/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.6.1.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:51:15,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:51:15,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:51:15,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:51:15,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:51:15,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:51:15,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:51:15,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:51:15,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:51:15,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:51:15,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:51:15,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:51:15,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:51:15,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:51:15,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:51:15,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:51:15,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:51:15,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:51:15,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:51:15,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:51:15,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:51:15,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:51:15,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:51:15,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:51:15,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:51:15,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:51:15,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:51:15,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:51:15,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:51:15,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:51:15,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:51:15,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:51:15,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:51:15,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:51:15,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:51:15,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:51:15,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:51:15,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:51:15,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:51:15,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:51:15,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:51:15,405 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 08:51:15,446 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:51:15,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:51:15,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:51:15,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:51:15,449 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:51:15,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:51:15,449 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:51:15,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:51:15,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:51:15,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:51:15,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:51:15,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:51:15,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:51:15,452 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:51:15,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:51:15,452 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:51:15,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:51:15,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:51:15,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:51:15,453 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:51:15,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:51:15,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:51:15,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:51:15,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:51:15,454 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:51:15,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:51:15,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:51:15,455 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:51:15,455 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:51:15,455 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 08:51:15,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:51:15,779 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:51:15,782 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:51:15,784 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:51:15,785 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:51:15,785 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2020-10-14 08:51:15,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96df66088/541958e1bbfe44dea6119bafcac9b085/FLAG8d16f6775 [2020-10-14 08:51:16,443 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:51:16,443 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2020-10-14 08:51:16,466 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96df66088/541958e1bbfe44dea6119bafcac9b085/FLAG8d16f6775 [2020-10-14 08:51:16,674 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96df66088/541958e1bbfe44dea6119bafcac9b085 [2020-10-14 08:51:16,684 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:51:16,686 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:51:16,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:51:16,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:51:16,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:51:16,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:51:16" (1/1) ... [2020-10-14 08:51:16,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58caa8f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:16, skipping insertion in model container [2020-10-14 08:51:16,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:51:16" (1/1) ... [2020-10-14 08:51:16,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:51:16,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:51:17,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:51:17,353 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:51:17,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:51:17,593 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:51:17,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:17 WrapperNode [2020-10-14 08:51:17,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:51:17,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:51:17,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:51:17,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:51:17,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:17" (1/1) ... [2020-10-14 08:51:17,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:17" (1/1) ... [2020-10-14 08:51:17,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:17" (1/1) ... [2020-10-14 08:51:17,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:17" (1/1) ... [2020-10-14 08:51:17,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:17" (1/1) ... [2020-10-14 08:51:17,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:17" (1/1) ... [2020-10-14 08:51:17,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:17" (1/1) ... [2020-10-14 08:51:17,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:51:17,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:51:17,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:51:17,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:51:17,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:17" (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 08:51:17,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:51:17,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:51:17,850 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:51:17,850 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:51:17,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:51:17,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:51:17,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:51:17,851 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:51:17,851 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:51:17,851 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:51:17,852 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:51:17,852 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:51:17,852 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:51:17,852 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:51:17,852 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:51:17,853 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 08:51:17,853 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-14 08:51:17,853 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-14 08:51:17,853 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:51:17,853 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:51:17,854 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:51:17,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:51:17,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:51:19,350 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:51:19,351 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:51:19,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:51:19 BoogieIcfgContainer [2020-10-14 08:51:19,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:51:19,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:51:19,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:51:19,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:51:19,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:51:16" (1/3) ... [2020-10-14 08:51:19,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea27584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:51:19, skipping insertion in model container [2020-10-14 08:51:19,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:51:17" (2/3) ... [2020-10-14 08:51:19,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea27584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:51:19, skipping insertion in model container [2020-10-14 08:51:19,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:51:19" (3/3) ... [2020-10-14 08:51:19,367 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2020-10-14 08:51:19,382 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:51:19,391 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:51:19,406 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:51:19,442 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:51:19,442 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:51:19,443 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:51:19,443 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:51:19,443 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:51:19,443 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:51:19,443 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:51:19,443 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:51:19,476 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states. [2020-10-14 08:51:19,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-14 08:51:19,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:51:19,497 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:51:19,498 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:51:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:51:19,504 INFO L82 PathProgramCache]: Analyzing trace with hash -339565854, now seen corresponding path program 1 times [2020-10-14 08:51:19,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:51:19,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70665627] [2020-10-14 08:51:19,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:51:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:19,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:20,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:20,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:20,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:20,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:20,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:20,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:20,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:20,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:21,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:21,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:24,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:24,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:24,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:51:24,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-14 08:51:24,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 08:51:24,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-14 08:51:24,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:51:24,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:51:24,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:51:24,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 08:51:24,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 08:51:24,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 08:51:25,358 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 08:51:25,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:51:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:25,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:25,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:51:25,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:51:25,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:51:25,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 08:51:25,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:51:25,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:51:25,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:51:25,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:51:25,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:51:25,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 08:51:25,457 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 08:51:25,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70665627] [2020-10-14 08:51:25,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:51:25,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:51:25,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516129445] [2020-10-14 08:51:25,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:51:25,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:51:25,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:51:25,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:51:25,486 INFO L87 Difference]: Start difference. First operand 395 states. Second operand 4 states. [2020-10-14 08:51:25,825 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-14 08:51:27,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:51:27,781 INFO L93 Difference]: Finished difference Result 949 states and 1542 transitions. [2020-10-14 08:51:27,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:51:27,784 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-10-14 08:51:27,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:51:27,805 INFO L225 Difference]: With dead ends: 949 [2020-10-14 08:51:27,805 INFO L226 Difference]: Without dead ends: 688 [2020-10-14 08:51:27,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:51:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2020-10-14 08:51:27,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 670. [2020-10-14 08:51:27,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2020-10-14 08:51:27,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1079 transitions. [2020-10-14 08:51:27,918 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1079 transitions. Word has length 151 [2020-10-14 08:51:27,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:51:27,919 INFO L479 AbstractCegarLoop]: Abstraction has 670 states and 1079 transitions. [2020-10-14 08:51:27,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:51:27,920 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1079 transitions. [2020-10-14 08:51:27,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-14 08:51:27,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:51:27,934 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:51:27,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:51:27,935 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:51:27,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:51:27,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1560441812, now seen corresponding path program 1 times [2020-10-14 08:51:27,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:51:27,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184917146] [2020-10-14 08:51:27,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:51:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:28,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:28,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:28,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:28,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:28,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:28,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:28,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:28,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:28,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:28,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:30,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:33,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:51:33,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-14 08:51:33,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 08:51:33,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 08:51:33,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:51:33,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:51:33,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:51:33,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-14 08:51:33,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 08:51:33,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:51:33,264 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 08:51:33,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:51:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:33,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:33,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:51:33,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:51:33,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:51:33,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:51:33,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:51:33,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:51:33,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:51:33,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:51:33,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:51:33,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:51:33,362 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 08:51:33,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184917146] [2020-10-14 08:51:33,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:51:33,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:51:33,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373273515] [2020-10-14 08:51:33,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:51:33,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:51:33,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:51:33,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:51:33,369 INFO L87 Difference]: Start difference. First operand 670 states and 1079 transitions. Second operand 4 states. [2020-10-14 08:51:33,566 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-14 08:51:35,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:51:35,372 INFO L93 Difference]: Finished difference Result 1754 states and 2801 transitions. [2020-10-14 08:51:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:51:35,373 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2020-10-14 08:51:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:51:35,383 INFO L225 Difference]: With dead ends: 1754 [2020-10-14 08:51:35,383 INFO L226 Difference]: Without dead ends: 1250 [2020-10-14 08:51:35,388 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 08:51:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2020-10-14 08:51:35,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1216. [2020-10-14 08:51:35,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1216 states. [2020-10-14 08:51:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1941 transitions. [2020-10-14 08:51:35,468 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1941 transitions. Word has length 153 [2020-10-14 08:51:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:51:35,468 INFO L479 AbstractCegarLoop]: Abstraction has 1216 states and 1941 transitions. [2020-10-14 08:51:35,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:51:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1941 transitions. [2020-10-14 08:51:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-14 08:51:35,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:51:35,473 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:51:35,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:51:35,474 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:51:35,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:51:35,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1068273445, now seen corresponding path program 1 times [2020-10-14 08:51:35,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:51:35,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556037245] [2020-10-14 08:51:35,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:51:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:35,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:35,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:35,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:35,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:35,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:36,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:36,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:36,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:36,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:37,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:40,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:40,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:40,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:51:40,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-14 08:51:40,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 08:51:40,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-14 08:51:40,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:51:40,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:51:40,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:51:40,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-14 08:51:40,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 08:51:40,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:51:40,795 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 08:51:40,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:51:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:40,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:40,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:51:40,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:51:40,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:51:40,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-14 08:51:40,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:51:40,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:51:40,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:51:40,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:51:40,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:51:40,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:51:40,922 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 08:51:40,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556037245] [2020-10-14 08:51:40,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:51:40,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:51:40,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641926662] [2020-10-14 08:51:40,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:51:40,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:51:40,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:51:40,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:51:40,925 INFO L87 Difference]: Start difference. First operand 1216 states and 1941 transitions. Second operand 4 states. [2020-10-14 08:51:43,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:51:43,411 INFO L93 Difference]: Finished difference Result 3104 states and 4931 transitions. [2020-10-14 08:51:43,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:51:43,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2020-10-14 08:51:43,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:51:43,425 INFO L225 Difference]: With dead ends: 3104 [2020-10-14 08:51:43,425 INFO L226 Difference]: Without dead ends: 2268 [2020-10-14 08:51:43,432 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 08:51:43,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2020-10-14 08:51:43,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 2266. [2020-10-14 08:51:43,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2266 states. [2020-10-14 08:51:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 3597 transitions. [2020-10-14 08:51:43,573 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 3597 transitions. Word has length 155 [2020-10-14 08:51:43,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:51:43,576 INFO L479 AbstractCegarLoop]: Abstraction has 2266 states and 3597 transitions. [2020-10-14 08:51:43,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:51:43,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 3597 transitions. [2020-10-14 08:51:43,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-14 08:51:43,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:51:43,596 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:51:43,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:51:43,596 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:51:43,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:51:43,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1342462666, now seen corresponding path program 1 times [2020-10-14 08:51:43,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:51:43,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172343163] [2020-10-14 08:51:43,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:51:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:43,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:43,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:43,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:43,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:43,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:43,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:44,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:44,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:44,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:46,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:46,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:48,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:51:48,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-14 08:51:48,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 08:51:48,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 08:51:48,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:51:48,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:51:48,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:51:48,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-14 08:51:48,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 08:51:48,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:51:48,917 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 08:51:48,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:51:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:48,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:48,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:51:48,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:51:48,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:51:48,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 08:51:48,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:51:48,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:51:48,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:51:48,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:51:48,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:51:48,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:51:48,987 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 08:51:48,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172343163] [2020-10-14 08:51:48,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:51:48,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:51:48,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299617749] [2020-10-14 08:51:48,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:51:48,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:51:48,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:51:48,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:51:48,990 INFO L87 Difference]: Start difference. First operand 2266 states and 3597 transitions. Second operand 4 states. [2020-10-14 08:51:49,194 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-14 08:51:51,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:51:51,497 INFO L93 Difference]: Finished difference Result 5784 states and 9143 transitions. [2020-10-14 08:51:51,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:51:51,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2020-10-14 08:51:51,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:51:51,522 INFO L225 Difference]: With dead ends: 5784 [2020-10-14 08:51:51,522 INFO L226 Difference]: Without dead ends: 4164 [2020-10-14 08:51:51,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:51:51,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4164 states. [2020-10-14 08:51:51,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4164 to 4034. [2020-10-14 08:51:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4034 states. [2020-10-14 08:51:51,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4034 states to 4034 states and 6351 transitions. [2020-10-14 08:51:51,719 INFO L78 Accepts]: Start accepts. Automaton has 4034 states and 6351 transitions. Word has length 155 [2020-10-14 08:51:51,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:51:51,720 INFO L479 AbstractCegarLoop]: Abstraction has 4034 states and 6351 transitions. [2020-10-14 08:51:51,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:51:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand 4034 states and 6351 transitions. [2020-10-14 08:51:51,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-14 08:51:51,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:51:51,730 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:51:51,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:51:51,730 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:51:51,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:51:51,731 INFO L82 PathProgramCache]: Analyzing trace with hash -812157524, now seen corresponding path program 1 times [2020-10-14 08:51:51,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:51:51,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52832053] [2020-10-14 08:51:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:51:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:51,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:51,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:51,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:51,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:52,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:52,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:52,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:52,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:53,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:55,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:55,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:56,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:51:56,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-14 08:51:56,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 08:51:56,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 08:51:56,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:51:56,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:51:56,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:51:56,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-14 08:51:56,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 08:51:56,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:51:57,038 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 08:51:57,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:51:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:57,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:57,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:51:57,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:51:57,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:51:57,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 08:51:57,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:51:57,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:51:57,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:51:57,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:51:57,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:51:57,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:51:57,114 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 08:51:57,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52832053] [2020-10-14 08:51:57,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:51:57,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:51:57,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532864334] [2020-10-14 08:51:57,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:51:57,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:51:57,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:51:57,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:51:57,118 INFO L87 Difference]: Start difference. First operand 4034 states and 6351 transitions. Second operand 4 states. [2020-10-14 08:51:57,327 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 08:51:59,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:51:59,254 INFO L93 Difference]: Finished difference Result 10338 states and 16209 transitions. [2020-10-14 08:51:59,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:51:59,257 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2020-10-14 08:51:59,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:51:59,295 INFO L225 Difference]: With dead ends: 10338 [2020-10-14 08:51:59,296 INFO L226 Difference]: Without dead ends: 7452 [2020-10-14 08:51:59,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:51:59,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7452 states. [2020-10-14 08:51:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7452 to 7194. [2020-10-14 08:51:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7194 states. [2020-10-14 08:51:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 11219 transitions. [2020-10-14 08:51:59,633 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 11219 transitions. Word has length 157 [2020-10-14 08:51:59,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:51:59,634 INFO L479 AbstractCegarLoop]: Abstraction has 7194 states and 11219 transitions. [2020-10-14 08:51:59,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:51:59,634 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 11219 transitions. [2020-10-14 08:51:59,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-14 08:51:59,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:51:59,651 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:51:59,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:51:59,651 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:51:59,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:51:59,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1751044994, now seen corresponding path program 1 times [2020-10-14 08:51:59,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:51:59,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115850714] [2020-10-14 08:51:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:51:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:51:59,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:59,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:59,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:59,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:59,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:51:59,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:00,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:00,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:04,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:04,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-14 08:52:04,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:52:04,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 08:52:04,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:04,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:04,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:52:04,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-14 08:52:04,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 08:52:04,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:04,918 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 08:52:04,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:52:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:04,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:04,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:04,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:52:04,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:04,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:52:04,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:04,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:04,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:52:04,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:52:04,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:52:04,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:04,981 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 08:52:04,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115850714] [2020-10-14 08:52:04,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:52:04,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:52:04,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114481797] [2020-10-14 08:52:04,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:52:04,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:52:04,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:52:04,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:52:04,984 INFO L87 Difference]: Start difference. First operand 7194 states and 11219 transitions. Second operand 4 states. [2020-10-14 08:52:05,192 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-14 08:52:07,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:52:07,692 INFO L93 Difference]: Finished difference Result 20068 states and 31173 transitions. [2020-10-14 08:52:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:52:07,693 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2020-10-14 08:52:07,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:52:07,746 INFO L225 Difference]: With dead ends: 20068 [2020-10-14 08:52:07,746 INFO L226 Difference]: Without dead ends: 13786 [2020-10-14 08:52:07,763 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 08:52:07,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13786 states. [2020-10-14 08:52:08,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13786 to 13272. [2020-10-14 08:52:08,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13272 states. [2020-10-14 08:52:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13272 states to 13272 states and 20491 transitions. [2020-10-14 08:52:08,366 INFO L78 Accepts]: Start accepts. Automaton has 13272 states and 20491 transitions. Word has length 159 [2020-10-14 08:52:08,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:52:08,366 INFO L479 AbstractCegarLoop]: Abstraction has 13272 states and 20491 transitions. [2020-10-14 08:52:08,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:52:08,366 INFO L276 IsEmpty]: Start isEmpty. Operand 13272 states and 20491 transitions. [2020-10-14 08:52:08,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-14 08:52:08,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:52:08,401 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:52:08,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:52:08,402 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:52:08,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:52:08,402 INFO L82 PathProgramCache]: Analyzing trace with hash 865363724, now seen corresponding path program 1 times [2020-10-14 08:52:08,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:52:08,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623699871] [2020-10-14 08:52:08,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:52:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:08,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:08,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:08,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:08,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:08,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:08,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:08,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:10,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:13,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:13,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-14 08:52:13,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:52:13,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 08:52:13,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:13,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:13,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:52:13,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-14 08:52:13,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 08:52:13,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:13,659 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 08:52:13,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:52:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:13,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:13,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:13,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:52:13,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:13,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:52:13,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:13,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:13,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:52:13,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:52:13,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:52:13,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:52:13,708 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 08:52:13,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623699871] [2020-10-14 08:52:13,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:52:13,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:52:13,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52461420] [2020-10-14 08:52:13,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:52:13,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:52:13,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:52:13,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:52:13,711 INFO L87 Difference]: Start difference. First operand 13272 states and 20491 transitions. Second operand 4 states. [2020-10-14 08:52:13,911 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-14 08:52:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:52:16,667 INFO L93 Difference]: Finished difference Result 36020 states and 55373 transitions. [2020-10-14 08:52:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:52:16,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2020-10-14 08:52:16,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:52:16,722 INFO L225 Difference]: With dead ends: 36020 [2020-10-14 08:52:16,722 INFO L226 Difference]: Without dead ends: 25250 [2020-10-14 08:52:16,747 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 08:52:16,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25250 states. [2020-10-14 08:52:17,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25250 to 24224. [2020-10-14 08:52:17,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24224 states. [2020-10-14 08:52:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24224 states to 24224 states and 36955 transitions. [2020-10-14 08:52:17,839 INFO L78 Accepts]: Start accepts. Automaton has 24224 states and 36955 transitions. Word has length 161 [2020-10-14 08:52:17,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:52:17,839 INFO L479 AbstractCegarLoop]: Abstraction has 24224 states and 36955 transitions. [2020-10-14 08:52:17,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:52:17,839 INFO L276 IsEmpty]: Start isEmpty. Operand 24224 states and 36955 transitions. [2020-10-14 08:52:17,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-14 08:52:17,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:52:17,921 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:52:17,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:52:17,921 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:52:17,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:52:17,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1139118629, now seen corresponding path program 1 times [2020-10-14 08:52:17,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:52:17,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351641675] [2020-10-14 08:52:17,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:52:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:17,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:18,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:18,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:18,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:18,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:18,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:19,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:22,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:22,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-14 08:52:22,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:52:22,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:52:22,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:22,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:22,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:52:22,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-14 08:52:22,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-14 08:52:22,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:23,151 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 08:52:23,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:52:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:23,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:23,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:23,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:52:23,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:23,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:52:23,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:23,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:23,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:52:23,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:52:23,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:52:23,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:23,188 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 08:52:23,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351641675] [2020-10-14 08:52:23,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:52:23,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:52:23,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79466153] [2020-10-14 08:52:23,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:52:23,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:52:23,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:52:23,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:52:23,191 INFO L87 Difference]: Start difference. First operand 24224 states and 36955 transitions. Second operand 4 states. [2020-10-14 08:52:23,376 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-14 08:52:26,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:52:26,502 INFO L93 Difference]: Finished difference Result 63044 states and 96005 transitions. [2020-10-14 08:52:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:52:26,502 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2020-10-14 08:52:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:52:26,681 INFO L225 Difference]: With dead ends: 63044 [2020-10-14 08:52:26,681 INFO L226 Difference]: Without dead ends: 45970 [2020-10-14 08:52:26,722 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 08:52:26,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45970 states. [2020-10-14 08:52:28,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45970 to 45968. [2020-10-14 08:52:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45968 states. [2020-10-14 08:52:28,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45968 states to 45968 states and 69747 transitions. [2020-10-14 08:52:28,525 INFO L78 Accepts]: Start accepts. Automaton has 45968 states and 69747 transitions. Word has length 163 [2020-10-14 08:52:28,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:52:28,525 INFO L479 AbstractCegarLoop]: Abstraction has 45968 states and 69747 transitions. [2020-10-14 08:52:28,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:52:28,526 INFO L276 IsEmpty]: Start isEmpty. Operand 45968 states and 69747 transitions. [2020-10-14 08:52:28,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-14 08:52:28,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:52:28,577 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:52:28,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:52:28,577 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:52:28,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:52:28,578 INFO L82 PathProgramCache]: Analyzing trace with hash -556229728, now seen corresponding path program 1 times [2020-10-14 08:52:28,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:52:28,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930527916] [2020-10-14 08:52:28,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:52:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:28,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:28,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:28,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:28,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:28,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:28,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:33,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:33,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-14 08:52:33,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:52:33,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 08:52:33,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:33,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:33,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:52:33,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-14 08:52:33,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 08:52:33,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:33,858 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 08:52:33,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:52:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:33,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:33,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:33,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:52:33,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:33,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 08:52:33,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:33,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:33,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:52:33,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:52:33,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:52:33,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:52:33,910 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 08:52:33,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930527916] [2020-10-14 08:52:33,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:52:33,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:52:33,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116627864] [2020-10-14 08:52:33,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:52:33,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:52:33,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:52:33,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:52:33,914 INFO L87 Difference]: Start difference. First operand 45968 states and 69747 transitions. Second operand 5 states. [2020-10-14 08:52:36,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:52:36,980 INFO L93 Difference]: Finished difference Result 89698 states and 135716 transitions. [2020-10-14 08:52:36,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:52:36,981 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 163 [2020-10-14 08:52:36,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:52:37,055 INFO L225 Difference]: With dead ends: 89698 [2020-10-14 08:52:37,056 INFO L226 Difference]: Without dead ends: 45968 [2020-10-14 08:52:37,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:52:37,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45968 states. [2020-10-14 08:52:38,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45968 to 45968. [2020-10-14 08:52:38,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45968 states. [2020-10-14 08:52:39,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45968 states to 45968 states and 69315 transitions. [2020-10-14 08:52:39,062 INFO L78 Accepts]: Start accepts. Automaton has 45968 states and 69315 transitions. Word has length 163 [2020-10-14 08:52:39,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:52:39,062 INFO L479 AbstractCegarLoop]: Abstraction has 45968 states and 69315 transitions. [2020-10-14 08:52:39,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:52:39,063 INFO L276 IsEmpty]: Start isEmpty. Operand 45968 states and 69315 transitions. [2020-10-14 08:52:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-14 08:52:39,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:52:39,118 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:52:39,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:52:39,118 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:52:39,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:52:39,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1836274525, now seen corresponding path program 1 times [2020-10-14 08:52:39,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:52:39,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942942581] [2020-10-14 08:52:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:52:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:39,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:39,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:39,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:39,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:39,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:39,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:39,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:44,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:44,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-14 08:52:44,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:52:44,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:52:44,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:44,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:44,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:52:44,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-14 08:52:44,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 08:52:44,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:44,333 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 08:52:44,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:52:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:44,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:44,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:44,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:52:44,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:44,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:52:44,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:44,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:44,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:52:44,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:52:44,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:52:44,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:44,369 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 08:52:44,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942942581] [2020-10-14 08:52:44,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:52:44,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:52:44,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743359208] [2020-10-14 08:52:44,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:52:44,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:52:44,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:52:44,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:52:44,371 INFO L87 Difference]: Start difference. First operand 45968 states and 69315 transitions. Second operand 4 states. [2020-10-14 08:52:44,566 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-14 08:52:49,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:52:49,086 INFO L93 Difference]: Finished difference Result 117468 states and 175025 transitions. [2020-10-14 08:52:49,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:52:49,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 165 [2020-10-14 08:52:49,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:52:49,215 INFO L225 Difference]: With dead ends: 117468 [2020-10-14 08:52:49,216 INFO L226 Difference]: Without dead ends: 83290 [2020-10-14 08:52:49,283 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 08:52:49,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83290 states. [2020-10-14 08:52:52,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83290 to 83288. [2020-10-14 08:52:52,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83288 states. [2020-10-14 08:52:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83288 states to 83288 states and 122671 transitions. [2020-10-14 08:52:53,075 INFO L78 Accepts]: Start accepts. Automaton has 83288 states and 122671 transitions. Word has length 165 [2020-10-14 08:52:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:52:53,075 INFO L479 AbstractCegarLoop]: Abstraction has 83288 states and 122671 transitions. [2020-10-14 08:52:53,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:52:53,075 INFO L276 IsEmpty]: Start isEmpty. Operand 83288 states and 122671 transitions. [2020-10-14 08:52:53,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-14 08:52:53,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:52:53,153 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:52:53,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:52:53,154 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:52:53,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:52:53,154 INFO L82 PathProgramCache]: Analyzing trace with hash 481257301, now seen corresponding path program 1 times [2020-10-14 08:52:53,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:52:53,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047566438] [2020-10-14 08:52:53,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:52:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:53,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:53,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:53,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:53,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:53,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:53,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:54,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:58,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:58,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-14 08:52:58,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:52:58,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-14 08:52:58,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:58,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:58,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:52:58,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-14 08:52:58,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 08:52:58,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:58,448 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 08:52:58,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:52:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:52:58,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:52:58,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:52:58,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:52:58,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:52:58,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:52:58,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:52:58,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:52:58,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:52:58,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:52:58,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:52:58,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:52:58,483 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 08:52:58,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047566438] [2020-10-14 08:52:58,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:52:58,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:52:58,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151361893] [2020-10-14 08:52:58,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:52:58,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:52:58,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:52:58,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:52:58,485 INFO L87 Difference]: Start difference. First operand 83288 states and 122671 transitions. Second operand 4 states. [2020-10-14 08:53:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:53:04,344 INFO L93 Difference]: Finished difference Result 154434 states and 227719 transitions. [2020-10-14 08:53:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:53:04,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2020-10-14 08:53:04,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:53:04,433 INFO L225 Difference]: With dead ends: 154434 [2020-10-14 08:53:04,433 INFO L226 Difference]: Without dead ends: 83242 [2020-10-14 08:53:04,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:53:04,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83242 states. [2020-10-14 08:53:07,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83242 to 83240. [2020-10-14 08:53:07,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83240 states. [2020-10-14 08:53:07,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83240 states to 83240 states and 121763 transitions. [2020-10-14 08:53:07,740 INFO L78 Accepts]: Start accepts. Automaton has 83240 states and 121763 transitions. Word has length 168 [2020-10-14 08:53:07,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:53:07,741 INFO L479 AbstractCegarLoop]: Abstraction has 83240 states and 121763 transitions. [2020-10-14 08:53:07,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:53:07,741 INFO L276 IsEmpty]: Start isEmpty. Operand 83240 states and 121763 transitions. [2020-10-14 08:53:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-14 08:53:07,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:53:07,823 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:53:07,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 08:53:07,824 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:53:07,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:53:07,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1407818922, now seen corresponding path program 1 times [2020-10-14 08:53:07,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:53:07,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652901613] [2020-10-14 08:53:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:53:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:07,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:07,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:07,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:07,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:07,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:08,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:12,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:12,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-14 08:53:12,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:53:12,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:53:12,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:12,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:12,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:53:12,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-14 08:53:12,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:53:12,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:53:13,036 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 08:53:13,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:53:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:13,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:13,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:13,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:53:13,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:53:13,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:53:13,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:13,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:13,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:53:13,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:53:13,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:53:13,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:53:13,066 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 08:53:13,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652901613] [2020-10-14 08:53:13,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:53:13,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:53:13,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091748218] [2020-10-14 08:53:13,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:53:13,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:53:13,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:53:13,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:53:13,069 INFO L87 Difference]: Start difference. First operand 83240 states and 121763 transitions. Second operand 4 states. [2020-10-14 08:53:19,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:53:19,497 INFO L93 Difference]: Finished difference Result 200272 states and 290941 transitions. [2020-10-14 08:53:19,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:53:19,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2020-10-14 08:53:19,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:53:19,630 INFO L225 Difference]: With dead ends: 200272 [2020-10-14 08:53:19,630 INFO L226 Difference]: Without dead ends: 119270 [2020-10-14 08:53:19,688 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 08:53:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119270 states. [2020-10-14 08:53:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119270 to 115104. [2020-10-14 08:53:26,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115104 states. [2020-10-14 08:53:26,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115104 states to 115104 states and 166427 transitions. [2020-10-14 08:53:26,325 INFO L78 Accepts]: Start accepts. Automaton has 115104 states and 166427 transitions. Word has length 168 [2020-10-14 08:53:26,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:53:26,326 INFO L479 AbstractCegarLoop]: Abstraction has 115104 states and 166427 transitions. [2020-10-14 08:53:26,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:53:26,326 INFO L276 IsEmpty]: Start isEmpty. Operand 115104 states and 166427 transitions. [2020-10-14 08:53:26,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-14 08:53:26,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:53:26,439 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:53:26,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 08:53:26,439 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:53:26,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:53:26,440 INFO L82 PathProgramCache]: Analyzing trace with hash 2127092857, now seen corresponding path program 1 times [2020-10-14 08:53:26,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:53:26,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17680433] [2020-10-14 08:53:26,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:53:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:26,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:26,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:26,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:26,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:26,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:29,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:30,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:31,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:31,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-14 08:53:31,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:53:31,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 08:53:31,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:31,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:31,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:53:31,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:53:31,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 08:53:31,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:53:31,702 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 08:53:31,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:53:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:31,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:31,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:31,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:53:31,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:53:31,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:53:31,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:31,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:31,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:53:31,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:53:31,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:53:31,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:53:31,739 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 08:53:31,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17680433] [2020-10-14 08:53:31,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:53:31,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 08:53:31,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494003944] [2020-10-14 08:53:31,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:53:31,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:53:31,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:53:31,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:53:31,741 INFO L87 Difference]: Start difference. First operand 115104 states and 166427 transitions. Second operand 6 states. [2020-10-14 08:53:42,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:53:42,938 INFO L93 Difference]: Finished difference Result 292710 states and 422981 transitions. [2020-10-14 08:53:42,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 08:53:42,944 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 169 [2020-10-14 08:53:42,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:53:43,183 INFO L225 Difference]: With dead ends: 292710 [2020-10-14 08:53:43,183 INFO L226 Difference]: Without dead ends: 185444 [2020-10-14 08:53:43,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:53:43,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185444 states. [2020-10-14 08:53:49,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185444 to 114436. [2020-10-14 08:53:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114436 states. [2020-10-14 08:53:49,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114436 states to 114436 states and 163747 transitions. [2020-10-14 08:53:49,234 INFO L78 Accepts]: Start accepts. Automaton has 114436 states and 163747 transitions. Word has length 169 [2020-10-14 08:53:49,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:53:49,234 INFO L479 AbstractCegarLoop]: Abstraction has 114436 states and 163747 transitions. [2020-10-14 08:53:49,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:53:49,234 INFO L276 IsEmpty]: Start isEmpty. Operand 114436 states and 163747 transitions. [2020-10-14 08:53:49,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-14 08:53:49,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:53:49,334 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:53:49,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 08:53:49,334 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:53:49,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:53:49,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1870865608, now seen corresponding path program 1 times [2020-10-14 08:53:49,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:53:49,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843397806] [2020-10-14 08:53:49,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:53:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:49,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:49,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:49,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:49,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:49,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:49,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:51,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:54,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:54,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-14 08:53:54,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:53:54,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:53:54,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:54,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:54,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:53:54,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 08:53:54,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 08:53:54,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:53:54,543 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 08:53:54,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:53:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:53:54,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:53:54,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:53:54,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:53:54,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:53:54,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:53:54,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:53:54,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:53:54,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:53:54,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:53:54,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:53:54,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:53:54,578 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 08:53:54,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843397806] [2020-10-14 08:53:54,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:53:54,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:53:54,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270606130] [2020-10-14 08:53:54,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:53:54,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:53:54,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:53:54,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:53:54,580 INFO L87 Difference]: Start difference. First operand 114436 states and 163747 transitions. Second operand 4 states. [2020-10-14 08:53:54,774 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-14 08:54:05,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:54:05,412 INFO L93 Difference]: Finished difference Result 316652 states and 453001 transitions. [2020-10-14 08:54:05,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:54:05,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2020-10-14 08:54:05,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:54:05,641 INFO L225 Difference]: With dead ends: 316652 [2020-10-14 08:54:05,642 INFO L226 Difference]: Without dead ends: 223970 [2020-10-14 08:54:05,713 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 08:54:05,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223970 states. [2020-10-14 08:54:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223970 to 223968. [2020-10-14 08:54:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223968 states. [2020-10-14 08:54:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223968 states to 223968 states and 318783 transitions. [2020-10-14 08:54:19,423 INFO L78 Accepts]: Start accepts. Automaton has 223968 states and 318783 transitions. Word has length 169 [2020-10-14 08:54:19,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:54:19,423 INFO L479 AbstractCegarLoop]: Abstraction has 223968 states and 318783 transitions. [2020-10-14 08:54:19,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:54:19,424 INFO L276 IsEmpty]: Start isEmpty. Operand 223968 states and 318783 transitions. [2020-10-14 08:54:19,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-14 08:54:19,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:54:19,680 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:54:19,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 08:54:19,680 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:54:19,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:54:19,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1595264040, now seen corresponding path program 1 times [2020-10-14 08:54:19,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:54:19,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790892653] [2020-10-14 08:54:19,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:54:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:19,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:19,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:19,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:19,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:19,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:22,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:22,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:24,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:24,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-14 08:54:24,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:54:24,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-14 08:54:24,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:24,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:24,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:54:24,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:54:24,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 08:54:24,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:27,411 WARN L193 SmtUtils]: Spent 2.65 s on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 08:54:27,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:54:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:54:27,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:54:27,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:54:27,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:54:27,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:54:27,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:54:27,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:54:27,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:54:27,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:54:27,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:54:27,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:54:27,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:54:27,441 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 08:54:27,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790892653] [2020-10-14 08:54:27,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:54:27,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 08:54:27,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60642851] [2020-10-14 08:54:27,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:54:27,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:54:27,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:54:27,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:54:27,443 INFO L87 Difference]: Start difference. First operand 223968 states and 318783 transitions. Second operand 6 states.