39753 states and 164933 transitions. [2021-06-05 06:24:11,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:11,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:11,437 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:11,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 06:24:11,637 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:11,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:11,638 INFO L82 PathProgramCache]: Analyzing trace with hash 449743517, now seen corresponding path program 50 times [2021-06-05 06:24:11,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:11,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112884467] [2021-06-05 06:24:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:12,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:12,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112884467] [2021-06-05 06:24:12,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112884467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:12,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975783291] [2021-06-05 06:24:12,069 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:12,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:24:12,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:12,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:24:12,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:12,334 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:24:12,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:24:12,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:12,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:12,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:12,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 06:24:12,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:24:12,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:12,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:12,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:12,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:24:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:12,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975783291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:12,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:12,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:24:12,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353175211] [2021-06-05 06:24:12,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:24:12,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:12,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:24:12,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:24:12,422 INFO L87 Difference]: Start difference. First operand 39753 states and 164933 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:24:14,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:14,442 INFO L93 Difference]: Finished difference Result 72095 states and 294855 transitions. [2021-06-05 06:24:14,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:24:14,442 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:24:14,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:14,671 INFO L225 Difference]: With dead ends: 72095 [2021-06-05 06:24:14,671 INFO L226 Difference]: Without dead ends: 71847 [2021-06-05 06:24:14,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1539.5ms TimeCoverageRelationStatistics Valid=352, Invalid=1628, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:24:14,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71847 states. [2021-06-05 06:24:15,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71847 to 39939. [2021-06-05 06:24:15,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39939 states, 39938 states have (on average 4.147253242525915) internal successors, (165633), 39938 states have internal predecessors, (165633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:15,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39939 states to 39939 states and 165633 transitions. [2021-06-05 06:24:15,937 INFO L78 Accepts]: Start accepts. Automaton has 39939 states and 165633 transitions. Word has length 39 [2021-06-05 06:24:15,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:15,937 INFO L482 AbstractCegarLoop]: Abstraction has 39939 states and 165633 transitions. [2021-06-05 06:24:15,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:24:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 39939 states and 165633 transitions. [2021-06-05 06:24:16,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:16,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:16,014 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:16,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 06:24:16,215 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:16,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:16,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1828137727, now seen corresponding path program 51 times [2021-06-05 06:24:16,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:16,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744989904] [2021-06-05 06:24:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:16,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:16,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744989904] [2021-06-05 06:24:16,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744989904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:16,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321233690] [2021-06-05 06:24:16,612 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:16,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:24:16,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:16,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:24:16,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:17,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:17,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:24:17,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:17,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:17,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:24:17,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:68 [2021-06-05 06:24:17,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:17,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:17,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-06-05 06:24:17,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:17,461 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:24:17,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-06-05 06:24:17,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:17,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:17,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:17,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-06-05 06:24:17,481 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:17,489 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:24:17,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:24:17,490 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:17,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:17,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 06:24:17,573 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:241, output treesize:212 [2021-06-05 06:24:17,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:17,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:24:17,817 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:17,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:17,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:17,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:45 [2021-06-05 06:24:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:17,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321233690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:17,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:17,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-05 06:24:17,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982722858] [2021-06-05 06:24:17,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:24:17,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:17,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:24:17,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:24:17,939 INFO L87 Difference]: Start difference. First operand 39939 states and 165633 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:20,061 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-05 06:24:23,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:23,009 INFO L93 Difference]: Finished difference Result 80410 states and 324461 transitions. [2021-06-05 06:24:23,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 06:24:23,009 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:24:23,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:23,262 INFO L225 Difference]: With dead ends: 80410 [2021-06-05 06:24:23,262 INFO L226 Difference]: Without dead ends: 80120 [2021-06-05 06:24:23,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 4308.9ms TimeCoverageRelationStatistics Valid=1141, Invalid=5831, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 06:24:23,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80120 states. [2021-06-05 06:24:24,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80120 to 39885. [2021-06-05 06:24:24,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39885 states, 39884 states have (on average 4.14775348510681) internal successors, (165429), 39884 states have internal predecessors, (165429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39885 states to 39885 states and 165429 transitions. [2021-06-05 06:24:24,626 INFO L78 Accepts]: Start accepts. Automaton has 39885 states and 165429 transitions. Word has length 39 [2021-06-05 06:24:24,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:24,626 INFO L482 AbstractCegarLoop]: Abstraction has 39885 states and 165429 transitions. [2021-06-05 06:24:24,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:24,627 INFO L276 IsEmpty]: Start isEmpty. Operand 39885 states and 165429 transitions. [2021-06-05 06:24:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:24,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:24,710 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:24,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 06:24:24,910 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:24,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:24,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1624216981, now seen corresponding path program 52 times [2021-06-05 06:24:24,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:24,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842654743] [2021-06-05 06:24:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:25,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:25,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842654743] [2021-06-05 06:24:25,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842654743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:25,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480791044] [2021-06-05 06:24:25,276 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:25,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:24:25,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:25,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:24:25,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:25,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:24:25,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:25,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:25,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:25,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:24:25,565 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:24:25,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:24:25,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:25,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:25,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:25,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:24:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:25,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480791044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:25,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:25,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:24:25,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076906927] [2021-06-05 06:24:25,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:24:25,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:25,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:24:25,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:24:25,614 INFO L87 Difference]: Start difference. First operand 39885 states and 165429 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:24:27,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:27,449 INFO L93 Difference]: Finished difference Result 74871 states and 306050 transitions. [2021-06-05 06:24:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:24:27,450 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:24:27,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:27,666 INFO L225 Difference]: With dead ends: 74871 [2021-06-05 06:24:27,666 INFO L226 Difference]: Without dead ends: 74781 [2021-06-05 06:24:27,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1082.1ms TimeCoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:24:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74781 states. [2021-06-05 06:24:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74781 to 40001. [2021-06-05 06:24:28,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40001 states, 40000 states have (on average 4.148125) internal successors, (165925), 40000 states have internal predecessors, (165925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40001 states to 40001 states and 165925 transitions. [2021-06-05 06:24:28,930 INFO L78 Accepts]: Start accepts. Automaton has 40001 states and 165925 transitions. Word has length 39 [2021-06-05 06:24:28,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:28,930 INFO L482 AbstractCegarLoop]: Abstraction has 40001 states and 165925 transitions. [2021-06-05 06:24:28,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:24:28,930 INFO L276 IsEmpty]: Start isEmpty. Operand 40001 states and 165925 transitions. [2021-06-05 06:24:29,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:29,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:29,007 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:29,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:29,207 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:29,208 INFO L82 PathProgramCache]: Analyzing trace with hash 539098859, now seen corresponding path program 53 times [2021-06-05 06:24:29,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:29,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909115155] [2021-06-05 06:24:29,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:29,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:29,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909115155] [2021-06-05 06:24:29,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909115155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:29,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072122733] [2021-06-05 06:24:29,618 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:29,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:24:29,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:29,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 06:24:29,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:29,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:24:29,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:29,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:29,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:24:29,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-06-05 06:24:29,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:29,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:24:29,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:29,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:30,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:24:30,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:37 [2021-06-05 06:24:30,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:30,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:30,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:30,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:30,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 06:24:30,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:24:30,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:30,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:30,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 06:24:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:30,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072122733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:30,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:30,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:24:30,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902033892] [2021-06-05 06:24:30,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:24:30,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:30,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:24:30,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:24:30,220 INFO L87 Difference]: Start difference. First operand 40001 states and 165925 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:24:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:38,885 INFO L93 Difference]: Finished difference Result 127219 states and 517154 transitions. [2021-06-05 06:24:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 06:24:38,885 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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 39 [2021-06-05 06:24:38,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:39,296 INFO L225 Difference]: With dead ends: 127219 [2021-06-05 06:24:39,296 INFO L226 Difference]: Without dead ends: 126796 [2021-06-05 06:24:39,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3618 ImplicationChecksByTransitivity, 5539.4ms TimeCoverageRelationStatistics Valid=1727, Invalid=9829, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 06:24:39,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126796 states. [2021-06-05 06:24:40,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126796 to 40288. [2021-06-05 06:24:40,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40288 states, 40287 states have (on average 4.146747089631891) internal successors, (167060), 40287 states have internal predecessors, (167060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40288 states to 40288 states and 167060 transitions. [2021-06-05 06:24:41,009 INFO L78 Accepts]: Start accepts. Automaton has 40288 states and 167060 transitions. Word has length 39 [2021-06-05 06:24:41,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:41,009 INFO L482 AbstractCegarLoop]: Abstraction has 40288 states and 167060 transitions. [2021-06-05 06:24:41,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:24:41,009 INFO L276 IsEmpty]: Start isEmpty. Operand 40288 states and 167060 transitions. [2021-06-05 06:24:41,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:41,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:41,086 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:41,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:41,289 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:41,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:41,289 INFO L82 PathProgramCache]: Analyzing trace with hash 140092723, now seen corresponding path program 54 times [2021-06-05 06:24:41,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:41,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791134722] [2021-06-05 06:24:41,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:41,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:41,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791134722] [2021-06-05 06:24:41,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791134722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:41,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959901246] [2021-06-05 06:24:41,583 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:41,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:24:41,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:41,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:24:41,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:41,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:24:41,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:41,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:41,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:41,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-06-05 06:24:41,849 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:24:41,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:24:41,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:41,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:41,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:41,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-06-05 06:24:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:41,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959901246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:41,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:41,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:24:41,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228056470] [2021-06-05 06:24:41,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:24:41,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:41,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:24:41,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:24:41,949 INFO L87 Difference]: Start difference. First operand 40288 states and 167060 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:44,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:44,117 INFO L93 Difference]: Finished difference Result 88172 states and 363044 transitions. [2021-06-05 06:24:44,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:24:44,117 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:24:44,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:44,383 INFO L225 Difference]: With dead ends: 88172 [2021-06-05 06:24:44,383 INFO L226 Difference]: Without dead ends: 88117 [2021-06-05 06:24:44,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1430.5ms TimeCoverageRelationStatistics Valid=335, Invalid=2017, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:24:44,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88117 states. [2021-06-05 06:24:45,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88117 to 41912. [2021-06-05 06:24:45,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41912 states, 41911 states have (on average 4.144592111856076) internal successors, (173704), 41911 states have internal predecessors, (173704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:45,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41912 states to 41912 states and 173704 transitions. [2021-06-05 06:24:45,829 INFO L78 Accepts]: Start accepts. Automaton has 41912 states and 173704 transitions. Word has length 39 [2021-06-05 06:24:45,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:45,830 INFO L482 AbstractCegarLoop]: Abstraction has 41912 states and 173704 transitions. [2021-06-05 06:24:45,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:45,830 INFO L276 IsEmpty]: Start isEmpty. Operand 41912 states and 173704 transitions. [2021-06-05 06:24:46,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:46,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:46,264 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:46,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:46,464 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:46,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:46,465 INFO L82 PathProgramCache]: Analyzing trace with hash -497495307, now seen corresponding path program 55 times [2021-06-05 06:24:46,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:46,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71417612] [2021-06-05 06:24:46,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:46,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:46,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71417612] [2021-06-05 06:24:46,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71417612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:46,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202592277] [2021-06-05 06:24:46,746 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:46,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:24:46,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:46,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:24:46,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:46,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:46,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:46,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 06:24:47,063 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:24:47,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:24:47,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:47,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:47,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:47,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:24:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:47,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202592277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:47,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:47,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:24:47,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2832942] [2021-06-05 06:24:47,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:24:47,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:47,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:24:47,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:24:47,103 INFO L87 Difference]: Start difference. First operand 41912 states and 173704 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:49,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:49,477 INFO L93 Difference]: Finished difference Result 96411 states and 397709 transitions. [2021-06-05 06:24:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:24:49,478 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:24:49,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:49,773 INFO L225 Difference]: With dead ends: 96411 [2021-06-05 06:24:49,773 INFO L226 Difference]: Without dead ends: 96356 [2021-06-05 06:24:49,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 927.2ms TimeCoverageRelationStatistics Valid=269, Invalid=1623, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:24:49,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96356 states. [2021-06-05 06:24:51,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96356 to 43963. [2021-06-05 06:24:51,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43963 states, 43962 states have (on average 4.147149811200582) internal successors, (182317), 43962 states have internal predecessors, (182317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:51,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43963 states to 43963 states and 182317 transitions. [2021-06-05 06:24:51,249 INFO L78 Accepts]: Start accepts. Automaton has 43963 states and 182317 transitions. Word has length 39 [2021-06-05 06:24:51,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:51,249 INFO L482 AbstractCegarLoop]: Abstraction has 43963 states and 182317 transitions. [2021-06-05 06:24:51,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:51,249 INFO L276 IsEmpty]: Start isEmpty. Operand 43963 states and 182317 transitions. [2021-06-05 06:24:51,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:51,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:51,334 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:51,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:51,535 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:51,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:51,535 INFO L82 PathProgramCache]: Analyzing trace with hash 921497717, now seen corresponding path program 56 times [2021-06-05 06:24:51,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:51,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820386913] [2021-06-05 06:24:51,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:51,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:51,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820386913] [2021-06-05 06:24:51,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820386913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:51,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291048928] [2021-06-05 06:24:51,808 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:51,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:24:51,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:51,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:24:51,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:51,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:24:51,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:52,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:52,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:52,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 06:24:52,097 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:24:52,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:24:52,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:52,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:52,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:52,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:24:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:52,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291048928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:52,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:52,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:24:52,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32000747] [2021-06-05 06:24:52,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:24:52,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:52,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:24:52,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:24:52,134 INFO L87 Difference]: Start difference. First operand 43963 states and 182317 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:54,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:54,366 INFO L93 Difference]: Finished difference Result 93435 states and 385265 transitions. [2021-06-05 06:24:54,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:24:54,367 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:24:54,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:54,657 INFO L225 Difference]: With dead ends: 93435 [2021-06-05 06:24:54,657 INFO L226 Difference]: Without dead ends: 93380 [2021-06-05 06:24:54,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1227.0ms TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:24:54,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93380 states. [2021-06-05 06:24:56,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93380 to 42897. [2021-06-05 06:24:56,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42897 states, 42896 states have (on average 4.143673069750093) internal successors, (177747), 42896 states have internal predecessors, (177747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42897 states to 42897 states and 177747 transitions. [2021-06-05 06:24:56,195 INFO L78 Accepts]: Start accepts. Automaton has 42897 states and 177747 transitions. Word has length 39 [2021-06-05 06:24:56,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:56,195 INFO L482 AbstractCegarLoop]: Abstraction has 42897 states and 177747 transitions. [2021-06-05 06:24:56,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:56,195 INFO L276 IsEmpty]: Start isEmpty. Operand 42897 states and 177747 transitions. [2021-06-05 06:24:56,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:56,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:56,655 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:56,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:56,856 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:56,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:56,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1615119669, now seen corresponding path program 57 times [2021-06-05 06:24:56,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:56,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547243435] [2021-06-05 06:24:56,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:57,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:57,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547243435] [2021-06-05 06:24:57,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547243435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:57,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005313914] [2021-06-05 06:24:57,121 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:57,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:24:57,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:57,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:24:57,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:57,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:57,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:24:57,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:57,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:57,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:57,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:63 [2021-06-05 06:24:57,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:57,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 06:24:57,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:24:57,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:57,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:57,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 06:24:57,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:57,646 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:24:57,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:24:57,648 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:57,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:57,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:24:57,697 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:157, output treesize:159 [2021-06-05 06:24:57,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:57,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:24:57,848 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:57,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:57,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:57,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:24:57,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:57,910 INFO L628 ElimStorePlain]: treesize reduction 10, result has 78.3 percent of original size [2021-06-05 06:24:57,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:57,913 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:37 [2021-06-05 06:24:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:57,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005313914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:57,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:57,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:24:57,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468067434] [2021-06-05 06:24:57,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:24:57,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:57,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:24:57,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:24:57,986 INFO L87 Difference]: Start difference. First operand 42897 states and 177747 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:59,901 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 06:25:03,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:03,441 INFO L93 Difference]: Finished difference Result 91613 states and 374483 transitions. [2021-06-05 06:25:03,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:25:03,441 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:03,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:03,719 INFO L225 Difference]: With dead ends: 91613 [2021-06-05 06:25:03,719 INFO L226 Difference]: Without dead ends: 91519 [2021-06-05 06:25:03,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 4167.6ms TimeCoverageRelationStatistics Valid=844, Invalid=5636, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 06:25:03,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91519 states. [2021-06-05 06:25:04,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91519 to 43369. [2021-06-05 06:25:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43369 states, 43368 states have (on average 4.142778085224128) internal successors, (179664), 43368 states have internal predecessors, (179664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43369 states to 43369 states and 179664 transitions. [2021-06-05 06:25:05,152 INFO L78 Accepts]: Start accepts. Automaton has 43369 states and 179664 transitions. Word has length 39 [2021-06-05 06:25:05,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:05,152 INFO L482 AbstractCegarLoop]: Abstraction has 43369 states and 179664 transitions. [2021-06-05 06:25:05,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:05,152 INFO L276 IsEmpty]: Start isEmpty. Operand 43369 states and 179664 transitions. [2021-06-05 06:25:05,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:05,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:05,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:05,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:05,439 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:05,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:05,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1260854603, now seen corresponding path program 58 times [2021-06-05 06:25:05,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:05,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101864895] [2021-06-05 06:25:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:05,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:05,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101864895] [2021-06-05 06:25:05,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101864895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:05,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086529002] [2021-06-05 06:25:05,710 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:05,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:25:05,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:05,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:25:05,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:05,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:25:05,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:05,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:05,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:05,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 06:25:06,007 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:25:06,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:25:06,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:06,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:06,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:06,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:25:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:06,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086529002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:06,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:06,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:25:06,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709466273] [2021-06-05 06:25:06,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:25:06,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:06,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:25:06,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:25:06,047 INFO L87 Difference]: Start difference. First operand 43369 states and 179664 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:07,189 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-06-05 06:25:08,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:08,091 INFO L93 Difference]: Finished difference Result 93784 states and 387024 transitions. [2021-06-05 06:25:08,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:25:08,092 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:08,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:08,392 INFO L225 Difference]: With dead ends: 93784 [2021-06-05 06:25:08,392 INFO L226 Difference]: Without dead ends: 93729 [2021-06-05 06:25:08,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1136.0ms TimeCoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:25:08,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93729 states. [2021-06-05 06:25:09,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93729 to 43785. [2021-06-05 06:25:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43785 states, 43784 states have (on average 4.146080760095012) internal successors, (181532), 43784 states have internal predecessors, (181532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:09,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43785 states to 43785 states and 181532 transitions. [2021-06-05 06:25:09,993 INFO L78 Accepts]: Start accepts. Automaton has 43785 states and 181532 transitions. Word has length 39 [2021-06-05 06:25:09,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:09,993 INFO L482 AbstractCegarLoop]: Abstraction has 43785 states and 181532 transitions. [2021-06-05 06:25:09,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:09,993 INFO L276 IsEmpty]: Start isEmpty. Operand 43785 states and 181532 transitions. [2021-06-05 06:25:10,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:10,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:10,076 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:10,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 06:25:10,277 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:10,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:10,277 INFO L82 PathProgramCache]: Analyzing trace with hash -595147851, now seen corresponding path program 59 times [2021-06-05 06:25:10,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:10,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068611546] [2021-06-05 06:25:10,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:10,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:10,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068611546] [2021-06-05 06:25:10,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068611546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:10,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802128447] [2021-06-05 06:25:10,902 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:10,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:25:10,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:10,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:25:10,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:11,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:11,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-06-05 06:25:11,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:11,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:11,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:25:11,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:188 [2021-06-05 06:25:12,061 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 06:25:12,912 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 06:25:13,166 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2021-06-05 06:25:13,421 INFO L446 ElimStorePlain]: Different costs {1=[q2, v_prenex_71, v_prenex_53, v_prenex_74, v_prenex_62, v_prenex_68, v_prenex_56, v_prenex_77], 3=[v_prenex_83, v_prenex_80, v_prenex_65, v_prenex_86, v_prenex_59]} [2021-06-05 06:25:13,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:13,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:25:13,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:13,714 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2021-06-05 06:25:13,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:13,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:13,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-06-05 06:25:13,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:13,941 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2021-06-05 06:25:13,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:13,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:13,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-06-05 06:25:13,957 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:14,162 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2021-06-05 06:25:14,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:14,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:14,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-06-05 06:25:14,176 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:14,374 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2021-06-05 06:25:14,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:14,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:14,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:25:14,387 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:14,587 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2021-06-05 06:25:14,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:14,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:14,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-06-05 06:25:14,601 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:14,790 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2021-06-05 06:25:14,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:14,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:14,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-06-05 06:25:14,808 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:14,986 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2021-06-05 06:25:14,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:14,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:15,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-06-05 06:25:15,001 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:15,177 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2021-06-05 06:25:15,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:15,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:15,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:15,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:15,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:25:15,193 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:15,359 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-05 06:25:15,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:15,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:15,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:15,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:25:15,373 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:15,534 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-05 06:25:15,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:15,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:15,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:15,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:25:15,548 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:15,701 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-05 06:25:15,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:15,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:15,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:15,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-06-05 06:25:15,714 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:15,862 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-05 06:25:15,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:15,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:15,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:15,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:15,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-06-05 06:25:15,876 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:16,014 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 06:25:16,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:16,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 31 dim-0 vars, 13 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 06:25:16,026 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 44 variables, input treesize:660, output treesize:263 [2021-06-05 06:25:16,382 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_91, v_prenex_90], 3=[v_prenex_94, q1], 6=[v_prenex_93, v_prenex_92, v_prenex_89]} [2021-06-05 06:25:16,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:16,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:25:16,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:16,621 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2021-06-05 06:25:16,622 INFO L628 ElimStorePlain]: treesize reduction 33, result has 90.7 percent of original size [2021-06-05 06:25:16,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:16,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:25:16,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:16,817 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-06-05 06:25:16,818 INFO L628 ElimStorePlain]: treesize reduction 42, result has 86.5 percent of original size [2021-06-05 06:25:16,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:16,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:16,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 32 [2021-06-05 06:25:16,839 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:16,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:16,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:16,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:16,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 32 [2021-06-05 06:25:16,937 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:17,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:17,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:17,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:17,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:17,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:17,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-06-05 06:25:17,035 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 06:25:17,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:17,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:17,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:17,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:17,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:17,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-06-05 06:25:17,134 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 06:25:17,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:17,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:17,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:17,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:17,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:17,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 45 [2021-06-05 06:25:17,228 INFO L550 ElimStorePlain]: Start of recursive call 8: 2 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:17,328 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-05 06:25:17,328 INFO L628 ElimStorePlain]: treesize reduction 64, result has 66.0 percent of original size [2021-06-05 06:25:17,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 7 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 06:25:17,332 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:367, output treesize:119 [2021-06-05 06:25:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:17,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802128447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:17,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:17,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:25:17,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116948546] [2021-06-05 06:25:17,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:25:17,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:17,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:25:17,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:25:17,469 INFO L87 Difference]: Start difference. First operand 43785 states and 181532 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:18,466 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 47 [2021-06-05 06:25:19,016 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 93 [2021-06-05 06:25:19,343 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 44 [2021-06-05 06:25:19,543 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 55 [2021-06-05 06:25:20,059 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2021-06-05 06:25:20,534 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 44 [2021-06-05 06:25:20,721 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2021-06-05 06:25:21,099 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-06-05 06:25:21,300 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 50 [2021-06-05 06:25:22,537 WARN L205 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 148 [2021-06-05 06:25:22,961 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-06-05 06:25:23,194 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-06-05 06:25:23,476 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-05 06:25:24,009 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 124 [2021-06-05 06:25:24,527 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-06-05 06:25:25,104 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 83 [2021-06-05 06:25:25,398 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-06-05 06:25:25,909 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2021-06-05 06:25:26,648 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 121 [2021-06-05 06:25:27,198 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 06:25:27,617 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 120 [2021-06-05 06:25:28,173 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 06:25:28,717 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-06-05 06:25:29,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:29,152 INFO L93 Difference]: Finished difference Result 73069 states and 297530 transitions. [2021-06-05 06:25:29,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:25:29,153 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:29,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:29,369 INFO L225 Difference]: With dead ends: 73069 [2021-06-05 06:25:29,369 INFO L226 Difference]: Without dead ends: 72920 [2021-06-05 06:25:29,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2580 ImplicationChecksByTransitivity, 11390.6ms TimeCoverageRelationStatistics Valid=1078, Invalid=7112, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 06:25:29,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72920 states. [2021-06-05 06:25:30,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72920 to 44157. [2021-06-05 06:25:30,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44157 states, 44156 states have (on average 4.145099193767551) internal successors, (183031), 44156 states have internal predecessors, (183031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:30,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44157 states to 44157 states and 183031 transitions. [2021-06-05 06:25:30,606 INFO L78 Accepts]: Start accepts. Automaton has 44157 states and 183031 transitions. Word has length 39 [2021-06-05 06:25:30,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:30,606 INFO L482 AbstractCegarLoop]: Abstraction has 44157 states and 183031 transitions. [2021-06-05 06:25:30,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:30,606 INFO L276 IsEmpty]: Start isEmpty. Operand 44157 states and 183031 transitions. [2021-06-05 06:25:30,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:30,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:30,697 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:30,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 06:25:30,899 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:30,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:30,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1535515861, now seen corresponding path program 60 times [2021-06-05 06:25:30,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:30,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672487452] [2021-06-05 06:25:30,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:31,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:31,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672487452] [2021-06-05 06:25:31,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672487452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:31,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370293348] [2021-06-05 06:25:31,170 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:31,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:25:31,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:31,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:25:31,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:31,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:31,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 06:25:31,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:31,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:31,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:31,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:56 [2021-06-05 06:25:31,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:31,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 29 [2021-06-05 06:25:31,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:31,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:31,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 06:25:31,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:31,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:31,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 06:25:31,648 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:31,653 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:25:31,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 06:25:31,654 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:31,703 INFO L628 ElimStorePlain]: treesize reduction 38, result has 67.0 percent of original size [2021-06-05 06:25:31,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:25:31,705 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:229, output treesize:73 [2021-06-05 06:25:31,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:31,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:25:31,785 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:31,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:31,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:31,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:25:31,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:31,887 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.1 percent of original size [2021-06-05 06:25:31,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:25:31,889 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:94, output treesize:76 [2021-06-05 06:25:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:32,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370293348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:32,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:32,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-06-05 06:25:32,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016825706] [2021-06-05 06:25:32,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:25:32,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:32,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:25:32,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:25:32,022 INFO L87 Difference]: Start difference. First operand 44157 states and 183031 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:33,536 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-06-05 06:25:34,413 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2021-06-05 06:25:34,656 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 06:25:34,874 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-06-05 06:25:36,199 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2021-06-05 06:25:36,669 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-06-05 06:25:36,991 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-05 06:25:37,591 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-05 06:25:38,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:38,394 INFO L93 Difference]: Finished difference Result 121401 states and 487585 transitions. [2021-06-05 06:25:38,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:25:38,395 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:38,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:39,435 INFO L225 Difference]: With dead ends: 121401 [2021-06-05 06:25:39,435 INFO L226 Difference]: Without dead ends: 121303 [2021-06-05 06:25:39,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2622 ImplicationChecksByTransitivity, 4962.4ms TimeCoverageRelationStatistics Valid=1340, Invalid=6316, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 06:25:39,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121303 states. [2021-06-05 06:25:41,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121303 to 44145. [2021-06-05 06:25:41,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44145 states, 44144 states have (on average 4.141718013773106) internal successors, (182832), 44144 states have internal predecessors, (182832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:41,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44145 states to 44145 states and 182832 transitions. [2021-06-05 06:25:41,493 INFO L78 Accepts]: Start accepts. Automaton has 44145 states and 182832 transitions. Word has length 39 [2021-06-05 06:25:41,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:41,493 INFO L482 AbstractCegarLoop]: Abstraction has 44145 states and 182832 transitions. [2021-06-05 06:25:41,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:41,493 INFO L276 IsEmpty]: Start isEmpty. Operand 44145 states and 182832 transitions. [2021-06-05 06:25:41,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:41,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:41,576 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:41,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:41,776 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:41,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:41,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1689999629, now seen corresponding path program 61 times [2021-06-05 06:25:41,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:41,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937913193] [2021-06-05 06:25:41,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:42,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:42,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937913193] [2021-06-05 06:25:42,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937913193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:42,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803346739] [2021-06-05 06:25:42,065 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:42,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:25:42,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:42,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:25:42,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:42,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:42,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:42,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 06:25:42,315 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:25:42,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:25:42,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:42,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:42,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:42,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 06:25:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:42,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803346739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:42,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:42,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:25:42,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047326826] [2021-06-05 06:25:42,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:25:42,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:42,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:25:42,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:25:42,380 INFO L87 Difference]: Start difference. First operand 44145 states and 182832 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:43,900 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-05 06:25:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:45,699 INFO L93 Difference]: Finished difference Result 133350 states and 541838 transitions. [2021-06-05 06:25:45,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:25:45,700 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:45,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:46,676 INFO L225 Difference]: With dead ends: 133350 [2021-06-05 06:25:46,677 INFO L226 Difference]: Without dead ends: 133295 [2021-06-05 06:25:46,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1807.5ms TimeCoverageRelationStatistics Valid=524, Invalid=2446, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:25:46,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133295 states. [2021-06-05 06:25:48,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133295 to 44007. [2021-06-05 06:25:48,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44007 states, 44006 states have (on average 4.144321228923329) internal successors, (182375), 44006 states have internal predecessors, (182375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44007 states to 44007 states and 182375 transitions. [2021-06-05 06:25:48,533 INFO L78 Accepts]: Start accepts. Automaton has 44007 states and 182375 transitions. Word has length 39 [2021-06-05 06:25:48,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:48,533 INFO L482 AbstractCegarLoop]: Abstraction has 44007 states and 182375 transitions. [2021-06-05 06:25:48,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 44007 states and 182375 transitions. [2021-06-05 06:25:48,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:48,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:48,611 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:48,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:48,811 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:48,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:48,812 INFO L82 PathProgramCache]: Analyzing trace with hash 541818871, now seen corresponding path program 62 times [2021-06-05 06:25:48,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:48,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210609636] [2021-06-05 06:25:48,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:49,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:49,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210609636] [2021-06-05 06:25:49,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210609636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:49,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241603279] [2021-06-05 06:25:49,114 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:49,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:25:49,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:49,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:25:49,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:49,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:25:49,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:49,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:49,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:49,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 06:25:49,407 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:25:49,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:25:49,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:49,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:49,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:49,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:25:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:49,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241603279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:49,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:49,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:25:49,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532881344] [2021-06-05 06:25:49,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:25:49,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:49,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:25:49,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:25:49,454 INFO L87 Difference]: Start difference. First operand 44007 states and 182375 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:25:51,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:51,625 INFO L93 Difference]: Finished difference Result 87410 states and 359253 transitions. [2021-06-05 06:25:51,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:25:51,626 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:25:51,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:51,889 INFO L225 Difference]: With dead ends: 87410 [2021-06-05 06:25:51,889 INFO L226 Difference]: Without dead ends: 87355 [2021-06-05 06:25:51,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1313.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:25:52,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87355 states. [2021-06-05 06:25:53,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87355 to 43555. [2021-06-05 06:25:53,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43555 states, 43554 states have (on average 4.145864903338385) internal successors, (180569), 43554 states have internal predecessors, (180569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:53,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43555 states to 43555 states and 180569 transitions. [2021-06-05 06:25:53,453 INFO L78 Accepts]: Start accepts. Automaton has 43555 states and 180569 transitions. Word has length 39 [2021-06-05 06:25:53,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:53,453 INFO L482 AbstractCegarLoop]: Abstraction has 43555 states and 180569 transitions. [2021-06-05 06:25:53,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:25:53,453 INFO L276 IsEmpty]: Start isEmpty. Operand 43555 states and 180569 transitions. [2021-06-05 06:25:53,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:53,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:53,535 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:53,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 06:25:53,736 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:53,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:53,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1810207527, now seen corresponding path program 63 times [2021-06-05 06:25:53,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:53,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420505464] [2021-06-05 06:25:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:54,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:54,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420505464] [2021-06-05 06:25:54,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420505464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:54,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419218303] [2021-06-05 06:25:54,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:54,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:25:54,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:54,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:25:54,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:54,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:54,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:54,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-06-05 06:25:54,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:54,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:54,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:54,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:109 [2021-06-05 06:25:55,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:55,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:55,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:25:55,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:55,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:55,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:55,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:9 [2021-06-05 06:25:55,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:55,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:25:55,087 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:55,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:55,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:55,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:25:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:55,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419218303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:55,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:55,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:25:55,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588723423] [2021-06-05 06:25:55,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:25:55,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:55,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:25:55,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:25:55,155 INFO L87 Difference]: Start difference. First operand 43555 states and 180569 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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) [2021-06-05 06:25:58,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:58,930 INFO L93 Difference]: Finished difference Result 74741 states and 304515 transitions. [2021-06-05 06:25:58,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:25:58,930 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 39 [2021-06-05 06:25:58,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:59,179 INFO L225 Difference]: With dead ends: 74741 [2021-06-05 06:25:59,179 INFO L226 Difference]: Without dead ends: 74548 [2021-06-05 06:25:59,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 2952.6ms TimeCoverageRelationStatistics Valid=746, Invalid=4656, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 06:25:59,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74548 states. [2021-06-05 06:26:00,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74548 to 44107. [2021-06-05 06:26:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44107 states, 44106 states have (on average 4.139346120709201) internal successors, (182570), 44106 states have internal predecessors, (182570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:00,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44107 states to 44107 states and 182570 transitions. [2021-06-05 06:26:00,344 INFO L78 Accepts]: Start accepts. Automaton has 44107 states and 182570 transitions. Word has length 39 [2021-06-05 06:26:00,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:00,344 INFO L482 AbstractCegarLoop]: Abstraction has 44107 states and 182570 transitions. [2021-06-05 06:26:00,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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) [2021-06-05 06:26:00,344 INFO L276 IsEmpty]: Start isEmpty. Operand 44107 states and 182570 transitions. [2021-06-05 06:26:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:00,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:00,425 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:00,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 06:26:00,626 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:00,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:00,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1423700779, now seen corresponding path program 64 times [2021-06-05 06:26:00,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:00,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951211700] [2021-06-05 06:26:00,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:01,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:01,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951211700] [2021-06-05 06:26:01,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951211700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:01,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521291123] [2021-06-05 06:26:01,024 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:01,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:26:01,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:01,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:26:01,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:01,280 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:26:01,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:26:01,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:01,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:01,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:01,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 06:26:01,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:26:01,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:01,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:01,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:01,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:26:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:01,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521291123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:01,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:01,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:26:01,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479874030] [2021-06-05 06:26:01,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:26:01,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:01,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:26:01,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:26:01,399 INFO L87 Difference]: Start difference. First operand 44107 states and 182570 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:26:01,830 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-05 06:26:04,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:04,700 INFO L93 Difference]: Finished difference Result 91988 states and 374364 transitions. [2021-06-05 06:26:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:26:04,701 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:26:04,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:04,967 INFO L225 Difference]: With dead ends: 91988 [2021-06-05 06:26:04,967 INFO L226 Difference]: Without dead ends: 91764 [2021-06-05 06:26:04,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1992.6ms TimeCoverageRelationStatistics Valid=478, Invalid=2714, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:26:05,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91764 states. [2021-06-05 06:26:06,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91764 to 43885. [2021-06-05 06:26:06,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43885 states, 43884 states have (on average 4.1429450369155045) internal successors, (181809), 43884 states have internal predecessors, (181809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:06,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43885 states to 43885 states and 181809 transitions. [2021-06-05 06:26:06,378 INFO L78 Accepts]: Start accepts. Automaton has 43885 states and 181809 transitions. Word has length 39 [2021-06-05 06:26:06,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:06,378 INFO L482 AbstractCegarLoop]: Abstraction has 43885 states and 181809 transitions. [2021-06-05 06:26:06,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:26:06,378 INFO L276 IsEmpty]: Start isEmpty. Operand 43885 states and 181809 transitions. [2021-06-05 06:26:06,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:06,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:06,463 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:06,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:06,664 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:06,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:06,664 INFO L82 PathProgramCache]: Analyzing trace with hash 206878525, now seen corresponding path program 65 times [2021-06-05 06:26:06,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:06,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267765548] [2021-06-05 06:26:06,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:07,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:07,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267765548] [2021-06-05 06:26:07,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267765548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:07,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37551707] [2021-06-05 06:26:07,008 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:07,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:26:07,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:07,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 06:26:07,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:07,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:07,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 06:26:07,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:07,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:07,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:26:07,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:69, output treesize:68 [2021-06-05 06:26:07,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:07,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:26:07,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:26:07,644 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 06:26:07,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 41 [2021-06-05 06:26:07,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:07,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:07,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:26:07,669 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:07,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:07,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 06:26:07,761 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:171, output treesize:101 [2021-06-05 06:26:07,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:07,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:07,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:07,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:07,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 06:26:07,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:26:07,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:07,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:07,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 06:26:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:08,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37551707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:08,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:08,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:26:08,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534213042] [2021-06-05 06:26:08,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:26:08,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:08,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:26:08,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:26:08,035 INFO L87 Difference]: Start difference. First operand 43885 states and 181809 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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) [2021-06-05 06:26:09,510 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2021-06-05 06:26:09,938 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 72 [2021-06-05 06:26:10,113 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2021-06-05 06:26:12,312 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-05 06:26:16,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:16,499 INFO L93 Difference]: Finished difference Result 107672 states and 437153 transitions. [2021-06-05 06:26:16,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 06:26:16,500 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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 39 [2021-06-05 06:26:16,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:16,840 INFO L225 Difference]: With dead ends: 107672 [2021-06-05 06:26:16,840 INFO L226 Difference]: Without dead ends: 107189 [2021-06-05 06:26:16,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 5337.5ms TimeCoverageRelationStatistics Valid=1456, Invalid=9464, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 06:26:16,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107189 states. [2021-06-05 06:26:18,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107189 to 44125. [2021-06-05 06:26:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44125 states, 44124 states have (on average 4.141079684525429) internal successors, (182721), 44124 states have internal predecessors, (182721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:18,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44125 states to 44125 states and 182721 transitions. [2021-06-05 06:26:18,393 INFO L78 Accepts]: Start accepts. Automaton has 44125 states and 182721 transitions. Word has length 39 [2021-06-05 06:26:18,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:18,393 INFO L482 AbstractCegarLoop]: Abstraction has 44125 states and 182721 transitions. [2021-06-05 06:26:18,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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) [2021-06-05 06:26:18,394 INFO L276 IsEmpty]: Start isEmpty. Operand 44125 states and 182721 transitions. [2021-06-05 06:26:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:18,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:18,478 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:18,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:18,690 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:18,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:18,691 INFO L82 PathProgramCache]: Analyzing trace with hash 410799271, now seen corresponding path program 66 times [2021-06-05 06:26:18,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:18,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870123002] [2021-06-05 06:26:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:19,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:19,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870123002] [2021-06-05 06:26:19,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870123002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:19,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980743158] [2021-06-05 06:26:19,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:19,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:26:19,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:19,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 06:26:19,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:19,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:26:19,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:19,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:19,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:26:19,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:34 [2021-06-05 06:26:19,505 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:26:19,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 06:26:19,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:19,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:19,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:19,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:9 [2021-06-05 06:26:19,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:19,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:26:19,550 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:19,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:19,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:19,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:26:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:19,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980743158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:19,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:19,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:26:19,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535596697] [2021-06-05 06:26:19,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:26:19,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:19,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:26:19,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:26:19,629 INFO L87 Difference]: Start difference. First operand 44125 states and 182721 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2021-06-05 06:26:23,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:23,421 INFO L93 Difference]: Finished difference Result 76655 states and 312209 transitions. [2021-06-05 06:26:23,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:26:23,421 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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 39 [2021-06-05 06:26:23,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:23,642 INFO L225 Difference]: With dead ends: 76655 [2021-06-05 06:26:23,642 INFO L226 Difference]: Without dead ends: 76475 [2021-06-05 06:26:23,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 2034.4ms TimeCoverageRelationStatistics Valid=582, Invalid=3078, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:26:23,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76475 states. [2021-06-05 06:26:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76475 to 44279. [2021-06-05 06:26:24,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44279 states, 44278 states have (on average 4.140227652558833) internal successors, (183321), 44278 states have internal predecessors, (183321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:24,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44279 states to 44279 states and 183321 transitions. [2021-06-05 06:26:24,984 INFO L78 Accepts]: Start accepts. Automaton has 44279 states and 183321 transitions. Word has length 39 [2021-06-05 06:26:24,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:24,984 INFO L482 AbstractCegarLoop]: Abstraction has 44279 states and 183321 transitions. [2021-06-05 06:26:24,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2021-06-05 06:26:24,985 INFO L276 IsEmpty]: Start isEmpty. Operand 44279 states and 183321 transitions. [2021-06-05 06:26:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:25,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:25,076 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:25,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 06:26:25,276 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:25,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:25,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1186962653, now seen corresponding path program 67 times [2021-06-05 06:26:25,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:25,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252204691] [2021-06-05 06:26:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:25,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:25,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252204691] [2021-06-05 06:26:25,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252204691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:25,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943565031] [2021-06-05 06:26:25,632 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:25,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:26:25,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:25,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:26:25,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:25,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:25,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:25,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:26:25,932 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:26:25,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:26:25,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:25,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:25,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:25,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:26:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:25,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943565031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:25,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:25,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:26:25,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923732040] [2021-06-05 06:26:25,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:26:25,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:25,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:26:25,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:26:25,982 INFO L87 Difference]: Start difference. First operand 44279 states and 183321 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:26:29,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:29,805 INFO L93 Difference]: Finished difference Result 110930 states and 450910 transitions. [2021-06-05 06:26:29,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:26:29,805 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:26:29,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:30,179 INFO L225 Difference]: With dead ends: 110930 [2021-06-05 06:26:30,179 INFO L226 Difference]: Without dead ends: 110794 [2021-06-05 06:26:30,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 1658.1ms TimeCoverageRelationStatistics Valid=586, Invalid=3074, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:26:30,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110794 states. [2021-06-05 06:26:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110794 to 44119. [2021-06-05 06:26:31,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44119 states, 44118 states have (on average 4.142005530622422) internal successors, (182737), 44118 states have internal predecessors, (182737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44119 states to 44119 states and 182737 transitions. [2021-06-05 06:26:31,710 INFO L78 Accepts]: Start accepts. Automaton has 44119 states and 182737 transitions. Word has length 39 [2021-06-05 06:26:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:31,710 INFO L482 AbstractCegarLoop]: Abstraction has 44119 states and 182737 transitions. [2021-06-05 06:26:31,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:26:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 44119 states and 182737 transitions. [2021-06-05 06:26:31,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:31,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:31,796 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:31,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-06-05 06:26:31,997 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:31,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:31,997 INFO L82 PathProgramCache]: Analyzing trace with hash -303471491, now seen corresponding path program 68 times [2021-06-05 06:26:31,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:31,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226266540] [2021-06-05 06:26:31,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:32,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:32,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226266540] [2021-06-05 06:26:32,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226266540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:32,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873408515] [2021-06-05 06:26:32,344 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:32,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:26:32,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:32,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:26:32,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:32,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:26:32,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:32,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:32,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:32,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:26:32,631 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:26:32,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:26:32,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:32,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:32,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:32,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:26:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:32,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873408515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:32,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:32,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:26:32,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742027775] [2021-06-05 06:26:32,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:26:32,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:32,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:26:32,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:26:32,692 INFO L87 Difference]: Start difference. First operand 44119 states and 182737 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:26:35,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:35,279 INFO L93 Difference]: Finished difference Result 98998 states and 403959 transitions. [2021-06-05 06:26:35,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:26:35,279 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:26:35,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:35,612 INFO L225 Difference]: With dead ends: 98998 [2021-06-05 06:26:35,612 INFO L226 Difference]: Without dead ends: 98830 [2021-06-05 06:26:35,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1374.0ms TimeCoverageRelationStatistics Valid=402, Invalid=2354, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:26:35,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98830 states. [2021-06-05 06:26:37,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98830 to 44205. [2021-06-05 06:26:37,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44205 states, 44204 states have (on average 4.143177088046331) internal successors, (183145), 44204 states have internal predecessors, (183145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:37,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44205 states to 44205 states and 183145 transitions. [2021-06-05 06:26:37,402 INFO L78 Accepts]: Start accepts. Automaton has 44205 states and 183145 transitions. Word has length 39 [2021-06-05 06:26:37,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:37,402 INFO L482 AbstractCegarLoop]: Abstraction has 44205 states and 183145 transitions. [2021-06-05 06:26:37,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:26:37,402 INFO L276 IsEmpty]: Start isEmpty. Operand 44205 states and 183145 transitions. [2021-06-05 06:26:37,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:37,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:37,901 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:38,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:38,117 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:38,117 INFO L82 PathProgramCache]: Analyzing trace with hash -577377603, now seen corresponding path program 69 times [2021-06-05 06:26:38,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:38,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356616115] [2021-06-05 06:26:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:38,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:38,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356616115] [2021-06-05 06:26:38,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356616115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:38,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461666656] [2021-06-05 06:26:38,432 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:38,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:26:38,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:38,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:26:38,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:38,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:26:38,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:38,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:38,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:38,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-06-05 06:26:38,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:38,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:38,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 06:26:38,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:38,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:38,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:26:38,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:75 [2021-06-05 06:26:38,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:38,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:26:38,823 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:38,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:38,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:38,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:26:38,851 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:38,885 INFO L628 ElimStorePlain]: treesize reduction 10, result has 82.1 percent of original size [2021-06-05 06:26:38,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:26:38,887 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-06-05 06:26:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:38,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461666656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:38,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:38,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:26:38,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3163100] [2021-06-05 06:26:38,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:26:38,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:38,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:26:38,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:26:38,983 INFO L87 Difference]: Start difference. First operand 44205 states and 183145 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:26:44,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:44,567 INFO L93 Difference]: Finished difference Result 105841 states and 429038 transitions. [2021-06-05 06:26:44,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 06:26:44,568 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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 39 [2021-06-05 06:26:44,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:44,910 INFO L225 Difference]: With dead ends: 105841 [2021-06-05 06:26:44,910 INFO L226 Difference]: Without dead ends: 105588 [2021-06-05 06:26:44,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2835 ImplicationChecksByTransitivity, 3864.9ms TimeCoverageRelationStatistics Valid=1347, Invalid=7209, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 06:26:45,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105588 states. [2021-06-05 06:26:46,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105588 to 44569. [2021-06-05 06:26:46,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44569 states, 44568 states have (on average 4.14333153832346) internal successors, (184660), 44568 states have internal predecessors, (184660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44569 states to 44569 states and 184660 transitions. [2021-06-05 06:26:46,496 INFO L78 Accepts]: Start accepts. Automaton has 44569 states and 184660 transitions. Word has length 39 [2021-06-05 06:26:46,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:46,496 INFO L482 AbstractCegarLoop]: Abstraction has 44569 states and 184660 transitions. [2021-06-05 06:26:46,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:26:46,496 INFO L276 IsEmpty]: Start isEmpty. Operand 44569 states and 184660 transitions. [2021-06-05 06:26:46,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:46,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:46,581 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:46,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:46,781 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:46,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:46,782 INFO L82 PathProgramCache]: Analyzing trace with hash 171718673, now seen corresponding path program 70 times [2021-06-05 06:26:46,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:46,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008044311] [2021-06-05 06:26:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:47,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:47,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008044311] [2021-06-05 06:26:47,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008044311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:47,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218081048] [2021-06-05 06:26:47,166 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:47,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:26:47,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:47,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:26:47,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:47,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:26:47,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:47,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:47,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:47,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:26:47,462 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:26:47,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:26:47,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:47,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:47,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:47,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:26:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:47,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218081048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:47,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:47,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:26:47,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798513076] [2021-06-05 06:26:47,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:26:47,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:47,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:26:47,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:26:47,505 INFO L87 Difference]: Start difference. First operand 44569 states and 184660 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:49,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:49,603 INFO L93 Difference]: Finished difference Result 84744 states and 347051 transitions. [2021-06-05 06:26:49,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:26:49,604 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 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 39 [2021-06-05 06:26:49,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:49,848 INFO L225 Difference]: With dead ends: 84744 [2021-06-05 06:26:49,849 INFO L226 Difference]: Without dead ends: 84670 [2021-06-05 06:26:49,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1092.4ms TimeCoverageRelationStatistics Valid=293, Invalid=1599, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:26:49,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84670 states. [2021-06-05 06:26:51,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84670 to 44139. [2021-06-05 06:26:51,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44139 states, 44138 states have (on average 4.1429833703384835) internal successors, (182863), 44138 states have internal predecessors, (182863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44139 states to 44139 states and 182863 transitions. [2021-06-05 06:26:51,353 INFO L78 Accepts]: Start accepts. Automaton has 44139 states and 182863 transitions. Word has length 39 [2021-06-05 06:26:51,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:51,353 INFO L482 AbstractCegarLoop]: Abstraction has 44139 states and 182863 transitions. [2021-06-05 06:26:51,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 44139 states and 182863 transitions. [2021-06-05 06:26:51,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:51,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:51,437 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:51,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:51,641 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:51,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:51,641 INFO L82 PathProgramCache]: Analyzing trace with hash -388199381, now seen corresponding path program 71 times [2021-06-05 06:26:51,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:51,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912753871] [2021-06-05 06:26:51,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:52,017 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-06-05 06:26:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:52,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:52,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912753871] [2021-06-05 06:26:52,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912753871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:52,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419124588] [2021-06-05 06:26:52,321 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:52,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:26:52,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:52,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:26:52,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:52,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:26:52,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:52,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:52,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:26:52,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:41 [2021-06-05 06:26:52,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:52,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:52,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-06-05 06:26:52,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:52,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:52,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:52,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:24 [2021-06-05 06:26:52,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:52,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:52,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:52,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:52,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-06-05 06:26:52,728 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:52,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:52,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:52,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-06-05 06:26:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:52,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419124588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:52,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:52,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:26:52,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823670049] [2021-06-05 06:26:52,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:26:52,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:52,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:26:52,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:26:52,833 INFO L87 Difference]: Start difference. First operand 44139 states and 182863 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:26:58,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:58,911 INFO L93 Difference]: Finished difference Result 120260 states and 495913 transitions. [2021-06-05 06:26:58,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 06:26:58,911 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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 39 [2021-06-05 06:26:58,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:59,304 INFO L225 Difference]: With dead ends: 120260 [2021-06-05 06:26:59,304 INFO L226 Difference]: Without dead ends: 120069 [2021-06-05 06:26:59,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3105 ImplicationChecksByTransitivity, 4422.7ms TimeCoverageRelationStatistics Valid=1341, Invalid=7971, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 06:26:59,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120069 states. [2021-06-05 06:27:00,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120069 to 44403. [2021-06-05 06:27:00,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44403 states, 44402 states have (on average 4.143281834151614) internal successors, (183970), 44402 states have internal predecessors, (183970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:01,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44403 states to 44403 states and 183970 transitions. [2021-06-05 06:27:01,009 INFO L78 Accepts]: Start accepts. Automaton has 44403 states and 183970 transitions. Word has length 39 [2021-06-05 06:27:01,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:01,009 INFO L482 AbstractCegarLoop]: Abstraction has 44403 states and 183970 transitions. [2021-06-05 06:27:01,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:27:01,009 INFO L276 IsEmpty]: Start isEmpty. Operand 44403 states and 183970 transitions. [2021-06-05 06:27:01,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:01,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:01,094 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:01,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-06-05 06:27:01,297 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:01,297 INFO L82 PathProgramCache]: Analyzing trace with hash 249071557, now seen corresponding path program 72 times [2021-06-05 06:27:01,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:01,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818943981] [2021-06-05 06:27:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:01,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:01,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818943981] [2021-06-05 06:27:01,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818943981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:01,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732836964] [2021-06-05 06:27:01,677 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:01,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:27:01,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:01,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:27:01,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:02,324 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 06:27:02,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:02,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:02,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:27:02,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:02,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:02,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:02,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:35 [2021-06-05 06:27:02,646 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:27:02,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:27:02,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:02,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:02,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:02,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-06-05 06:27:02,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:02,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:27:02,706 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:02,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:02,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:02,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:27:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:02,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732836964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:02,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:02,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:27:02,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133095855] [2021-06-05 06:27:02,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:27:02,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:02,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:27:02,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:27:02,764 INFO L87 Difference]: Start difference. First operand 44403 states and 183970 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:05,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:05,965 INFO L93 Difference]: Finished difference Result 85874 states and 347865 transitions. [2021-06-05 06:27:05,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:27:05,965 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:27:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:06,224 INFO L225 Difference]: With dead ends: 85874 [2021-06-05 06:27:06,225 INFO L226 Difference]: Without dead ends: 85722 [2021-06-05 06:27:06,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 2562.7ms TimeCoverageRelationStatistics Valid=687, Invalid=3869, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:27:06,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85722 states. [2021-06-05 06:27:07,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85722 to 44645. [2021-06-05 06:27:07,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44645 states, 44644 states have (on average 4.1416315742317) internal successors, (184899), 44644 states have internal predecessors, (184899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:07,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44645 states to 44645 states and 184899 transitions. [2021-06-05 06:27:07,621 INFO L78 Accepts]: Start accepts. Automaton has 44645 states and 184899 transitions. Word has length 39 [2021-06-05 06:27:07,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:07,621 INFO L482 AbstractCegarLoop]: Abstraction has 44645 states and 184899 transitions. [2021-06-05 06:27:07,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:07,621 INFO L276 IsEmpty]: Start isEmpty. Operand 44645 states and 184899 transitions. [2021-06-05 06:27:07,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:07,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:07,708 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:07,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:07,909 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:07,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:07,909 INFO L82 PathProgramCache]: Analyzing trace with hash -653921383, now seen corresponding path program 73 times [2021-06-05 06:27:07,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:07,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136402606] [2021-06-05 06:27:07,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:08,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:08,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136402606] [2021-06-05 06:27:08,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136402606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:08,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099090200] [2021-06-05 06:27:08,325 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:08,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:27:08,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:08,557 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:27:08,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:27:08,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:08,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:08,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:08,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 06:27:08,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:27:08,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:08,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:08,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:08,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:27:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:08,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099090200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:08,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:08,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:27:08,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572207147] [2021-06-05 06:27:08,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:27:08,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:08,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:27:08,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:27:08,677 INFO L87 Difference]: Start difference. First operand 44645 states and 184899 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:27:10,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:10,760 INFO L93 Difference]: Finished difference Result 73252 states and 300101 transitions. [2021-06-05 06:27:10,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:27:10,760 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:27:10,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:10,982 INFO L225 Difference]: With dead ends: 73252 [2021-06-05 06:27:10,982 INFO L226 Difference]: Without dead ends: 73060 [2021-06-05 06:27:10,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1143.9ms TimeCoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:27:11,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73060 states. [2021-06-05 06:27:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73060 to 44697. [2021-06-05 06:27:12,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44697 states, 44696 states have (on average 4.140885090388402) internal successors, (185081), 44696 states have internal predecessors, (185081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:12,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44697 states to 44697 states and 185081 transitions. [2021-06-05 06:27:12,302 INFO L78 Accepts]: Start accepts. Automaton has 44697 states and 185081 transitions. Word has length 39 [2021-06-05 06:27:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:12,303 INFO L482 AbstractCegarLoop]: Abstraction has 44697 states and 185081 transitions. [2021-06-05 06:27:12,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:27:12,303 INFO L276 IsEmpty]: Start isEmpty. Operand 44697 states and 185081 transitions. [2021-06-05 06:27:12,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:12,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:12,392 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:12,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 06:27:12,593 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:12,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:12,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1495860655, now seen corresponding path program 74 times [2021-06-05 06:27:12,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:12,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001615506] [2021-06-05 06:27:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:13,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:13,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001615506] [2021-06-05 06:27:13,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001615506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:13,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209894342] [2021-06-05 06:27:13,323 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:13,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:27:13,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:13,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:27:13,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:13,587 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:27:13,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:27:13,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:13,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:13,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:13,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 06:27:13,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:27:13,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:13,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:13,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:13,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:27:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:13,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209894342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:13,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:13,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:27:13,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108761163] [2021-06-05 06:27:13,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:27:13,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:13,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:27:13,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:27:13,677 INFO L87 Difference]: Start difference. First operand 44697 states and 185081 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:27:15,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:15,747 INFO L93 Difference]: Finished difference Result 74429 states and 304617 transitions. [2021-06-05 06:27:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:27:15,747 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:27:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:15,975 INFO L225 Difference]: With dead ends: 74429 [2021-06-05 06:27:15,975 INFO L226 Difference]: Without dead ends: 74181 [2021-06-05 06:27:15,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1186.7ms TimeCoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:27:16,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74181 states. [2021-06-05 06:27:17,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74181 to 44883. [2021-06-05 06:27:17,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44883 states, 44882 states have (on average 4.139320885878526) internal successors, (185781), 44882 states have internal predecessors, (185781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:17,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44883 states to 44883 states and 185781 transitions. [2021-06-05 06:27:17,316 INFO L78 Accepts]: Start accepts. Automaton has 44883 states and 185781 transitions. Word has length 39 [2021-06-05 06:27:17,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:17,316 INFO L482 AbstractCegarLoop]: Abstraction has 44883 states and 185781 transitions. [2021-06-05 06:27:17,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:27:17,317 INFO L276 IsEmpty]: Start isEmpty. Operand 44883 states and 185781 transitions. [2021-06-05 06:27:17,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:17,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:17,404 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:17,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 06:27:17,605 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:17,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:17,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1172159941, now seen corresponding path program 75 times [2021-06-05 06:27:17,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:17,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300947724] [2021-06-05 06:27:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:17,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:17,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300947724] [2021-06-05 06:27:17,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300947724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:17,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631366022] [2021-06-05 06:27:17,958 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:17,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:27:17,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:17,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:27:17,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:18,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:18,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:18,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:27:18,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:18,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:18,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:27:18,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:78 [2021-06-05 06:27:18,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:18,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:18,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-06-05 06:27:18,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:18,496 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:27:18,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:27:18,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:18,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:18,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:18,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-06-05 06:27:18,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:18,523 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:27:18,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-06-05 06:27:18,524 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:18,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:18,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 06:27:18,610 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:231, output treesize:206 [2021-06-05 06:27:18,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:18,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:27:18,825 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:18,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:18,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:18,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-05 06:27:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:18,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631366022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:18,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:18,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:27:18,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125167235] [2021-06-05 06:27:18,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:27:18,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:18,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:27:18,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:27:18,938 INFO L87 Difference]: Start difference. First operand 44883 states and 185781 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:19,776 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2021-06-05 06:27:23,231 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-06-05 06:27:23,454 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-06-05 06:27:23,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:23,905 INFO L93 Difference]: Finished difference Result 91301 states and 369112 transitions. [2021-06-05 06:27:23,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:27:23,905 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:27:23,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:24,180 INFO L225 Difference]: With dead ends: 91301 [2021-06-05 06:27:24,180 INFO L226 Difference]: Without dead ends: 90975 [2021-06-05 06:27:24,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 4160.0ms TimeCoverageRelationStatistics Valid=1220, Invalid=4480, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 06:27:24,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90975 states. [2021-06-05 06:27:25,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90975 to 44829. [2021-06-05 06:27:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44829 states, 44828 states have (on average 4.139756402248595) internal successors, (185577), 44828 states have internal predecessors, (185577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44829 states to 44829 states and 185577 transitions. [2021-06-05 06:27:25,648 INFO L78 Accepts]: Start accepts. Automaton has 44829 states and 185577 transitions. Word has length 39 [2021-06-05 06:27:25,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:25,648 INFO L482 AbstractCegarLoop]: Abstraction has 44829 states and 185577 transitions. [2021-06-05 06:27:25,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:25,648 INFO L276 IsEmpty]: Start isEmpty. Operand 44829 states and 185577 transitions. [2021-06-05 06:27:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:25,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:25,736 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:25,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 06:27:25,937 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:25,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:25,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1376080687, now seen corresponding path program 76 times [2021-06-05 06:27:25,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:25,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626065958] [2021-06-05 06:27:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:26,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:26,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626065958] [2021-06-05 06:27:26,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626065958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:26,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432203718] [2021-06-05 06:27:26,299 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:26,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:27:26,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:26,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:27:26,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:26,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:27:26,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:26,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:26,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:26,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:27:26,620 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:27:26,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:27:26,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:26,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:26,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:26,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:27:27,007 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 06:27:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:27,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432203718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:27,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:27,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:27:27,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605167603] [2021-06-05 06:27:27,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:27:27,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:27,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:27:27,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:27:27,032 INFO L87 Difference]: Start difference. First operand 44829 states and 185577 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:27:28,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:28,589 INFO L93 Difference]: Finished difference Result 78132 states and 319558 transitions. [2021-06-05 06:27:28,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:27:28,590 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:27:28,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:28,831 INFO L225 Difference]: With dead ends: 78132 [2021-06-05 06:27:28,831 INFO L226 Difference]: Without dead ends: 78042 [2021-06-05 06:27:28,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1052.3ms TimeCoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:27:28,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78042 states. [2021-06-05 06:27:30,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78042 to 44945. [2021-06-05 06:27:30,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44945 states, 44944 states have (on average 4.140107689569242) internal successors, (186073), 44944 states have internal predecessors, (186073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:30,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44945 states to 44945 states and 186073 transitions. [2021-06-05 06:27:30,212 INFO L78 Accepts]: Start accepts. Automaton has 44945 states and 186073 transitions. Word has length 39 [2021-06-05 06:27:30,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:30,212 INFO L482 AbstractCegarLoop]: Abstraction has 44945 states and 186073 transitions. [2021-06-05 06:27:30,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:27:30,212 INFO L276 IsEmpty]: Start isEmpty. Operand 44945 states and 186073 transitions. [2021-06-05 06:27:30,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:30,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:30,298 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:30,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:30,498 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:30,499 INFO L82 PathProgramCache]: Analyzing trace with hash -755570769, now seen corresponding path program 77 times [2021-06-05 06:27:30,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:30,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825501796] [2021-06-05 06:27:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:31,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:31,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825501796] [2021-06-05 06:27:31,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825501796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:31,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295460693] [2021-06-05 06:27:31,203 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:31,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:27:31,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:31,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:27:31,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:31,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:27:31,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:31,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:31,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:27:31,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:48 [2021-06-05 06:27:31,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:31,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:31,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:31,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:31,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-06-05 06:27:31,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:27:31,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:31,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:27:31,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:37 [2021-06-05 06:27:31,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:31,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:31,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:31,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:31,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 06:27:31,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:27:31,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:31,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:31,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 06:27:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:31,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295460693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:31,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:31,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:27:31,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884644944] [2021-06-05 06:27:31,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:27:31,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:31,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:27:31,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:27:31,803 INFO L87 Difference]: Start difference. First operand 44945 states and 186073 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:27:36,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:36,749 INFO L93 Difference]: Finished difference Result 122576 states and 498488 transitions. [2021-06-05 06:27:36,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 06:27:36,750 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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 39 [2021-06-05 06:27:36,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:37,525 INFO L225 Difference]: With dead ends: 122576 [2021-06-05 06:27:37,526 INFO L226 Difference]: Without dead ends: 122282 [2021-06-05 06:27:37,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 3384.5ms TimeCoverageRelationStatistics Valid=1048, Invalid=5272, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 06:27:37,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122282 states. [2021-06-05 06:27:39,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122282 to 44673. [2021-06-05 06:27:39,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44673 states, 44672 states have (on average 4.141229405444126) internal successors, (184997), 44672 states have internal predecessors, (184997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44673 states to 44673 states and 184997 transitions. [2021-06-05 06:27:39,252 INFO L78 Accepts]: Start accepts. Automaton has 44673 states and 184997 transitions. Word has length 39 [2021-06-05 06:27:39,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:39,252 INFO L482 AbstractCegarLoop]: Abstraction has 44673 states and 184997 transitions. [2021-06-05 06:27:39,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:27:39,253 INFO L276 IsEmpty]: Start isEmpty. Operand 44673 states and 184997 transitions. [2021-06-05 06:27:39,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:39,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:39,339 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:39,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:39,539 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:39,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:39,540 INFO L82 PathProgramCache]: Analyzing trace with hash 575171183, now seen corresponding path program 78 times [2021-06-05 06:27:39,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:39,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459167051] [2021-06-05 06:27:39,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:39,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:39,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459167051] [2021-06-05 06:27:39,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459167051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:39,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625896304] [2021-06-05 06:27:39,910 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:39,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:27:39,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:39,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 06:27:39,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:40,188 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:27:40,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:27:40,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:40,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:40,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:27:40,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:33 [2021-06-05 06:27:40,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 06:27:40,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:40,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:40,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:27:40,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:18 [2021-06-05 06:27:40,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:40,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-06-05 06:27:40,297 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:40,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:40,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:40,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-06-05 06:27:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:40,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625896304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:40,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:40,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:27:40,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381362768] [2021-06-05 06:27:40,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:27:40,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:40,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:27:40,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:27:40,357 INFO L87 Difference]: Start difference. First operand 44673 states and 184997 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2021-06-05 06:27:43,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:43,483 INFO L93 Difference]: Finished difference Result 86070 states and 352832 transitions. [2021-06-05 06:27:43,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:27:43,483 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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 39 [2021-06-05 06:27:43,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:43,753 INFO L225 Difference]: With dead ends: 86070 [2021-06-05 06:27:43,753 INFO L226 Difference]: Without dead ends: 85819 [2021-06-05 06:27:43,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1574.7ms TimeCoverageRelationStatistics Valid=471, Invalid=2285, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:27:44,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85819 states. [2021-06-05 06:27:45,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85819 to 45003. [2021-06-05 06:27:45,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45003 states, 45002 states have (on average 4.138416070396871) internal successors, (186237), 45002 states have internal predecessors, (186237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45003 states to 45003 states and 186237 transitions. [2021-06-05 06:27:45,790 INFO L78 Accepts]: Start accepts. Automaton has 45003 states and 186237 transitions. Word has length 39 [2021-06-05 06:27:45,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:45,791 INFO L482 AbstractCegarLoop]: Abstraction has 45003 states and 186237 transitions. [2021-06-05 06:27:45,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2021-06-05 06:27:45,791 INFO L276 IsEmpty]: Start isEmpty. Operand 45003 states and 186237 transitions. [2021-06-05 06:27:45,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:45,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:45,925 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:46,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:46,149 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:46,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:46,149 INFO L82 PathProgramCache]: Analyzing trace with hash 251470469, now seen corresponding path program 79 times [2021-06-05 06:27:46,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:46,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386813915] [2021-06-05 06:27:46,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:46,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:46,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386813915] [2021-06-05 06:27:46,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386813915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:46,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007505975] [2021-06-05 06:27:46,680 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:46,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:27:46,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:46,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:27:46,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:46,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:46,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:46,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:27:47,019 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:27:47,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:27:47,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:47,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:47,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:47,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:27:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:47,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007505975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:47,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:47,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:27:47,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310844498] [2021-06-05 06:27:47,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:27:47,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:47,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:27:47,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:27:47,067 INFO L87 Difference]: Start difference. First operand 45003 states and 186237 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:27:49,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:49,523 INFO L93 Difference]: Finished difference Result 92192 states and 375657 transitions. [2021-06-05 06:27:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:27:49,523 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:27:49,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:49,803 INFO L225 Difference]: With dead ends: 92192 [2021-06-05 06:27:49,803 INFO L226 Difference]: Without dead ends: 92040 [2021-06-05 06:27:49,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1405.1ms TimeCoverageRelationStatistics Valid=411, Invalid=2039, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:27:49,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92040 states. [2021-06-05 06:27:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92040 to 45083. [2021-06-05 06:27:51,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45083 states, 45082 states have (on average 4.138791535424338) internal successors, (186585), 45082 states have internal predecessors, (186585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:51,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45083 states to 45083 states and 186585 transitions. [2021-06-05 06:27:51,306 INFO L78 Accepts]: Start accepts. Automaton has 45083 states and 186585 transitions. Word has length 39 [2021-06-05 06:27:51,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:51,306 INFO L482 AbstractCegarLoop]: Abstraction has 45083 states and 186585 transitions. [2021-06-05 06:27:51,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:27:51,306 INFO L276 IsEmpty]: Start isEmpty. Operand 45083 states and 186585 transitions. [2021-06-05 06:27:51,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:51,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:51,394 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:51,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:51,594 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:51,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:51,595 INFO L82 PathProgramCache]: Analyzing trace with hash 455391215, now seen corresponding path program 80 times [2021-06-05 06:27:51,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:51,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971682981] [2021-06-05 06:27:51,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:51,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:51,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971682981] [2021-06-05 06:27:51,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971682981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:51,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009794654] [2021-06-05 06:27:51,956 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:51,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:27:51,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:51,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:27:51,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:52,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:27:52,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:52,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:52,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:52,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:27:52,240 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:27:52,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:27:52,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:52,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:52,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:52,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:27:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:52,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009794654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:52,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:52,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:27:52,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604053921] [2021-06-05 06:27:52,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:27:52,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:52,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:27:52,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:27:52,619 INFO L87 Difference]: Start difference. First operand 45083 states and 186585 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:27:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:54,236 INFO L93 Difference]: Finished difference Result 79399 states and 324786 transitions. [2021-06-05 06:27:54,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:27:54,237 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:27:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:54,478 INFO L225 Difference]: With dead ends: 79399 [2021-06-05 06:27:54,478 INFO L226 Difference]: Without dead ends: 79293 [2021-06-05 06:27:54,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1094.8ms TimeCoverageRelationStatistics Valid=351, Invalid=1455, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:27:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79293 states. [2021-06-05 06:27:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79293 to 44925. [2021-06-05 06:27:55,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44925 states, 44924 states have (on average 4.139324191968658) internal successors, (185955), 44924 states have internal predecessors, (185955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:55,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44925 states to 44925 states and 185955 transitions. [2021-06-05 06:27:55,921 INFO L78 Accepts]: Start accepts. Automaton has 44925 states and 185955 transitions. Word has length 39 [2021-06-05 06:27:55,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:55,922 INFO L482 AbstractCegarLoop]: Abstraction has 44925 states and 185955 transitions. [2021-06-05 06:27:55,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:27:55,922 INFO L276 IsEmpty]: Start isEmpty. Operand 44925 states and 185955 transitions. [2021-06-05 06:27:56,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:56,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:56,009 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:56,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:56,209 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:56,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:56,210 INFO L82 PathProgramCache]: Analyzing trace with hash -175003259, now seen corresponding path program 81 times [2021-06-05 06:27:56,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:56,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6675556] [2021-06-05 06:27:56,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:56,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:56,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6675556] [2021-06-05 06:27:56,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6675556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:56,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840295785] [2021-06-05 06:27:56,805 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:56,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:27:56,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:56,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:27:56,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:57,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:27:57,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:57,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:57,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:27:57,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:33 [2021-06-05 06:27:57,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:57,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:57,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-06-05 06:27:57,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:57,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:57,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 06:27:57,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:71 [2021-06-05 06:27:57,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:57,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:27:57,250 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:57,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:57,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:57,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:27:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:57,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840295785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:57,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:57,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:27:57,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238748126] [2021-06-05 06:27:57,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:27:57,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:57,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:27:57,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:27:57,306 INFO L87 Difference]: Start difference. First operand 44925 states and 185955 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:28:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:01,028 INFO L93 Difference]: Finished difference Result 91158 states and 369384 transitions. [2021-06-05 06:28:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 06:28:01,029 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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 39 [2021-06-05 06:28:01,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:01,316 INFO L225 Difference]: With dead ends: 91158 [2021-06-05 06:28:01,316 INFO L226 Difference]: Without dead ends: 90767 [2021-06-05 06:28:01,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 2747.2ms TimeCoverageRelationStatistics Valid=827, Invalid=4723, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 06:28:01,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90767 states. [2021-06-05 06:28:02,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90767 to 45055. [2021-06-05 06:28:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45055 states, 45054 states have (on average 4.138922182270164) internal successors, (186475), 45054 states have internal predecessors, (186475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:02,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45055 states to 45055 states and 186475 transitions. [2021-06-05 06:28:02,731 INFO L78 Accepts]: Start accepts. Automaton has 45055 states and 186475 transitions. Word has length 39 [2021-06-05 06:28:02,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:02,731 INFO L482 AbstractCegarLoop]: Abstraction has 45055 states and 186475 transitions. [2021-06-05 06:28:02,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:28:02,731 INFO L276 IsEmpty]: Start isEmpty. Operand 45055 states and 186475 transitions. [2021-06-05 06:28:02,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:02,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:02,819 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:03,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 06:28:03,020 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:03,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:03,020 INFO L82 PathProgramCache]: Analyzing trace with hash -448909371, now seen corresponding path program 82 times [2021-06-05 06:28:03,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:03,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844290483] [2021-06-05 06:28:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:03,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:03,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844290483] [2021-06-05 06:28:03,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844290483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:03,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659106391] [2021-06-05 06:28:03,392 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:03,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:28:03,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:03,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:28:03,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:03,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:28:03,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:03,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:03,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:03,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:28:03,955 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:28:03,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:28:03,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:03,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:03,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:03,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:28:04,002 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:04,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659106391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:04,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:04,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:28:04,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510769715] [2021-06-05 06:28:04,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:28:04,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:04,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:28:04,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:28:04,003 INFO L87 Difference]: Start difference. First operand 45055 states and 186475 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:28:05,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:05,695 INFO L93 Difference]: Finished difference Result 99677 states and 406647 transitions. [2021-06-05 06:28:05,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:28:05,696 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:28:05,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:06,387 INFO L225 Difference]: With dead ends: 99677 [2021-06-05 06:28:06,387 INFO L226 Difference]: Without dead ends: 99595 [2021-06-05 06:28:06,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1116.0ms TimeCoverageRelationStatistics Valid=379, Invalid=1783, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:28:06,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99595 states. [2021-06-05 06:28:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99595 to 45321. [2021-06-05 06:28:07,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45321 states, 45320 states have (on average 4.138857016769638) internal successors, (187573), 45320 states have internal predecessors, (187573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45321 states to 45321 states and 187573 transitions. [2021-06-05 06:28:08,049 INFO L78 Accepts]: Start accepts. Automaton has 45321 states and 187573 transitions. Word has length 39 [2021-06-05 06:28:08,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:08,049 INFO L482 AbstractCegarLoop]: Abstraction has 45321 states and 187573 transitions. [2021-06-05 06:28:08,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:28:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand 45321 states and 187573 transitions. [2021-06-05 06:28:08,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:08,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:08,141 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:08,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:08,342 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:08,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:08,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1568844437, now seen corresponding path program 83 times [2021-06-05 06:28:08,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:08,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534020905] [2021-06-05 06:28:08,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:08,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:08,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534020905] [2021-06-05 06:28:08,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534020905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:08,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295743036] [2021-06-05 06:28:08,718 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:08,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:28:08,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:08,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:28:08,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:09,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:09,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-06-05 06:28:09,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:09,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:09,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:09,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:96 [2021-06-05 06:28:09,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:09,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:09,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:09,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:09,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2021-06-05 06:28:09,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:28:09,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:28:09,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:09,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:28:09,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 06:28:09,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:09,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:09,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:28:09,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:09,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:28:09,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 06:28:09,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:09,317 INFO L628 ElimStorePlain]: treesize reduction 49, result has 67.5 percent of original size [2021-06-05 06:28:09,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:28:09,320 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:166, output treesize:90 [2021-06-05 06:28:09,404 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_102], 6=[q2]} [2021-06-05 06:28:09,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:09,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:09,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 32 [2021-06-05 06:28:09,422 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:09,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:09,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:09,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:09,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:09,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:09,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-06-05 06:28:09,475 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:28:09,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:09,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:28:09,510 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:110, output treesize:77 [2021-06-05 06:28:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:09,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295743036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:09,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:09,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:28:09,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584556232] [2021-06-05 06:28:09,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:28:09,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:09,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:28:09,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:28:09,640 INFO L87 Difference]: Start difference. First operand 45321 states and 187573 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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) [2021-06-05 06:28:13,827 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-06-05 06:28:16,085 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 70 [2021-06-05 06:28:19,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:19,040 INFO L93 Difference]: Finished difference Result 112080 states and 452898 transitions. [2021-06-05 06:28:19,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 06:28:19,041 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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 39 [2021-06-05 06:28:19,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:19,400 INFO L225 Difference]: With dead ends: 112080 [2021-06-05 06:28:19,401 INFO L226 Difference]: Without dead ends: 111755 [2021-06-05 06:28:19,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4998 ImplicationChecksByTransitivity, 7595.2ms TimeCoverageRelationStatistics Valid=2280, Invalid=12482, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 06:28:19,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111755 states. [2021-06-05 06:28:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111755 to 45455. [2021-06-05 06:28:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45455 states, 45454 states have (on average 4.137787653451841) internal successors, (188079), 45454 states have internal predecessors, (188079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45455 states to 45455 states and 188079 transitions. [2021-06-05 06:28:21,422 INFO L78 Accepts]: Start accepts. Automaton has 45455 states and 188079 transitions. Word has length 39 [2021-06-05 06:28:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:21,422 INFO L482 AbstractCegarLoop]: Abstraction has 45455 states and 188079 transitions. [2021-06-05 06:28:21,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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) [2021-06-05 06:28:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 45455 states and 188079 transitions. [2021-06-05 06:28:21,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:21,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:21,543 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:21,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-05 06:28:21,744 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:21,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:21,744 INFO L82 PathProgramCache]: Analyzing trace with hash -259731149, now seen corresponding path program 84 times [2021-06-05 06:28:21,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:21,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202048729] [2021-06-05 06:28:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:22,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:22,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202048729] [2021-06-05 06:28:22,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202048729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:22,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169983589] [2021-06-05 06:28:22,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:22,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:28:22,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:22,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:28:22,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:22,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:22,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 06:28:22,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:22,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:22,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:28:22,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:67 [2021-06-05 06:28:22,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:22,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:22,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 41 [2021-06-05 06:28:22,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:22,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:22,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:22,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 06:28:22,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:22,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:22,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:22,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 06:28:22,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:22,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:22,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-06-05 06:28:22,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 06:28:22,767 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-05 06:28:22,768 INFO L628 ElimStorePlain]: treesize reduction 67, result has 72.5 percent of original size [2021-06-05 06:28:22,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:28:22,800 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:242, output treesize:148 [2021-06-05 06:28:22,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:22,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:28:22,973 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:28:23,060 INFO L628 ElimStorePlain]: treesize reduction 21, result has 83.2 percent of original size [2021-06-05 06:28:23,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:23,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:28:23,069 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:28:23,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:23,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:28:23,116 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:112 [2021-06-05 06:28:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:23,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169983589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:23,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:23,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:28:23,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399202475] [2021-06-05 06:28:23,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:28:23,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:23,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:28:23,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:28:23,337 INFO L87 Difference]: Start difference. First operand 45455 states and 188079 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:23,701 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-05 06:28:24,187 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-06-05 06:28:24,822 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-06-05 06:28:27,343 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-06-05 06:28:27,584 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-06-05 06:28:28,049 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-05 06:28:28,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:28,600 INFO L93 Difference]: Finished difference Result 82223 states and 333418 transitions. [2021-06-05 06:28:28,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:28:28,601 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:28,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:28,857 INFO L225 Difference]: With dead ends: 82223 [2021-06-05 06:28:28,857 INFO L226 Difference]: Without dead ends: 82051 [2021-06-05 06:28:28,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 4569.7ms TimeCoverageRelationStatistics Valid=1204, Invalid=4958, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 06:28:28,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82051 states. [2021-06-05 06:28:30,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82051 to 45489. [2021-06-05 06:28:30,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45489 states, 45488 states have (on average 4.137464825888146) internal successors, (188205), 45488 states have internal predecessors, (188205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45489 states to 45489 states and 188205 transitions. [2021-06-05 06:28:30,274 INFO L78 Accepts]: Start accepts. Automaton has 45489 states and 188205 transitions. Word has length 39 [2021-06-05 06:28:30,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:30,274 INFO L482 AbstractCegarLoop]: Abstraction has 45489 states and 188205 transitions. [2021-06-05 06:28:30,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:30,274 INFO L276 IsEmpty]: Start isEmpty. Operand 45489 states and 188205 transitions. [2021-06-05 06:28:30,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:30,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:30,362 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:30,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:30,562 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:30,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:30,563 INFO L82 PathProgramCache]: Analyzing trace with hash -737558007, now seen corresponding path program 85 times [2021-06-05 06:28:30,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:30,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931535553] [2021-06-05 06:28:30,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:30,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:30,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931535553] [2021-06-05 06:28:30,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931535553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:30,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527719027] [2021-06-05 06:28:30,884 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:30,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:28:30,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:31,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:28:31,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:31,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:31,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:31,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:28:31,159 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:28:31,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:28:31,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:31,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:31,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:31,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:15 [2021-06-05 06:28:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:31,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527719027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:31,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:31,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:28:31,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462307519] [2021-06-05 06:28:31,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:28:31,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:31,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:28:31,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:28:31,226 INFO L87 Difference]: Start difference. First operand 45489 states and 188205 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:28:33,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:33,270 INFO L93 Difference]: Finished difference Result 98850 states and 402996 transitions. [2021-06-05 06:28:33,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:28:33,270 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:28:33,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:33,600 INFO L225 Difference]: With dead ends: 98850 [2021-06-05 06:28:33,600 INFO L226 Difference]: Without dead ends: 98768 [2021-06-05 06:28:33,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1041.2ms TimeCoverageRelationStatistics Valid=356, Invalid=1714, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:28:34,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98768 states. [2021-06-05 06:28:35,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98768 to 45517. [2021-06-05 06:28:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45517 states, 45516 states have (on average 4.138566657878548) internal successors, (188371), 45516 states have internal predecessors, (188371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:35,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45517 states to 45517 states and 188371 transitions. [2021-06-05 06:28:35,652 INFO L78 Accepts]: Start accepts. Automaton has 45517 states and 188371 transitions. Word has length 39 [2021-06-05 06:28:35,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:35,652 INFO L482 AbstractCegarLoop]: Abstraction has 45517 states and 188371 transitions. [2021-06-05 06:28:35,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:28:35,652 INFO L276 IsEmpty]: Start isEmpty. Operand 45517 states and 188371 transitions. [2021-06-05 06:28:35,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:35,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:35,745 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:35,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:35,946 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:35,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:35,947 INFO L82 PathProgramCache]: Analyzing trace with hash -707566413, now seen corresponding path program 86 times [2021-06-05 06:28:35,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:35,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100473054] [2021-06-05 06:28:35,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:36,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:36,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100473054] [2021-06-05 06:28:36,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100473054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:36,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114680692] [2021-06-05 06:28:36,277 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:36,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:28:36,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:36,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:28:36,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:36,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:28:36,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:36,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:36,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:36,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:28:36,636 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:28:36,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:28:36,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:36,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:36,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:36,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:28:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:36,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114680692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:36,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:36,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:28:36,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694187638] [2021-06-05 06:28:36,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:28:36,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:36,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:28:36,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:28:36,683 INFO L87 Difference]: Start difference. First operand 45517 states and 188371 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:39,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:39,470 INFO L93 Difference]: Finished difference Result 120384 states and 489351 transitions. [2021-06-05 06:28:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:28:39,470 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:39,863 INFO L225 Difference]: With dead ends: 120384 [2021-06-05 06:28:39,863 INFO L226 Difference]: Without dead ends: 120264 [2021-06-05 06:28:39,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1449.1ms TimeCoverageRelationStatistics Valid=462, Invalid=2294, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:28:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120264 states. [2021-06-05 06:28:41,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120264 to 44931. [2021-06-05 06:28:41,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44931 states, 44930 states have (on average 4.142198976185177) internal successors, (186109), 44930 states have internal predecessors, (186109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:42,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44931 states to 44931 states and 186109 transitions. [2021-06-05 06:28:42,112 INFO L78 Accepts]: Start accepts. Automaton has 44931 states and 186109 transitions. Word has length 39 [2021-06-05 06:28:42,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:42,113 INFO L482 AbstractCegarLoop]: Abstraction has 44931 states and 186109 transitions. [2021-06-05 06:28:42,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:42,113 INFO L276 IsEmpty]: Start isEmpty. Operand 44931 states and 186109 transitions. [2021-06-05 06:28:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:42,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:42,207 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:42,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:42,428 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:42,429 INFO L82 PathProgramCache]: Analyzing trace with hash 411273525, now seen corresponding path program 87 times [2021-06-05 06:28:42,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:42,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471112522] [2021-06-05 06:28:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:42,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:42,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471112522] [2021-06-05 06:28:42,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471112522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:42,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821963741] [2021-06-05 06:28:42,753 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:42,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:28:42,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:42,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:28:42,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:42,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:42,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:42,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-06-05 06:28:42,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:42,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:42,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:42,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:78 [2021-06-05 06:28:43,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:28:43,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:43,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:43,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:43,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:20 [2021-06-05 06:28:43,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:43,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:28:43,144 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:28:43,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:43,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:28:43,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:28:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:43,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821963741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:43,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:43,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:28:43,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861389990] [2021-06-05 06:28:43,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:28:43,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:43,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:28:43,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:28:43,194 INFO L87 Difference]: Start difference. First operand 44931 states and 186109 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:45,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:45,535 INFO L93 Difference]: Finished difference Result 79310 states and 324525 transitions. [2021-06-05 06:28:45,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:28:45,535 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:45,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:45,784 INFO L225 Difference]: With dead ends: 79310 [2021-06-05 06:28:45,784 INFO L226 Difference]: Without dead ends: 79255 [2021-06-05 06:28:45,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1329.4ms TimeCoverageRelationStatistics Valid=370, Invalid=2600, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:28:45,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79255 states. [2021-06-05 06:28:46,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79255 to 45439. [2021-06-05 06:28:47,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45439 states, 45438 states have (on average 4.136757779831859) internal successors, (187966), 45438 states have internal predecessors, (187966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45439 states to 45439 states and 187966 transitions. [2021-06-05 06:28:47,183 INFO L78 Accepts]: Start accepts. Automaton has 45439 states and 187966 transitions. Word has length 39 [2021-06-05 06:28:47,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:47,183 INFO L482 AbstractCegarLoop]: Abstraction has 45439 states and 187966 transitions. [2021-06-05 06:28:47,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:47,183 INFO L276 IsEmpty]: Start isEmpty. Operand 45439 states and 187966 transitions. [2021-06-05 06:28:47,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:47,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:47,277 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:47,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 06:28:47,478 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:47,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:47,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1949174297, now seen corresponding path program 88 times [2021-06-05 06:28:47,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:47,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839649194] [2021-06-05 06:28:47,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:47,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:47,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839649194] [2021-06-05 06:28:47,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839649194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:47,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330440799] [2021-06-05 06:28:47,820 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:47,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:28:47,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:47,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:28:47,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:47,981 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:28:47,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:28:47,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:47,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:47,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:47,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 06:28:48,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:28:48,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:48,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:48,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:48,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:28:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:48,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330440799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:48,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:48,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:28:48,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834961295] [2021-06-05 06:28:48,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:28:48,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:48,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:28:48,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:28:48,149 INFO L87 Difference]: Start difference. First operand 45439 states and 187966 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:28:49,038 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-06-05 06:28:50,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:50,392 INFO L93 Difference]: Finished difference Result 75424 states and 308637 transitions. [2021-06-05 06:28:50,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:28:50,392 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:28:50,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:50,623 INFO L225 Difference]: With dead ends: 75424 [2021-06-05 06:28:50,623 INFO L226 Difference]: Without dead ends: 75208 [2021-06-05 06:28:50,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1534.8ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:28:50,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75208 states. [2021-06-05 06:28:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75208 to 45395. [2021-06-05 06:28:51,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45395 states, 45394 states have (on average 4.1372868661056525) internal successors, (187808), 45394 states have internal predecessors, (187808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45395 states to 45395 states and 187808 transitions. [2021-06-05 06:28:52,002 INFO L78 Accepts]: Start accepts. Automaton has 45395 states and 187808 transitions. Word has length 39 [2021-06-05 06:28:52,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:52,002 INFO L482 AbstractCegarLoop]: Abstraction has 45395 states and 187808 transitions. [2021-06-05 06:28:52,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:28:52,002 INFO L276 IsEmpty]: Start isEmpty. Operand 45395 states and 187808 transitions. [2021-06-05 06:28:52,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:52,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:52,088 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:52,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-05 06:28:52,289 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:52,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:52,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1346065441, now seen corresponding path program 89 times [2021-06-05 06:28:52,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:52,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462330509] [2021-06-05 06:28:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:52,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:52,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462330509] [2021-06-05 06:28:52,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462330509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:52,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313254702] [2021-06-05 06:28:52,951 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:52,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:28:52,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:52,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:28:52,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:53,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:53,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:53,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:53,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:53,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-06-05 06:28:53,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:28:53,149 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-06-05 06:28:53,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:53,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:29 [2021-06-05 06:28:53,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:28:53,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:53,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:53,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:53,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:22 [2021-06-05 06:28:53,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:53,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:53,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:53,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:53,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-06-05 06:28:53,361 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:28:53,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:53,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:28:53,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:19 [2021-06-05 06:28:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:53,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313254702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:53,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:53,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:28:53,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132371284] [2021-06-05 06:28:53,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:28:53,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:53,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:28:53,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:28:53,421 INFO L87 Difference]: Start difference. First operand 45395 states and 187808 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:28:56,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:56,915 INFO L93 Difference]: Finished difference Result 73842 states and 301348 transitions. [2021-06-05 06:28:56,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:28:56,915 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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 39 [2021-06-05 06:28:56,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:57,141 INFO L225 Difference]: With dead ends: 73842 [2021-06-05 06:28:57,141 INFO L226 Difference]: Without dead ends: 73621 [2021-06-05 06:28:57,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 2670.4ms TimeCoverageRelationStatistics Valid=693, Invalid=3999, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:28:57,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73621 states. [2021-06-05 06:28:58,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73621 to 45563. [2021-06-05 06:28:58,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45563 states, 45562 states have (on average 4.135134541942847) internal successors, (188405), 45562 states have internal predecessors, (188405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:58,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45563 states to 45563 states and 188405 transitions. [2021-06-05 06:28:58,367 INFO L78 Accepts]: Start accepts. Automaton has 45563 states and 188405 transitions. Word has length 39 [2021-06-05 06:28:58,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:58,367 INFO L482 AbstractCegarLoop]: Abstraction has 45563 states and 188405 transitions. [2021-06-05 06:28:58,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:28:58,367 INFO L276 IsEmpty]: Start isEmpty. Operand 45563 states and 188405 transitions. [2021-06-05 06:28:58,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:58,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:58,458 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:58,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 06:28:58,658 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:58,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:58,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1740520847, now seen corresponding path program 90 times [2021-06-05 06:28:58,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:58,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665130284] [2021-06-05 06:28:58,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:58,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:58,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665130284] [2021-06-05 06:28:58,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665130284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:58,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470691493] [2021-06-05 06:28:58,928 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:58,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:28:58,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:58,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 06:28:58,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:59,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:59,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-06-05 06:28:59,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:59,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:59,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:59,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:32 [2021-06-05 06:28:59,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:28:59,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:59,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:59,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:59,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:15 [2021-06-05 06:28:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:59,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470691493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:59,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:59,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:28:59,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635122968] [2021-06-05 06:28:59,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:28:59,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:59,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:28:59,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:28:59,322 INFO L87 Difference]: Start difference. First operand 45563 states and 188405 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2021-06-05 06:29:00,319 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-06-05 06:29:02,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:02,160 INFO L93 Difference]: Finished difference Result 94335 states and 383012 transitions. [2021-06-05 06:29:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:29:02,160 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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 39 [2021-06-05 06:29:02,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:02,443 INFO L225 Difference]: With dead ends: 94335 [2021-06-05 06:29:02,443 INFO L226 Difference]: Without dead ends: 94280 [2021-06-05 06:29:02,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1702.1ms TimeCoverageRelationStatistics Valid=427, Invalid=2435, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:29:02,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94280 states. [2021-06-05 06:29:04,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94280 to 45740. [2021-06-05 06:29:04,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45740 states, 45739 states have (on average 4.135923391416515) internal successors, (189173), 45739 states have internal predecessors, (189173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:04,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45740 states to 45740 states and 189173 transitions. [2021-06-05 06:29:04,233 INFO L78 Accepts]: Start accepts. Automaton has 45740 states and 189173 transitions. Word has length 39 [2021-06-05 06:29:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:04,233 INFO L482 AbstractCegarLoop]: Abstraction has 45740 states and 189173 transitions. [2021-06-05 06:29:04,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2021-06-05 06:29:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 45740 states and 189173 transitions. [2021-06-05 06:29:04,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:04,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:04,319 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:04,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable438 [2021-06-05 06:29:04,519 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:04,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:04,520 INFO L82 PathProgramCache]: Analyzing trace with hash -2046291667, now seen corresponding path program 91 times [2021-06-05 06:29:04,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:04,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782653505] [2021-06-05 06:29:04,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:04,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:04,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782653505] [2021-06-05 06:29:04,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782653505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:04,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228492821] [2021-06-05 06:29:04,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:04,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:29:04,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:05,051 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:29:05,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:29:05,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:05,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:05,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:05,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 06:29:05,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:29:05,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:05,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:05,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:05,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:29:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:05,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228492821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:05,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:05,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:29:05,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763054158] [2021-06-05 06:29:05,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:29:05,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:05,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:29:05,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:29:05,224 INFO L87 Difference]: Start difference. First operand 45740 states and 189173 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:29:07,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:07,524 INFO L93 Difference]: Finished difference Result 89214 states and 362971 transitions. [2021-06-05 06:29:07,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:29:07,524 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:29:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:07,806 INFO L225 Difference]: With dead ends: 89214 [2021-06-05 06:29:07,806 INFO L226 Difference]: Without dead ends: 89030 [2021-06-05 06:29:07,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1178.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1804, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:29:07,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89030 states. [2021-06-05 06:29:09,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89030 to 45528. [2021-06-05 06:29:09,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45528 states, 45527 states have (on average 4.138950512882466) internal successors, (188434), 45527 states have internal predecessors, (188434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45528 states to 45528 states and 188434 transitions. [2021-06-05 06:29:09,348 INFO L78 Accepts]: Start accepts. Automaton has 45528 states and 188434 transitions. Word has length 39 [2021-06-05 06:29:09,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:09,348 INFO L482 AbstractCegarLoop]: Abstraction has 45528 states and 188434 transitions. [2021-06-05 06:29:09,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:29:09,348 INFO L276 IsEmpty]: Start isEmpty. Operand 45528 states and 188434 transitions. [2021-06-05 06:29:09,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:09,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:09,441 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:09,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 06:29:09,643 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:09,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:09,643 INFO L82 PathProgramCache]: Analyzing trace with hash 208901727, now seen corresponding path program 92 times [2021-06-05 06:29:09,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:09,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451257778] [2021-06-05 06:29:09,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:09,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:09,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451257778] [2021-06-05 06:29:09,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451257778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:09,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372532309] [2021-06-05 06:29:09,923 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:09,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:29:09,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:09,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:29:09,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:10,083 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:29:10,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:29:10,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:10,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:10,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:10,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 06:29:10,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:29:10,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:10,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:10,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:10,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 06:29:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:10,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372532309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:10,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:10,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:29:10,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412933346] [2021-06-05 06:29:10,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:29:10,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:10,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:29:10,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:29:10,595 INFO L87 Difference]: Start difference. First operand 45528 states and 188434 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:29:12,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:12,167 INFO L93 Difference]: Finished difference Result 79756 states and 328257 transitions. [2021-06-05 06:29:12,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:29:12,168 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:29:12,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:12,417 INFO L225 Difference]: With dead ends: 79756 [2021-06-05 06:29:12,417 INFO L226 Difference]: Without dead ends: 79701 [2021-06-05 06:29:12,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1216.0ms TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:29:12,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79701 states. [2021-06-05 06:29:13,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79701 to 45068. [2021-06-05 06:29:13,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45068 states, 45067 states have (on average 4.140435351809528) internal successors, (186597), 45067 states have internal predecessors, (186597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:13,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45068 states to 45068 states and 186597 transitions. [2021-06-05 06:29:13,902 INFO L78 Accepts]: Start accepts. Automaton has 45068 states and 186597 transitions. Word has length 39 [2021-06-05 06:29:13,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:13,902 INFO L482 AbstractCegarLoop]: Abstraction has 45068 states and 186597 transitions. [2021-06-05 06:29:13,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:29:13,902 INFO L276 IsEmpty]: Start isEmpty. Operand 45068 states and 186597 transitions. [2021-06-05 06:29:14,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:14,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:14,282 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:14,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 06:29:14,504 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:14,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2136317753, now seen corresponding path program 93 times [2021-06-05 06:29:14,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:14,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757481104] [2021-06-05 06:29:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:14,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:14,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757481104] [2021-06-05 06:29:14,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757481104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:14,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897766559] [2021-06-05 06:29:14,778 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:14,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:29:14,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:14,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:29:14,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:14,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:14,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:14,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-06-05 06:29:14,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:14,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:15,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:15,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:88 [2021-06-05 06:29:15,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:29:15,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:15,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:15,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:15,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 06:29:15,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:15,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:29:15,164 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:29:15,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:15,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:29:15,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:29:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:15,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897766559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:15,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:15,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:29:15,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807690922] [2021-06-05 06:29:15,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:29:15,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:15,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:29:15,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:29:15,216 INFO L87 Difference]: Start difference. First operand 45068 states and 186597 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:17,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:17,774 INFO L93 Difference]: Finished difference Result 79011 states and 323540 transitions. [2021-06-05 06:29:17,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:29:17,774 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:29:17,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:18,018 INFO L225 Difference]: With dead ends: 79011 [2021-06-05 06:29:18,019 INFO L226 Difference]: Without dead ends: 78956 [2021-06-05 06:29:18,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1445.9ms TimeCoverageRelationStatistics Valid=422, Invalid=2884, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:29:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78956 states. [2021-06-05 06:29:19,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78956 to 45443. [2021-06-05 06:29:19,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45443 states, 45442 states have (on average 4.137780027287532) internal successors, (188029), 45442 states have internal predecessors, (188029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:19,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45443 states to 45443 states and 188029 transitions. [2021-06-05 06:29:19,393 INFO L78 Accepts]: Start accepts. Automaton has 45443 states and 188029 transitions. Word has length 39 [2021-06-05 06:29:19,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:19,393 INFO L482 AbstractCegarLoop]: Abstraction has 45443 states and 188029 transitions. [2021-06-05 06:29:19,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:19,393 INFO L276 IsEmpty]: Start isEmpty. Operand 45443 states and 188029 transitions. [2021-06-05 06:29:19,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:19,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:19,481 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:19,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 06:29:19,681 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:19,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:19,681 INFO L82 PathProgramCache]: Analyzing trace with hash -201798279, now seen corresponding path program 94 times [2021-06-05 06:29:19,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:19,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984710151] [2021-06-05 06:29:19,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:19,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:19,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984710151] [2021-06-05 06:29:19,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984710151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:19,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379615842] [2021-06-05 06:29:19,987 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:20,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:29:20,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:20,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:29:20,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:20,174 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:29:20,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:29:20,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:20,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:20,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:20,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 06:29:20,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:29:20,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:20,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:20,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:20,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:29:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:20,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379615842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:20,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:20,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:29:20,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019007408] [2021-06-05 06:29:20,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:29:20,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:20,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:29:20,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:29:20,317 INFO L87 Difference]: Start difference. First operand 45443 states and 188029 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:29:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:22,400 INFO L93 Difference]: Finished difference Result 75260 states and 308087 transitions. [2021-06-05 06:29:22,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:29:22,401 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:29:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:22,647 INFO L225 Difference]: With dead ends: 75260 [2021-06-05 06:29:22,647 INFO L226 Difference]: Without dead ends: 75044 [2021-06-05 06:29:22,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1451.4ms TimeCoverageRelationStatistics Valid=348, Invalid=1722, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:29:22,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75044 states. [2021-06-05 06:29:23,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75044 to 45399. [2021-06-05 06:29:23,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45399 states, 45398 states have (on average 4.138310057711793) internal successors, (187871), 45398 states have internal predecessors, (187871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45399 states to 45399 states and 187871 transitions. [2021-06-05 06:29:24,103 INFO L78 Accepts]: Start accepts. Automaton has 45399 states and 187871 transitions. Word has length 39 [2021-06-05 06:29:24,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:24,103 INFO L482 AbstractCegarLoop]: Abstraction has 45399 states and 187871 transitions. [2021-06-05 06:29:24,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:29:24,103 INFO L276 IsEmpty]: Start isEmpty. Operand 45399 states and 187871 transitions. [2021-06-05 06:29:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:24,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:24,186 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:24,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:24,386 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:24,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:24,387 INFO L82 PathProgramCache]: Analyzing trace with hash 401310577, now seen corresponding path program 95 times [2021-06-05 06:29:24,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:24,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982612216] [2021-06-05 06:29:24,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:24,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:24,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982612216] [2021-06-05 06:29:24,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982612216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:24,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319046858] [2021-06-05 06:29:24,744 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:24,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:29:24,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:24,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:29:24,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:24,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:24,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:24,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:24,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:24,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-06-05 06:29:24,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:29:24,998 INFO L628 ElimStorePlain]: treesize reduction 37, result has 54.3 percent of original size [2021-06-05 06:29:25,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:25,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:45 [2021-06-05 06:29:25,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:29:25,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:25,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:25,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:25,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:29:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:25,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319046858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:25,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:25,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:29:25,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162555074] [2021-06-05 06:29:25,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:29:25,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:25,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:29:25,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:29:25,524 INFO L87 Difference]: Start difference. First operand 45399 states and 187871 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2021-06-05 06:29:28,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:28,314 INFO L93 Difference]: Finished difference Result 72407 states and 295781 transitions. [2021-06-05 06:29:28,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:29:28,314 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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 39 [2021-06-05 06:29:28,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:28,548 INFO L225 Difference]: With dead ends: 72407 [2021-06-05 06:29:28,548 INFO L226 Difference]: Without dead ends: 72279 [2021-06-05 06:29:28,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1572.1ms TimeCoverageRelationStatistics Valid=409, Invalid=2347, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:29:28,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72279 states. [2021-06-05 06:29:29,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72279 to 45567. [2021-06-05 06:29:29,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45567 states, 45566 states have (on average 4.136154150024141) internal successors, (188468), 45566 states have internal predecessors, (188468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:29,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45567 states to 45567 states and 188468 transitions. [2021-06-05 06:29:29,955 INFO L78 Accepts]: Start accepts. Automaton has 45567 states and 188468 transitions. Word has length 39 [2021-06-05 06:29:29,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:29,955 INFO L482 AbstractCegarLoop]: Abstraction has 45567 states and 188468 transitions. [2021-06-05 06:29:29,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2021-06-05 06:29:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 45567 states and 188468 transitions. [2021-06-05 06:29:30,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:30,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:30,037 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:30,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:30,237 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:30,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:30,237 INFO L82 PathProgramCache]: Analyzing trace with hash 337270923, now seen corresponding path program 96 times [2021-06-05 06:29:30,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:30,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537573986] [2021-06-05 06:29:30,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:30,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:30,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537573986] [2021-06-05 06:29:30,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537573986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:30,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881930377] [2021-06-05 06:29:30,509 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:30,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:29:30,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:30,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 06:29:30,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:30,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:30,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-06-05 06:29:30,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:30,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:30,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:30,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:43 [2021-06-05 06:29:30,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:29:30,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:30,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:30,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:30,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 06:29:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:30,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881930377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:30,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:30,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:29:30,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926794702] [2021-06-05 06:29:30,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:29:30,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:30,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:29:30,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:29:30,920 INFO L87 Difference]: Start difference. First operand 45567 states and 188468 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2021-06-05 06:29:34,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:34,195 INFO L93 Difference]: Finished difference Result 94920 states and 385436 transitions. [2021-06-05 06:29:34,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:29:34,196 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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 39 [2021-06-05 06:29:34,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:34,486 INFO L225 Difference]: With dead ends: 94920 [2021-06-05 06:29:34,486 INFO L226 Difference]: Without dead ends: 94865 [2021-06-05 06:29:34,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1821.6ms TimeCoverageRelationStatistics Valid=467, Invalid=2613, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:29:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94865 states. [2021-06-05 06:29:35,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94865 to 45689. [2021-06-05 06:29:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45689 states, 45688 states have (on average 4.138811066363159) internal successors, (189094), 45688 states have internal predecessors, (189094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:36,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45689 states to 45689 states and 189094 transitions. [2021-06-05 06:29:36,083 INFO L78 Accepts]: Start accepts. Automaton has 45689 states and 189094 transitions. Word has length 39 [2021-06-05 06:29:36,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:36,083 INFO L482 AbstractCegarLoop]: Abstraction has 45689 states and 189094 transitions. [2021-06-05 06:29:36,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2021-06-05 06:29:36,083 INFO L276 IsEmpty]: Start isEmpty. Operand 45689 states and 189094 transitions. [2021-06-05 06:29:36,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:36,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:36,548 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:36,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 06:29:36,749 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:36,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:36,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2041933109, now seen corresponding path program 97 times [2021-06-05 06:29:36,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:36,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223301547] [2021-06-05 06:29:36,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:37,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:37,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223301547] [2021-06-05 06:29:37,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223301547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:37,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071187128] [2021-06-05 06:29:37,011 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:37,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:29:37,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:37,195 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:29:37,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:29:37,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:37,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:37,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:37,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 06:29:37,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:29:37,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:37,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:37,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:37,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 06:29:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:37,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071187128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:37,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:37,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:29:37,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657313641] [2021-06-05 06:29:37,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:29:37,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:37,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:29:37,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:29:37,328 INFO L87 Difference]: Start difference. First operand 45689 states and 189094 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:29:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:39,267 INFO L93 Difference]: Finished difference Result 79793 states and 328412 transitions. [2021-06-05 06:29:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:29:39,268 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:29:39,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:39,518 INFO L225 Difference]: With dead ends: 79793 [2021-06-05 06:29:39,518 INFO L226 Difference]: Without dead ends: 79738 [2021-06-05 06:29:39,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 834.5ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:29:39,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79738 states. [2021-06-05 06:29:40,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79738 to 45408. [2021-06-05 06:29:40,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45408 states, 45407 states have (on average 4.137115422732178) internal successors, (187854), 45407 states have internal predecessors, (187854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:40,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45408 states to 45408 states and 187854 transitions. [2021-06-05 06:29:40,928 INFO L78 Accepts]: Start accepts. Automaton has 45408 states and 187854 transitions. Word has length 39 [2021-06-05 06:29:40,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:40,928 INFO L482 AbstractCegarLoop]: Abstraction has 45408 states and 187854 transitions. [2021-06-05 06:29:40,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:29:40,928 INFO L276 IsEmpty]: Start isEmpty. Operand 45408 states and 187854 transitions. [2021-06-05 06:29:41,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:41,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:41,014 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:41,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:41,215 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:41,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:41,215 INFO L82 PathProgramCache]: Analyzing trace with hash 210357187, now seen corresponding path program 98 times [2021-06-05 06:29:41,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:41,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383877423] [2021-06-05 06:29:41,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:41,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:41,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:41,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383877423] [2021-06-05 06:29:41,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383877423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:41,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509786061] [2021-06-05 06:29:41,619 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:41,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:29:41,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:41,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:29:41,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:41,830 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:29:41,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:29:41,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:41,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:41,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:41,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 06:29:41,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:29:41,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:41,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:41,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:41,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:29:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:41,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509786061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:41,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:41,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:29:41,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350788399] [2021-06-05 06:29:41,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:29:41,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:41,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:29:41,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:29:41,984 INFO L87 Difference]: Start difference. First operand 45408 states and 187854 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:29:44,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:44,066 INFO L93 Difference]: Finished difference Result 89040 states and 362265 transitions. [2021-06-05 06:29:44,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:29:44,066 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:29:44,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:44,320 INFO L225 Difference]: With dead ends: 89040 [2021-06-05 06:29:44,320 INFO L226 Difference]: Without dead ends: 88856 [2021-06-05 06:29:44,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1223.3ms TimeCoverageRelationStatistics Valid=365, Invalid=1797, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:29:44,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88856 states. [2021-06-05 06:29:45,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88856 to 45102. [2021-06-05 06:29:45,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45102 states, 45101 states have (on average 4.140329482716569) internal successors, (186733), 45101 states have internal predecessors, (186733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:46,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45102 states to 45102 states and 186733 transitions. [2021-06-05 06:29:46,111 INFO L78 Accepts]: Start accepts. Automaton has 45102 states and 186733 transitions. Word has length 39 [2021-06-05 06:29:46,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:46,111 INFO L482 AbstractCegarLoop]: Abstraction has 45102 states and 186733 transitions. [2021-06-05 06:29:46,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:29:46,111 INFO L276 IsEmpty]: Start isEmpty. Operand 45102 states and 186733 transitions. [2021-06-05 06:29:46,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:46,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:46,197 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:46,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-05 06:29:46,399 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:46,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:46,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1628962993, now seen corresponding path program 99 times [2021-06-05 06:29:46,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:46,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908547504] [2021-06-05 06:29:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:46,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:46,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908547504] [2021-06-05 06:29:46,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908547504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:46,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848991938] [2021-06-05 06:29:46,717 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:46,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:29:46,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:46,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:29:46,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:47,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:47,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:47,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-06-05 06:29:47,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:47,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:47,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:47,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:50 [2021-06-05 06:29:47,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:47,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 46 [2021-06-05 06:29:47,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:47,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:47,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:47,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:116 [2021-06-05 06:29:48,039 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-06-05 06:29:48,133 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_105], 3=[q2, v_prenex_104]} [2021-06-05 06:29:48,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:48,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:29:48,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:48,273 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-06-05 06:29:48,273 INFO L628 ElimStorePlain]: treesize reduction 235, result has 40.7 percent of original size [2021-06-05 06:29:48,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:48,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-06-05 06:29:48,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:48,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:48,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:48,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:48,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 06:29:48,289 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:29:48,351 INFO L628 ElimStorePlain]: treesize reduction 71, result has 48.6 percent of original size [2021-06-05 06:29:48,351 INFO L518 ElimStorePlain]: Eliminatee v_prenex_104 vanished before elimination [2021-06-05 06:29:48,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:29:48,353 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:407, output treesize:65 [2021-06-05 06:29:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:48,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848991938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:48,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:48,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:29:48,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145256158] [2021-06-05 06:29:48,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:29:48,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:48,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:29:48,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:29:48,430 INFO L87 Difference]: Start difference. First operand 45102 states and 186733 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:49,529 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2021-06-05 06:29:49,873 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 74 [2021-06-05 06:29:50,050 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-06-05 06:29:50,422 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-05 06:29:50,652 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-06-05 06:29:51,530 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 06:29:51,783 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 52 [2021-06-05 06:29:52,060 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 59 [2021-06-05 06:29:52,465 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 68 [2021-06-05 06:29:52,750 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-06-05 06:29:53,679 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-06-05 06:29:54,804 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-06-05 06:29:55,075 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-06-05 06:29:55,263 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-06-05 06:29:55,685 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-05 06:29:56,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:56,404 INFO L93 Difference]: Finished difference Result 78707 states and 320669 transitions. [2021-06-05 06:29:56,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 06:29:56,405 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:29:56,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:56,637 INFO L225 Difference]: With dead ends: 78707 [2021-06-05 06:29:56,637 INFO L226 Difference]: Without dead ends: 78625 [2021-06-05 06:29:56,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 6532.8ms TimeCoverageRelationStatistics Valid=980, Invalid=8526, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 06:29:56,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78625 states. [2021-06-05 06:29:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78625 to 45745. [2021-06-05 06:29:57,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45745 states, 45744 states have (on average 4.136323889471844) internal successors, (189212), 45744 states have internal predecessors, (189212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:57,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45745 states to 45745 states and 189212 transitions. [2021-06-05 06:29:57,960 INFO L78 Accepts]: Start accepts. Automaton has 45745 states and 189212 transitions. Word has length 39 [2021-06-05 06:29:57,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:57,960 INFO L482 AbstractCegarLoop]: Abstraction has 45745 states and 189212 transitions. [2021-06-05 06:29:57,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:57,960 INFO L276 IsEmpty]: Start isEmpty. Operand 45745 states and 189212 transitions. [2021-06-05 06:29:58,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:58,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:58,046 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:58,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:58,247 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:58,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:58,247 INFO L82 PathProgramCache]: Analyzing trace with hash -867045925, now seen corresponding path program 100 times [2021-06-05 06:29:58,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:58,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537071213] [2021-06-05 06:29:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:58,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:58,517 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-06-05 06:29:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:58,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:58,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537071213] [2021-06-05 06:29:58,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537071213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:58,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930390121] [2021-06-05 06:29:58,780 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:58,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:29:58,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:58,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:29:58,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:58,988 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:29:58,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:29:58,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:58,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:58,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:58,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 06:29:59,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:29:59,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:59,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:59,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:29:59,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 06:29:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:59,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930390121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:59,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:59,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:29:59,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874267056] [2021-06-05 06:29:59,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:29:59,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:59,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:29:59,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:29:59,098 INFO L87 Difference]: Start difference. First operand 45745 states and 189212 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:30:00,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:00,583 INFO L93 Difference]: Finished difference Result 79931 states and 328985 transitions. [2021-06-05 06:30:00,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:30:00,584 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:30:00,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:01,131 INFO L225 Difference]: With dead ends: 79931 [2021-06-05 06:30:01,131 INFO L226 Difference]: Without dead ends: 79876 [2021-06-05 06:30:01,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 841.6ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:30:01,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79876 states. [2021-06-05 06:30:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79876 to 45624. [2021-06-05 06:30:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45624 states, 45623 states have (on average 4.137123819126318) internal successors, (188748), 45623 states have internal predecessors, (188748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:02,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45624 states to 45624 states and 188748 transitions. [2021-06-05 06:30:02,620 INFO L78 Accepts]: Start accepts. Automaton has 45624 states and 188748 transitions. Word has length 39 [2021-06-05 06:30:02,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:02,620 INFO L482 AbstractCegarLoop]: Abstraction has 45624 states and 188748 transitions. [2021-06-05 06:30:02,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:30:02,620 INFO L276 IsEmpty]: Start isEmpty. Operand 45624 states and 188748 transitions. [2021-06-05 06:30:02,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:02,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:02,713 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:02,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:02,913 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:02,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:02,914 INFO L82 PathProgramCache]: Analyzing trace with hash -731484829, now seen corresponding path program 101 times [2021-06-05 06:30:02,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:02,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285415246] [2021-06-05 06:30:02,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:03,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:03,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285415246] [2021-06-05 06:30:03,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285415246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:03,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230107868] [2021-06-05 06:30:03,237 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:03,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:30:03,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:03,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:30:03,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:03,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:03,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:03,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:03,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:03,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-06-05 06:30:03,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:30:03,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:03,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:03,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:42 [2021-06-05 06:30:03,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:30:03,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:03,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:03,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:30:03,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 06:30:03,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:03,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:03,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:03,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:03,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 06:30:03,679 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:30:03,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:03,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:30:03,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 06:30:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:03,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230107868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:03,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:03,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:30:03,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614332765] [2021-06-05 06:30:03,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:30:03,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:03,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:30:03,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:30:03,742 INFO L87 Difference]: Start difference. First operand 45624 states and 188748 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:30:08,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:08,009 INFO L93 Difference]: Finished difference Result 83001 states and 338646 transitions. [2021-06-05 06:30:08,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 06:30:08,010 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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 39 [2021-06-05 06:30:08,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:08,545 INFO L225 Difference]: With dead ends: 83001 [2021-06-05 06:30:08,545 INFO L226 Difference]: Without dead ends: 82572 [2021-06-05 06:30:08,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 2561.5ms TimeCoverageRelationStatistics Valid=717, Invalid=5135, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:30:08,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82572 states. [2021-06-05 06:30:09,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82572 to 46140. [2021-06-05 06:30:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46140 states, 46139 states have (on average 4.1339864323023905) internal successors, (190738), 46139 states have internal predecessors, (190738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:10,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46140 states to 46140 states and 190738 transitions. [2021-06-05 06:30:10,087 INFO L78 Accepts]: Start accepts. Automaton has 46140 states and 190738 transitions. Word has length 39 [2021-06-05 06:30:10,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:10,087 INFO L482 AbstractCegarLoop]: Abstraction has 46140 states and 190738 transitions. [2021-06-05 06:30:10,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:30:10,087 INFO L276 IsEmpty]: Start isEmpty. Operand 46140 states and 190738 transitions. [2021-06-05 06:30:10,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:10,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:10,179 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:10,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 06:30:10,380 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:10,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:10,380 INFO L82 PathProgramCache]: Analyzing trace with hash -869929743, now seen corresponding path program 102 times [2021-06-05 06:30:10,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:10,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206664388] [2021-06-05 06:30:10,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:10,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:10,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206664388] [2021-06-05 06:30:10,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206664388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:10,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529072242] [2021-06-05 06:30:10,749 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:10,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:30:10,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:10,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:30:10,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:10,965 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:30:10,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:30:10,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:10,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:10,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:10,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-06-05 06:30:11,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:30:11,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:11,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:11,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:11,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:30:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:11,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529072242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:11,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:11,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:30:11,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409601040] [2021-06-05 06:30:11,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:30:11,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:11,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:30:11,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:30:11,085 INFO L87 Difference]: Start difference. First operand 46140 states and 190738 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:30:13,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:13,235 INFO L93 Difference]: Finished difference Result 90463 states and 367919 transitions. [2021-06-05 06:30:13,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:30:13,235 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:30:13,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:13,518 INFO L225 Difference]: With dead ends: 90463 [2021-06-05 06:30:13,518 INFO L226 Difference]: Without dead ends: 90247 [2021-06-05 06:30:13,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1308.7ms TimeCoverageRelationStatistics Valid=424, Invalid=2228, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:30:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90247 states. [2021-06-05 06:30:14,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90247 to 45740. [2021-06-05 06:30:14,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45740 states, 45739 states have (on average 4.136163886398916) internal successors, (189184), 45739 states have internal predecessors, (189184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:15,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45740 states to 45740 states and 189184 transitions. [2021-06-05 06:30:15,088 INFO L78 Accepts]: Start accepts. Automaton has 45740 states and 189184 transitions. Word has length 39 [2021-06-05 06:30:15,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:15,089 INFO L482 AbstractCegarLoop]: Abstraction has 45740 states and 189184 transitions. [2021-06-05 06:30:15,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:30:15,089 INFO L276 IsEmpty]: Start isEmpty. Operand 45740 states and 189184 transitions. [2021-06-05 06:30:15,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:15,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:15,182 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:15,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-05 06:30:15,384 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:15,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:15,384 INFO L82 PathProgramCache]: Analyzing trace with hash 471732141, now seen corresponding path program 103 times [2021-06-05 06:30:15,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:15,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931942657] [2021-06-05 06:30:15,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:15,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:15,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931942657] [2021-06-05 06:30:15,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931942657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:15,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123193706] [2021-06-05 06:30:15,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:15,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:30:15,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:15,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:30:15,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:15,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:15,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:15,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:30:15,963 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:30:15,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:30:15,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:15,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:15,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:15,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 06:30:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:16,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123193706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:16,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:16,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 06:30:16,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789418481] [2021-06-05 06:30:16,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:30:16,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:16,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:30:16,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:30:16,011 INFO L87 Difference]: Start difference. First operand 45740 states and 189184 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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) [2021-06-05 06:30:17,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:17,926 INFO L93 Difference]: Finished difference Result 82993 states and 341560 transitions. [2021-06-05 06:30:17,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:30:17,926 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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 39 [2021-06-05 06:30:17,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:18,168 INFO L225 Difference]: With dead ends: 82993 [2021-06-05 06:30:18,168 INFO L226 Difference]: Without dead ends: 82938 [2021-06-05 06:30:18,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 846.4ms TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:30:18,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82938 states. [2021-06-05 06:30:19,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82938 to 45928. [2021-06-05 06:30:19,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45928 states, 45927 states have (on average 4.1409846060051825) internal successors, (190183), 45927 states have internal predecessors, (190183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45928 states to 45928 states and 190183 transitions. [2021-06-05 06:30:19,653 INFO L78 Accepts]: Start accepts. Automaton has 45928 states and 190183 transitions. Word has length 39 [2021-06-05 06:30:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:19,653 INFO L482 AbstractCegarLoop]: Abstraction has 45928 states and 190183 transitions. [2021-06-05 06:30:19,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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) [2021-06-05 06:30:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand 45928 states and 190183 transitions. [2021-06-05 06:30:19,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:19,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:19,735 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:19,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:19,935 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:19,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:19,936 INFO L82 PathProgramCache]: Analyzing trace with hash -165855889, now seen corresponding path program 104 times [2021-06-05 06:30:19,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:19,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289415280] [2021-06-05 06:30:19,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:20,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:20,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289415280] [2021-06-05 06:30:20,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289415280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:20,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284763934] [2021-06-05 06:30:20,654 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:20,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:30:20,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:20,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 06:30:20,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:20,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:30:20,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:20,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:20,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:20,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-06-05 06:30:20,949 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:30:20,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 06:30:20,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:20,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:20,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:20,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-06-05 06:30:20,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:20,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:30:20,992 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:30:20,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:21,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:30:21,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:30:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:21,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284763934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:21,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:21,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:30:21,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54087567] [2021-06-05 06:30:21,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:30:21,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:21,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:30:21,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:30:21,039 INFO L87 Difference]: Start difference. First operand 45928 states and 190183 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:23,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:23,469 INFO L93 Difference]: Finished difference Result 103653 states and 427349 transitions. [2021-06-05 06:30:23,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:30:23,470 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:30:23,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:23,818 INFO L225 Difference]: With dead ends: 103653 [2021-06-05 06:30:23,818 INFO L226 Difference]: Without dead ends: 103598 [2021-06-05 06:30:23,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1600.9ms TimeCoverageRelationStatistics Valid=360, Invalid=2190, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:30:23,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103598 states. [2021-06-05 06:30:25,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103598 to 46168. [2021-06-05 06:30:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46168 states, 46167 states have (on average 4.142417744276215) internal successors, (191243), 46167 states have internal predecessors, (191243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46168 states to 46168 states and 191243 transitions. [2021-06-05 06:30:25,387 INFO L78 Accepts]: Start accepts. Automaton has 46168 states and 191243 transitions. Word has length 39 [2021-06-05 06:30:25,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:25,387 INFO L482 AbstractCegarLoop]: Abstraction has 46168 states and 191243 transitions. [2021-06-05 06:30:25,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:25,387 INFO L276 IsEmpty]: Start isEmpty. Operand 46168 states and 191243 transitions. [2021-06-05 06:30:25,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:25,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:25,478 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:25,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:25,678 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:25,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:25,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1253137135, now seen corresponding path program 105 times [2021-06-05 06:30:25,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:25,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275006446] [2021-06-05 06:30:25,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:25,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:25,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275006446] [2021-06-05 06:30:25,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275006446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:25,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770457882] [2021-06-05 06:30:25,947 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:25,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:30:25,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:25,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 06:30:25,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:26,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:26,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:30:26,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:30:26,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:26,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:26,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:26,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 06:30:26,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:26,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:26,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 53 [2021-06-05 06:30:26,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:26,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:26,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:26,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:30:26,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:26,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:26,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 06:30:26,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:30:26,527 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:30:26,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 12 [2021-06-05 06:30:26,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:26,535 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:30:26,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 12 [2021-06-05 06:30:26,537 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:26,595 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.1 percent of original size [2021-06-05 06:30:26,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:30:26,597 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:116, output treesize:81 [2021-06-05 06:30:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:26,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770457882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:26,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:26,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:30:26,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622571217] [2021-06-05 06:30:26,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:30:26,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:26,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:30:26,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:30:26,726 INFO L87 Difference]: Start difference. First operand 46168 states and 191243 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:32,522 INFO L93 Difference]: Finished difference Result 99309 states and 407027 transitions. [2021-06-05 06:30:32,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:30:32,523 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:30:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:32,855 INFO L225 Difference]: With dead ends: 99309 [2021-06-05 06:30:32,855 INFO L226 Difference]: Without dead ends: 99215 [2021-06-05 06:30:32,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 3061.3ms TimeCoverageRelationStatistics Valid=782, Invalid=5698, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 06:30:32,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99215 states. [2021-06-05 06:30:34,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99215 to 46358. [2021-06-05 06:30:34,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46358 states, 46357 states have (on average 4.141445736350497) internal successors, (191985), 46357 states have internal predecessors, (191985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46358 states to 46358 states and 191985 transitions. [2021-06-05 06:30:34,884 INFO L78 Accepts]: Start accepts. Automaton has 46358 states and 191985 transitions. Word has length 39 [2021-06-05 06:30:34,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:34,886 INFO L482 AbstractCegarLoop]: Abstraction has 46358 states and 191985 transitions. [2021-06-05 06:30:34,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 46358 states and 191985 transitions. [2021-06-05 06:30:34,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:34,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:34,987 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:35,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:35,188 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:35,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:35,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1564815849, now seen corresponding path program 106 times [2021-06-05 06:30:35,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:35,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131960155] [2021-06-05 06:30:35,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:35,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:35,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131960155] [2021-06-05 06:30:35,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131960155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:35,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773288669] [2021-06-05 06:30:35,550 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:35,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:30:35,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:35,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:30:35,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:35,800 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:30:35,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:30:35,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:35,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:35,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:35,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 06:30:35,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:30:35,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:35,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:35,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:35,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:30:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:35,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773288669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:35,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:35,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:30:35,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467045855] [2021-06-05 06:30:35,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:30:35,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:35,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:30:35,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:30:35,889 INFO L87 Difference]: Start difference. First operand 46358 states and 191985 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:30:37,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:37,723 INFO L93 Difference]: Finished difference Result 76448 states and 312769 transitions. [2021-06-05 06:30:37,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:30:37,723 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:30:37,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:37,965 INFO L225 Difference]: With dead ends: 76448 [2021-06-05 06:30:37,965 INFO L226 Difference]: Without dead ends: 76200 [2021-06-05 06:30:37,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1064.3ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:30:38,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76200 states. [2021-06-05 06:30:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76200 to 46544. [2021-06-05 06:30:39,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46544 states, 46543 states have (on average 4.139935113765765) internal successors, (192685), 46543 states have internal predecessors, (192685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46544 states to 46544 states and 192685 transitions. [2021-06-05 06:30:39,362 INFO L78 Accepts]: Start accepts. Automaton has 46544 states and 192685 transitions. Word has length 39 [2021-06-05 06:30:39,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:39,363 INFO L482 AbstractCegarLoop]: Abstraction has 46544 states and 192685 transitions. [2021-06-05 06:30:39,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:30:39,363 INFO L276 IsEmpty]: Start isEmpty. Operand 46544 states and 192685 transitions. [2021-06-05 06:30:39,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:39,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:39,451 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:39,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2021-06-05 06:30:39,652 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:39,652 INFO L82 PathProgramCache]: Analyzing trace with hash 452270203, now seen corresponding path program 107 times [2021-06-05 06:30:39,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:39,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956847719] [2021-06-05 06:30:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:39,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:39,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956847719] [2021-06-05 06:30:39,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956847719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:39,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053689367] [2021-06-05 06:30:39,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:40,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:30:40,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:40,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 06:30:40,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:40,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:40,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:30:40,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:40,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:40,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:30:40,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:81 [2021-06-05 06:30:40,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:40,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-06-05 06:30:40,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:40,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:40,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 06:30:40,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:40,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:40,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2021-06-05 06:30:40,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:40,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:40,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 06:30:40,526 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:178, output treesize:85 [2021-06-05 06:30:40,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:40,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:40,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:40,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:40,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 06:30:40,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:30:40,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:40,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:30:40,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 06:30:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:40,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053689367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:40,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:40,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 06:30:40,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542441598] [2021-06-05 06:30:40,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:30:40,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:40,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:30:40,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:30:40,802 INFO L87 Difference]: Start difference. First operand 46544 states and 192685 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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) [2021-06-05 06:30:41,563 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-06-05 06:30:46,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:46,916 INFO L93 Difference]: Finished difference Result 97317 states and 395236 transitions. [2021-06-05 06:30:46,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 06:30:46,916 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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 39 [2021-06-05 06:30:46,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:47,220 INFO L225 Difference]: With dead ends: 97317 [2021-06-05 06:30:47,221 INFO L226 Difference]: Without dead ends: 96834 [2021-06-05 06:30:47,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 4567.5ms TimeCoverageRelationStatistics Valid=1151, Invalid=6681, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 06:30:47,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96834 states. [2021-06-05 06:30:48,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96834 to 46666. [2021-06-05 06:30:48,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46666 states, 46665 states have (on average 4.139569270331084) internal successors, (193173), 46665 states have internal predecessors, (193173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46666 states to 46666 states and 193173 transitions. [2021-06-05 06:30:48,769 INFO L78 Accepts]: Start accepts. Automaton has 46666 states and 193173 transitions. Word has length 39 [2021-06-05 06:30:48,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:48,769 INFO L482 AbstractCegarLoop]: Abstraction has 46666 states and 193173 transitions. [2021-06-05 06:30:48,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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) [2021-06-05 06:30:48,769 INFO L276 IsEmpty]: Start isEmpty. Operand 46666 states and 193173 transitions. [2021-06-05 06:30:48,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:48,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:48,862 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:49,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:49,064 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:49,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:49,064 INFO L82 PathProgramCache]: Analyzing trace with hash 656190949, now seen corresponding path program 108 times [2021-06-05 06:30:49,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:49,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648999255] [2021-06-05 06:30:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:49,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:49,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648999255] [2021-06-05 06:30:49,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648999255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:49,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019049826] [2021-06-05 06:30:49,772 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:49,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:30:49,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:49,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 06:30:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:50,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:30:50,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:50,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:50,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:50,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:38 [2021-06-05 06:30:50,067 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:30:50,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 06:30:50,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:50,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:50,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:50,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-06-05 06:30:50,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:50,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:30:50,101 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:30:50,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:50,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:30:50,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:30:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:50,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019049826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:50,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:50,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:30:50,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679796566] [2021-06-05 06:30:50,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:30:50,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:50,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:30:50,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:30:50,159 INFO L87 Difference]: Start difference. First operand 46666 states and 193173 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2021-06-05 06:30:52,661 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-06-05 06:30:53,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:53,121 INFO L93 Difference]: Finished difference Result 80018 states and 326348 transitions. [2021-06-05 06:30:53,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:30:53,121 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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 39 [2021-06-05 06:30:53,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:53,354 INFO L225 Difference]: With dead ends: 80018 [2021-06-05 06:30:53,354 INFO L226 Difference]: Without dead ends: 79854 [2021-06-05 06:30:53,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 2201.3ms TimeCoverageRelationStatistics Valid=501, Invalid=2469, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:30:53,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79854 states. [2021-06-05 06:30:54,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79854 to 46968. [2021-06-05 06:30:54,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46968 states, 46967 states have (on average 4.137905337790364) internal successors, (194345), 46967 states have internal predecessors, (194345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46968 states to 46968 states and 194345 transitions. [2021-06-05 06:30:54,677 INFO L78 Accepts]: Start accepts. Automaton has 46968 states and 194345 transitions. Word has length 39 [2021-06-05 06:30:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:54,677 INFO L482 AbstractCegarLoop]: Abstraction has 46968 states and 194345 transitions. [2021-06-05 06:30:54,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2021-06-05 06:30:54,677 INFO L276 IsEmpty]: Start isEmpty. Operand 46968 states and 194345 transitions. [2021-06-05 06:30:54,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:54,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:54,768 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:54,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 06:30:54,968 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:54,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:54,969 INFO L82 PathProgramCache]: Analyzing trace with hash -941570975, now seen corresponding path program 109 times [2021-06-05 06:30:54,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:54,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926283364] [2021-06-05 06:30:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:55,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:55,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926283364] [2021-06-05 06:30:55,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926283364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:55,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857724790] [2021-06-05 06:30:55,288 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:55,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:30:55,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:55,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:30:55,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:55,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:55,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:55,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:30:55,576 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:30:55,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:30:55,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:55,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:55,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:30:55,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:30:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:55,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857724790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:55,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:55,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:30:55,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226751075] [2021-06-05 06:30:55,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:30:55,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:55,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:30:55,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:30:55,625 INFO L87 Difference]: Start difference. First operand 46968 states and 194345 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:30:56,431 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-06-05 06:30:57,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:57,875 INFO L93 Difference]: Finished difference Result 107264 states and 435928 transitions. [2021-06-05 06:30:57,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:30:57,876 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:30:57,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:58,226 INFO L225 Difference]: With dead ends: 107264 [2021-06-05 06:30:58,226 INFO L226 Difference]: Without dead ends: 107128 [2021-06-05 06:30:58,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1408.7ms TimeCoverageRelationStatistics Valid=385, Invalid=1871, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:30:58,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107128 states. [2021-06-05 06:31:00,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107128 to 46468. [2021-06-05 06:31:00,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46468 states, 46467 states have (on average 4.140766565519616) internal successors, (192409), 46467 states have internal predecessors, (192409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:00,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46468 states to 46468 states and 192409 transitions. [2021-06-05 06:31:00,249 INFO L78 Accepts]: Start accepts. Automaton has 46468 states and 192409 transitions. Word has length 39 [2021-06-05 06:31:00,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:00,249 INFO L482 AbstractCegarLoop]: Abstraction has 46468 states and 192409 transitions. [2021-06-05 06:31:00,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:31:00,249 INFO L276 IsEmpty]: Start isEmpty. Operand 46468 states and 192409 transitions. [2021-06-05 06:31:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:00,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:00,331 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:00,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:00,532 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:00,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:00,532 INFO L82 PathProgramCache]: Analyzing trace with hash -6081193, now seen corresponding path program 110 times [2021-06-05 06:31:00,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:00,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653371368] [2021-06-05 06:31:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:00,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:00,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653371368] [2021-06-05 06:31:00,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653371368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:00,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239124558] [2021-06-05 06:31:00,867 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:00,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:31:00,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:00,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:31:00,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:01,096 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:31:01,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:31:01,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:01,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:01,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:01,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 06:31:01,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:31:01,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:01,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:01,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:01,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:31:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:01,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239124558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:01,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:01,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:31:01,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233797403] [2021-06-05 06:31:01,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:31:01,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:01,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:31:01,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:31:01,213 INFO L87 Difference]: Start difference. First operand 46468 states and 192409 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:31:02,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:02,961 INFO L93 Difference]: Finished difference Result 75585 states and 309501 transitions. [2021-06-05 06:31:02,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:31:02,962 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:31:02,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:03,187 INFO L225 Difference]: With dead ends: 75585 [2021-06-05 06:31:03,187 INFO L226 Difference]: Without dead ends: 75393 [2021-06-05 06:31:03,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1026.3ms TimeCoverageRelationStatistics Valid=311, Invalid=1411, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:31:03,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75393 states. [2021-06-05 06:31:04,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75393 to 46492. [2021-06-05 06:31:04,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46492 states, 46491 states have (on average 4.14043578326988) internal successors, (192493), 46491 states have internal predecessors, (192493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:04,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46492 states to 46492 states and 192493 transitions. [2021-06-05 06:31:04,522 INFO L78 Accepts]: Start accepts. Automaton has 46492 states and 192493 transitions. Word has length 39 [2021-06-05 06:31:04,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:04,522 INFO L482 AbstractCegarLoop]: Abstraction has 46492 states and 192493 transitions. [2021-06-05 06:31:04,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:31:04,523 INFO L276 IsEmpty]: Start isEmpty. Operand 46492 states and 192493 transitions. [2021-06-05 06:31:04,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:04,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:04,608 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:04,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2021-06-05 06:31:04,813 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:04,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:04,813 INFO L82 PathProgramCache]: Analyzing trace with hash 2143700845, now seen corresponding path program 111 times [2021-06-05 06:31:04,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:04,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299106562] [2021-06-05 06:31:04,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:05,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:05,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299106562] [2021-06-05 06:31:05,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299106562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:05,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745237393] [2021-06-05 06:31:05,163 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:05,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:31:05,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:05,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 06:31:05,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:05,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:05,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:05,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-06-05 06:31:05,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:05,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:05,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:05,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:106 [2021-06-05 06:31:05,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:05,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 06:31:05,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:05,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:05,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:05,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:40 [2021-06-05 06:31:05,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:05,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:31:05,728 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:31:05,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:05,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:31:05,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:05,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:05,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:05,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2021-06-05 06:31:05,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:05,784 INFO L628 ElimStorePlain]: treesize reduction 46, result has 50.0 percent of original size [2021-06-05 06:31:05,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:31:05,787 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:123, output treesize:47 [2021-06-05 06:31:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:05,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745237393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:05,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:05,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-05 06:31:05,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654418550] [2021-06-05 06:31:05,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:31:05,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:05,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:31:05,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:31:05,958 INFO L87 Difference]: Start difference. First operand 46492 states and 192493 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:06,392 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-06-05 06:31:07,024 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-06-05 06:31:10,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:10,308 INFO L93 Difference]: Finished difference Result 73353 states and 298508 transitions. [2021-06-05 06:31:10,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:31:10,308 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:31:10,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:10,514 INFO L225 Difference]: With dead ends: 73353 [2021-06-05 06:31:10,514 INFO L226 Difference]: Without dead ends: 73205 [2021-06-05 06:31:10,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 3742.4ms TimeCoverageRelationStatistics Valid=819, Invalid=4293, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 06:31:10,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73205 states. [2021-06-05 06:31:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73205 to 46786. [2021-06-05 06:31:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46786 states, 46785 states have (on average 4.13728759217698) internal successors, (193563), 46785 states have internal predecessors, (193563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46786 states to 46786 states and 193563 transitions. [2021-06-05 06:31:11,734 INFO L78 Accepts]: Start accepts. Automaton has 46786 states and 193563 transitions. Word has length 39 [2021-06-05 06:31:11,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:11,734 INFO L482 AbstractCegarLoop]: Abstraction has 46786 states and 193563 transitions. [2021-06-05 06:31:11,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:11,734 INFO L276 IsEmpty]: Start isEmpty. Operand 46786 states and 193563 transitions. [2021-06-05 06:31:11,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:11,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:11,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:12,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable535,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:12,020 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:12,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:12,021 INFO L82 PathProgramCache]: Analyzing trace with hash 461863935, now seen corresponding path program 112 times [2021-06-05 06:31:12,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:12,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154516550] [2021-06-05 06:31:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:12,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:12,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154516550] [2021-06-05 06:31:12,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154516550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:12,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971687735] [2021-06-05 06:31:12,354 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:12,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:31:12,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:12,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:31:12,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:12,612 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:31:12,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 06:31:12,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:12,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:12,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:12,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 06:31:12,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:31:12,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:12,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:12,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:12,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:31:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:12,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971687735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:12,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:12,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:31:12,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404394864] [2021-06-05 06:31:12,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:31:12,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:12,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:31:12,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:31:12,701 INFO L87 Difference]: Start difference. First operand 46786 states and 193563 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:31:14,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:14,939 INFO L93 Difference]: Finished difference Result 90997 states and 370071 transitions. [2021-06-05 06:31:14,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:31:14,939 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:31:14,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:15,213 INFO L225 Difference]: With dead ends: 90997 [2021-06-05 06:31:15,214 INFO L226 Difference]: Without dead ends: 90773 [2021-06-05 06:31:15,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1244.0ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:31:15,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90773 states. [2021-06-05 06:31:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90773 to 46678. [2021-06-05 06:31:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46678 states, 46677 states have (on average 4.138933521863016) internal successors, (193193), 46677 states have internal predecessors, (193193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:16,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46678 states to 46678 states and 193193 transitions. [2021-06-05 06:31:16,765 INFO L78 Accepts]: Start accepts. Automaton has 46678 states and 193193 transitions. Word has length 39 [2021-06-05 06:31:16,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:16,765 INFO L482 AbstractCegarLoop]: Abstraction has 46678 states and 193193 transitions. [2021-06-05 06:31:16,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:31:16,765 INFO L276 IsEmpty]: Start isEmpty. Operand 46678 states and 193193 transitions. [2021-06-05 06:31:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:16,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:16,852 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:17,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-05 06:31:17,053 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:17,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:17,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1820000131, now seen corresponding path program 113 times [2021-06-05 06:31:17,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:17,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605484953] [2021-06-05 06:31:17,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:17,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:17,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605484953] [2021-06-05 06:31:17,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605484953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:17,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731352720] [2021-06-05 06:31:17,772 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:17,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:31:17,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:17,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:31:17,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:18,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:31:18,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:18,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:18,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:18,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:47 [2021-06-05 06:31:18,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:18,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:18,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:18,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:18,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:31:18,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:31:18,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:18,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:18,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:28 [2021-06-05 06:31:18,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:18,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-06-05 06:31:18,256 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:31:18,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:18,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:31:18,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-06-05 06:31:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:18,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731352720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:18,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:18,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:31:18,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068692220] [2021-06-05 06:31:18,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:31:18,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:18,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:31:18,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:31:18,332 INFO L87 Difference]: Start difference. First operand 46678 states and 193193 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:31:22,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:22,480 INFO L93 Difference]: Finished difference Result 106169 states and 432121 transitions. [2021-06-05 06:31:22,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:31:22,481 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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 39 [2021-06-05 06:31:22,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:22,819 INFO L225 Difference]: With dead ends: 106169 [2021-06-05 06:31:22,819 INFO L226 Difference]: Without dead ends: 105778 [2021-06-05 06:31:22,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 2568.9ms TimeCoverageRelationStatistics Valid=807, Invalid=4449, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 06:31:22,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105778 states. [2021-06-05 06:31:24,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105778 to 46688. [2021-06-05 06:31:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46688 states, 46687 states have (on average 4.138646732495127) internal successors, (193221), 46687 states have internal predecessors, (193221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:24,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46688 states to 46688 states and 193221 transitions. [2021-06-05 06:31:24,832 INFO L78 Accepts]: Start accepts. Automaton has 46688 states and 193221 transitions. Word has length 39 [2021-06-05 06:31:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:24,832 INFO L482 AbstractCegarLoop]: Abstraction has 46688 states and 193221 transitions. [2021-06-05 06:31:24,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:31:24,833 INFO L276 IsEmpty]: Start isEmpty. Operand 46688 states and 193221 transitions. [2021-06-05 06:31:24,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:24,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:24,926 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:25,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:25,126 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:25,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:25,127 INFO L82 PathProgramCache]: Analyzing trace with hash 2023920877, now seen corresponding path program 114 times [2021-06-05 06:31:25,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:25,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567017365] [2021-06-05 06:31:25,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:25,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:25,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567017365] [2021-06-05 06:31:25,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567017365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:25,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909350108] [2021-06-05 06:31:25,453 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:25,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:31:25,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:25,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 06:31:25,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:25,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:31:25,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:25,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:25,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:25,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:38 [2021-06-05 06:31:25,753 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:31:25,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 06:31:25,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:25,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:25,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:25,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-06-05 06:31:25,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:25,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:31:25,786 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:31:25,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:25,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:31:25,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:31:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:25,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909350108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:25,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:25,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 06:31:25,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907218238] [2021-06-05 06:31:25,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:31:25,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:25,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:31:25,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:31:25,843 INFO L87 Difference]: Start difference. First operand 46688 states and 193221 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2021-06-05 06:31:27,644 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-06-05 06:31:28,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:28,487 INFO L93 Difference]: Finished difference Result 78548 states and 320447 transitions. [2021-06-05 06:31:28,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:31:28,487 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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 39 [2021-06-05 06:31:28,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:28,731 INFO L225 Difference]: With dead ends: 78548 [2021-06-05 06:31:28,731 INFO L226 Difference]: Without dead ends: 78384 [2021-06-05 06:31:28,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1748.6ms TimeCoverageRelationStatistics Valid=510, Invalid=2246, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:31:28,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78384 states. [2021-06-05 06:31:29,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78384 to 46792. [2021-06-05 06:31:29,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46792 states, 46791 states have (on average 4.1385950289585605) internal successors, (193649), 46791 states have internal predecessors, (193649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46792 states to 46792 states and 193649 transitions. [2021-06-05 06:31:30,134 INFO L78 Accepts]: Start accepts. Automaton has 46792 states and 193649 transitions. Word has length 39 [2021-06-05 06:31:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:30,134 INFO L482 AbstractCegarLoop]: Abstraction has 46792 states and 193649 transitions. [2021-06-05 06:31:30,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 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) [2021-06-05 06:31:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 46792 states and 193649 transitions. [2021-06-05 06:31:30,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:30,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:30,227 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:30,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:30,427 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:30,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:30,428 INFO L82 PathProgramCache]: Analyzing trace with hash 426158953, now seen corresponding path program 115 times [2021-06-05 06:31:30,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:30,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917395050] [2021-06-05 06:31:30,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:30,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:30,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917395050] [2021-06-05 06:31:30,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917395050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:30,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419666947] [2021-06-05 06:31:30,756 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:30,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:31:30,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:31,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:31:31,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:31,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:31,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:31,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 06:31:31,390 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:31:31,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:31:31,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:31,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:31,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:31,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:31:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:31,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419666947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:31,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:31,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:31:31,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778064521] [2021-06-05 06:31:31,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:31:31,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:31,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:31:31,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:31:31,447 INFO L87 Difference]: Start difference. First operand 46792 states and 193649 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:31:33,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:33,285 INFO L93 Difference]: Finished difference Result 107329 states and 436087 transitions. [2021-06-05 06:31:33,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:31:33,290 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:31:33,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:34,019 INFO L225 Difference]: With dead ends: 107329 [2021-06-05 06:31:34,019 INFO L226 Difference]: Without dead ends: 107209 [2021-06-05 06:31:34,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1184.3ms TimeCoverageRelationStatistics Valid=387, Invalid=1775, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:31:34,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107209 states. [2021-06-05 06:31:35,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107209 to 46488. [2021-06-05 06:31:35,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46488 states, 46487 states have (on average 4.140490889926216) internal successors, (192479), 46487 states have internal predecessors, (192479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:35,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46488 states to 46488 states and 192479 transitions. [2021-06-05 06:31:35,618 INFO L78 Accepts]: Start accepts. Automaton has 46488 states and 192479 transitions. Word has length 39 [2021-06-05 06:31:35,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:35,618 INFO L482 AbstractCegarLoop]: Abstraction has 46488 states and 192479 transitions. [2021-06-05 06:31:35,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:31:35,618 INFO L276 IsEmpty]: Start isEmpty. Operand 46488 states and 192479 transitions. [2021-06-05 06:31:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:35,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:35,709 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:35,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-05 06:31:35,909 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:35,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:35,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1314265319, now seen corresponding path program 116 times [2021-06-05 06:31:35,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:35,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876461677] [2021-06-05 06:31:35,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:36,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:36,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876461677] [2021-06-05 06:31:36,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876461677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:36,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846083851] [2021-06-05 06:31:36,228 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:36,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:31:36,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:36,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:31:36,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:36,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:31:36,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:36,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:36,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:36,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:31:36,491 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:31:36,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 06:31:36,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:36,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:36,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:36,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 06:31:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:36,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846083851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:36,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:36,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:31:36,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043394256] [2021-06-05 06:31:36,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:31:36,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:36,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:31:36,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:31:36,556 INFO L87 Difference]: Start difference. First operand 46488 states and 192479 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:38,574 INFO L93 Difference]: Finished difference Result 85981 states and 351800 transitions. [2021-06-05 06:31:38,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:31:38,574 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 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 39 [2021-06-05 06:31:38,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:38,842 INFO L225 Difference]: With dead ends: 85981 [2021-06-05 06:31:38,842 INFO L226 Difference]: Without dead ends: 85907 [2021-06-05 06:31:38,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1024.8ms TimeCoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:31:38,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85907 states. [2021-06-05 06:31:40,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85907 to 45844. [2021-06-05 06:31:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45844 states, 45843 states have (on average 4.14133019217765) internal successors, (189851), 45843 states have internal predecessors, (189851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45844 states to 45844 states and 189851 transitions. [2021-06-05 06:31:40,436 INFO L78 Accepts]: Start accepts. Automaton has 45844 states and 189851 transitions. Word has length 39 [2021-06-05 06:31:40,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:40,436 INFO L482 AbstractCegarLoop]: Abstraction has 45844 states and 189851 transitions. [2021-06-05 06:31:40,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:40,436 INFO L276 IsEmpty]: Start isEmpty. Operand 45844 states and 189851 transitions. [2021-06-05 06:31:40,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:40,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:40,526 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:40,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-06-05 06:31:40,727 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:40,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:40,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1040958189, now seen corresponding path program 117 times [2021-06-05 06:31:40,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:40,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940939333] [2021-06-05 06:31:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:40,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:40,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940939333] [2021-06-05 06:31:40,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940939333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:40,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463322089] [2021-06-05 06:31:40,987 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:41,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:31:41,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:41,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:31:41,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:41,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:31:41,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:41,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:41,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:41,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-06-05 06:31:41,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:31:41,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:41,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 06:31:41,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:41,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:41,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:31:41,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:75 [2021-06-05 06:31:41,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:41,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:31:41,388 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:31:41,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:41,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:41,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:31:41,426 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:31:41,857 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-06-05 06:31:41,857 INFO L628 ElimStorePlain]: treesize reduction 10, result has 82.1 percent of original size [2021-06-05 06:31:41,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:31:41,861 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-06-05 06:31:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:42,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463322089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:42,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:42,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:31:42,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592277009] [2021-06-05 06:31:42,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:31:42,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:42,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:31:42,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:31:42,010 INFO L87 Difference]: Start difference. First operand 45844 states and 189851 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:31:45,553 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-05 06:31:48,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:48,454 INFO L93 Difference]: Finished difference Result 127734 states and 517956 transitions. [2021-06-05 06:31:48,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 06:31:48,455 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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 39 [2021-06-05 06:31:48,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:48,882 INFO L225 Difference]: With dead ends: 127734 [2021-06-05 06:31:48,883 INFO L226 Difference]: Without dead ends: 127592 [2021-06-05 06:31:48,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3048 ImplicationChecksByTransitivity, 4824.1ms TimeCoverageRelationStatistics Valid=1470, Invalid=7650, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 06:31:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127592 states. [2021-06-05 06:31:50,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127592 to 46289. [2021-06-05 06:31:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46289 states, 46288 states have (on average 4.144292257172485) internal successors, (191831), 46288 states have internal predecessors, (191831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:50,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46289 states to 46289 states and 191831 transitions. [2021-06-05 06:31:50,725 INFO L78 Accepts]: Start accepts. Automaton has 46289 states and 191831 transitions. Word has length 39 [2021-06-05 06:31:50,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:50,725 INFO L482 AbstractCegarLoop]: Abstraction has 46289 states and 191831 transitions. [2021-06-05 06:31:50,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2021-06-05 06:31:50,725 INFO L276 IsEmpty]: Start isEmpty. Operand 46289 states and 191831 transitions. [2021-06-05 06:31:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:50,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:50,817 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:51,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-05 06:31:51,017 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:51,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:51,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1790054465, now seen corresponding path program 118 times [2021-06-05 06:31:51,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:51,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720425132] [2021-06-05 06:31:51,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:51,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:51,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720425132] [2021-06-05 06:31:51,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720425132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:51,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113419562] [2021-06-05 06:31:51,283 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:51,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:31:51,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:51,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:31:51,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:51,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:31:51,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:51,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:51,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:51,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:31:51,570 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:31:51,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:31:51,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:51,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:51,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:51,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:31:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:51,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113419562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:51,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:51,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:31:51,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375369779] [2021-06-05 06:31:51,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:31:51,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:51,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:31:51,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:31:51,611 INFO L87 Difference]: Start difference. First operand 46289 states and 191831 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:53,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:31:53,962 INFO L93 Difference]: Finished difference Result 102255 states and 417916 transitions. [2021-06-05 06:31:53,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:31:53,963 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 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 39 [2021-06-05 06:31:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:31:54,656 INFO L225 Difference]: With dead ends: 102255 [2021-06-05 06:31:54,656 INFO L226 Difference]: Without dead ends: 102200 [2021-06-05 06:31:54,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1097.4ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:31:54,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102200 states. [2021-06-05 06:31:55,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102200 to 45254. [2021-06-05 06:31:56,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45254 states, 45253 states have (on average 4.142067929198064) internal successors, (187441), 45253 states have internal predecessors, (187441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45254 states to 45254 states and 187441 transitions. [2021-06-05 06:31:56,184 INFO L78 Accepts]: Start accepts. Automaton has 45254 states and 187441 transitions. Word has length 39 [2021-06-05 06:31:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:31:56,185 INFO L482 AbstractCegarLoop]: Abstraction has 45254 states and 187441 transitions. [2021-06-05 06:31:56,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:31:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 45254 states and 187441 transitions. [2021-06-05 06:31:56,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:31:56,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:31:56,272 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:31:56,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:56,477 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:31:56,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:31:56,477 INFO L82 PathProgramCache]: Analyzing trace with hash -956397167, now seen corresponding path program 119 times [2021-06-05 06:31:56,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:31:56,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894289317] [2021-06-05 06:31:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:31:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:31:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:56,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:31:56,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894289317] [2021-06-05 06:31:56,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894289317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:56,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147713988] [2021-06-05 06:31:56,764 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:31:56,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:31:56,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:31:56,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 06:31:56,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:31:56,977 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:31:56,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:31:56,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:56,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:56,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:56,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 06:31:57,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:31:57,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:31:57,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:57,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:57,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:21 [2021-06-05 06:31:57,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:31:57,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:31:57,156 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:31:57,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:31:57,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:31:57,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:3 [2021-06-05 06:31:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:31:57,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147713988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:31:57,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:31:57,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:31:57,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307102469] [2021-06-05 06:31:57,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:31:57,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:31:57,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:31:57,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:31:57,180 INFO L87 Difference]: Start difference. First operand 45254 states and 187441 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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) [2021-06-05 06:32:00,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:00,093 INFO L93 Difference]: Finished difference Result 81723 states and 334647 transitions. [2021-06-05 06:32:00,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:32:00,093 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 39 [2021-06-05 06:32:00,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:00,335 INFO L225 Difference]: With dead ends: 81723 [2021-06-05 06:32:00,335 INFO L226 Difference]: Without dead ends: 81668 [2021-06-05 06:32:00,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1718.2ms TimeCoverageRelationStatistics Valid=373, Invalid=2597, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:32:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81668 states. [2021-06-05 06:32:01,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81668 to 45794. [2021-06-05 06:32:01,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45794 states, 45793 states have (on average 4.140611010416439) internal successors, (189611), 45793 states have internal predecessors, (189611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45794 states to 45794 states and 189611 transitions. [2021-06-05 06:32:01,758 INFO L78 Accepts]: Start accepts. Automaton has 45794 states and 189611 transitions. Word has length 39 [2021-06-05 06:32:01,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:01,758 INFO L482 AbstractCegarLoop]: Abstraction has 45794 states and 189611 transitions. [2021-06-05 06:32:01,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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) [2021-06-05 06:32:01,758 INFO L276 IsEmpty]: Start isEmpty. Operand 45794 states and 189611 transitions. [2021-06-05 06:32:01,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:01,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:01,846 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:02,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:02,049 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:02,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:02,049 INFO L82 PathProgramCache]: Analyzing trace with hash 978122307, now seen corresponding path program 120 times [2021-06-05 06:32:02,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:02,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216827439] [2021-06-05 06:32:02,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:02,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:02,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216827439] [2021-06-05 06:32:02,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216827439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:02,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47273221] [2021-06-05 06:32:02,700 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:02,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:32:02,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:02,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 06:32:02,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:02,942 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:32:02,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:32:02,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:02,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:02,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:02,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-06-05 06:32:03,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:03,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 06:32:03,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:03,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:03,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:03,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-06-05 06:32:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:03,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47273221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:03,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:03,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 06:32:03,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210210169] [2021-06-05 06:32:03,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:32:03,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:03,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:32:03,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:32:03,171 INFO L87 Difference]: Start difference. First operand 45794 states and 189611 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:05,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:05,637 INFO L93 Difference]: Finished difference Result 75508 states and 307916 transitions. [2021-06-05 06:32:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:32:05,637 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:32:05,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:05,881 INFO L225 Difference]: With dead ends: 75508 [2021-06-05 06:32:05,881 INFO L226 Difference]: Without dead ends: 75418 [2021-06-05 06:32:05,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1579.1ms TimeCoverageRelationStatistics Valid=429, Invalid=1551, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:32:05,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75418 states. [2021-06-05 06:32:07,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75418 to 46130. [2021-06-05 06:32:07,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46130 states, 46129 states have (on average 4.137332263868716) internal successors, (190851), 46129 states have internal predecessors, (190851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:07,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46130 states to 46130 states and 190851 transitions. [2021-06-05 06:32:07,291 INFO L78 Accepts]: Start accepts. Automaton has 46130 states and 190851 transitions. Word has length 39 [2021-06-05 06:32:07,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:07,291 INFO L482 AbstractCegarLoop]: Abstraction has 46130 states and 190851 transitions. [2021-06-05 06:32:07,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:07,291 INFO L276 IsEmpty]: Start isEmpty. Operand 46130 states and 190851 transitions. [2021-06-05 06:32:07,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:07,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:07,393 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:07,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-06-05 06:32:07,593 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:07,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:07,594 INFO L82 PathProgramCache]: Analyzing trace with hash -703714603, now seen corresponding path program 121 times [2021-06-05 06:32:07,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:07,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415173371] [2021-06-05 06:32:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:07,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:07,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415173371] [2021-06-05 06:32:07,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415173371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:07,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967301300] [2021-06-05 06:32:07,908 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:07,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:32:07,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:08,112 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:32:08,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:32:08,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:08,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:08,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:08,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 06:32:08,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:32:08,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:08,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:08,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:08,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:32:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:08,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967301300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:08,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:08,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:32:08,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816681325] [2021-06-05 06:32:08,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:32:08,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:08,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:32:08,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:32:08,261 INFO L87 Difference]: Start difference. First operand 46130 states and 190851 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:32:10,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:10,748 INFO L93 Difference]: Finished difference Result 93119 states and 378680 transitions. [2021-06-05 06:32:10,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:32:10,749 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:32:10,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:11,022 INFO L225 Difference]: With dead ends: 93119 [2021-06-05 06:32:11,023 INFO L226 Difference]: Without dead ends: 92863 [2021-06-05 06:32:11,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1493.5ms TimeCoverageRelationStatistics Valid=524, Invalid=2446, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:32:11,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92863 states. [2021-06-05 06:32:12,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92863 to 45865. [2021-06-05 06:32:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45865 states, 45864 states have (on average 4.141156462585034) internal successors, (189930), 45864 states have internal predecessors, (189930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45865 states to 45865 states and 189930 transitions. [2021-06-05 06:32:12,557 INFO L78 Accepts]: Start accepts. Automaton has 45865 states and 189930 transitions. Word has length 39 [2021-06-05 06:32:12,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:12,557 INFO L482 AbstractCegarLoop]: Abstraction has 45865 states and 189930 transitions. [2021-06-05 06:32:12,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:32:12,558 INFO L276 IsEmpty]: Start isEmpty. Operand 45865 states and 189930 transitions. [2021-06-05 06:32:12,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:12,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:12,637 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:12,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 06:32:12,838 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:12,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:12,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1581231163, now seen corresponding path program 122 times [2021-06-05 06:32:12,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:12,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725947348] [2021-06-05 06:32:12,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:13,256 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-06-05 06:32:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:13,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:13,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725947348] [2021-06-05 06:32:13,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725947348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:13,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333117266] [2021-06-05 06:32:13,532 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:13,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:32:13,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:13,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:32:13,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:13,740 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:32:13,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:32:13,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:13,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:13,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:13,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 06:32:13,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:32:13,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:13,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:13,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:13,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:32:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:13,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333117266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:13,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:13,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:32:13,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986386681] [2021-06-05 06:32:13,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:32:13,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:13,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:32:13,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:32:13,889 INFO L87 Difference]: Start difference. First operand 45865 states and 189930 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:32:15,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:15,843 INFO L93 Difference]: Finished difference Result 77133 states and 315782 transitions. [2021-06-05 06:32:15,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:32:15,844 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:32:15,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:16,067 INFO L225 Difference]: With dead ends: 77133 [2021-06-05 06:32:16,068 INFO L226 Difference]: Without dead ends: 76941 [2021-06-05 06:32:16,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1533.9ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:32:16,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76941 states. [2021-06-05 06:32:17,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76941 to 45865. [2021-06-05 06:32:17,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45865 states, 45864 states have (on average 4.141156462585034) internal successors, (189930), 45864 states have internal predecessors, (189930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45865 states to 45865 states and 189930 transitions. [2021-06-05 06:32:17,432 INFO L78 Accepts]: Start accepts. Automaton has 45865 states and 189930 transitions. Word has length 39 [2021-06-05 06:32:17,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:17,432 INFO L482 AbstractCegarLoop]: Abstraction has 45865 states and 189930 transitions. [2021-06-05 06:32:17,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:32:17,432 INFO L276 IsEmpty]: Start isEmpty. Operand 45865 states and 189930 transitions. [2021-06-05 06:32:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:17,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:17,520 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:17,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-05 06:32:17,721 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:17,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:17,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1486083717, now seen corresponding path program 123 times [2021-06-05 06:32:17,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:17,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971411533] [2021-06-05 06:32:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:18,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:18,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971411533] [2021-06-05 06:32:18,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971411533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:18,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589482333] [2021-06-05 06:32:18,000 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:18,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:32:18,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:18,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:32:18,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:18,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:18,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:18,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-06-05 06:32:18,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:18,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:18,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:18,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:60 [2021-06-05 06:32:18,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:18,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:18,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 06:32:18,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:18,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:18,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:18,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:18 [2021-06-05 06:32:18,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:18,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:32:18,576 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:32:18,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:18,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:32:18,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:32:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:18,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589482333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:18,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:18,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:32:18,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876860024] [2021-06-05 06:32:18,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:32:18,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:18,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:32:18,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:32:18,627 INFO L87 Difference]: Start difference. First operand 45865 states and 189930 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:22,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:22,426 INFO L93 Difference]: Finished difference Result 85055 states and 348299 transitions. [2021-06-05 06:32:22,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 06:32:22,426 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:32:22,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:22,950 INFO L225 Difference]: With dead ends: 85055 [2021-06-05 06:32:22,951 INFO L226 Difference]: Without dead ends: 85004 [2021-06-05 06:32:22,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 2158.6ms TimeCoverageRelationStatistics Valid=602, Invalid=4228, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:32:23,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85004 states. [2021-06-05 06:32:24,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85004 to 46158. [2021-06-05 06:32:24,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46158 states, 46157 states have (on average 4.139697120696752) internal successors, (191076), 46157 states have internal predecessors, (191076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46158 states to 46158 states and 191076 transitions. [2021-06-05 06:32:24,394 INFO L78 Accepts]: Start accepts. Automaton has 46158 states and 191076 transitions. Word has length 39 [2021-06-05 06:32:24,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:24,395 INFO L482 AbstractCegarLoop]: Abstraction has 46158 states and 191076 transitions. [2021-06-05 06:32:24,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:24,395 INFO L276 IsEmpty]: Start isEmpty. Operand 46158 states and 191076 transitions. [2021-06-05 06:32:24,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:24,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:24,485 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:24,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:24,686 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:24,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:24,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1991827753, now seen corresponding path program 124 times [2021-06-05 06:32:24,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:24,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251437544] [2021-06-05 06:32:24,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:24,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:24,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251437544] [2021-06-05 06:32:24,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251437544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:24,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497121307] [2021-06-05 06:32:24,983 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:25,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:32:25,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:25,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:32:25,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:25,204 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:32:25,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:32:25,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:25,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:25,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:25,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 06:32:25,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:32:25,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:25,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:25,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:25,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 06:32:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:25,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497121307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:25,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:25,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:32:25,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441320292] [2021-06-05 06:32:25,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:32:25,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:25,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:32:25,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:32:25,318 INFO L87 Difference]: Start difference. First operand 46158 states and 191076 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:32:27,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:27,417 INFO L93 Difference]: Finished difference Result 78941 states and 322728 transitions. [2021-06-05 06:32:27,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:32:27,417 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 39 [2021-06-05 06:32:27,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:27,651 INFO L225 Difference]: With dead ends: 78941 [2021-06-05 06:32:27,651 INFO L226 Difference]: Without dead ends: 78725 [2021-06-05 06:32:27,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1542.2ms TimeCoverageRelationStatistics Valid=415, Invalid=1841, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:32:27,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78725 states. [2021-06-05 06:32:28,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78725 to 46162. [2021-06-05 06:32:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46162 states, 46161 states have (on average 4.13925174931219) internal successors, (191072), 46161 states have internal predecessors, (191072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46162 states to 46162 states and 191072 transitions. [2021-06-05 06:32:29,003 INFO L78 Accepts]: Start accepts. Automaton has 46162 states and 191072 transitions. Word has length 39 [2021-06-05 06:32:29,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:29,003 INFO L482 AbstractCegarLoop]: Abstraction has 46162 states and 191072 transitions. [2021-06-05 06:32:29,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-06-05 06:32:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 46162 states and 191072 transitions. [2021-06-05 06:32:29,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:29,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:29,088 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:29,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-06-05 06:32:29,289 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:29,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:29,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1651652727, now seen corresponding path program 125 times [2021-06-05 06:32:29,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:29,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833107275] [2021-06-05 06:32:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:29,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:29,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833107275] [2021-06-05 06:32:29,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833107275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:29,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104778891] [2021-06-05 06:32:29,561 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:29,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:32:29,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:29,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:32:29,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:29,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:32:29,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:29,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:29,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:29,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-05 06:32:29,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:29,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:29,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:32:29,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:29,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:29,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:29,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:53, output treesize:21 [2021-06-05 06:32:30,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:32:30,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 06:32:30,046 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:32:30,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:30,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:30,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:3 [2021-06-05 06:32:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:30,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104778891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:30,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:30,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:32:30,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75055194] [2021-06-05 06:32:30,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:32:30,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:30,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:32:30,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:32:30,068 INFO L87 Difference]: Start difference. First operand 46162 states and 191072 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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) [2021-06-05 06:32:30,471 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-06-05 06:32:33,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:33,508 INFO L93 Difference]: Finished difference Result 81524 states and 333283 transitions. [2021-06-05 06:32:33,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:32:33,509 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 39 [2021-06-05 06:32:33,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:33,746 INFO L225 Difference]: With dead ends: 81524 [2021-06-05 06:32:33,746 INFO L226 Difference]: Without dead ends: 81469 [2021-06-05 06:32:33,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 2026.4ms TimeCoverageRelationStatistics Valid=442, Invalid=3218, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:32:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81469 states. [2021-06-05 06:32:34,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81469 to 46478. [2021-06-05 06:32:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46478 states, 46477 states have (on average 4.138821352496934) internal successors, (192360), 46477 states have internal predecessors, (192360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:35,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46478 states to 46478 states and 192360 transitions. [2021-06-05 06:32:35,135 INFO L78 Accepts]: Start accepts. Automaton has 46478 states and 192360 transitions. Word has length 39 [2021-06-05 06:32:35,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:35,135 INFO L482 AbstractCegarLoop]: Abstraction has 46478 states and 192360 transitions. [2021-06-05 06:32:35,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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) [2021-06-05 06:32:35,135 INFO L276 IsEmpty]: Start isEmpty. Operand 46478 states and 192360 transitions. [2021-06-05 06:32:35,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:35,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:35,217 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:35,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-05 06:32:35,418 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:35,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:35,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1014064697, now seen corresponding path program 126 times [2021-06-05 06:32:35,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:35,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438215096] [2021-06-05 06:32:35,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:35,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:35,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438215096] [2021-06-05 06:32:35,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438215096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:35,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619299238] [2021-06-05 06:32:35,693 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:35,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:32:35,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:32:35,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:32:35,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:35,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:32:35,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:35,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:35,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:35,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-06-05 06:32:36,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:32:36,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:36,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 06:32:36,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:36,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:36,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:32:36,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:75 [2021-06-05 06:32:36,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:36,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 06:32:36,089 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:32:36,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:36,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:32:36,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 06:32:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:36,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619299238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:36,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:36,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:32:36,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448374082] [2021-06-05 06:32:36,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:32:36,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:36,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:32:36,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:32:36,139 INFO L87 Difference]: Start difference. First operand 46478 states and 192360 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:37,556 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-06-05 06:32:39,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:32:39,732 INFO L93 Difference]: Finished difference Result 99154 states and 406724 transitions. [2021-06-05 06:32:39,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:32:39,732 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:32:39,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:32:40,357 INFO L225 Difference]: With dead ends: 99154 [2021-06-05 06:32:40,357 INFO L226 Difference]: Without dead ends: 99099 [2021-06-05 06:32:40,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 2299.3ms TimeCoverageRelationStatistics Valid=664, Invalid=4306, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:32:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99099 states. [2021-06-05 06:32:41,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99099 to 46886. [2021-06-05 06:32:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46886 states, 46885 states have (on average 4.139148981550602) internal successors, (194064), 46885 states have internal predecessors, (194064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:41,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46886 states to 46886 states and 194064 transitions. [2021-06-05 06:32:41,923 INFO L78 Accepts]: Start accepts. Automaton has 46886 states and 194064 transitions. Word has length 39 [2021-06-05 06:32:41,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:32:41,923 INFO L482 AbstractCegarLoop]: Abstraction has 46886 states and 194064 transitions. [2021-06-05 06:32:41,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:32:41,923 INFO L276 IsEmpty]: Start isEmpty. Operand 46886 states and 194064 transitions. [2021-06-05 06:32:42,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:32:42,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:32:42,006 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:32:42,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 06:32:42,207 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:32:42,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:32:42,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1861909575, now seen corresponding path program 127 times [2021-06-05 06:32:42,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:32:42,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238871091] [2021-06-05 06:32:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:32:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:42,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:32:42,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238871091] [2021-06-05 06:32:42,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238871091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:42,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978948883] [2021-06-05 06:32:42,475 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:32:42,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:32:42,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:32:42,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 06:32:42,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:42,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:42,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:42,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 06:32:42,780 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:32:42,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:32:42,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:32:42,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:32:42,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:32:42,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 06:32:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:32:42,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978948883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:32:42,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:32:42,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 06:32:42,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928108099] [2021-06-05 06:32:42,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:32:42,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:32:42,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:32:42,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:32:42,817 INFO L87 Difference]: Start difference. First operand 46886 states and 194064 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 06:32:44,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:32:44,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:32:44,988 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 06:32:44,990 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 06:32:44,991 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 06:32:44,991 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:32:44 BasicIcfg [2021-06-05 06:32:44,991 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 06:32:44,991 INFO L168 Benchmark]: Toolchain (without parser) took 710082.08 ms. Allocated memory was 364.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 343.9 MB in the beginning and 10.9 GB in the end (delta: -10.5 GB). Peak memory consumption was 5.1 GB. Max. memory is 16.0 GB. [2021-06-05 06:32:44,992 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 364.9 MB. Free memory was 345.1 MB in the beginning and 345.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:32:44,992 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.69 ms. Allocated memory is still 364.9 MB. Free memory was 343.8 MB in the beginning and 342.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:32:44,992 INFO L168 Benchmark]: Boogie Preprocessor took 19.25 ms. Allocated memory is still 364.9 MB. Free memory was 342.3 MB in the beginning and 341.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:32:44,992 INFO L168 Benchmark]: RCFGBuilder took 364.60 ms. Allocated memory is still 364.9 MB. Free memory was 341.2 MB in the beginning and 325.8 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 06:32:44,992 INFO L168 Benchmark]: TraceAbstraction took 709668.14 ms. Allocated memory was 364.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 325.4 MB in the beginning and 10.9 GB in the end (delta: -10.5 GB). Peak memory consumption was 5.1 GB. Max. memory is 16.0 GB. [2021-06-05 06:32:44,992 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 364.9 MB. Free memory was 345.1 MB in the beginning and 345.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.69 ms. Allocated memory is still 364.9 MB. Free memory was 343.8 MB in the beginning and 342.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 19.25 ms. Allocated memory is still 364.9 MB. Free memory was 342.3 MB in the beginning and 341.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 364.60 ms. Allocated memory is still 364.9 MB. Free memory was 341.2 MB in the beginning and 325.8 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 709668.14 ms. Allocated memory was 364.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 325.4 MB in the beginning and 10.9 GB in the end (delta: -10.5 GB). Peak memory consumption was 5.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (46886states) and FLOYD_HOARE automaton (currently 27 states, 26 states before enhancement),while ReachableStatesComputation was computing reachable states (47891 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (46886states) and FLOYD_HOARE automaton (currently 27 states, 26 states before enhancement),while ReachableStatesComputation was computing reachable states (47891 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (46886states) and FLOYD_HOARE automaton (currently 27 states, 26 states before enhancement),while ReachableStatesComputation was computing reachable states (47891 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (46886states) and FLOYD_HOARE automaton (currently 27 states, 26 states before enhancement),while ReachableStatesComputation was computing reachable states (47891 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (46886states) and FLOYD_HOARE automaton (currently 27 states, 26 states before enhancement),while ReachableStatesComputation was computing reachable states (47891 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 54 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 709519.1ms, OverallIterations: 136, TraceHistogramMax: 2, EmptinessCheckTime: 12082.3ms, AutomataDifference: 393601.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 74.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10214 SDtfs, 64577 SDslu, 118743 SDs, 0 SdLazy, 213469 SolverSat, 12826 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 108744.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10034 GetRequests, 3501 SyntacticMatches, 139 SemanticMatches, 6394 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114257 ImplicationChecksByTransitivity, 239969.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=46968occurred in iteration=117, InterpolantAutomatonStates: 4768, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 163787.9ms AutomataMinimizationTime, 135 MinimizatonAttempts, 4804224 StatesRemovedByMinimization, 135 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 685.2ms SsaConstructionTime, 3290.7ms SatisfiabilityAnalysisTime, 106036.1ms InterpolantComputationTime, 9955 NumberOfCodeBlocks, 9951 NumberOfCodeBlocksAsserted, 484 NumberOfCheckSat, 9689 ConstructedInterpolants, 341 QuantifiedInterpolants, 247188 SizeOfPredicates, 970 NumberOfNonLiveVariables, 14783 ConjunctsInSsa, 4964 ConjunctsInUnsatCore, 266 InterpolantComputations, 8 PerfectInterpolantSequences, 222/4260 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown