/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/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:13:19,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:13:19,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:13:19,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:13:19,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:13:19,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:13:19,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:13:19,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:13:19,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:13:19,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:13:19,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:13:19,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:13:19,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:13:19,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:13:19,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:13:19,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:13:19,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:13:19,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:13:19,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:13:19,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:13:19,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:13:19,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:13:19,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:13:19,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:13:19,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:13:19,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:13:19,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:13:19,455 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:13:19,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:13:19,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:13:19,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:13:19,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:13:19,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:13:19,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:13:19,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:13:19,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:13:19,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:13:19,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:13:19,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:13:19,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:13:19,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:13:19,474 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 09:13:19,519 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:13:19,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:13:19,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:13:19,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:13:19,522 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:13:19,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:13:19,522 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:13:19,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:13:19,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:13:19,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:13:19,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:13:19,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:13:19,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:13:19,525 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:13:19,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:13:19,526 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:13:19,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:13:19,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:13:19,526 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:13:19,526 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:13:19,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:13:19,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:13:19,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:13:19,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:13:19,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:13:19,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:13:19,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:13:19,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:13:19,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:13:19,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:13:19,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:13:19,912 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:13:19,916 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:13:19,918 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:13:19,918 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:13:19,919 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:13:19,984 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18b2b3c5a/d8cddb67cd2644b290d0f9c9c3fc0286/FLAG3ee9630bd [2020-10-14 09:13:20,482 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:13:20,483 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:13:20,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18b2b3c5a/d8cddb67cd2644b290d0f9c9c3fc0286/FLAG3ee9630bd [2020-10-14 09:13:20,799 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18b2b3c5a/d8cddb67cd2644b290d0f9c9c3fc0286 [2020-10-14 09:13:20,809 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:13:20,811 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:13:20,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:13:20,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:13:20,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:13:20,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:13:20" (1/1) ... [2020-10-14 09:13:20,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@243026c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:20, skipping insertion in model container [2020-10-14 09:13:20,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:13:20" (1/1) ... [2020-10-14 09:13:20,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:13:20,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:13:21,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:13:21,191 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:13:21,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:13:21,398 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:13:21,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:21 WrapperNode [2020-10-14 09:13:21,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:13:21,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:13:21,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:13:21,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:13:21,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:21" (1/1) ... [2020-10-14 09:13:21,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:21" (1/1) ... [2020-10-14 09:13:21,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:21" (1/1) ... [2020-10-14 09:13:21,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:21" (1/1) ... [2020-10-14 09:13:21,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:21" (1/1) ... [2020-10-14 09:13:21,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:21" (1/1) ... [2020-10-14 09:13:21,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:21" (1/1) ... [2020-10-14 09:13:21,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:13:21,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:13:21,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:13:21,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:13:21,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-14 09:13:21,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:13:21,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:13:21,512 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:13:21,512 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:13:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:13:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:13:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:13:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 09:13:21,513 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:13:21,513 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:13:21,513 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:13:21,513 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:13:21,513 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:13:21,513 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:13:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:13:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:13:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 09:13:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:13:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:13:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:13:21,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:13:21,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:13:22,152 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:13:22,153 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:13:22,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:13:22 BoogieIcfgContainer [2020-10-14 09:13:22,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:13:22,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:13:22,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:13:22,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:13:22,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:13:20" (1/3) ... [2020-10-14 09:13:22,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2438866d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:13:22, skipping insertion in model container [2020-10-14 09:13:22,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:21" (2/3) ... [2020-10-14 09:13:22,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2438866d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:13:22, skipping insertion in model container [2020-10-14 09:13:22,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:13:22" (3/3) ... [2020-10-14 09:13:22,177 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:13:22,190 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:13:22,202 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:13:22,217 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:13:22,254 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:13:22,254 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:13:22,255 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:13:22,255 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:13:22,255 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:13:22,255 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:13:22,255 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:13:22,255 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:13:22,274 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states. [2020-10-14 09:13:22,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 09:13:22,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:13:22,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:13:22,285 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:13:22,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:13:22,291 INFO L82 PathProgramCache]: Analyzing trace with hash 755670559, now seen corresponding path program 1 times [2020-10-14 09:13:22,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:13:22,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460257306] [2020-10-14 09:13:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:13:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:22,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:22,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:23,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:23,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:24,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:24,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 09:13:24,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:13:24,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2083 [2020-10-14 09:13:24,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:24,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:24,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:13:24,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 09:13:24,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 09:13:24,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 09:13:24,922 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:13:24,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:13:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:24,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:24,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:24,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:13:24,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:13:24,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 09:13:24,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:24,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:24,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:13:24,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:13:24,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:13:24,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:13:24,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460257306] [2020-10-14 09:13:24,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:13:24,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:13:24,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365545539] [2020-10-14 09:13:24,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:13:24,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:13:24,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:13:25,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:13:25,003 INFO L87 Difference]: Start difference. First operand 117 states. Second operand 4 states. [2020-10-14 09:13:25,198 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:13:25,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:13:25,966 INFO L93 Difference]: Finished difference Result 273 states and 432 transitions. [2020-10-14 09:13:25,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:13:25,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-14 09:13:25,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:13:25,996 INFO L225 Difference]: With dead ends: 273 [2020-10-14 09:13:25,997 INFO L226 Difference]: Without dead ends: 179 [2020-10-14 09:13:26,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:13:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-14 09:13:26,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-10-14 09:13:26,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-14 09:13:26,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 263 transitions. [2020-10-14 09:13:26,063 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 263 transitions. Word has length 53 [2020-10-14 09:13:26,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:13:26,063 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 263 transitions. [2020-10-14 09:13:26,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:13:26,064 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 263 transitions. [2020-10-14 09:13:26,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 09:13:26,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:13:26,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:13:26,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:13:26,067 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:13:26,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:13:26,068 INFO L82 PathProgramCache]: Analyzing trace with hash -261857778, now seen corresponding path program 1 times [2020-10-14 09:13:26,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:13:26,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119144810] [2020-10-14 09:13:26,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:13:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:26,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:26,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:26,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:26,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:26,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 09:13:26,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:13:26,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-14 09:13:26,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:26,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:26,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:13:26,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 09:13:26,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 09:13:26,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:26,947 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:13:26,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:13:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:26,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:26,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:26,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:13:26,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:13:26,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:13:26,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:26,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:26,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:13:26,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:13:26,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:13:26,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:13:26,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119144810] [2020-10-14 09:13:26,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:13:26,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:13:26,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452277503] [2020-10-14 09:13:26,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:13:26,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:13:26,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:13:26,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:13:26,982 INFO L87 Difference]: Start difference. First operand 177 states and 263 transitions. Second operand 4 states. [2020-10-14 09:13:27,117 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:13:27,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:13:27,565 INFO L93 Difference]: Finished difference Result 437 states and 675 transitions. [2020-10-14 09:13:27,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:13:27,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-14 09:13:27,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:13:27,570 INFO L225 Difference]: With dead ends: 437 [2020-10-14 09:13:27,570 INFO L226 Difference]: Without dead ends: 291 [2020-10-14 09:13:27,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:13:27,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-14 09:13:27,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 289. [2020-10-14 09:13:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-14 09:13:27,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 440 transitions. [2020-10-14 09:13:27,608 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 440 transitions. Word has length 54 [2020-10-14 09:13:27,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:13:27,608 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 440 transitions. [2020-10-14 09:13:27,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:13:27,609 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 440 transitions. [2020-10-14 09:13:27,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 09:13:27,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:13:27,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:13:27,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:13:27,611 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:13:27,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:13:27,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1124194663, now seen corresponding path program 1 times [2020-10-14 09:13:27,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:13:27,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380080939] [2020-10-14 09:13:27,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:13:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:27,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:27,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:27,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:27,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 09:13:27,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:13:27,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-14 09:13:27,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:27,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:27,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:13:27,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 09:13:27,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 09:13:27,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:28,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:13:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:28,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:28,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:28,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:13:28,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:13:28,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:13:28,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:28,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:28,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:13:28,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:13:28,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:13:28,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:13:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:13:28,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380080939] [2020-10-14 09:13:28,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:13:28,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:13:28,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310791569] [2020-10-14 09:13:28,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:13:28,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:13:28,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:13:28,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:13:28,135 INFO L87 Difference]: Start difference. First operand 289 states and 440 transitions. Second operand 4 states. [2020-10-14 09:13:28,275 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:13:28,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:13:28,786 INFO L93 Difference]: Finished difference Result 741 states and 1154 transitions. [2020-10-14 09:13:28,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:13:28,787 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-14 09:13:28,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:13:28,790 INFO L225 Difference]: With dead ends: 741 [2020-10-14 09:13:28,791 INFO L226 Difference]: Without dead ends: 483 [2020-10-14 09:13:28,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:13:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2020-10-14 09:13:28,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 481. [2020-10-14 09:13:28,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-10-14 09:13:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 740 transitions. [2020-10-14 09:13:28,860 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 740 transitions. Word has length 55 [2020-10-14 09:13:28,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:13:28,861 INFO L479 AbstractCegarLoop]: Abstraction has 481 states and 740 transitions. [2020-10-14 09:13:28,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:13:28,861 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 740 transitions. [2020-10-14 09:13:28,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 09:13:28,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:13:28,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:13:28,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:13:28,864 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:13:28,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:13:28,864 INFO L82 PathProgramCache]: Analyzing trace with hash 470821239, now seen corresponding path program 1 times [2020-10-14 09:13:28,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:13:28,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840682136] [2020-10-14 09:13:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:13:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:28,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:28,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:30,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:30,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 09:13:30,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:13:30,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1124 [2020-10-14 09:13:30,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:30,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:30,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:13:30,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:13:30,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 09:13:30,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:30,214 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:13:30,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:13:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:30,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:30,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:30,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:13:30,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:13:30,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:13:30,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:30,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:30,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:13:30,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:13:30,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:13:30,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:13:30,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840682136] [2020-10-14 09:13:30,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:13:30,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 09:13:30,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532899754] [2020-10-14 09:13:30,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:13:30,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:13:30,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:13:30,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:13:30,261 INFO L87 Difference]: Start difference. First operand 481 states and 740 transitions. Second operand 7 states. [2020-10-14 09:13:30,423 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-14 09:13:31,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:13:31,039 INFO L93 Difference]: Finished difference Result 2731 states and 4285 transitions. [2020-10-14 09:13:31,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 09:13:31,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-14 09:13:31,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:13:31,056 INFO L225 Difference]: With dead ends: 2731 [2020-10-14 09:13:31,057 INFO L226 Difference]: Without dead ends: 2281 [2020-10-14 09:13:31,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-14 09:13:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2020-10-14 09:13:31,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 929. [2020-10-14 09:13:31,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 929 states. [2020-10-14 09:13:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1432 transitions. [2020-10-14 09:13:31,163 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1432 transitions. Word has length 56 [2020-10-14 09:13:31,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:13:31,166 INFO L479 AbstractCegarLoop]: Abstraction has 929 states and 1432 transitions. [2020-10-14 09:13:31,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:13:31,166 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1432 transitions. [2020-10-14 09:13:31,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 09:13:31,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:13:31,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:13:31,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:13:31,178 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:13:31,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:13:31,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1692023771, now seen corresponding path program 1 times [2020-10-14 09:13:31,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:13:31,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993762060] [2020-10-14 09:13:31,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:13:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:31,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:31,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:31,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:31,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 09:13:31,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:13:31,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-14 09:13:31,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:31,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:31,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:13:31,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-14 09:13:31,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 09:13:31,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:31,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:13:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:31,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:31,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:31,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:13:31,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:13:31,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:13:31,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:31,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:31,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:13:31,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:13:31,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:13:31,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:13:31,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993762060] [2020-10-14 09:13:31,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:13:31,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:13:31,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146889647] [2020-10-14 09:13:31,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:13:31,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:13:31,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:13:31,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:13:31,911 INFO L87 Difference]: Start difference. First operand 929 states and 1432 transitions. Second operand 5 states. [2020-10-14 09:13:32,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:13:32,679 INFO L93 Difference]: Finished difference Result 1859 states and 2865 transitions. [2020-10-14 09:13:32,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:13:32,679 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-10-14 09:13:32,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:13:32,689 INFO L225 Difference]: With dead ends: 1859 [2020-10-14 09:13:32,689 INFO L226 Difference]: Without dead ends: 1857 [2020-10-14 09:13:32,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:13:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2020-10-14 09:13:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 961. [2020-10-14 09:13:32,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2020-10-14 09:13:32,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1464 transitions. [2020-10-14 09:13:32,783 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1464 transitions. Word has length 57 [2020-10-14 09:13:32,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:13:32,784 INFO L479 AbstractCegarLoop]: Abstraction has 961 states and 1464 transitions. [2020-10-14 09:13:32,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:13:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1464 transitions. [2020-10-14 09:13:32,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 09:13:32,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:13:32,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:13:32,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:13:32,787 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:13:32,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:13:32,787 INFO L82 PathProgramCache]: Analyzing trace with hash 922749094, now seen corresponding path program 1 times [2020-10-14 09:13:32,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:13:32,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084419572] [2020-10-14 09:13:32,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:13:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:32,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:32,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:33,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:33,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 09:13:33,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:13:33,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460 [2020-10-14 09:13:33,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:33,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:33,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:13:33,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:13:33,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 09:13:33,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:33,451 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:13:33,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:13:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:33,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:33,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:33,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:13:33,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:13:33,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:13:33,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:33,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:33,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:13:33,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:13:33,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:13:33,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:13:33,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084419572] [2020-10-14 09:13:33,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:13:33,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:13:33,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587113258] [2020-10-14 09:13:33,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:13:33,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:13:33,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:13:33,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:13:33,484 INFO L87 Difference]: Start difference. First operand 961 states and 1464 transitions. Second operand 4 states. [2020-10-14 09:13:33,624 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:13:34,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:13:34,141 INFO L93 Difference]: Finished difference Result 2709 states and 4138 transitions. [2020-10-14 09:13:34,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:13:34,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-14 09:13:34,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:13:34,152 INFO L225 Difference]: With dead ends: 2709 [2020-10-14 09:13:34,152 INFO L226 Difference]: Without dead ends: 1779 [2020-10-14 09:13:34,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:13:34,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2020-10-14 09:13:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1761. [2020-10-14 09:13:34,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1761 states. [2020-10-14 09:13:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2656 transitions. [2020-10-14 09:13:34,312 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2656 transitions. Word has length 58 [2020-10-14 09:13:34,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:13:34,313 INFO L479 AbstractCegarLoop]: Abstraction has 1761 states and 2656 transitions. [2020-10-14 09:13:34,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:13:34,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2656 transitions. [2020-10-14 09:13:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 09:13:34,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:13:34,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:13:34,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:13:34,315 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:13:34,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:13:34,315 INFO L82 PathProgramCache]: Analyzing trace with hash 5673895, now seen corresponding path program 1 times [2020-10-14 09:13:34,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:13:34,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514164891] [2020-10-14 09:13:34,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:13:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:34,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:34,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:34,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:34,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 09:13:34,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:13:34,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-14 09:13:34,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:34,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:34,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:13:34,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 09:13:34,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 09:13:34,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:34,778 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:13:34,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:13:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:34,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:34,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:34,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:13:34,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:13:34,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:13:34,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:34,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:34,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:13:34,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:13:34,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:13:34,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:13:34,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514164891] [2020-10-14 09:13:34,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:13:34,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:13:34,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704110683] [2020-10-14 09:13:34,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:13:34,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:13:34,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:13:34,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:13:34,817 INFO L87 Difference]: Start difference. First operand 1761 states and 2656 transitions. Second operand 4 states. [2020-10-14 09:13:35,003 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:13:35,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:13:35,869 INFO L93 Difference]: Finished difference Result 3336 states and 5062 transitions. [2020-10-14 09:13:35,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:13:35,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-14 09:13:35,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:13:35,884 INFO L225 Difference]: With dead ends: 3336 [2020-10-14 09:13:35,884 INFO L226 Difference]: Without dead ends: 2405 [2020-10-14 09:13:35,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:13:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2020-10-14 09:13:36,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 2403. [2020-10-14 09:13:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2403 states. [2020-10-14 09:13:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 3610 transitions. [2020-10-14 09:13:36,130 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 3610 transitions. Word has length 59 [2020-10-14 09:13:36,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:13:36,131 INFO L479 AbstractCegarLoop]: Abstraction has 2403 states and 3610 transitions. [2020-10-14 09:13:36,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:13:36,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 3610 transitions. [2020-10-14 09:13:36,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 09:13:36,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:13:36,136 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:13:36,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:13:36,136 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:13:36,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:13:36,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1870143215, now seen corresponding path program 1 times [2020-10-14 09:13:36,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:13:36,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526804289] [2020-10-14 09:13:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:13:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:36,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:36,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:36,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:36,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 09:13:36,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:13:36,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 635 [2020-10-14 09:13:36,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:36,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:36,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:13:36,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:13:36,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 09:13:36,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:36,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:13:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:36,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:36,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:36,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:13:36,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:13:36,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:13:36,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:36,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:36,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:13:36,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:13:36,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:13:36,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:13:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 09:13:37,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526804289] [2020-10-14 09:13:37,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:13:37,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 09:13:37,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028756331] [2020-10-14 09:13:37,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:13:37,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:13:37,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:13:37,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:13:37,021 INFO L87 Difference]: Start difference. First operand 2403 states and 3610 transitions. Second operand 5 states. [2020-10-14 09:13:37,174 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 09:13:38,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:13:38,151 INFO L93 Difference]: Finished difference Result 5497 states and 8301 transitions. [2020-10-14 09:13:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 09:13:38,152 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 81 [2020-10-14 09:13:38,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:13:38,171 INFO L225 Difference]: With dead ends: 5497 [2020-10-14 09:13:38,172 INFO L226 Difference]: Without dead ends: 3927 [2020-10-14 09:13:38,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:13:38,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3927 states. [2020-10-14 09:13:38,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3927 to 3907. [2020-10-14 09:13:38,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3907 states. [2020-10-14 09:13:38,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 5850 transitions. [2020-10-14 09:13:38,452 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 5850 transitions. Word has length 81 [2020-10-14 09:13:38,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:13:38,452 INFO L479 AbstractCegarLoop]: Abstraction has 3907 states and 5850 transitions. [2020-10-14 09:13:38,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:13:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 5850 transitions. [2020-10-14 09:13:38,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 09:13:38,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:13:38,462 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:13:38,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:13:38,463 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:13:38,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:13:38,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1252882277, now seen corresponding path program 1 times [2020-10-14 09:13:38,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:13:38,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360865941] [2020-10-14 09:13:38,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:13:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:38,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:38,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:38,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:38,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:39,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:39,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:41,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:43,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:43,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 09:13:43,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:13:43,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 09:13:43,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:43,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:43,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:13:43,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-14 09:13:43,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 09:13:43,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:43,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:13:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:43,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:43,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:43,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:13:43,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:13:43,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:13:43,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:43,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:43,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:13:43,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:13:43,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:13:43,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:13:43,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360865941] [2020-10-14 09:13:43,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:13:43,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:13:43,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700681189] [2020-10-14 09:13:43,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:13:43,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:13:43,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:13:43,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:13:43,671 INFO L87 Difference]: Start difference. First operand 3907 states and 5850 transitions. Second operand 4 states. [2020-10-14 09:13:43,801 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:13:44,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:13:44,851 INFO L93 Difference]: Finished difference Result 11215 states and 16764 transitions. [2020-10-14 09:13:44,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:13:44,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-14 09:13:44,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:13:44,891 INFO L225 Difference]: With dead ends: 11215 [2020-10-14 09:13:44,891 INFO L226 Difference]: Without dead ends: 7341 [2020-10-14 09:13:44,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:13:44,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7341 states. [2020-10-14 09:13:45,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7341 to 7339. [2020-10-14 09:13:45,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7339 states. [2020-10-14 09:13:45,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7339 states to 7339 states and 10866 transitions. [2020-10-14 09:13:45,484 INFO L78 Accepts]: Start accepts. Automaton has 7339 states and 10866 transitions. Word has length 81 [2020-10-14 09:13:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:13:45,485 INFO L479 AbstractCegarLoop]: Abstraction has 7339 states and 10866 transitions. [2020-10-14 09:13:45,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:13:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 7339 states and 10866 transitions. [2020-10-14 09:13:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 09:13:45,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:13:45,489 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:13:45,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:13:45,490 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:13:45,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:13:45,490 INFO L82 PathProgramCache]: Analyzing trace with hash -225568572, now seen corresponding path program 1 times [2020-10-14 09:13:45,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:13:45,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064560324] [2020-10-14 09:13:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:13:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:45,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:45,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:45,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:45,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:45,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:45,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:47,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:50,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:50,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 09:13:50,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:13:50,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 09:13:50,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:50,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:50,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:13:50,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 09:13:50,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 09:13:50,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:13:50,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:13:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:50,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:50,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:50,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:13:50,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:13:50,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:13:50,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:50,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:50,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:13:50,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:13:50,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:13:50,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:13:50,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064560324] [2020-10-14 09:13:50,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:13:50,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:13:50,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217212269] [2020-10-14 09:13:50,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:13:50,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:13:50,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:13:50,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:13:50,690 INFO L87 Difference]: Start difference. First operand 7339 states and 10866 transitions. Second operand 4 states. [2020-10-14 09:13:50,879 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:13:52,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:13:52,380 INFO L93 Difference]: Finished difference Result 21071 states and 31092 transitions. [2020-10-14 09:13:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:13:52,381 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-14 09:13:52,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:13:52,521 INFO L225 Difference]: With dead ends: 21071 [2020-10-14 09:13:52,521 INFO L226 Difference]: Without dead ends: 13765 [2020-10-14 09:13:52,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:13:52,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13765 states. [2020-10-14 09:13:53,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13765 to 13763. [2020-10-14 09:13:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13763 states. [2020-10-14 09:13:53,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13763 states to 13763 states and 20098 transitions. [2020-10-14 09:13:53,522 INFO L78 Accepts]: Start accepts. Automaton has 13763 states and 20098 transitions. Word has length 81 [2020-10-14 09:13:53,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:13:53,523 INFO L479 AbstractCegarLoop]: Abstraction has 13763 states and 20098 transitions. [2020-10-14 09:13:53,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:13:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 13763 states and 20098 transitions. [2020-10-14 09:13:53,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 09:13:53,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:13:53,528 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:13:53,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:13:53,529 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:13:53,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:13:53,529 INFO L82 PathProgramCache]: Analyzing trace with hash -712404403, now seen corresponding path program 1 times [2020-10-14 09:13:53,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:13:53,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331799072] [2020-10-14 09:13:53,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:13:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:53,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:53,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:53,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:53,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:53,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:54,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:54,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:58,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:58,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 09:13:58,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:13:58,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 09:13:58,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:58,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:58,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:13:58,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 09:13:58,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 09:13:58,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:58,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:13:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:58,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:58,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:58,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:13:58,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:13:58,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:13:58,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:58,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:58,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:13:58,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:13:58,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:13:58,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:13:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:13:58,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331799072] [2020-10-14 09:13:58,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:13:58,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:13:58,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012871760] [2020-10-14 09:13:58,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:13:58,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:13:58,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:13:58,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:13:58,747 INFO L87 Difference]: Start difference. First operand 13763 states and 20098 transitions. Second operand 4 states. [2020-10-14 09:13:58,881 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:14:00,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:14:00,836 INFO L93 Difference]: Finished difference Result 39463 states and 57348 transitions. [2020-10-14 09:14:00,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:14:00,836 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-14 09:14:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:14:00,908 INFO L225 Difference]: With dead ends: 39463 [2020-10-14 09:14:00,909 INFO L226 Difference]: Without dead ends: 25733 [2020-10-14 09:14:00,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:14:00,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25733 states. [2020-10-14 09:14:02,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25733 to 25731. [2020-10-14 09:14:02,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25731 states. [2020-10-14 09:14:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25731 states to 25731 states and 36962 transitions. [2020-10-14 09:14:02,404 INFO L78 Accepts]: Start accepts. Automaton has 25731 states and 36962 transitions. Word has length 81 [2020-10-14 09:14:02,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:14:02,404 INFO L479 AbstractCegarLoop]: Abstraction has 25731 states and 36962 transitions. [2020-10-14 09:14:02,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:14:02,405 INFO L276 IsEmpty]: Start isEmpty. Operand 25731 states and 36962 transitions. [2020-10-14 09:14:02,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 09:14:02,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:14:02,414 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:14:02,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:14:02,414 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:14:02,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:14:02,415 INFO L82 PathProgramCache]: Analyzing trace with hash 2007432621, now seen corresponding path program 1 times [2020-10-14 09:14:02,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:14:02,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359183486] [2020-10-14 09:14:02,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:14:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:02,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:02,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:02,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:02,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:03,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:05,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:05,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 09:14:05,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:14:05,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3112 [2020-10-14 09:14:05,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:05,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:05,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:14:05,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-14 09:14:05,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 09:14:05,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:14:05,673 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:14:05,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:14:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:05,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:05,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:05,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:14:05,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:14:05,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:14:05,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:05,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:05,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:14:05,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:14:05,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:14:05,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:14:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:14:05,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359183486] [2020-10-14 09:14:05,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:14:05,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:14:05,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708894993] [2020-10-14 09:14:05,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:14:05,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:14:05,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:14:05,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:14:05,707 INFO L87 Difference]: Start difference. First operand 25731 states and 36962 transitions. Second operand 4 states. [2020-10-14 09:14:05,853 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-14 09:14:08,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:14:08,086 INFO L93 Difference]: Finished difference Result 73159 states and 104420 transitions. [2020-10-14 09:14:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:14:08,086 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-14 09:14:08,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:14:08,220 INFO L225 Difference]: With dead ends: 73159 [2020-10-14 09:14:08,221 INFO L226 Difference]: Without dead ends: 47461 [2020-10-14 09:14:08,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:14:08,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47461 states. [2020-10-14 09:14:10,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47461 to 47459. [2020-10-14 09:14:10,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47459 states. [2020-10-14 09:14:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47459 states to 47459 states and 66850 transitions. [2020-10-14 09:14:10,780 INFO L78 Accepts]: Start accepts. Automaton has 47459 states and 66850 transitions. Word has length 82 [2020-10-14 09:14:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:14:10,781 INFO L479 AbstractCegarLoop]: Abstraction has 47459 states and 66850 transitions. [2020-10-14 09:14:10,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:14:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand 47459 states and 66850 transitions. [2020-10-14 09:14:10,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-14 09:14:10,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:14:10,795 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:14:10,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:14:10,796 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:14:10,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:14:10,796 INFO L82 PathProgramCache]: Analyzing trace with hash -221173842, now seen corresponding path program 1 times [2020-10-14 09:14:10,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:14:10,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008546343] [2020-10-14 09:14:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:14:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:10,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:10,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:10,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:11,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:11,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:12,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:13,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:13,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 09:14:13,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:14:13,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2970 [2020-10-14 09:14:13,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:13,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:13,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:14:13,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-14 09:14:13,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 09:14:13,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:14:13,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:14:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:13,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:13,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:13,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:14:13,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:14:13,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:14:13,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:13,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:13,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:14:13,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:14:13,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:14:13,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:14:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:14:13,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008546343] [2020-10-14 09:14:13,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:14:13,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:14:13,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498819093] [2020-10-14 09:14:13,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:14:13,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:14:13,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:14:13,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:14:13,992 INFO L87 Difference]: Start difference. First operand 47459 states and 66850 transitions. Second operand 4 states. [2020-10-14 09:14:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:14:16,085 INFO L93 Difference]: Finished difference Result 81001 states and 114171 transitions. [2020-10-14 09:14:16,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:14:16,086 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-14 09:14:16,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:14:16,178 INFO L225 Difference]: With dead ends: 81001 [2020-10-14 09:14:16,178 INFO L226 Difference]: Without dead ends: 33575 [2020-10-14 09:14:16,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:14:16,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33575 states. [2020-10-14 09:14:19,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33575 to 33573. [2020-10-14 09:14:19,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33573 states. [2020-10-14 09:14:19,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33573 states to 33573 states and 46825 transitions. [2020-10-14 09:14:19,262 INFO L78 Accepts]: Start accepts. Automaton has 33573 states and 46825 transitions. Word has length 83 [2020-10-14 09:14:19,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:14:19,263 INFO L479 AbstractCegarLoop]: Abstraction has 33573 states and 46825 transitions. [2020-10-14 09:14:19,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:14:19,263 INFO L276 IsEmpty]: Start isEmpty. Operand 33573 states and 46825 transitions. [2020-10-14 09:14:19,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 09:14:19,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:14:19,271 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:14:19,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:14:19,271 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:14:19,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:14:19,272 INFO L82 PathProgramCache]: Analyzing trace with hash -175371370, now seen corresponding path program 1 times [2020-10-14 09:14:19,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:14:19,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785666652] [2020-10-14 09:14:19,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:14:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:19,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:19,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:19,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:19,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:19,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:20,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:20,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 09:14:20,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:14:20,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1146 [2020-10-14 09:14:20,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:20,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:20,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:14:20,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 09:14:20,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 09:14:20,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:14:20,607 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:14:20,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:14:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:20,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:20,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:20,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:14:20,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:14:20,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:14:20,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:20,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:20,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:14:20,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:14:20,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:14:20,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:14:20,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 09:14:20,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785666652] [2020-10-14 09:14:20,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:14:20,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:14:20,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064536296] [2020-10-14 09:14:20,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:14:20,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:14:20,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:14:20,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:14:20,653 INFO L87 Difference]: Start difference. First operand 33573 states and 46825 transitions. Second operand 7 states. [2020-10-14 09:14:20,832 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 09:14:26,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:14:26,002 INFO L93 Difference]: Finished difference Result 117345 states and 166219 transitions. [2020-10-14 09:14:26,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:14:26,002 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-10-14 09:14:26,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:14:26,196 INFO L225 Difference]: With dead ends: 117345 [2020-10-14 09:14:26,196 INFO L226 Difference]: Without dead ends: 102527 [2020-10-14 09:14:26,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:14:26,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102527 states. [2020-10-14 09:14:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102527 to 53116. [2020-10-14 09:14:30,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53116 states. [2020-10-14 09:14:30,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53116 states to 53116 states and 74045 transitions. [2020-10-14 09:14:30,967 INFO L78 Accepts]: Start accepts. Automaton has 53116 states and 74045 transitions. Word has length 84 [2020-10-14 09:14:30,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:14:30,967 INFO L479 AbstractCegarLoop]: Abstraction has 53116 states and 74045 transitions. [2020-10-14 09:14:30,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:14:30,968 INFO L276 IsEmpty]: Start isEmpty. Operand 53116 states and 74045 transitions. [2020-10-14 09:14:30,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 09:14:30,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:14:30,976 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:14:30,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:14:30,976 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:14:30,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:14:30,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1632818759, now seen corresponding path program 1 times [2020-10-14 09:14:30,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:14:30,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361357976] [2020-10-14 09:14:30,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:14:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:31,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:31,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:31,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:31,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:31,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:32,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:32,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 09:14:32,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:14:32,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1362 [2020-10-14 09:14:32,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:32,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:32,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:14:32,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:14:32,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 09:14:32,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:14:32,518 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 09:14:32,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:14:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:32,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:32,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:32,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:14:32,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:14:32,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:14:32,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:32,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:32,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:14:32,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:14:32,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:14:32,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:14:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 09:14:32,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361357976] [2020-10-14 09:14:32,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:14:32,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:14:32,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493230986] [2020-10-14 09:14:32,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:14:32,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:14:32,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:14:32,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:14:32,553 INFO L87 Difference]: Start difference. First operand 53116 states and 74045 transitions. Second operand 7 states. [2020-10-14 09:14:32,713 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 09:14:39,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:14:39,003 INFO L93 Difference]: Finished difference Result 135161 states and 189840 transitions. [2020-10-14 09:14:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:14:39,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-10-14 09:14:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:14:39,223 INFO L225 Difference]: With dead ends: 135161 [2020-10-14 09:14:39,224 INFO L226 Difference]: Without dead ends: 114023 [2020-10-14 09:14:39,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:14:39,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114023 states. [2020-10-14 09:14:45,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114023 to 60239. [2020-10-14 09:14:45,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60239 states. [2020-10-14 09:14:45,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60239 states to 60239 states and 83993 transitions. [2020-10-14 09:14:45,267 INFO L78 Accepts]: Start accepts. Automaton has 60239 states and 83993 transitions. Word has length 84 [2020-10-14 09:14:45,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:14:45,268 INFO L479 AbstractCegarLoop]: Abstraction has 60239 states and 83993 transitions. [2020-10-14 09:14:45,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:14:45,268 INFO L276 IsEmpty]: Start isEmpty. Operand 60239 states and 83993 transitions. [2020-10-14 09:14:45,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 09:14:45,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:14:45,276 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:14:45,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:14:45,277 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:14:45,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:14:45,277 INFO L82 PathProgramCache]: Analyzing trace with hash -897487382, now seen corresponding path program 1 times [2020-10-14 09:14:45,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:14:45,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607820066] [2020-10-14 09:14:45,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:14:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:45,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:45,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:45,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:45,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:45,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:46,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:46,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 09:14:46,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:14:46,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1668 [2020-10-14 09:14:46,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:46,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:46,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:14:46,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:14:46,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 09:14:46,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:14:47,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:14:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:47,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:47,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:47,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:14:47,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:14:47,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:14:47,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:47,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:47,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:14:47,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:14:47,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:14:47,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:14:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 09:14:47,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607820066] [2020-10-14 09:14:47,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:14:47,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:14:47,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535083450] [2020-10-14 09:14:47,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:14:47,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:14:47,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:14:47,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:14:47,135 INFO L87 Difference]: Start difference. First operand 60239 states and 83993 transitions. Second operand 7 states. [2020-10-14 09:14:47,294 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 09:14:54,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:14:54,431 INFO L93 Difference]: Finished difference Result 141519 states and 198628 transitions. [2020-10-14 09:14:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:14:54,431 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-10-14 09:14:54,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:14:54,577 INFO L225 Difference]: With dead ends: 141519 [2020-10-14 09:14:54,578 INFO L226 Difference]: Without dead ends: 120613 [2020-10-14 09:14:54,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:14:54,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120613 states. [2020-10-14 09:15:01,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120613 to 67084. [2020-10-14 09:15:01,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67084 states. [2020-10-14 09:15:01,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67084 states to 67084 states and 93533 transitions. [2020-10-14 09:15:01,258 INFO L78 Accepts]: Start accepts. Automaton has 67084 states and 93533 transitions. Word has length 84 [2020-10-14 09:15:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:15:01,259 INFO L479 AbstractCegarLoop]: Abstraction has 67084 states and 93533 transitions. [2020-10-14 09:15:01,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:15:01,259 INFO L276 IsEmpty]: Start isEmpty. Operand 67084 states and 93533 transitions. [2020-10-14 09:15:01,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 09:15:01,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:15:01,265 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:15:01,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 09:15:01,265 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:15:01,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:15:01,266 INFO L82 PathProgramCache]: Analyzing trace with hash -851882335, now seen corresponding path program 1 times [2020-10-14 09:15:01,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:15:01,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351441394] [2020-10-14 09:15:01,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:15:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:15:01,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:01,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:01,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:01,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:02,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:02,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:15:02,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 09:15:02,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:15:02,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1553 [2020-10-14 09:15:02,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:15:02,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:15:02,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:15:02,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:15:02,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 09:15:02,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:15:02,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:15:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:15:02,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:02,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:15:02,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:15:03,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:15:03,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:15:03,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:15:03,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:15:03,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:15:03,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:15:03,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:15:03,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:15:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 09:15:03,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351441394] [2020-10-14 09:15:03,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:15:03,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:15:03,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094168021] [2020-10-14 09:15:03,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:15:03,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:15:03,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:15:03,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:15:03,016 INFO L87 Difference]: Start difference. First operand 67084 states and 93533 transitions. Second operand 7 states. [2020-10-14 09:15:03,173 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 09:15:10,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:15:10,915 INFO L93 Difference]: Finished difference Result 146315 states and 205236 transitions. [2020-10-14 09:15:10,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:15:10,916 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-10-14 09:15:10,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:15:11,066 INFO L225 Difference]: With dead ends: 146315 [2020-10-14 09:15:11,067 INFO L226 Difference]: Without dead ends: 125641 [2020-10-14 09:15:11,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:15:11,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125641 states. [2020-10-14 09:15:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125641 to 73582. [2020-10-14 09:15:15,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73582 states. [2020-10-14 09:15:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73582 states to 73582 states and 102557 transitions. [2020-10-14 09:15:15,983 INFO L78 Accepts]: Start accepts. Automaton has 73582 states and 102557 transitions. Word has length 84 [2020-10-14 09:15:15,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:15:15,983 INFO L479 AbstractCegarLoop]: Abstraction has 73582 states and 102557 transitions. [2020-10-14 09:15:15,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:15:15,984 INFO L276 IsEmpty]: Start isEmpty. Operand 73582 states and 102557 transitions. [2020-10-14 09:15:15,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-14 09:15:15,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:15:15,992 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:15:15,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 09:15:15,992 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:15:15,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:15:15,992 INFO L82 PathProgramCache]: Analyzing trace with hash 2039870869, now seen corresponding path program 1 times [2020-10-14 09:15:15,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:15:15,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220852953] [2020-10-14 09:15:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:15:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:15:16,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:16,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:16,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:16,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:16,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:16,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:16,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:16,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:16,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:17,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:17,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:19,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:19,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:19,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:20,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:20,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:20,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:20,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:20,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:20,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:21,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:15:21,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 09:15:21,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-14 09:15:21,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:15:21,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:15:21,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:15:21,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:15:21,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:15:21,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 09:15:21,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:15:21,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:15:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:15:21,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:15:21,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:15:21,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:15:21,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:15:21,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:15:21,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:15:21,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:15:21,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:15:21,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:15:21,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:15:21,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:15:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:15:21,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220852953] [2020-10-14 09:15:21,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:15:21,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 09:15:21,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294449298] [2020-10-14 09:15:21,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:15:21,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:15:21,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:15:21,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:15:21,166 INFO L87 Difference]: Start difference. First operand 73582 states and 102557 transitions. Second operand 6 states. [2020-10-14 09:15:47,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:15:47,116 INFO L93 Difference]: Finished difference Result 403760 states and 561236 transitions. [2020-10-14 09:15:47,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:15:47,116 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2020-10-14 09:15:47,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:15:47,637 INFO L225 Difference]: With dead ends: 403760 [2020-10-14 09:15:47,638 INFO L226 Difference]: Without dead ends: 332037 [2020-10-14 09:15:47,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-14 09:15:47,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332037 states. [2020-10-14 09:16:08,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332037 to 256975. [2020-10-14 09:16:08,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256975 states. [2020-10-14 09:16:08,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256975 states to 256975 states and 355562 transitions. [2020-10-14 09:16:08,975 INFO L78 Accepts]: Start accepts. Automaton has 256975 states and 355562 transitions. Word has length 89 [2020-10-14 09:16:08,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:16:08,975 INFO L479 AbstractCegarLoop]: Abstraction has 256975 states and 355562 transitions. [2020-10-14 09:16:08,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:16:08,975 INFO L276 IsEmpty]: Start isEmpty. Operand 256975 states and 355562 transitions. [2020-10-14 09:16:08,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-14 09:16:08,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:16:08,993 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:16:08,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 09:16:08,994 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:16:08,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:16:08,994 INFO L82 PathProgramCache]: Analyzing trace with hash -562394310, now seen corresponding path program 1 times [2020-10-14 09:16:08,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:16:08,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925868770] [2020-10-14 09:16:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:16:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:16:09,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:09,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:09,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:09,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:09,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:09,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:09,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:10,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:10,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:10,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:10,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:10,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:10,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:10,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:10,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:11,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:11,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:11,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:11,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:11,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:12,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:12,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:12,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:12,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:14,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:16:14,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 09:16:14,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-14 09:16:14,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 09:16:14,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:16:14,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:16:14,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:16:14,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 09:16:14,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 09:16:14,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:16:14,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:16:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:16:14,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:14,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:16:14,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:16:14,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:16:14,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:16:14,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:16:14,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:16:14,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:16:14,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:16:14,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:16:14,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:16:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:16:14,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925868770] [2020-10-14 09:16:14,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:16:14,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 09:16:14,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115590355] [2020-10-14 09:16:14,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:16:14,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:16:14,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:16:14,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:16:14,170 INFO L87 Difference]: Start difference. First operand 256975 states and 355562 transitions. Second operand 6 states. [2020-10-14 09:16:14,299 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 119