/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/loops/n.c24.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:14:47,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:14:47,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:14:47,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:14:47,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:14:47,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:14:47,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:14:47,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:14:47,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:14:47,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:14:47,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:14:47,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:14:47,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:14:47,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:14:47,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:14:47,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:14:47,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:14:47,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:14:47,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:14:47,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:14:47,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:14:47,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:14:47,727 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:14:47,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:14:47,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:14:47,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 22:14:47,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 22:14:47,734 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 22:14:47,735 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 22:14:47,736 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 22:14:47,736 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 22:14:47,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 22:14:47,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 22:14:47,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:14:47,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:14:47,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:14:47,740 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 22:14:47,760 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:14:47,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:14:47,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:14:47,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:14:47,763 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:14:47,763 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:14:47,763 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:14:47,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:14:47,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:14:47,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:14:47,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:14:47,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:14:47,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:14:47,766 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:14:47,766 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:14:47,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:14:47,766 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:14:47,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:14:47,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:14:47,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:14:47,768 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:14:47,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:14:47,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:14:47,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:14:47,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:14:47,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:14:47,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:14:47,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:14:47,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:14:47,769 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:14:48,057 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:14:48,073 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:14:48,077 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:14:48,079 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:14:48,079 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:14:48,080 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c24.i [2019-11-23 22:14:48,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c05b6bece/79ef2fa309a040d694449e04bcec3963/FLAG387ba4cf3 [2019-11-23 22:14:48,658 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:14:48,658 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i [2019-11-23 22:14:48,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c05b6bece/79ef2fa309a040d694449e04bcec3963/FLAG387ba4cf3 [2019-11-23 22:14:48,953 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c05b6bece/79ef2fa309a040d694449e04bcec3963 [2019-11-23 22:14:48,966 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:14:48,967 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:14:48,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:14:48,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:14:48,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:14:48,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:14:48" (1/1) ... [2019-11-23 22:14:48,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fd32bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:48, skipping insertion in model container [2019-11-23 22:14:48,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:14:48" (1/1) ... [2019-11-23 22:14:48,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:14:49,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:14:49,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:14:49,256 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:14:49,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:14:49,408 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:14:49,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:49 WrapperNode [2019-11-23 22:14:49,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:14:49,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:14:49,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:14:49,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:14:49,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:49" (1/1) ... [2019-11-23 22:14:49,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:49" (1/1) ... [2019-11-23 22:14:49,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:14:49,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:14:49,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:14:49,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:14:49,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:49" (1/1) ... [2019-11-23 22:14:49,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:49" (1/1) ... [2019-11-23 22:14:49,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:49" (1/1) ... [2019-11-23 22:14:49,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:49" (1/1) ... [2019-11-23 22:14:49,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:49" (1/1) ... [2019-11-23 22:14:49,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:49" (1/1) ... [2019-11-23 22:14:49,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:49" (1/1) ... [2019-11-23 22:14:49,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:14:49,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:14:49,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:14:49,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:14:49,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:49" (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 22:14:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-11-23 22:14:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:14:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:14:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:14:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:14:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2019-11-23 22:14:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:14:49,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:14:50,013 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:14:50,013 INFO L284 CfgBuilder]: Removed 16 assume(true) statements. [2019-11-23 22:14:50,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:14:50 BoogieIcfgContainer [2019-11-23 22:14:50,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:14:50,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:14:50,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:14:50,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:14:50,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:14:48" (1/3) ... [2019-11-23 22:14:50,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b3dde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:14:50, skipping insertion in model container [2019-11-23 22:14:50,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:49" (2/3) ... [2019-11-23 22:14:50,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b3dde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:14:50, skipping insertion in model container [2019-11-23 22:14:50,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:14:50" (3/3) ... [2019-11-23 22:14:50,023 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c24.i [2019-11-23 22:14:50,031 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:14:50,037 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:14:50,048 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:14:50,071 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:14:50,071 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:14:50,071 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:14:50,071 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:14:50,071 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:14:50,071 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:14:50,072 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:14:50,072 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:14:50,084 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-11-23 22:14:50,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:14:50,091 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:50,091 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:50,092 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:50,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:50,097 INFO L82 PathProgramCache]: Analyzing trace with hash 214843119, now seen corresponding path program 1 times [2019-11-23 22:14:50,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:50,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679177675] [2019-11-23 22:14:50,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:50,228 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 22:14:50,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679177675] [2019-11-23 22:14:50,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:14:50,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:14:50,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286636031] [2019-11-23 22:14:50,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:14:50,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:50,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:14:50,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:14:50,255 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2019-11-23 22:14:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:50,279 INFO L93 Difference]: Finished difference Result 64 states and 98 transitions. [2019-11-23 22:14:50,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:14:50,281 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-23 22:14:50,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:50,295 INFO L225 Difference]: With dead ends: 64 [2019-11-23 22:14:50,296 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:14:50,300 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:14:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:14:50,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-23 22:14:50,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:14:50,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2019-11-23 22:14:50,345 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 8 [2019-11-23 22:14:50,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:50,346 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2019-11-23 22:14:50,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:14:50,346 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2019-11-23 22:14:50,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:14:50,347 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:50,347 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:50,348 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:50,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:50,348 INFO L82 PathProgramCache]: Analyzing trace with hash 212132138, now seen corresponding path program 1 times [2019-11-23 22:14:50,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:50,349 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882741127] [2019-11-23 22:14:50,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:50,406 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 22:14:50,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882741127] [2019-11-23 22:14:50,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:14:50,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:14:50,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221896776] [2019-11-23 22:14:50,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:14:50,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:50,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:14:50,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:14:50,413 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand 3 states. [2019-11-23 22:14:50,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:50,512 INFO L93 Difference]: Finished difference Result 79 states and 109 transitions. [2019-11-23 22:14:50,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:14:50,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 22:14:50,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:50,515 INFO L225 Difference]: With dead ends: 79 [2019-11-23 22:14:50,515 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 22:14:50,517 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 22:14:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 22:14:50,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2019-11-23 22:14:50,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 22:14:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2019-11-23 22:14:50,534 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 8 [2019-11-23 22:14:50,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:50,534 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2019-11-23 22:14:50,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:14:50,535 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2019-11-23 22:14:50,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:14:50,538 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:50,538 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:50,539 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:50,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:50,540 INFO L82 PathProgramCache]: Analyzing trace with hash 979779318, now seen corresponding path program 1 times [2019-11-23 22:14:50,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:50,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795822700] [2019-11-23 22:14:50,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:14:50,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795822700] [2019-11-23 22:14:50,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937763691] [2019-11-23 22:14:50,642 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 22:14:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:50,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:14:50,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:14:50,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:50,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:14:50,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667197612] [2019-11-23 22:14:50,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:14:50,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:50,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:14:50,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:14:50,762 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 5 states. [2019-11-23 22:14:50,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:50,863 INFO L93 Difference]: Finished difference Result 103 states and 142 transitions. [2019-11-23 22:14:50,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:14:50,863 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-23 22:14:50,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:50,865 INFO L225 Difference]: With dead ends: 103 [2019-11-23 22:14:50,865 INFO L226 Difference]: Without dead ends: 76 [2019-11-23 22:14:50,866 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 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 22:14:50,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-23 22:14:50,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2019-11-23 22:14:50,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 22:14:50,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2019-11-23 22:14:50,877 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 15 [2019-11-23 22:14:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:50,877 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2019-11-23 22:14:50,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:14:50,877 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2019-11-23 22:14:50,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:14:50,878 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:50,879 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:51,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:51,084 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:51,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:51,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1772486034, now seen corresponding path program 2 times [2019-11-23 22:14:51,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:51,085 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354167037] [2019-11-23 22:14:51,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:14:51,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354167037] [2019-11-23 22:14:51,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969625413] [2019-11-23 22:14:51,180 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 22:14:51,262 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:14:51,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:51,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:14:51,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:14:51,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:14:51,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2019-11-23 22:14:51,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637191638] [2019-11-23 22:14:51,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:14:51,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:51,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:14:51,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:14:51,296 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand 4 states. [2019-11-23 22:14:51,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:51,337 INFO L93 Difference]: Finished difference Result 99 states and 136 transitions. [2019-11-23 22:14:51,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:14:51,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-11-23 22:14:51,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:51,339 INFO L225 Difference]: With dead ends: 99 [2019-11-23 22:14:51,339 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 22:14:51,340 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:14:51,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 22:14:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 56. [2019-11-23 22:14:51,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 22:14:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2019-11-23 22:14:51,349 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 22 [2019-11-23 22:14:51,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:51,350 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2019-11-23 22:14:51,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:14:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2019-11-23 22:14:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:14:51,351 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:51,351 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] [2019-11-23 22:14:51,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:51,556 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:51,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:51,556 INFO L82 PathProgramCache]: Analyzing trace with hash -60131068, now seen corresponding path program 1 times [2019-11-23 22:14:51,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:51,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641858735] [2019-11-23 22:14:51,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:14:51,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641858735] [2019-11-23 22:14:51,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357527671] [2019-11-23 22:14:51,627 INFO L94 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 [2019-11-23 22:14:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:51,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:14:51,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:14:51,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:51,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 22:14:51,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48569722] [2019-11-23 22:14:51,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:14:51,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:51,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:14:51,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:14:51,723 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand 6 states. [2019-11-23 22:14:51,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:51,823 INFO L93 Difference]: Finished difference Result 156 states and 217 transitions. [2019-11-23 22:14:51,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:14:51,824 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-11-23 22:14:51,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:51,825 INFO L225 Difference]: With dead ends: 156 [2019-11-23 22:14:51,826 INFO L226 Difference]: Without dead ends: 107 [2019-11-23 22:14:51,826 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 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 22:14:51,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-23 22:14:51,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2019-11-23 22:14:51,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-23 22:14:51,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 108 transitions. [2019-11-23 22:14:51,838 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 108 transitions. Word has length 27 [2019-11-23 22:14:51,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:51,838 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 108 transitions. [2019-11-23 22:14:51,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:14:51,839 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 108 transitions. [2019-11-23 22:14:51,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 22:14:51,840 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:51,840 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] [2019-11-23 22:14:52,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:52,050 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:52,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:52,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1460150848, now seen corresponding path program 2 times [2019-11-23 22:14:52,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:52,052 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767011290] [2019-11-23 22:14:52,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 22:14:52,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767011290] [2019-11-23 22:14:52,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794112365] [2019-11-23 22:14:52,181 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 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 22:14:52,245 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:14:52,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:52,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:14:52,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 22:14:52,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:52,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 22:14:52,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776458030] [2019-11-23 22:14:52,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:14:52,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:52,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:14:52,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:14:52,275 INFO L87 Difference]: Start difference. First operand 79 states and 108 transitions. Second operand 7 states. [2019-11-23 22:14:52,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:52,403 INFO L93 Difference]: Finished difference Result 200 states and 279 transitions. [2019-11-23 22:14:52,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:14:52,403 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-11-23 22:14:52,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:52,405 INFO L225 Difference]: With dead ends: 200 [2019-11-23 22:14:52,406 INFO L226 Difference]: Without dead ends: 130 [2019-11-23 22:14:52,407 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 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 22:14:52,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-11-23 22:14:52,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 102. [2019-11-23 22:14:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-23 22:14:52,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2019-11-23 22:14:52,436 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 34 [2019-11-23 22:14:52,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:52,436 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2019-11-23 22:14:52,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:14:52,436 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2019-11-23 22:14:52,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:14:52,441 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:52,441 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] [2019-11-23 22:14:52,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:52,646 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:52,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:52,646 INFO L82 PathProgramCache]: Analyzing trace with hash -569704896, now seen corresponding path program 3 times [2019-11-23 22:14:52,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:52,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483864480] [2019-11-23 22:14:52,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 22:14:52,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483864480] [2019-11-23 22:14:52,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757171933] [2019-11-23 22:14:52,778 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 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 22:14:52,844 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:14:52,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:52,846 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:14:52,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:52,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 22:14:52,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:52,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2019-11-23 22:14:52,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421981948] [2019-11-23 22:14:52,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:14:52,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:52,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:14:52,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:14:52,959 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand 13 states. [2019-11-23 22:14:53,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:53,712 INFO L93 Difference]: Finished difference Result 479 states and 683 transitions. [2019-11-23 22:14:53,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:14:53,713 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2019-11-23 22:14:53,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:53,715 INFO L225 Difference]: With dead ends: 479 [2019-11-23 22:14:53,716 INFO L226 Difference]: Without dead ends: 386 [2019-11-23 22:14:53,717 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:14:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2019-11-23 22:14:53,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 142. [2019-11-23 22:14:53,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-23 22:14:53,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 198 transitions. [2019-11-23 22:14:53,735 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 198 transitions. Word has length 41 [2019-11-23 22:14:53,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:53,735 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 198 transitions. [2019-11-23 22:14:53,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:14:53,735 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 198 transitions. [2019-11-23 22:14:53,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 22:14:53,737 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:53,738 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:53,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:53,949 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:53,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:53,949 INFO L82 PathProgramCache]: Analyzing trace with hash 699814446, now seen corresponding path program 4 times [2019-11-23 22:14:53,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:53,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880276959] [2019-11-23 22:14:53,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 22:14:54,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880276959] [2019-11-23 22:14:54,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132379816] [2019-11-23 22:14:54,054 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 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 22:14:54,116 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:14:54,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:54,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:14:54,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 22:14:54,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:54,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 22:14:54,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418965325] [2019-11-23 22:14:54,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:14:54,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:54,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:14:54,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:14:54,147 INFO L87 Difference]: Start difference. First operand 142 states and 198 transitions. Second operand 9 states. [2019-11-23 22:14:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:54,284 INFO L93 Difference]: Finished difference Result 356 states and 507 transitions. [2019-11-23 22:14:54,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:14:54,284 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2019-11-23 22:14:54,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:54,286 INFO L225 Difference]: With dead ends: 356 [2019-11-23 22:14:54,286 INFO L226 Difference]: Without dead ends: 227 [2019-11-23 22:14:54,287 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 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 22:14:54,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-11-23 22:14:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 165. [2019-11-23 22:14:54,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-11-23 22:14:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 230 transitions. [2019-11-23 22:14:54,314 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 230 transitions. Word has length 53 [2019-11-23 22:14:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:54,315 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 230 transitions. [2019-11-23 22:14:54,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:14:54,315 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 230 transitions. [2019-11-23 22:14:54,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 22:14:54,319 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:54,319 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:54,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:54,524 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:54,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:54,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1002785610, now seen corresponding path program 5 times [2019-11-23 22:14:54,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:54,525 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343198290] [2019-11-23 22:14:54,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-23 22:14:54,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343198290] [2019-11-23 22:14:54,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599731792] [2019-11-23 22:14:54,651 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 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 22:14:54,736 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 22:14:54,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:54,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:14:54,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-23 22:14:54,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:54,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 22:14:54,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131903585] [2019-11-23 22:14:54,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:14:54,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:54,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:14:54,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:14:54,764 INFO L87 Difference]: Start difference. First operand 165 states and 230 transitions. Second operand 10 states. [2019-11-23 22:14:54,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:54,932 INFO L93 Difference]: Finished difference Result 400 states and 569 transitions. [2019-11-23 22:14:54,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:14:54,933 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2019-11-23 22:14:54,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:54,935 INFO L225 Difference]: With dead ends: 400 [2019-11-23 22:14:54,935 INFO L226 Difference]: Without dead ends: 250 [2019-11-23 22:14:54,936 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 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 22:14:54,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-11-23 22:14:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 188. [2019-11-23 22:14:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 22:14:54,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 262 transitions. [2019-11-23 22:14:54,954 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 262 transitions. Word has length 60 [2019-11-23 22:14:54,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:54,954 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 262 transitions. [2019-11-23 22:14:54,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:14:54,955 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 262 transitions. [2019-11-23 22:14:54,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 22:14:54,957 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:54,958 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:55,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:55,161 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:55,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:55,162 INFO L82 PathProgramCache]: Analyzing trace with hash 2061652970, now seen corresponding path program 6 times [2019-11-23 22:14:55,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:55,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048002198] [2019-11-23 22:14:55,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2019-11-23 22:14:55,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048002198] [2019-11-23 22:14:55,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339753656] [2019-11-23 22:14:55,259 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 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 22:14:55,346 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 22:14:55,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:55,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:14:55,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:55,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 31 proven. 7 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2019-11-23 22:14:55,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:55,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-11-23 22:14:55,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195188619] [2019-11-23 22:14:55,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:14:55,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:55,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:14:55,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:14:55,454 INFO L87 Difference]: Start difference. First operand 188 states and 262 transitions. Second operand 15 states. [2019-11-23 22:14:56,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:56,666 INFO L93 Difference]: Finished difference Result 929 states and 1331 transitions. [2019-11-23 22:14:56,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 22:14:56,667 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2019-11-23 22:14:56,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:56,671 INFO L225 Difference]: With dead ends: 929 [2019-11-23 22:14:56,672 INFO L226 Difference]: Without dead ends: 756 [2019-11-23 22:14:56,674 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=725, Invalid=1725, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:14:56,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2019-11-23 22:14:56,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 228. [2019-11-23 22:14:56,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-11-23 22:14:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 320 transitions. [2019-11-23 22:14:56,694 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 320 transitions. Word has length 67 [2019-11-23 22:14:56,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:56,694 INFO L462 AbstractCegarLoop]: Abstraction has 228 states and 320 transitions. [2019-11-23 22:14:56,695 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:14:56,695 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 320 transitions. [2019-11-23 22:14:56,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 22:14:56,696 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:56,696 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:56,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:56,909 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:56,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:56,909 INFO L82 PathProgramCache]: Analyzing trace with hash 405362168, now seen corresponding path program 7 times [2019-11-23 22:14:56,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:56,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454575667] [2019-11-23 22:14:56,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-23 22:14:57,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454575667] [2019-11-23 22:14:57,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576648838] [2019-11-23 22:14:57,057 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 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 22:14:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:57,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:14:57,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-23 22:14:57,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:57,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:14:57,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854153595] [2019-11-23 22:14:57,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:14:57,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:57,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:14:57,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:14:57,164 INFO L87 Difference]: Start difference. First operand 228 states and 320 transitions. Second operand 12 states. [2019-11-23 22:14:57,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:57,324 INFO L93 Difference]: Finished difference Result 556 states and 797 transitions. [2019-11-23 22:14:57,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:14:57,324 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2019-11-23 22:14:57,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:57,327 INFO L225 Difference]: With dead ends: 556 [2019-11-23 22:14:57,327 INFO L226 Difference]: Without dead ends: 347 [2019-11-23 22:14:57,328 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 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 22:14:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2019-11-23 22:14:57,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 251. [2019-11-23 22:14:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2019-11-23 22:14:57,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 352 transitions. [2019-11-23 22:14:57,345 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 352 transitions. Word has length 79 [2019-11-23 22:14:57,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:57,345 INFO L462 AbstractCegarLoop]: Abstraction has 251 states and 352 transitions. [2019-11-23 22:14:57,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:14:57,345 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 352 transitions. [2019-11-23 22:14:57,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-23 22:14:57,347 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:57,347 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:57,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:57,553 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:57,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:57,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1160449228, now seen corresponding path program 8 times [2019-11-23 22:14:57,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:57,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88574036] [2019-11-23 22:14:57,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-11-23 22:14:57,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88574036] [2019-11-23 22:14:57,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027661393] [2019-11-23 22:14:57,712 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 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 22:14:57,791 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:14:57,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:57,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:14:57,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-11-23 22:14:57,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:57,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 22:14:57,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220813979] [2019-11-23 22:14:57,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:14:57,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:57,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:14:57,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:14:57,816 INFO L87 Difference]: Start difference. First operand 251 states and 352 transitions. Second operand 13 states. [2019-11-23 22:14:58,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:58,027 INFO L93 Difference]: Finished difference Result 600 states and 859 transitions. [2019-11-23 22:14:58,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:14:58,028 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 86 [2019-11-23 22:14:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:58,031 INFO L225 Difference]: With dead ends: 600 [2019-11-23 22:14:58,032 INFO L226 Difference]: Without dead ends: 370 [2019-11-23 22:14:58,033 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 86 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 22:14:58,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2019-11-23 22:14:58,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 274. [2019-11-23 22:14:58,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2019-11-23 22:14:58,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 384 transitions. [2019-11-23 22:14:58,055 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 384 transitions. Word has length 86 [2019-11-23 22:14:58,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:58,056 INFO L462 AbstractCegarLoop]: Abstraction has 274 states and 384 transitions. [2019-11-23 22:14:58,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:14:58,056 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 384 transitions. [2019-11-23 22:14:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-23 22:14:58,057 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:58,057 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:58,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:58,262 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:58,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:58,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1195602996, now seen corresponding path program 9 times [2019-11-23 22:14:58,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:58,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24285638] [2019-11-23 22:14:58,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2019-11-23 22:14:58,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24285638] [2019-11-23 22:14:58,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784838894] [2019-11-23 22:14:58,456 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 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 [2019-11-23 22:14:58,543 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 22:14:58,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:58,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:14:58,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:58,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 9 proven. 64 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 22:14:58,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:58,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2019-11-23 22:14:58,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398256622] [2019-11-23 22:14:58,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:14:58,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:58,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:14:58,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:14:58,690 INFO L87 Difference]: Start difference. First operand 274 states and 384 transitions. Second operand 21 states. [2019-11-23 22:15:01,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:01,645 INFO L93 Difference]: Finished difference Result 1499 states and 2153 transitions. [2019-11-23 22:15:01,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-11-23 22:15:01,646 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2019-11-23 22:15:01,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:01,652 INFO L225 Difference]: With dead ends: 1499 [2019-11-23 22:15:01,652 INFO L226 Difference]: Without dead ends: 1246 [2019-11-23 22:15:01,656 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2650 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2368, Invalid=6004, Unknown=0, NotChecked=0, Total=8372 [2019-11-23 22:15:01,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2019-11-23 22:15:01,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 314. [2019-11-23 22:15:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2019-11-23 22:15:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 442 transitions. [2019-11-23 22:15:01,686 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 442 transitions. Word has length 93 [2019-11-23 22:15:01,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:01,687 INFO L462 AbstractCegarLoop]: Abstraction has 314 states and 442 transitions. [2019-11-23 22:15:01,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:15:01,687 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 442 transitions. [2019-11-23 22:15:01,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-23 22:15:01,688 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:01,688 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:01,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:01,893 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:01,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:01,893 INFO L82 PathProgramCache]: Analyzing trace with hash -976504798, now seen corresponding path program 10 times [2019-11-23 22:15:01,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:01,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890829618] [2019-11-23 22:15:01,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2019-11-23 22:15:02,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890829618] [2019-11-23 22:15:02,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380285877] [2019-11-23 22:15:02,037 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 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 [2019-11-23 22:15:02,120 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:15:02,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:02,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:15:02,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2019-11-23 22:15:02,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:02,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 22:15:02,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022088492] [2019-11-23 22:15:02,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:15:02,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:02,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:15:02,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:15:02,174 INFO L87 Difference]: Start difference. First operand 314 states and 442 transitions. Second operand 15 states. [2019-11-23 22:15:02,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:02,366 INFO L93 Difference]: Finished difference Result 756 states and 1087 transitions. [2019-11-23 22:15:02,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:15:02,367 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 105 [2019-11-23 22:15:02,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:02,369 INFO L225 Difference]: With dead ends: 756 [2019-11-23 22:15:02,369 INFO L226 Difference]: Without dead ends: 467 [2019-11-23 22:15:02,370 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:15:02,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2019-11-23 22:15:02,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 337. [2019-11-23 22:15:02,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2019-11-23 22:15:02,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 474 transitions. [2019-11-23 22:15:02,396 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 474 transitions. Word has length 105 [2019-11-23 22:15:02,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:02,396 INFO L462 AbstractCegarLoop]: Abstraction has 337 states and 474 transitions. [2019-11-23 22:15:02,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:15:02,396 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 474 transitions. [2019-11-23 22:15:02,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-23 22:15:02,398 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:02,398 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:02,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:02,607 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:02,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:02,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1388274110, now seen corresponding path program 11 times [2019-11-23 22:15:02,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:02,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279731727] [2019-11-23 22:15:02,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2019-11-23 22:15:02,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279731727] [2019-11-23 22:15:02,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602718119] [2019-11-23 22:15:02,788 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 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 [2019-11-23 22:15:03,002 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-23 22:15:03,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:03,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:15:03,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2019-11-23 22:15:03,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:03,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 22:15:03,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200370213] [2019-11-23 22:15:03,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:15:03,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:03,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:15:03,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:15:03,040 INFO L87 Difference]: Start difference. First operand 337 states and 474 transitions. Second operand 16 states. [2019-11-23 22:15:03,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:03,248 INFO L93 Difference]: Finished difference Result 800 states and 1149 transitions. [2019-11-23 22:15:03,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:15:03,248 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 112 [2019-11-23 22:15:03,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:03,251 INFO L225 Difference]: With dead ends: 800 [2019-11-23 22:15:03,251 INFO L226 Difference]: Without dead ends: 490 [2019-11-23 22:15:03,253 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:15:03,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2019-11-23 22:15:03,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 360. [2019-11-23 22:15:03,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2019-11-23 22:15:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 506 transitions. [2019-11-23 22:15:03,281 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 506 transitions. Word has length 112 [2019-11-23 22:15:03,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:03,282 INFO L462 AbstractCegarLoop]: Abstraction has 360 states and 506 transitions. [2019-11-23 22:15:03,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:15:03,282 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 506 transitions. [2019-11-23 22:15:03,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-23 22:15:03,284 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:03,284 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:03,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:03,489 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:03,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1913557726, now seen corresponding path program 12 times [2019-11-23 22:15:03,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:03,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211753138] [2019-11-23 22:15:03,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2019-11-23 22:15:03,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211753138] [2019-11-23 22:15:03,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610269206] [2019-11-23 22:15:03,651 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 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 [2019-11-23 22:15:03,811 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 22:15:03,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:03,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:15:03,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:03,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:15:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 12 proven. 107 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2019-11-23 22:15:03,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:03,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 25 [2019-11-23 22:15:03,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669876812] [2019-11-23 22:15:03,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:15:03,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:03,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:15:03,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:15:03,999 INFO L87 Difference]: Start difference. First operand 360 states and 506 transitions. Second operand 25 states. [2019-11-23 22:15:08,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:08,585 INFO L93 Difference]: Finished difference Result 2189 states and 3149 transitions. [2019-11-23 22:15:08,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2019-11-23 22:15:08,585 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 119 [2019-11-23 22:15:08,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:08,593 INFO L225 Difference]: With dead ends: 2189 [2019-11-23 22:15:08,594 INFO L226 Difference]: Without dead ends: 1856 [2019-11-23 22:15:08,599 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5681 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4639, Invalid=11873, Unknown=0, NotChecked=0, Total=16512 [2019-11-23 22:15:08,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2019-11-23 22:15:08,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 400. [2019-11-23 22:15:08,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2019-11-23 22:15:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 564 transitions. [2019-11-23 22:15:08,643 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 564 transitions. Word has length 119 [2019-11-23 22:15:08,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:08,644 INFO L462 AbstractCegarLoop]: Abstraction has 400 states and 564 transitions. [2019-11-23 22:15:08,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:15:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 564 transitions. [2019-11-23 22:15:08,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-23 22:15:08,646 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:08,646 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:08,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:08,850 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:08,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:08,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1990173460, now seen corresponding path program 13 times [2019-11-23 22:15:08,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:08,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094108343] [2019-11-23 22:15:08,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2019-11-23 22:15:09,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094108343] [2019-11-23 22:15:09,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175784146] [2019-11-23 22:15:09,051 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 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 [2019-11-23 22:15:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:09,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:15:09,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2019-11-23 22:15:09,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:09,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 22:15:09,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864188068] [2019-11-23 22:15:09,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:15:09,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:09,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:15:09,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:15:09,217 INFO L87 Difference]: Start difference. First operand 400 states and 564 transitions. Second operand 18 states. [2019-11-23 22:15:09,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:09,512 INFO L93 Difference]: Finished difference Result 956 states and 1377 transitions. [2019-11-23 22:15:09,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:15:09,513 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 131 [2019-11-23 22:15:09,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:09,516 INFO L225 Difference]: With dead ends: 956 [2019-11-23 22:15:09,516 INFO L226 Difference]: Without dead ends: 587 [2019-11-23 22:15:09,517 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:15:09,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2019-11-23 22:15:09,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 423. [2019-11-23 22:15:09,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2019-11-23 22:15:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 596 transitions. [2019-11-23 22:15:09,560 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 596 transitions. Word has length 131 [2019-11-23 22:15:09,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:09,560 INFO L462 AbstractCegarLoop]: Abstraction has 423 states and 596 transitions. [2019-11-23 22:15:09,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:15:09,560 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 596 transitions. [2019-11-23 22:15:09,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-23 22:15:09,562 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:09,562 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:09,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:09,766 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:09,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:09,767 INFO L82 PathProgramCache]: Analyzing trace with hash 948800856, now seen corresponding path program 14 times [2019-11-23 22:15:09,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:09,768 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961915342] [2019-11-23 22:15:09,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 665 trivial. 0 not checked. [2019-11-23 22:15:10,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961915342] [2019-11-23 22:15:10,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945282738] [2019-11-23 22:15:10,001 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 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 [2019-11-23 22:15:10,095 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:15:10,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:10,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:15:10,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 665 trivial. 0 not checked. [2019-11-23 22:15:10,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:10,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 22:15:10,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131736770] [2019-11-23 22:15:10,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:15:10,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:10,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:15:10,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:15:10,122 INFO L87 Difference]: Start difference. First operand 423 states and 596 transitions. Second operand 19 states. [2019-11-23 22:15:10,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:10,384 INFO L93 Difference]: Finished difference Result 1000 states and 1439 transitions. [2019-11-23 22:15:10,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:15:10,385 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 138 [2019-11-23 22:15:10,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:10,387 INFO L225 Difference]: With dead ends: 1000 [2019-11-23 22:15:10,387 INFO L226 Difference]: Without dead ends: 610 [2019-11-23 22:15:10,388 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:15:10,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2019-11-23 22:15:10,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 446. [2019-11-23 22:15:10,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 446 states. [2019-11-23 22:15:10,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 628 transitions. [2019-11-23 22:15:10,433 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 628 transitions. Word has length 138 [2019-11-23 22:15:10,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:10,433 INFO L462 AbstractCegarLoop]: Abstraction has 446 states and 628 transitions. [2019-11-23 22:15:10,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:15:10,433 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 628 transitions. [2019-11-23 22:15:10,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 22:15:10,435 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:10,435 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:10,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:10,648 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:10,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:10,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1960743976, now seen corresponding path program 15 times [2019-11-23 22:15:10,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:10,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740073150] [2019-11-23 22:15:10,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 746 trivial. 0 not checked. [2019-11-23 22:15:10,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740073150] [2019-11-23 22:15:10,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367130100] [2019-11-23 22:15:10,933 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 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 [2019-11-23 22:15:11,094 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 22:15:11,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:11,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:15:11,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:11,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:15:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 15 proven. 161 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2019-11-23 22:15:11,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:11,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2019-11-23 22:15:11,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860227316] [2019-11-23 22:15:11,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 22:15:11,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:11,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 22:15:11,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:15:11,307 INFO L87 Difference]: Start difference. First operand 446 states and 628 transitions. Second operand 29 states. [2019-11-23 22:15:18,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:18,487 INFO L93 Difference]: Finished difference Result 2999 states and 4319 transitions. [2019-11-23 22:15:18,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2019-11-23 22:15:18,488 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 145 [2019-11-23 22:15:18,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:18,497 INFO L225 Difference]: With dead ends: 2999 [2019-11-23 22:15:18,497 INFO L226 Difference]: Without dead ends: 2586 [2019-11-23 22:15:18,506 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10723 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=8204, Invalid=21208, Unknown=0, NotChecked=0, Total=29412 [2019-11-23 22:15:18,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2019-11-23 22:15:18,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 486. [2019-11-23 22:15:18,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2019-11-23 22:15:18,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 686 transitions. [2019-11-23 22:15:18,570 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 686 transitions. Word has length 145 [2019-11-23 22:15:18,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:18,571 INFO L462 AbstractCegarLoop]: Abstraction has 486 states and 686 transitions. [2019-11-23 22:15:18,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 22:15:18,571 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 686 transitions. [2019-11-23 22:15:18,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-23 22:15:18,573 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:18,573 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:18,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:18,777 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:18,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:18,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1285146646, now seen corresponding path program 16 times [2019-11-23 22:15:18,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:18,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009431154] [2019-11-23 22:15:18,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2019-11-23 22:15:19,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009431154] [2019-11-23 22:15:19,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575503462] [2019-11-23 22:15:19,019 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 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 [2019-11-23 22:15:19,125 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:15:19,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:19,127 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:15:19,129 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 793 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2019-11-23 22:15:19,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:19,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 22:15:19,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045708489] [2019-11-23 22:15:19,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:15:19,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:19,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:15:19,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:15:19,160 INFO L87 Difference]: Start difference. First operand 486 states and 686 transitions. Second operand 21 states. [2019-11-23 22:15:19,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:19,532 INFO L93 Difference]: Finished difference Result 1156 states and 1667 transitions. [2019-11-23 22:15:19,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:15:19,532 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 157 [2019-11-23 22:15:19,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:19,535 INFO L225 Difference]: With dead ends: 1156 [2019-11-23 22:15:19,535 INFO L226 Difference]: Without dead ends: 707 [2019-11-23 22:15:19,536 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:15:19,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2019-11-23 22:15:19,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 509. [2019-11-23 22:15:19,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2019-11-23 22:15:19,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 718 transitions. [2019-11-23 22:15:19,596 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 718 transitions. Word has length 157 [2019-11-23 22:15:19,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:19,596 INFO L462 AbstractCegarLoop]: Abstraction has 509 states and 718 transitions. [2019-11-23 22:15:19,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:15:19,597 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 718 transitions. [2019-11-23 22:15:19,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-23 22:15:19,598 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:19,599 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:19,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:19,812 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:19,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:19,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2047057358, now seen corresponding path program 17 times [2019-11-23 22:15:19,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:19,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639293701] [2019-11-23 22:15:19,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2019-11-23 22:15:20,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639293701] [2019-11-23 22:15:20,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118121158] [2019-11-23 22:15:20,116 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 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 [2019-11-23 22:15:20,450 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-11-23 22:15:20,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:20,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 22:15:20,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2019-11-23 22:15:20,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:20,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 22:15:20,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295231670] [2019-11-23 22:15:20,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:15:20,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:20,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:15:20,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:15:20,478 INFO L87 Difference]: Start difference. First operand 509 states and 718 transitions. Second operand 22 states. [2019-11-23 22:15:20,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:20,782 INFO L93 Difference]: Finished difference Result 1200 states and 1729 transitions. [2019-11-23 22:15:20,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:15:20,783 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 164 [2019-11-23 22:15:20,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:20,787 INFO L225 Difference]: With dead ends: 1200 [2019-11-23 22:15:20,787 INFO L226 Difference]: Without dead ends: 730 [2019-11-23 22:15:20,788 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:15:20,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2019-11-23 22:15:20,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 532. [2019-11-23 22:15:20,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2019-11-23 22:15:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 750 transitions. [2019-11-23 22:15:20,854 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 750 transitions. Word has length 164 [2019-11-23 22:15:20,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:20,855 INFO L462 AbstractCegarLoop]: Abstraction has 532 states and 750 transitions. [2019-11-23 22:15:20,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:15:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 750 transitions. [2019-11-23 22:15:20,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-23 22:15:20,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:20,857 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:21,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:21,062 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:21,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:21,062 INFO L82 PathProgramCache]: Analyzing trace with hash -834798638, now seen corresponding path program 18 times [2019-11-23 22:15:21,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:21,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591677924] [2019-11-23 22:15:21,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1063 trivial. 0 not checked. [2019-11-23 22:15:21,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591677924] [2019-11-23 22:15:21,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162851176] [2019-11-23 22:15:21,563 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 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 [2019-11-23 22:15:22,123 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 22:15:22,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:22,127 INFO L255 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:15:22,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:22,434 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:15:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 18 proven. 226 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2019-11-23 22:15:22,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:22,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 33 [2019-11-23 22:15:22,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061681802] [2019-11-23 22:15:22,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 22:15:22,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:22,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 22:15:22,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:15:22,533 INFO L87 Difference]: Start difference. First operand 532 states and 750 transitions. Second operand 33 states. [2019-11-23 22:15:34,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:34,111 INFO L93 Difference]: Finished difference Result 3929 states and 5663 transitions. [2019-11-23 22:15:34,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2019-11-23 22:15:34,112 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 171 [2019-11-23 22:15:34,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:34,122 INFO L225 Difference]: With dead ends: 3929 [2019-11-23 22:15:34,122 INFO L226 Difference]: Without dead ends: 3436 [2019-11-23 22:15:34,126 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18497 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=13468, Invalid=35152, Unknown=0, NotChecked=0, Total=48620 [2019-11-23 22:15:34,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2019-11-23 22:15:34,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 572. [2019-11-23 22:15:34,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2019-11-23 22:15:34,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 808 transitions. [2019-11-23 22:15:34,200 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 808 transitions. Word has length 171 [2019-11-23 22:15:34,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:34,200 INFO L462 AbstractCegarLoop]: Abstraction has 572 states and 808 transitions. [2019-11-23 22:15:34,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 22:15:34,201 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 808 transitions. [2019-11-23 22:15:34,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-23 22:15:34,202 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:34,203 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:34,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:34,407 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:34,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:34,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1264415264, now seen corresponding path program 19 times [2019-11-23 22:15:34,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:34,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131374669] [2019-11-23 22:15:34,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1615 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1215 trivial. 0 not checked. [2019-11-23 22:15:34,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131374669] [2019-11-23 22:15:34,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041871620] [2019-11-23 22:15:34,831 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 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 [2019-11-23 22:15:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:35,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:15:35,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1615 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1215 trivial. 0 not checked. [2019-11-23 22:15:35,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:35,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 22:15:35,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491360591] [2019-11-23 22:15:35,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:15:35,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:35,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:15:35,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:15:35,082 INFO L87 Difference]: Start difference. First operand 572 states and 808 transitions. Second operand 24 states. [2019-11-23 22:15:35,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:35,677 INFO L93 Difference]: Finished difference Result 1356 states and 1957 transitions. [2019-11-23 22:15:35,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:15:35,677 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 183 [2019-11-23 22:15:35,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:35,681 INFO L225 Difference]: With dead ends: 1356 [2019-11-23 22:15:35,681 INFO L226 Difference]: Without dead ends: 827 [2019-11-23 22:15:35,682 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:15:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2019-11-23 22:15:35,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 595. [2019-11-23 22:15:35,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2019-11-23 22:15:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 840 transitions. [2019-11-23 22:15:35,775 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 840 transitions. Word has length 183 [2019-11-23 22:15:35,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:35,775 INFO L462 AbstractCegarLoop]: Abstraction has 595 states and 840 transitions. [2019-11-23 22:15:35,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:15:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 840 transitions. [2019-11-23 22:15:35,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-11-23 22:15:35,777 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:35,777 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:35,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:35,982 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:35,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:35,982 INFO L82 PathProgramCache]: Analyzing trace with hash 939303908, now seen corresponding path program 20 times [2019-11-23 22:15:35,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:35,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126376815] [2019-11-23 22:15:35,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2019-11-23 22:15:36,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126376815] [2019-11-23 22:15:36,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065697905] [2019-11-23 22:15:36,374 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 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 [2019-11-23 22:15:36,542 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:15:36,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:36,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 22:15:36,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2019-11-23 22:15:36,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:36,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 22:15:36,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595185324] [2019-11-23 22:15:36,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:15:36,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:36,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:15:36,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:15:36,585 INFO L87 Difference]: Start difference. First operand 595 states and 840 transitions. Second operand 25 states. [2019-11-23 22:15:37,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:37,091 INFO L93 Difference]: Finished difference Result 1400 states and 2019 transitions. [2019-11-23 22:15:37,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:15:37,091 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 190 [2019-11-23 22:15:37,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:37,095 INFO L225 Difference]: With dead ends: 1400 [2019-11-23 22:15:37,095 INFO L226 Difference]: Without dead ends: 850 [2019-11-23 22:15:37,097 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:15:37,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2019-11-23 22:15:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 618. [2019-11-23 22:15:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2019-11-23 22:15:37,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 872 transitions. [2019-11-23 22:15:37,190 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 872 transitions. Word has length 190 [2019-11-23 22:15:37,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:37,190 INFO L462 AbstractCegarLoop]: Abstraction has 618 states and 872 transitions. [2019-11-23 22:15:37,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:15:37,191 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 872 transitions. [2019-11-23 22:15:37,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-11-23 22:15:37,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:37,193 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:37,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:37,397 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:37,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:37,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1439736292, now seen corresponding path program 21 times [2019-11-23 22:15:37,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:37,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958813694] [2019-11-23 22:15:37,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1920 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1436 trivial. 0 not checked. [2019-11-23 22:15:37,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958813694] [2019-11-23 22:15:37,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134334702] [2019-11-23 22:15:37,860 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 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 [2019-11-23 22:15:38,060 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 22:15:38,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:38,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 22:15:38,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:38,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:15:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1920 backedges. 21 proven. 302 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2019-11-23 22:15:38,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:38,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14] total 37 [2019-11-23 22:15:38,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408339117] [2019-11-23 22:15:38,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 22:15:38,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:38,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 22:15:38,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=971, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:15:38,396 INFO L87 Difference]: Start difference. First operand 618 states and 872 transitions. Second operand 37 states. [2019-11-23 22:15:55,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:55,196 INFO L93 Difference]: Finished difference Result 4979 states and 7181 transitions. [2019-11-23 22:15:55,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2019-11-23 22:15:55,196 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 197 [2019-11-23 22:15:55,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:55,209 INFO L225 Difference]: With dead ends: 4979 [2019-11-23 22:15:55,209 INFO L226 Difference]: Without dead ends: 4406 [2019-11-23 22:15:55,213 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29832 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=20890, Invalid=55010, Unknown=0, NotChecked=0, Total=75900 [2019-11-23 22:15:55,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4406 states. [2019-11-23 22:15:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4406 to 658. [2019-11-23 22:15:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2019-11-23 22:15:55,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 930 transitions. [2019-11-23 22:15:55,321 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 930 transitions. Word has length 197 [2019-11-23 22:15:55,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:55,322 INFO L462 AbstractCegarLoop]: Abstraction has 658 states and 930 transitions. [2019-11-23 22:15:55,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 22:15:55,322 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 930 transitions. [2019-11-23 22:15:55,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-11-23 22:15:55,324 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:55,324 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:55,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:55,528 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:55,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:55,529 INFO L82 PathProgramCache]: Analyzing trace with hash 775127562, now seen corresponding path program 22 times [2019-11-23 22:15:55,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:55,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581952984] [2019-11-23 22:15:55,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2141 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1612 trivial. 0 not checked. [2019-11-23 22:15:55,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581952984] [2019-11-23 22:15:55,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743945765] [2019-11-23 22:15:55,902 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 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 [2019-11-23 22:15:56,037 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:15:56,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:56,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:15:56,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2141 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1612 trivial. 0 not checked. [2019-11-23 22:15:56,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:56,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 22:15:56,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478000855] [2019-11-23 22:15:56,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:15:56,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:56,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:15:56,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:15:56,083 INFO L87 Difference]: Start difference. First operand 658 states and 930 transitions. Second operand 27 states. [2019-11-23 22:15:56,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:56,548 INFO L93 Difference]: Finished difference Result 1556 states and 2247 transitions. [2019-11-23 22:15:56,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:15:56,549 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 209 [2019-11-23 22:15:56,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:56,552 INFO L225 Difference]: With dead ends: 1556 [2019-11-23 22:15:56,552 INFO L226 Difference]: Without dead ends: 947 [2019-11-23 22:15:56,553 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:15:56,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2019-11-23 22:15:56,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 681. [2019-11-23 22:15:56,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2019-11-23 22:15:56,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 962 transitions. [2019-11-23 22:15:56,640 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 962 transitions. Word has length 209 [2019-11-23 22:15:56,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:56,641 INFO L462 AbstractCegarLoop]: Abstraction has 681 states and 962 transitions. [2019-11-23 22:15:56,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:15:56,641 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 962 transitions. [2019-11-23 22:15:56,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-11-23 22:15:56,642 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:56,642 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:56,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:56,843 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:56,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:56,844 INFO L82 PathProgramCache]: Analyzing trace with hash 743486298, now seen corresponding path program 23 times [2019-11-23 22:15:56,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:56,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034036844] [2019-11-23 22:15:56,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1736 trivial. 0 not checked. [2019-11-23 22:15:57,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034036844] [2019-11-23 22:15:57,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728205736] [2019-11-23 22:15:57,189 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 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 [2019-11-23 22:15:57,762 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-11-23 22:15:57,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:57,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:15:57,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1736 trivial. 0 not checked. [2019-11-23 22:15:57,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:57,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 22:15:57,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827468170] [2019-11-23 22:15:57,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:15:57,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:57,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:15:57,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:15:57,867 INFO L87 Difference]: Start difference. First operand 681 states and 962 transitions. Second operand 28 states. [2019-11-23 22:15:58,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:58,339 INFO L93 Difference]: Finished difference Result 1600 states and 2309 transitions. [2019-11-23 22:15:58,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:15:58,339 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 216 [2019-11-23 22:15:58,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:58,343 INFO L225 Difference]: With dead ends: 1600 [2019-11-23 22:15:58,343 INFO L226 Difference]: Without dead ends: 970 [2019-11-23 22:15:58,344 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:15:58,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2019-11-23 22:15:58,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 704. [2019-11-23 22:15:58,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704 states. [2019-11-23 22:15:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 994 transitions. [2019-11-23 22:15:58,431 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 994 transitions. Word has length 216 [2019-11-23 22:15:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:58,431 INFO L462 AbstractCegarLoop]: Abstraction has 704 states and 994 transitions. [2019-11-23 22:15:58,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:15:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 994 transitions. [2019-11-23 22:15:58,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-11-23 22:15:58,433 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:58,433 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:58,639 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:58,639 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:58,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:58,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1849921222, now seen corresponding path program 24 times [2019-11-23 22:15:58,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:58,641 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255673998] [2019-11-23 22:15:58,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2490 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1865 trivial. 0 not checked. [2019-11-23 22:15:59,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255673998] [2019-11-23 22:15:59,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291004385] [2019-11-23 22:15:59,093 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 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 [2019-11-23 22:16:00,095 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 22:16:00,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:16:00,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:16:00,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:16:00,339 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:16:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2490 backedges. 24 proven. 389 refuted. 0 times theorem prover too weak. 2077 trivial. 0 not checked. [2019-11-23 22:16:00,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:16:00,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 15] total 41 [2019-11-23 22:16:00,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878479102] [2019-11-23 22:16:00,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 22:16:00,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:16:00,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 22:16:00,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1190, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:16:00,408 INFO L87 Difference]: Start difference. First operand 704 states and 994 transitions. Second operand 41 states.