/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:29:42,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:29:42,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:29:42,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:29:42,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:29:42,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:29:42,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:29:42,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:29:42,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:29:42,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:29:42,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:29:42,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:29:42,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:29:42,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:29:42,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:29:42,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:29:42,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:29:42,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:29:42,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:29:42,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:29:42,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:29:42,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:29:42,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:29:42,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:29:42,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:29:42,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:29:42,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:29:42,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:29:42,704 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:29:42,718 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:29:42,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:29:42,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:29:42,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:29:42,720 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:29:42,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:29:42,721 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:29:42,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:29:42,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:29:42,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:29:42,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:29:42,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:29:42,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:29:42,722 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:29:42,722 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:29:42,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:29:42,723 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:29:42,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:29:42,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:29:42,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:29:42,724 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:29:42,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:29:42,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:29:42,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:29:42,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:29:42,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:29:42,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:29:42,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:29:42,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:29:42,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:29:43,021 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:29:43,034 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:29:43,038 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:29:43,039 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:29:43,040 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:29:43,041 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init7_ground-2.i [2019-11-23 20:29:43,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76da341c5/902707ab130d4a54b4b303cd87ada3bf/FLAG670862498 [2019-11-23 20:29:43,562 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:29:43,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init7_ground-2.i [2019-11-23 20:29:43,571 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76da341c5/902707ab130d4a54b4b303cd87ada3bf/FLAG670862498 [2019-11-23 20:29:43,982 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76da341c5/902707ab130d4a54b4b303cd87ada3bf [2019-11-23 20:29:43,992 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:29:43,994 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:29:43,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:29:43,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:29:43,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:29:44,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:29:43" (1/1) ... [2019-11-23 20:29:44,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61664b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:44, skipping insertion in model container [2019-11-23 20:29:44,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:29:43" (1/1) ... [2019-11-23 20:29:44,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:29:44,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:29:44,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:29:44,252 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:29:44,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:29:44,403 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:29:44,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:44 WrapperNode [2019-11-23 20:29:44,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:29:44,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:29:44,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:29:44,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:29:44,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:44" (1/1) ... [2019-11-23 20:29:44,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:44" (1/1) ... [2019-11-23 20:29:44,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:29:44,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:29:44,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:29:44,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:29:44,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:44" (1/1) ... [2019-11-23 20:29:44,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:44" (1/1) ... [2019-11-23 20:29:44,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:44" (1/1) ... [2019-11-23 20:29:44,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:44" (1/1) ... [2019-11-23 20:29:44,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:44" (1/1) ... [2019-11-23 20:29:44,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:44" (1/1) ... [2019-11-23 20:29:44,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:44" (1/1) ... [2019-11-23 20:29:44,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:29:44,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:29:44,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:29:44,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:29:44,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:44" (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 [2019-11-23 20:29:44,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:29:44,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:29:44,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:29:44,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:29:44,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:29:44,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:29:44,840 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:29:44,840 INFO L284 CfgBuilder]: Removed 14 assume(true) statements. [2019-11-23 20:29:44,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:29:44 BoogieIcfgContainer [2019-11-23 20:29:44,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:29:44,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:29:44,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:29:44,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:29:44,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:29:43" (1/3) ... [2019-11-23 20:29:44,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@793f7727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:29:44, skipping insertion in model container [2019-11-23 20:29:44,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:44" (2/3) ... [2019-11-23 20:29:44,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@793f7727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:29:44, skipping insertion in model container [2019-11-23 20:29:44,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:29:44" (3/3) ... [2019-11-23 20:29:44,867 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-2.i [2019-11-23 20:29:44,882 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:29:44,889 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:29:44,901 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:29:44,927 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:29:44,927 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:29:44,927 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:29:44,927 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:29:44,927 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:29:44,928 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:29:44,928 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:29:44,928 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:29:44,941 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-23 20:29:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:29:44,948 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:44,949 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:44,950 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:44,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:44,955 INFO L82 PathProgramCache]: Analyzing trace with hash -495328290, now seen corresponding path program 1 times [2019-11-23 20:29:44,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:44,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537411260] [2019-11-23 20:29:44,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:29:45,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537411260] [2019-11-23 20:29:45,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:29:45,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:29:45,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883792751] [2019-11-23 20:29:45,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:29:45,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:45,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:29:45,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:29:45,133 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-11-23 20:29:45,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:45,251 INFO L93 Difference]: Finished difference Result 56 states and 100 transitions. [2019-11-23 20:29:45,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:29:45,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 20:29:45,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:45,266 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:29:45,267 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:29:45,276 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:29:45,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:29:45,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-23 20:29:45,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:29:45,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2019-11-23 20:29:45,314 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2019-11-23 20:29:45,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:45,315 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2019-11-23 20:29:45,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:29:45,315 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2019-11-23 20:29:45,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:29:45,316 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:45,317 INFO L410 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] [2019-11-23 20:29:45,317 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:45,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:45,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1838625458, now seen corresponding path program 1 times [2019-11-23 20:29:45,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:45,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721343814] [2019-11-23 20:29:45,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:29:45,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721343814] [2019-11-23 20:29:45,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115904198] [2019-11-23 20:29:45,412 INFO L94 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 [2019-11-23 20:29:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:45,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:29:45,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:29:45,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:45,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:29:45,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740871684] [2019-11-23 20:29:45,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:29:45,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:45,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:29:45,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:29:45,518 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 5 states. [2019-11-23 20:29:45,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:45,647 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2019-11-23 20:29:45,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:29:45,648 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-11-23 20:29:45,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:45,649 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:29:45,649 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:29:45,650 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:29:45,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:29:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-23 20:29:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:29:45,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2019-11-23 20:29:45,659 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 26 [2019-11-23 20:29:45,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:45,659 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2019-11-23 20:29:45,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:29:45,659 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2019-11-23 20:29:45,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:29:45,660 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:45,661 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 20:29:45,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:45,873 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:45,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:45,874 INFO L82 PathProgramCache]: Analyzing trace with hash 469832922, now seen corresponding path program 2 times [2019-11-23 20:29:45,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:45,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071626718] [2019-11-23 20:29:45,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:29:46,008 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071626718] [2019-11-23 20:29:46,008 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189338687] [2019-11-23 20:29:46,008 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-23 20:29:46,077 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:29:46,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:46,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:29:46,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:29:46,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:46,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:29:46,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979971451] [2019-11-23 20:29:46,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:29:46,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:46,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:29:46,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:29:46,101 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 6 states. [2019-11-23 20:29:46,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:46,231 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2019-11-23 20:29:46,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:29:46,232 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-11-23 20:29:46,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:46,234 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:29:46,234 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:29:46,235 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:29:46,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:29:46,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-23 20:29:46,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 20:29:46,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2019-11-23 20:29:46,249 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 33 [2019-11-23 20:29:46,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:46,251 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2019-11-23 20:29:46,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:29:46,252 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2019-11-23 20:29:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:29:46,254 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:46,254 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:46,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:46,459 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:46,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:46,459 INFO L82 PathProgramCache]: Analyzing trace with hash -467565902, now seen corresponding path program 3 times [2019-11-23 20:29:46,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:46,460 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121912284] [2019-11-23 20:29:46,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:29:46,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121912284] [2019-11-23 20:29:46,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342886717] [2019-11-23 20:29:46,625 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 20:29:46,725 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:29:46,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:46,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:29:46,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:29:46,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:46,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:29:46,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200213206] [2019-11-23 20:29:46,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:29:46,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:46,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:29:46,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:29:46,744 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 7 states. [2019-11-23 20:29:46,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:46,874 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2019-11-23 20:29:46,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:29:46,874 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2019-11-23 20:29:46,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:46,875 INFO L225 Difference]: With dead ends: 87 [2019-11-23 20:29:46,875 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:29:46,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:29:46,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:29:46,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-23 20:29:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:29:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2019-11-23 20:29:46,885 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 40 [2019-11-23 20:29:46,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:46,885 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2019-11-23 20:29:46,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:29:46,885 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2019-11-23 20:29:46,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:29:46,887 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:46,887 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:47,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:47,095 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:47,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:47,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1915847130, now seen corresponding path program 4 times [2019-11-23 20:29:47,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:47,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627725889] [2019-11-23 20:29:47,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-23 20:29:47,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627725889] [2019-11-23 20:29:47,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914365241] [2019-11-23 20:29:47,232 INFO L92 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 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 [2019-11-23 20:29:47,291 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:29:47,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:47,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:29:47,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-23 20:29:47,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:47,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:29:47,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177722281] [2019-11-23 20:29:47,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:29:47,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:47,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:29:47,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:29:47,329 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 8 states. [2019-11-23 20:29:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:47,461 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2019-11-23 20:29:47,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:29:47,463 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2019-11-23 20:29:47,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:47,464 INFO L225 Difference]: With dead ends: 100 [2019-11-23 20:29:47,464 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:29:47,465 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:29:47,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:29:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-23 20:29:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 20:29:47,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2019-11-23 20:29:47,478 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 47 [2019-11-23 20:29:47,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:47,481 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2019-11-23 20:29:47,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:29:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2019-11-23 20:29:47,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 20:29:47,483 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:47,484 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:47,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:47,691 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:47,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:47,691 INFO L82 PathProgramCache]: Analyzing trace with hash 2119946930, now seen corresponding path program 5 times [2019-11-23 20:29:47,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:47,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422950599] [2019-11-23 20:29:47,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-11-23 20:29:47,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422950599] [2019-11-23 20:29:47,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97656173] [2019-11-23 20:29:47,799 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2019-11-23 20:29:50,487 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:29:50,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:50,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:29:50,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-11-23 20:29:50,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:50,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:29:50,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088774335] [2019-11-23 20:29:50,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:29:50,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:50,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:29:50,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:29:50,525 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 9 states. [2019-11-23 20:29:50,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:50,668 INFO L93 Difference]: Finished difference Result 113 states and 133 transitions. [2019-11-23 20:29:50,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:29:50,668 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2019-11-23 20:29:50,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:50,669 INFO L225 Difference]: With dead ends: 113 [2019-11-23 20:29:50,669 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:29:50,670 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:29:50,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:29:50,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-11-23 20:29:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:29:50,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2019-11-23 20:29:50,678 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 54 [2019-11-23 20:29:50,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:50,678 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2019-11-23 20:29:50,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:29:50,679 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2019-11-23 20:29:50,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:29:50,680 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:50,680 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:50,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:50,887 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:50,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:50,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1499557594, now seen corresponding path program 6 times [2019-11-23 20:29:50,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:50,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501502529] [2019-11-23 20:29:50,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-23 20:29:51,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501502529] [2019-11-23 20:29:51,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661976733] [2019-11-23 20:29:51,035 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-23 20:29:52,562 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:29:52,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:52,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:29:52,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-23 20:29:52,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:52,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:29:52,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371826257] [2019-11-23 20:29:52,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:29:52,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:52,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:29:52,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:29:52,585 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 10 states. [2019-11-23 20:29:52,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:52,734 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2019-11-23 20:29:52,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:29:52,734 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2019-11-23 20:29:52,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:52,735 INFO L225 Difference]: With dead ends: 126 [2019-11-23 20:29:52,735 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 20:29:52,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:29:52,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 20:29:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-23 20:29:52,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-23 20:29:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2019-11-23 20:29:52,744 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 61 [2019-11-23 20:29:52,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:52,744 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2019-11-23 20:29:52,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:29:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2019-11-23 20:29:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-23 20:29:52,746 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:52,746 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:52,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:52,952 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:52,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:52,952 INFO L82 PathProgramCache]: Analyzing trace with hash -664919374, now seen corresponding path program 7 times [2019-11-23 20:29:52,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:52,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035753480] [2019-11-23 20:29:52,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-11-23 20:29:53,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035753480] [2019-11-23 20:29:53,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704693512] [2019-11-23 20:29:53,104 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:53,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:29:53,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-11-23 20:29:53,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:53,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:29:53,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124950069] [2019-11-23 20:29:53,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:29:53,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:53,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:29:53,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:29:53,221 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 11 states. [2019-11-23 20:29:53,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:53,407 INFO L93 Difference]: Finished difference Result 139 states and 159 transitions. [2019-11-23 20:29:53,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:29:53,408 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2019-11-23 20:29:53,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:53,409 INFO L225 Difference]: With dead ends: 139 [2019-11-23 20:29:53,410 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 20:29:53,411 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:29:53,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 20:29:53,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-11-23 20:29:53,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:29:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2019-11-23 20:29:53,419 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 68 [2019-11-23 20:29:53,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:53,419 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2019-11-23 20:29:53,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:29:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2019-11-23 20:29:53,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:29:53,420 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:53,420 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:53,624 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:53,624 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:53,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:53,625 INFO L82 PathProgramCache]: Analyzing trace with hash 184081370, now seen corresponding path program 8 times [2019-11-23 20:29:53,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:53,626 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261126081] [2019-11-23 20:29:53,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-11-23 20:29:53,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261126081] [2019-11-23 20:29:53,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132315750] [2019-11-23 20:29:53,743 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2019-11-23 20:29:53,816 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:29:53,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:53,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:29:53,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-11-23 20:29:53,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:53,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:29:53,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516078404] [2019-11-23 20:29:53,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:29:53,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:53,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:29:53,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:29:53,848 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 12 states. [2019-11-23 20:29:54,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:54,018 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2019-11-23 20:29:54,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:29:54,018 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2019-11-23 20:29:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:54,019 INFO L225 Difference]: With dead ends: 152 [2019-11-23 20:29:54,019 INFO L226 Difference]: Without dead ends: 85 [2019-11-23 20:29:54,021 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:29:54,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-23 20:29:54,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2019-11-23 20:29:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-23 20:29:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2019-11-23 20:29:54,030 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 75 [2019-11-23 20:29:54,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:54,030 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2019-11-23 20:29:54,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:29:54,030 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2019-11-23 20:29:54,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-23 20:29:54,031 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:54,032 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:54,248 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:54,249 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:54,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:54,250 INFO L82 PathProgramCache]: Analyzing trace with hash -96439630, now seen corresponding path program 9 times [2019-11-23 20:29:54,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:54,251 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219238508] [2019-11-23 20:29:54,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2019-11-23 20:29:54,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219238508] [2019-11-23 20:29:54,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131212295] [2019-11-23 20:29:54,389 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 20:30:05,923 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:30:05,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:30:05,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:30:05,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:30:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2019-11-23 20:30:05,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:30:05,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:30:05,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068217085] [2019-11-23 20:30:05,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:30:05,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:30:05,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:30:05,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:30:05,977 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 13 states. [2019-11-23 20:30:06,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:30:06,165 INFO L93 Difference]: Finished difference Result 165 states and 185 transitions. [2019-11-23 20:30:06,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:30:06,165 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2019-11-23 20:30:06,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:30:06,166 INFO L225 Difference]: With dead ends: 165 [2019-11-23 20:30:06,166 INFO L226 Difference]: Without dead ends: 92 [2019-11-23 20:30:06,167 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:30:06,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-23 20:30:06,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-11-23 20:30:06,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 20:30:06,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2019-11-23 20:30:06,175 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 82 [2019-11-23 20:30:06,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:30:06,175 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2019-11-23 20:30:06,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:30:06,176 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2019-11-23 20:30:06,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-23 20:30:06,177 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:30:06,177 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:30:06,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:30:06,396 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:30:06,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:30:06,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1268791078, now seen corresponding path program 10 times [2019-11-23 20:30:06,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:30:06,398 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419851024] [2019-11-23 20:30:06,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:30:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:30:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:30:06,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419851024] [2019-11-23 20:30:06,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026686747] [2019-11-23 20:30:06,548 INFO L92 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 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 [2019-11-23 20:30:06,658 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:30:06,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:30:06,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:30:06,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:30:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:30:06,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:30:06,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:30:06,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896262789] [2019-11-23 20:30:06,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:30:06,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:30:06,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:30:06,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:30:06,704 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 14 states. [2019-11-23 20:30:06,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:30:06,949 INFO L93 Difference]: Finished difference Result 178 states and 198 transitions. [2019-11-23 20:30:06,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:30:06,950 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2019-11-23 20:30:06,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:30:06,951 INFO L225 Difference]: With dead ends: 178 [2019-11-23 20:30:06,951 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 20:30:06,951 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:30:06,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 20:30:06,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-11-23 20:30:06,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-23 20:30:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2019-11-23 20:30:06,970 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 89 [2019-11-23 20:30:06,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:30:06,970 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2019-11-23 20:30:06,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:30:06,971 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2019-11-23 20:30:06,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-23 20:30:06,976 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:30:06,976 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:30:07,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:30:07,181 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:30:07,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:30:07,181 INFO L82 PathProgramCache]: Analyzing trace with hash -669334862, now seen corresponding path program 11 times [2019-11-23 20:30:07,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:30:07,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930662584] [2019-11-23 20:30:07,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:30:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:30:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2019-11-23 20:30:07,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930662584] [2019-11-23 20:30:07,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055677686] [2019-11-23 20:30:07,355 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_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