/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.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:39:57,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:39:57,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:39:57,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:39:57,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:39:57,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:39:57,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:39:57,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:39:57,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:39:57,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:39:57,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:39:57,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:39:57,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:39:57,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:39:57,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:39:57,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:39:57,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:39:57,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:39:57,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:39:57,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:39:57,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:39:57,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:39:57,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:39:57,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:39:57,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:39:57,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:39:57,398 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:39:57,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:39:57,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:39:57,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:39:57,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:39:57,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:39:57,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:39:57,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:39:57,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:39:57,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:39:57,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:39:57,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:39:57,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:39:57,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:39:57,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:39:57,412 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 08:39:57,447 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:39:57,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:39:57,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:39:57,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:39:57,450 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:39:57,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:39:57,450 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:39:57,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:39:57,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:39:57,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:39:57,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:39:57,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:39:57,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:39:57,453 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:39:57,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:39:57,453 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:39:57,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:39:57,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:39:57,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:39:57,454 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:39:57,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:39:57,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:39:57,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:39:57,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:39:57,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:39:57,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:39:57,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:39:57,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:39:57,456 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:39:57,456 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 08:39:57,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:39:57,790 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:39:57,793 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:39:57,795 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:39:57,795 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:39:57,796 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:39:57,851 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94fe89deb/362195262cbe4e55ba41fc4c689af21b/FLAGa38794f36 [2020-10-14 08:39:58,357 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:39:58,359 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:39:58,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94fe89deb/362195262cbe4e55ba41fc4c689af21b/FLAGa38794f36 [2020-10-14 08:39:58,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94fe89deb/362195262cbe4e55ba41fc4c689af21b [2020-10-14 08:39:58,714 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:39:58,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:39:58,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:39:58,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:39:58,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:39:58,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:39:58" (1/1) ... [2020-10-14 08:39:58,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3afd2ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:39:58, skipping insertion in model container [2020-10-14 08:39:58,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:39:58" (1/1) ... [2020-10-14 08:39:58,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:39:58,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:39:59,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:39:59,021 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:39:59,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:39:59,178 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:39:59,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:39:59 WrapperNode [2020-10-14 08:39:59,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:39:59,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:39:59,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:39:59,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:39:59,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:39:59" (1/1) ... [2020-10-14 08:39:59,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:39:59" (1/1) ... [2020-10-14 08:39:59,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:39:59" (1/1) ... [2020-10-14 08:39:59,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:39:59" (1/1) ... [2020-10-14 08:39:59,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:39:59" (1/1) ... [2020-10-14 08:39:59,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:39:59" (1/1) ... [2020-10-14 08:39:59,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:39:59" (1/1) ... [2020-10-14 08:39:59,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:39:59,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:39:59,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:39:59,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:39:59,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:39:59" (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 08:39:59,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:39:59,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:39:59,295 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:39:59,295 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:39:59,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:39:59,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:39:59,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:39:59,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 08:39:59,296 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:39:59,297 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:39:59,297 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:39:59,297 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:39:59,297 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:39:59,297 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:39:59,297 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:39:59,298 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:39:59,298 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:39:59,298 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:39:59,298 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:39:59,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:39:59,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:39:59,749 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:39:59,750 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:39:59,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:39:59 BoogieIcfgContainer [2020-10-14 08:39:59,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:39:59,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:39:59,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:39:59,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:39:59,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:39:58" (1/3) ... [2020-10-14 08:39:59,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7272a058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:39:59, skipping insertion in model container [2020-10-14 08:39:59,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:39:59" (2/3) ... [2020-10-14 08:39:59,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7272a058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:39:59, skipping insertion in model container [2020-10-14 08:39:59,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:39:59" (3/3) ... [2020-10-14 08:39:59,764 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:39:59,775 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:39:59,782 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:39:59,797 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:39:59,822 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:39:59,822 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:39:59,822 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:39:59,822 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:39:59,823 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:39:59,823 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:39:59,823 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:39:59,823 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:39:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states. [2020-10-14 08:39:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 08:39:59,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:39:59,852 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] [2020-10-14 08:39:59,852 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:39:59,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:39:59,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1464413452, now seen corresponding path program 1 times [2020-10-14 08:39:59,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:39:59,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470884385] [2020-10-14 08:39:59,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:40:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:00,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:00,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:00,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:01,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:02,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:02,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 08:40:02,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:40:02,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2210 [2020-10-14 08:40:02,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:02,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:02,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:40:02,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 08:40:02,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 08:40:02,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 13 [2020-10-14 08:40:02,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:40:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:02,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:02,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:02,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:40:02,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:40:02,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:40:02,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:02,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:02,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:40:02,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:40:02,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:40:02,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:02,559 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 08:40:02,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470884385] [2020-10-14 08:40:02,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:40:02,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:40:02,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9685932] [2020-10-14 08:40:02,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:40:02,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:40:02,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:40:02,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:40:02,589 INFO L87 Difference]: Start difference. First operand 69 states. Second operand 4 states. [2020-10-14 08:40:02,748 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-14 08:40:03,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:40:03,069 INFO L93 Difference]: Finished difference Result 153 states and 237 transitions. [2020-10-14 08:40:03,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:40:03,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-14 08:40:03,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:40:03,084 INFO L225 Difference]: With dead ends: 153 [2020-10-14 08:40:03,085 INFO L226 Difference]: Without dead ends: 99 [2020-10-14 08:40:03,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:40:03,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-14 08:40:03,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-14 08:40:03,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 08:40:03,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 140 transitions. [2020-10-14 08:40:03,143 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 140 transitions. Word has length 41 [2020-10-14 08:40:03,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:40:03,144 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 140 transitions. [2020-10-14 08:40:03,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:40:03,144 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 140 transitions. [2020-10-14 08:40:03,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 08:40:03,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:40:03,146 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] [2020-10-14 08:40:03,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:40:03,147 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:40:03,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:40:03,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1351977400, now seen corresponding path program 1 times [2020-10-14 08:40:03,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:40:03,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858017786] [2020-10-14 08:40:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:40:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:03,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:03,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:03,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:03,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:04,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:06,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:06,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 08:40:06,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 08:40:06,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3073 [2020-10-14 08:40:06,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:06,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:06,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:40:06,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:40:06,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 08:40:06,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:06,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:40:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:06,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:06,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:06,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:40:06,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:40:06,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:40:06,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:06,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:06,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:40:06,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:40:06,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:40:06,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:06,428 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 08:40:06,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858017786] [2020-10-14 08:40:06,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:40:06,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:40:06,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618810823] [2020-10-14 08:40:06,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:40:06,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:40:06,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:40:06,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:40:06,436 INFO L87 Difference]: Start difference. First operand 97 states and 140 transitions. Second operand 4 states. [2020-10-14 08:40:06,608 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-14 08:40:07,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:40:07,021 INFO L93 Difference]: Finished difference Result 229 states and 348 transitions. [2020-10-14 08:40:07,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:40:07,022 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-14 08:40:07,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:40:07,025 INFO L225 Difference]: With dead ends: 229 [2020-10-14 08:40:07,026 INFO L226 Difference]: Without dead ends: 155 [2020-10-14 08:40:07,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:40:07,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-14 08:40:07,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2020-10-14 08:40:07,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-14 08:40:07,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 228 transitions. [2020-10-14 08:40:07,066 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 228 transitions. Word has length 42 [2020-10-14 08:40:07,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:40:07,067 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 228 transitions. [2020-10-14 08:40:07,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:40:07,067 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 228 transitions. [2020-10-14 08:40:07,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 08:40:07,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:40:07,072 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] [2020-10-14 08:40:07,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:40:07,073 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:40:07,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:40:07,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1455185240, now seen corresponding path program 1 times [2020-10-14 08:40:07,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:40:07,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475285919] [2020-10-14 08:40:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:40:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:07,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:07,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:07,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:07,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:08,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:08,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 08:40:08,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:40:08,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1820 [2020-10-14 08:40:08,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:08,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:08,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:40:08,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:40:08,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 08:40:08,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:09,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:40:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:09,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:09,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:09,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:40:09,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:40:09,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:40:09,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:09,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:09,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:40:09,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:40:09,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:40:09,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:09,089 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 08:40:09,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475285919] [2020-10-14 08:40:09,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:40:09,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:40:09,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361756146] [2020-10-14 08:40:09,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:40:09,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:40:09,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:40:09,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:40:09,092 INFO L87 Difference]: Start difference. First operand 153 states and 228 transitions. Second operand 6 states. [2020-10-14 08:40:09,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:40:09,520 INFO L93 Difference]: Finished difference Result 411 states and 634 transitions. [2020-10-14 08:40:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:40:09,520 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-14 08:40:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:40:09,523 INFO L225 Difference]: With dead ends: 411 [2020-10-14 08:40:09,523 INFO L226 Difference]: Without dead ends: 281 [2020-10-14 08:40:09,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 08:40:09,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-14 08:40:09,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 279. [2020-10-14 08:40:09,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-14 08:40:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 426 transitions. [2020-10-14 08:40:09,552 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 426 transitions. Word has length 43 [2020-10-14 08:40:09,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:40:09,553 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 426 transitions. [2020-10-14 08:40:09,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:40:09,553 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 426 transitions. [2020-10-14 08:40:09,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 08:40:09,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:40:09,554 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] [2020-10-14 08:40:09,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:40:09,555 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:40:09,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:40:09,555 INFO L82 PathProgramCache]: Analyzing trace with hash -181317235, now seen corresponding path program 1 times [2020-10-14 08:40:09,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:40:09,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938194040] [2020-10-14 08:40:09,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:40:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:09,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:09,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:09,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:09,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 08:40:09,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 08:40:09,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-14 08:40:09,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:09,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:09,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:40:09,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:40:09,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 08:40:09,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:10,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:40:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:10,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:10,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:10,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:40:10,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:40:10,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:40:10,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:10,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:10,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:40:10,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:40:10,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:40:10,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:10,025 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 08:40:10,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938194040] [2020-10-14 08:40:10,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:40:10,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 08:40:10,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723538577] [2020-10-14 08:40:10,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:40:10,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:40:10,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:40:10,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:40:10,028 INFO L87 Difference]: Start difference. First operand 279 states and 426 transitions. Second operand 6 states. [2020-10-14 08:40:10,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:40:10,555 INFO L93 Difference]: Finished difference Result 1815 states and 2844 transitions. [2020-10-14 08:40:10,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 08:40:10,556 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-14 08:40:10,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:40:10,564 INFO L225 Difference]: With dead ends: 1815 [2020-10-14 08:40:10,565 INFO L226 Difference]: Without dead ends: 1559 [2020-10-14 08:40:10,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:40:10,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2020-10-14 08:40:10,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 533. [2020-10-14 08:40:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2020-10-14 08:40:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 812 transitions. [2020-10-14 08:40:10,629 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 812 transitions. Word has length 43 [2020-10-14 08:40:10,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:40:10,630 INFO L479 AbstractCegarLoop]: Abstraction has 533 states and 812 transitions. [2020-10-14 08:40:10,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:40:10,630 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 812 transitions. [2020-10-14 08:40:10,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 08:40:10,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:40:10,632 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] [2020-10-14 08:40:10,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:40:10,632 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:40:10,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:40:10,633 INFO L82 PathProgramCache]: Analyzing trace with hash 974651879, now seen corresponding path program 1 times [2020-10-14 08:40:10,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:40:10,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708646928] [2020-10-14 08:40:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:40:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:10,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:10,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:11,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:11,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 08:40:11,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 08:40:11,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-14 08:40:11,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:11,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:11,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:40:11,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:40:11,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 08:40:11,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:11,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:40:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:11,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:11,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:11,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:40:11,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:40:11,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:40:11,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:11,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:11,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:40:11,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:40:11,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:40:11,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:11,191 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 08:40:11,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708646928] [2020-10-14 08:40:11,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:40:11,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 08:40:11,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026219645] [2020-10-14 08:40:11,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:40:11,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:40:11,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:40:11,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:40:11,193 INFO L87 Difference]: Start difference. First operand 533 states and 812 transitions. Second operand 6 states. [2020-10-14 08:40:11,336 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-14 08:40:11,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:40:11,799 INFO L93 Difference]: Finished difference Result 2069 states and 3182 transitions. [2020-10-14 08:40:11,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 08:40:11,800 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-14 08:40:11,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:40:11,810 INFO L225 Difference]: With dead ends: 2069 [2020-10-14 08:40:11,810 INFO L226 Difference]: Without dead ends: 1559 [2020-10-14 08:40:11,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:40:11,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2020-10-14 08:40:11,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 533. [2020-10-14 08:40:11,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2020-10-14 08:40:11,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 804 transitions. [2020-10-14 08:40:11,875 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 804 transitions. Word has length 45 [2020-10-14 08:40:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:40:11,875 INFO L479 AbstractCegarLoop]: Abstraction has 533 states and 804 transitions. [2020-10-14 08:40:11,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:40:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 804 transitions. [2020-10-14 08:40:11,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 08:40:11,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:40:11,877 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] [2020-10-14 08:40:11,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:40:11,877 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:40:11,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:40:11,878 INFO L82 PathProgramCache]: Analyzing trace with hash 954602536, now seen corresponding path program 1 times [2020-10-14 08:40:11,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:40:11,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451603209] [2020-10-14 08:40:11,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:40:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:11,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:11,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:11,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:12,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:12,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:12,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 08:40:12,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:40:12,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-10-14 08:40:12,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:12,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:12,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:40:12,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 08:40:12,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 08:40:12,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:12,537 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-14 08:40:12,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:40:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:12,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:12,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:12,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:40:12,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:40:12,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:40:12,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:12,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:12,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:40:12,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:40:12,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:40:12,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:12,565 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 08:40:12,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451603209] [2020-10-14 08:40:12,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:40:12,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:40:12,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906350263] [2020-10-14 08:40:12,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:40:12,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:40:12,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:40:12,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:40:12,567 INFO L87 Difference]: Start difference. First operand 533 states and 804 transitions. Second operand 4 states. [2020-10-14 08:40:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:40:13,114 INFO L93 Difference]: Finished difference Result 1465 states and 2214 transitions. [2020-10-14 08:40:13,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:40:13,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-14 08:40:13,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:40:13,120 INFO L225 Difference]: With dead ends: 1465 [2020-10-14 08:40:13,120 INFO L226 Difference]: Without dead ends: 955 [2020-10-14 08:40:13,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:40:13,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2020-10-14 08:40:13,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 937. [2020-10-14 08:40:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 937 states. [2020-10-14 08:40:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1376 transitions. [2020-10-14 08:40:13,272 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1376 transitions. Word has length 45 [2020-10-14 08:40:13,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:40:13,273 INFO L479 AbstractCegarLoop]: Abstraction has 937 states and 1376 transitions. [2020-10-14 08:40:13,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:40:13,273 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1376 transitions. [2020-10-14 08:40:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 08:40:13,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:40:13,274 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] [2020-10-14 08:40:13,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:40:13,275 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:40:13,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:40:13,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1534502514, now seen corresponding path program 1 times [2020-10-14 08:40:13,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:40:13,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551878966] [2020-10-14 08:40:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:40:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:13,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:13,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:13,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:13,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:13,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:13,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 08:40:13,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:40:13,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-14 08:40:13,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:13,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:13,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:40:13,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 08:40:13,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 08:40:13,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:40:13,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:40:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:13,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:13,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:13,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:40:13,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:40:13,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:40:13,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:13,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:13,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:40:13,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:40:13,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:40:13,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:13,786 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 08:40:13,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551878966] [2020-10-14 08:40:13,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:40:13,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:40:13,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408747088] [2020-10-14 08:40:13,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:40:13,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:40:13,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:40:13,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:40:13,789 INFO L87 Difference]: Start difference. First operand 937 states and 1376 transitions. Second operand 4 states. [2020-10-14 08:40:14,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:40:14,284 INFO L93 Difference]: Finished difference Result 1800 states and 2686 transitions. [2020-10-14 08:40:14,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:40:14,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-14 08:40:14,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:40:14,292 INFO L225 Difference]: With dead ends: 1800 [2020-10-14 08:40:14,292 INFO L226 Difference]: Without dead ends: 1289 [2020-10-14 08:40:14,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:40:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2020-10-14 08:40:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1287. [2020-10-14 08:40:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1287 states. [2020-10-14 08:40:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1886 transitions. [2020-10-14 08:40:14,417 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1886 transitions. Word has length 46 [2020-10-14 08:40:14,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:40:14,417 INFO L479 AbstractCegarLoop]: Abstraction has 1287 states and 1886 transitions. [2020-10-14 08:40:14,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:40:14,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1886 transitions. [2020-10-14 08:40:14,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 08:40:14,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:40:14,422 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] [2020-10-14 08:40:14,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:40:14,422 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:40:14,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:40:14,423 INFO L82 PathProgramCache]: Analyzing trace with hash 147527760, now seen corresponding path program 1 times [2020-10-14 08:40:14,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:40:14,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967930074] [2020-10-14 08:40:14,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:40:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:14,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:14,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:14,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:14,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 08:40:14,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 08:40:14,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-14 08:40:14,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:14,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:14,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:40:14,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:40:14,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 08:40:14,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:14,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:40:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:14,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:14,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:14,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:40:14,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:40:14,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:40:14,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:14,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:14,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:40:14,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:40:14,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:40:14,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:40:14,828 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 08:40:14,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967930074] [2020-10-14 08:40:14,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:40:14,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:40:14,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690212315] [2020-10-14 08:40:14,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:40:14,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:40:14,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:40:14,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:40:14,831 INFO L87 Difference]: Start difference. First operand 1287 states and 1886 transitions. Second operand 6 states. [2020-10-14 08:40:14,980 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-14 08:40:15,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:40:15,532 INFO L93 Difference]: Finished difference Result 3391 states and 5004 transitions. [2020-10-14 08:40:15,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:40:15,533 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-14 08:40:15,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:40:15,544 INFO L225 Difference]: With dead ends: 3391 [2020-10-14 08:40:15,544 INFO L226 Difference]: Without dead ends: 2129 [2020-10-14 08:40:15,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:40:15,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2020-10-14 08:40:15,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 2127. [2020-10-14 08:40:15,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2127 states. [2020-10-14 08:40:15,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 3110 transitions. [2020-10-14 08:40:15,769 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 3110 transitions. Word has length 46 [2020-10-14 08:40:15,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:40:15,769 INFO L479 AbstractCegarLoop]: Abstraction has 2127 states and 3110 transitions. [2020-10-14 08:40:15,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:40:15,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 3110 transitions. [2020-10-14 08:40:15,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 08:40:15,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:40:15,771 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] [2020-10-14 08:40:15,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:40:15,772 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:40:15,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:40:15,772 INFO L82 PathProgramCache]: Analyzing trace with hash 275613067, now seen corresponding path program 1 times [2020-10-14 08:40:15,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:40:15,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803771940] [2020-10-14 08:40:15,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:40:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:15,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:15,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:15,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 08:40:15,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:40:15,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-14 08:40:15,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:15,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:15,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:40:15,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:40:15,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 08:40:15,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:16,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:40:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:16,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:16,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:16,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:40:16,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:40:16,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:40:16,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:16,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:16,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:40:16,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:40:16,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:40:16,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:16,090 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 08:40:16,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803771940] [2020-10-14 08:40:16,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:40:16,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:40:16,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616478323] [2020-10-14 08:40:16,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:40:16,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:40:16,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:40:16,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:40:16,093 INFO L87 Difference]: Start difference. First operand 2127 states and 3110 transitions. Second operand 5 states. [2020-10-14 08:40:16,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:40:16,786 INFO L93 Difference]: Finished difference Result 4048 states and 5888 transitions. [2020-10-14 08:40:16,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:40:16,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-14 08:40:16,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:40:16,808 INFO L225 Difference]: With dead ends: 4048 [2020-10-14 08:40:16,808 INFO L226 Difference]: Without dead ends: 4046 [2020-10-14 08:40:16,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:40:16,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2020-10-14 08:40:17,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 2255. [2020-10-14 08:40:17,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2255 states. [2020-10-14 08:40:17,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 3230 transitions. [2020-10-14 08:40:17,128 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 3230 transitions. Word has length 46 [2020-10-14 08:40:17,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:40:17,130 INFO L479 AbstractCegarLoop]: Abstraction has 2255 states and 3230 transitions. [2020-10-14 08:40:17,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:40:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 3230 transitions. [2020-10-14 08:40:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 08:40:17,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:40:17,132 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:40:17,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:40:17,133 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:40:17,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:40:17,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1077276216, now seen corresponding path program 1 times [2020-10-14 08:40:17,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:40:17,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741837794] [2020-10-14 08:40:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:40:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:17,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:17,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:17,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:17,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:17,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:17,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:17,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:18,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:18,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:18,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:18,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:18,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:21,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:21,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:22,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:22,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 08:40:22,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 08:40:22,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 08:40:22,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:22,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:22,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:40:22,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 08:40:22,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 08:40:22,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:22,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:40:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:22,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:22,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:22,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:40:22,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:40:22,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:40:22,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:22,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:22,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:40:22,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:40:22,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:40:22,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:40:22,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741837794] [2020-10-14 08:40:22,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:40:22,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:40:22,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830718805] [2020-10-14 08:40:22,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:40:22,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:40:22,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:40:22,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:40:22,306 INFO L87 Difference]: Start difference. First operand 2255 states and 3230 transitions. Second operand 4 states. [2020-10-14 08:40:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:40:22,739 INFO L93 Difference]: Finished difference Result 4109 states and 5919 transitions. [2020-10-14 08:40:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:40:22,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-14 08:40:22,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:40:22,750 INFO L225 Difference]: With dead ends: 4109 [2020-10-14 08:40:22,750 INFO L226 Difference]: Without dead ends: 1879 [2020-10-14 08:40:22,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:40:22,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2020-10-14 08:40:23,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1877. [2020-10-14 08:40:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1877 states. [2020-10-14 08:40:23,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 2680 transitions. [2020-10-14 08:40:23,030 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 2680 transitions. Word has length 65 [2020-10-14 08:40:23,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:40:23,030 INFO L479 AbstractCegarLoop]: Abstraction has 1877 states and 2680 transitions. [2020-10-14 08:40:23,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:40:23,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 2680 transitions. [2020-10-14 08:40:23,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 08:40:23,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:40:23,033 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:40:23,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:40:23,034 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:40:23,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:40:23,034 INFO L82 PathProgramCache]: Analyzing trace with hash -491820671, now seen corresponding path program 1 times [2020-10-14 08:40:23,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:40:23,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749254025] [2020-10-14 08:40:23,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:40:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:23,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:23,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:23,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:23,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:23,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:28,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:28,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 08:40:28,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 08:40:28,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 08:40:28,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:28,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:28,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:40:28,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:40:28,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 08:40:28,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:28,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:40:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:28,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:28,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:28,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:40:28,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:40:28,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:40:28,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:28,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:28,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:40:28,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:40:28,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:40:28,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 08:40:28,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749254025] [2020-10-14 08:40:28,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:40:28,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 08:40:28,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110083930] [2020-10-14 08:40:28,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:40:28,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:40:28,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:40:28,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:40:28,212 INFO L87 Difference]: Start difference. First operand 1877 states and 2680 transitions. Second operand 6 states. [2020-10-14 08:40:29,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:40:29,259 INFO L93 Difference]: Finished difference Result 8799 states and 12637 transitions. [2020-10-14 08:40:29,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 08:40:29,260 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-14 08:40:29,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:40:29,293 INFO L225 Difference]: With dead ends: 8799 [2020-10-14 08:40:29,293 INFO L226 Difference]: Without dead ends: 6973 [2020-10-14 08:40:29,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:40:29,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6973 states. [2020-10-14 08:40:29,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6973 to 4421. [2020-10-14 08:40:29,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4421 states. [2020-10-14 08:40:29,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4421 states to 4421 states and 6280 transitions. [2020-10-14 08:40:29,791 INFO L78 Accepts]: Start accepts. Automaton has 4421 states and 6280 transitions. Word has length 66 [2020-10-14 08:40:29,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:40:29,791 INFO L479 AbstractCegarLoop]: Abstraction has 4421 states and 6280 transitions. [2020-10-14 08:40:29,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:40:29,792 INFO L276 IsEmpty]: Start isEmpty. Operand 4421 states and 6280 transitions. [2020-10-14 08:40:29,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 08:40:29,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:40:29,793 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:40:29,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 08:40:29,794 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:40:29,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:40:29,794 INFO L82 PathProgramCache]: Analyzing trace with hash -468075449, now seen corresponding path program 1 times [2020-10-14 08:40:29,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:40:29,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766926806] [2020-10-14 08:40:29,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:40:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:29,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:29,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:29,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:29,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:30,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:30,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:31,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:31,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:32,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:32,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:34,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:34,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 08:40:34,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 08:40:34,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 08:40:34,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:34,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:34,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:40:34,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:40:34,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 08:40:34,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:40:34,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:40:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:34,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:34,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:34,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:40:34,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:40:34,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:40:34,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:34,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:34,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:40:34,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:40:34,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:40:34,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:40:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 08:40:34,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766926806] [2020-10-14 08:40:34,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:40:34,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 08:40:34,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313353475] [2020-10-14 08:40:34,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:40:34,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:40:34,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:40:34,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:40:34,946 INFO L87 Difference]: Start difference. First operand 4421 states and 6280 transitions. Second operand 6 states. [2020-10-14 08:40:35,107 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-14 08:40:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:40:36,431 INFO L93 Difference]: Finished difference Result 12443 states and 17649 transitions. [2020-10-14 08:40:36,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 08:40:36,431 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-14 08:40:36,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:40:36,487 INFO L225 Difference]: With dead ends: 12443 [2020-10-14 08:40:36,488 INFO L226 Difference]: Without dead ends: 9897 [2020-10-14 08:40:36,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:40:36,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9897 states. [2020-10-14 08:40:37,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9897 to 7157. [2020-10-14 08:40:37,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7157 states. [2020-10-14 08:40:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7157 states to 7157 states and 10136 transitions. [2020-10-14 08:40:37,214 INFO L78 Accepts]: Start accepts. Automaton has 7157 states and 10136 transitions. Word has length 66 [2020-10-14 08:40:37,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:40:37,214 INFO L479 AbstractCegarLoop]: Abstraction has 7157 states and 10136 transitions. [2020-10-14 08:40:37,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:40:37,214 INFO L276 IsEmpty]: Start isEmpty. Operand 7157 states and 10136 transitions. [2020-10-14 08:40:37,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 08:40:37,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:40:37,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:40:37,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 08:40:37,217 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:40:37,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:40:37,217 INFO L82 PathProgramCache]: Analyzing trace with hash -864346565, now seen corresponding path program 1 times [2020-10-14 08:40:37,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:40:37,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492444219] [2020-10-14 08:40:37,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:40:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:37,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:37,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:37,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:37,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:37,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:37,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:37,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:38,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:38,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:38,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:38,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:38,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:42,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:42,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 08:40:42,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 08:40:42,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:40:42,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:42,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:42,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:40:42,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:40:42,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 08:40:42,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:40:42,386 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-14 08:40:42,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:40:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:42,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:42,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:42,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:40:42,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:40:42,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:40:42,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:42,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:42,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:40:42,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:40:42,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:40:42,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:40:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:40:42,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492444219] [2020-10-14 08:40:42,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:40:42,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 08:40:42,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785116362] [2020-10-14 08:40:42,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:40:42,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:40:42,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:40:42,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:40:42,425 INFO L87 Difference]: Start difference. First operand 7157 states and 10136 transitions. Second operand 6 states. [2020-10-14 08:40:42,591 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-14 08:40:43,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:40:43,874 INFO L93 Difference]: Finished difference Result 12867 states and 18323 transitions. [2020-10-14 08:40:43,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:40:43,875 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-14 08:40:43,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:40:43,908 INFO L225 Difference]: With dead ends: 12867 [2020-10-14 08:40:43,909 INFO L226 Difference]: Without dead ends: 10321 [2020-10-14 08:40:43,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:40:43,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10321 states. [2020-10-14 08:40:44,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10321 to 9893. [2020-10-14 08:40:44,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9893 states. [2020-10-14 08:40:45,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9893 states to 9893 states and 14120 transitions. [2020-10-14 08:40:45,010 INFO L78 Accepts]: Start accepts. Automaton has 9893 states and 14120 transitions. Word has length 66 [2020-10-14 08:40:45,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:40:45,010 INFO L479 AbstractCegarLoop]: Abstraction has 9893 states and 14120 transitions. [2020-10-14 08:40:45,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:40:45,010 INFO L276 IsEmpty]: Start isEmpty. Operand 9893 states and 14120 transitions. [2020-10-14 08:40:45,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:40:45,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:40:45,012 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:40:45,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 08:40:45,013 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:40:45,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:40:45,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1845729949, now seen corresponding path program 1 times [2020-10-14 08:40:45,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:40:45,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504730904] [2020-10-14 08:40:45,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:40:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:45,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:45,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:45,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:45,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:45,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:45,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:45,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:45,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:47,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:50,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:50,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:40:50,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 08:40:50,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:40:50,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:50,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:50,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 08:40:50,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:40:50,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 08:40:50,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:40:50,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:40:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:50,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:50,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:40:50,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:40:50,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:40:50,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 08:40:50,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:40:50,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:40:50,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:40:50,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:40:50,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:40:50,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:40:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:40:50,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504730904] [2020-10-14 08:40:50,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:40:50,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 08:40:50,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213264353] [2020-10-14 08:40:50,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 08:40:50,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:40:50,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 08:40:50,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-14 08:40:50,312 INFO L87 Difference]: Start difference. First operand 9893 states and 14120 transitions. Second operand 11 states. [2020-10-14 08:40:50,462 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-14 08:40:55,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:40:55,733 INFO L93 Difference]: Finished difference Result 58030 states and 81477 transitions. [2020-10-14 08:40:55,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 08:40:55,733 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-14 08:40:55,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:40:55,842 INFO L225 Difference]: With dead ends: 58030 [2020-10-14 08:40:55,843 INFO L226 Difference]: Without dead ends: 48170 [2020-10-14 08:40:55,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 08:40:55,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48170 states. [2020-10-14 08:40:58,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48170 to 24036. [2020-10-14 08:40:58,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24036 states. [2020-10-14 08:40:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 33851 transitions. [2020-10-14 08:40:58,326 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 33851 transitions. Word has length 67 [2020-10-14 08:40:58,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:40:58,326 INFO L479 AbstractCegarLoop]: Abstraction has 24036 states and 33851 transitions. [2020-10-14 08:40:58,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 08:40:58,326 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 33851 transitions. [2020-10-14 08:40:58,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 08:40:58,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:40:58,329 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:40:58,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 08:40:58,329 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:40:58,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:40:58,330 INFO L82 PathProgramCache]: Analyzing trace with hash 999170482, now seen corresponding path program 1 times [2020-10-14 08:40:58,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:40:58,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990554547] [2020-10-14 08:40:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:40:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:40:58,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:58,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:58,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:59,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:59,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:40:59,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:00,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:00,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:00,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:00,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:00,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:01,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:01,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:01,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:01,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:01,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:01,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:02,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:03,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:41:03,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 08:41:03,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 08:41:03,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:41:03,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:41:03,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:41:03,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 08:41:03,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:41:03,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 08:41:03,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:41:03,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:41:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:41:03,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:03,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:41:03,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:41:03,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:41:03,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:41:03,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:41:03,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:41:03,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:41:03,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:41:03,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:41:03,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:41:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:41:03,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990554547] [2020-10-14 08:41:03,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:41:03,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 08:41:03,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530310782] [2020-10-14 08:41:03,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 08:41:03,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:41:03,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 08:41:03,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 08:41:03,646 INFO L87 Difference]: Start difference. First operand 24036 states and 33851 transitions. Second operand 11 states. [2020-10-14 08:41:19,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:41:19,002 INFO L93 Difference]: Finished difference Result 153018 states and 212220 transitions. [2020-10-14 08:41:19,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 08:41:19,003 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-10-14 08:41:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:41:19,294 INFO L225 Difference]: With dead ends: 153018 [2020-10-14 08:41:19,294 INFO L226 Difference]: Without dead ends: 126112 [2020-10-14 08:41:19,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=564, Invalid=2298, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 08:41:19,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126112 states. [2020-10-14 08:41:25,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126112 to 56271. [2020-10-14 08:41:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56271 states. [2020-10-14 08:41:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56271 states to 56271 states and 78194 transitions. [2020-10-14 08:41:25,685 INFO L78 Accepts]: Start accepts. Automaton has 56271 states and 78194 transitions. Word has length 68 [2020-10-14 08:41:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:41:25,685 INFO L479 AbstractCegarLoop]: Abstraction has 56271 states and 78194 transitions. [2020-10-14 08:41:25,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 08:41:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 56271 states and 78194 transitions. [2020-10-14 08:41:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 08:41:25,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:41:25,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:41:25,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 08:41:25,689 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:41:25,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:41:25,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1722878882, now seen corresponding path program 1 times [2020-10-14 08:41:25,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:41:25,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232688464] [2020-10-14 08:41:25,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:41:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:41:25,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:25,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:25,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:25,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:25,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:26,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:26,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:27,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:27,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:30,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:41:30,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 08:41:30,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 08:41:30,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4963 [2020-10-14 08:41:30,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:41:30,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:41:30,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:41:30,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 08:41:30,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 08:41:30,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:41:30,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:41:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:41:30,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:30,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:41:30,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:41:30,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:41:30,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:41:30,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:41:30,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:41:30,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:41:30,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:41:30,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:41:30,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:41:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 08:41:30,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232688464] [2020-10-14 08:41:30,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:41:30,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 08:41:30,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060158060] [2020-10-14 08:41:30,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:41:30,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:41:30,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:41:30,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:41:30,855 INFO L87 Difference]: Start difference. First operand 56271 states and 78194 transitions. Second operand 5 states. [2020-10-14 08:41:31,012 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-14 08:41:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:41:36,943 INFO L93 Difference]: Finished difference Result 118493 states and 164218 transitions. [2020-10-14 08:41:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:41:36,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-14 08:41:36,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:41:37,030 INFO L225 Difference]: With dead ends: 118493 [2020-10-14 08:41:37,030 INFO L226 Difference]: Without dead ends: 62305 [2020-10-14 08:41:37,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:41:37,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62305 states. [2020-10-14 08:41:44,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62305 to 61970. [2020-10-14 08:41:44,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61970 states. [2020-10-14 08:41:44,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61970 states to 61970 states and 84929 transitions. [2020-10-14 08:41:44,528 INFO L78 Accepts]: Start accepts. Automaton has 61970 states and 84929 transitions. Word has length 68 [2020-10-14 08:41:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:41:44,529 INFO L479 AbstractCegarLoop]: Abstraction has 61970 states and 84929 transitions. [2020-10-14 08:41:44,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:41:44,529 INFO L276 IsEmpty]: Start isEmpty. Operand 61970 states and 84929 transitions. [2020-10-14 08:41:44,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 08:41:44,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:41:44,531 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:41:44,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 08:41:44,531 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:41:44,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:41:44,531 INFO L82 PathProgramCache]: Analyzing trace with hash -515928084, now seen corresponding path program 1 times [2020-10-14 08:41:44,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:41:44,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612295863] [2020-10-14 08:41:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:41:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:41:44,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:44,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:44,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:44,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:44,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:44,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:45,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:45,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:45,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:45,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:45,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:45,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:46,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:46,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:47,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:47,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:47,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:48,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:49,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:41:49,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 08:41:49,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 08:41:49,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 08:41:49,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:41:49,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:41:49,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 08:41:49,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:41:49,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 08:41:49,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:41:49,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:41:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:41:49,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:41:49,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:41:49,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:41:49,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:41:49,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:41:49,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:41:49,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:41:49,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:41:49,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:41:49,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:41:49,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:41:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:41:49,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612295863] [2020-10-14 08:41:49,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:41:49,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 08:41:49,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119416977] [2020-10-14 08:41:49,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 08:41:49,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:41:49,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 08:41:49,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 08:41:49,794 INFO L87 Difference]: Start difference. First operand 61970 states and 84929 transitions. Second operand 11 states. [2020-10-14 08:41:49,944 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-14 08:42:15,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:42:15,339 INFO L93 Difference]: Finished difference Result 282521 states and 386277 transitions. [2020-10-14 08:42:15,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 08:42:15,340 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-10-14 08:42:15,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:42:15,626 INFO L225 Difference]: With dead ends: 282521 [2020-10-14 08:42:15,626 INFO L226 Difference]: Without dead ends: 224992 [2020-10-14 08:42:15,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 08:42:15,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224992 states. [2020-10-14 08:42:29,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224992 to 104403. [2020-10-14 08:42:29,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104403 states. [2020-10-14 08:42:29,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104403 states to 104403 states and 142571 transitions. [2020-10-14 08:42:29,483 INFO L78 Accepts]: Start accepts. Automaton has 104403 states and 142571 transitions. Word has length 68 [2020-10-14 08:42:29,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:42:29,483 INFO L479 AbstractCegarLoop]: Abstraction has 104403 states and 142571 transitions. [2020-10-14 08:42:29,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 08:42:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand 104403 states and 142571 transitions. [2020-10-14 08:42:29,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 08:42:29,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:42:29,486 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:42:29,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 08:42:29,486 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:42:29,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:42:29,486 INFO L82 PathProgramCache]: Analyzing trace with hash -30009588, now seen corresponding path program 1 times [2020-10-14 08:42:29,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:42:29,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576530337] [2020-10-14 08:42:29,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:42:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:42:29,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:29,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:29,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:29,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:29,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:30,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:42:30,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 08:42:30,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 08:42:30,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1383 [2020-10-14 08:42:30,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:42:30,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:42:30,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:42:30,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-14 08:42:30,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 08:42:30,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:42:30,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:42:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:42:30,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:30,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:42:30,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:42:30,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:42:30,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 08:42:30,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:42:30,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:42:30,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:42:30,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:42:30,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:42:30,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:42:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 08:42:30,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576530337] [2020-10-14 08:42:30,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:42:30,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:42:30,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726710769] [2020-10-14 08:42:30,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:42:30,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:42:30,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:42:30,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:42:30,989 INFO L87 Difference]: Start difference. First operand 104403 states and 142571 transitions. Second operand 4 states. [2020-10-14 08:42:41,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:42:41,552 INFO L93 Difference]: Finished difference Result 202891 states and 277829 transitions. [2020-10-14 08:42:41,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:42:41,553 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-14 08:42:41,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:42:41,674 INFO L225 Difference]: With dead ends: 202891 [2020-10-14 08:42:41,675 INFO L226 Difference]: Without dead ends: 99103 [2020-10-14 08:42:41,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:42:41,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99103 states. [2020-10-14 08:42:54,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99103 to 99103. [2020-10-14 08:42:54,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99103 states. [2020-10-14 08:42:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99103 states to 99103 states and 135023 transitions. [2020-10-14 08:42:54,854 INFO L78 Accepts]: Start accepts. Automaton has 99103 states and 135023 transitions. Word has length 69 [2020-10-14 08:42:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:42:54,854 INFO L479 AbstractCegarLoop]: Abstraction has 99103 states and 135023 transitions. [2020-10-14 08:42:54,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:42:54,854 INFO L276 IsEmpty]: Start isEmpty. Operand 99103 states and 135023 transitions. [2020-10-14 08:42:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 08:42:54,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:42:54,856 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:42:54,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 08:42:54,856 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:42:54,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:42:54,856 INFO L82 PathProgramCache]: Analyzing trace with hash -687475446, now seen corresponding path program 1 times [2020-10-14 08:42:54,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:42:54,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648744915] [2020-10-14 08:42:54,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:42:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:42:54,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:54,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:54,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:55,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:55,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:57,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:42:57,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 08:42:57,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 08:42:57,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2204 [2020-10-14 08:42:57,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:42:57,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:42:57,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 08:42:57,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:42:57,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 08:42:57,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:42:57,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:42:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:42:57,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:57,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:42:57,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:42:57,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:42:57,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:42:57,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:42:57,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:42:57,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:42:57,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:42:57,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:42:57,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:42:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:42:57,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648744915] [2020-10-14 08:42:57,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:42:57,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 08:42:57,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265845562] [2020-10-14 08:42:57,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 08:42:57,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:42:57,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 08:42:57,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:42:57,370 INFO L87 Difference]: Start difference. First operand 99103 states and 135023 transitions. Second operand 10 states. [2020-10-14 08:43:21,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:43:21,552 INFO L93 Difference]: Finished difference Result 234550 states and 318731 transitions. [2020-10-14 08:43:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 08:43:21,553 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-14 08:43:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:43:21,748 INFO L225 Difference]: With dead ends: 234550 [2020-10-14 08:43:21,748 INFO L226 Difference]: Without dead ends: 163053 [2020-10-14 08:43:21,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2020-10-14 08:43:21,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163053 states. [2020-10-14 08:43:34,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163053 to 100025. [2020-10-14 08:43:34,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100025 states. [2020-10-14 08:43:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100025 states to 100025 states and 136407 transitions. [2020-10-14 08:43:34,164 INFO L78 Accepts]: Start accepts. Automaton has 100025 states and 136407 transitions. Word has length 69 [2020-10-14 08:43:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:43:34,164 INFO L479 AbstractCegarLoop]: Abstraction has 100025 states and 136407 transitions. [2020-10-14 08:43:34,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 08:43:34,164 INFO L276 IsEmpty]: Start isEmpty. Operand 100025 states and 136407 transitions. [2020-10-14 08:43:34,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 08:43:34,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:43:34,166 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:43:34,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 08:43:34,166 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:43:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:43:34,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1862259214, now seen corresponding path program 1 times [2020-10-14 08:43:34,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:43:34,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609966294] [2020-10-14 08:43:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:43:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:34,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:34,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:34,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:34,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:34,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:34,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:34,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:35,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:36,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:36,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 08:43:36,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:43:36,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2384 [2020-10-14 08:43:36,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:36,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:36,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 08:43:36,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:43:36,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 08:43:36,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:43:36,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:43:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:36,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:36,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:36,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:43:36,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:43:36,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:43:36,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:36,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:36,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:43:36,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:43:36,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:43:36,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:43:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:43:36,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609966294] [2020-10-14 08:43:36,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:43:36,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 08:43:36,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987345107] [2020-10-14 08:43:36,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 08:43:36,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:43:36,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 08:43:36,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:43:36,869 INFO L87 Difference]: Start difference. First operand 100025 states and 136407 transitions. Second operand 10 states.