/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=NARROWEST --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_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 13:54:59,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 13:54:59,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 13:54:59,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 13:54:59,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 13:54:59,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 13:54:59,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 13:54:59,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 13:54:59,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 13:54:59,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 13:54:59,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 13:54:59,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 13:54:59,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 13:54:59,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 13:54:59,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 13:54:59,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 13:54:59,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 13:54:59,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 13:54:59,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 13:54:59,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 13:54:59,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 13:54:59,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 13:54:59,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 13:54:59,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 13:54:59,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 13:54:59,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 13:54:59,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 13:54:59,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 13:54:59,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 13:54:59,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 13:54:59,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 13:54:59,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 13:54:59,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 13:54:59,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 13:54:59,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 13:54:59,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 13:54:59,787 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 13:54:59,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 13:54:59,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 13:54:59,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 13:54:59,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 13:54:59,790 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 [2020-10-13 13:54:59,813 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 13:54:59,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 13:54:59,814 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 13:54:59,814 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 13:54:59,815 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 13:54:59,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 13:54:59,815 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 13:54:59,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 13:54:59,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 13:54:59,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 13:54:59,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 13:54:59,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 13:54:59,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 13:54:59,816 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 13:54:59,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 13:54:59,817 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 13:54:59,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 13:54:59,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 13:54:59,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 13:54:59,818 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 13:54:59,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 13:54:59,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:54:59,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 13:54:59,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 13:54:59,819 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 13:54:59,819 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 13:54:59,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 13:54:59,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 13:54:59,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 13:54:59,820 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 13:55:00,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 13:55:00,196 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 13:55:00,200 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 13:55:00,201 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 13:55:00,202 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 13:55:00,202 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 13:55:00,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/466c9e507/513c2b98550a487fb76913d2f6070020/FLAG7d578398a [2020-10-13 13:55:00,730 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 13:55:00,730 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 13:55:00,746 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/466c9e507/513c2b98550a487fb76913d2f6070020/FLAG7d578398a [2020-10-13 13:55:00,776 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/466c9e507/513c2b98550a487fb76913d2f6070020 [2020-10-13 13:55:00,787 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 13:55:00,790 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 13:55:00,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 13:55:00,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 13:55:00,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 13:55:00,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:55:00" (1/1) ... [2020-10-13 13:55:00,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f0588b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:00, skipping insertion in model container [2020-10-13 13:55:00,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:55:00" (1/1) ... [2020-10-13 13:55:00,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 13:55:00,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 13:55:01,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:55:01,252 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 13:55:01,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:55:01,361 INFO L208 MainTranslator]: Completed translation [2020-10-13 13:55:01,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:01 WrapperNode [2020-10-13 13:55:01,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 13:55:01,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 13:55:01,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 13:55:01,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 13:55:01,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:01" (1/1) ... [2020-10-13 13:55:01,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:01" (1/1) ... [2020-10-13 13:55:01,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:01" (1/1) ... [2020-10-13 13:55:01,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:01" (1/1) ... [2020-10-13 13:55:01,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:01" (1/1) ... [2020-10-13 13:55:01,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:01" (1/1) ... [2020-10-13 13:55:01,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:01" (1/1) ... [2020-10-13 13:55:01,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 13:55:01,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 13:55:01,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 13:55:01,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 13:55:01,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:01" (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 [2020-10-13 13:55:01,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 13:55:01,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 13:55:01,482 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 13:55:01,482 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 13:55:01,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 13:55:01,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 13:55:01,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 13:55:01,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 13:55:01,483 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 13:55:01,483 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 13:55:01,483 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 13:55:01,483 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 13:55:01,483 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 13:55:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 13:55:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 13:55:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 13:55:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 13:55:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 13:55:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 13:55:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 13:55:01,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 13:55:02,233 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 13:55:02,234 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 13:55:02,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:55:02 BoogieIcfgContainer [2020-10-13 13:55:02,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 13:55:02,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 13:55:02,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 13:55:02,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 13:55:02,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:55:00" (1/3) ... [2020-10-13 13:55:02,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43616d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:55:02, skipping insertion in model container [2020-10-13 13:55:02,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:01" (2/3) ... [2020-10-13 13:55:02,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43616d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:55:02, skipping insertion in model container [2020-10-13 13:55:02,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:55:02" (3/3) ... [2020-10-13 13:55:02,255 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 13:55:02,265 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 13:55:02,277 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 13:55:02,291 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 13:55:02,327 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 13:55:02,327 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 13:55:02,328 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 13:55:02,328 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 13:55:02,330 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 13:55:02,330 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 13:55:02,330 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 13:55:02,330 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 13:55:02,354 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states. [2020-10-13 13:55:02,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 13:55:02,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:02,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:02,373 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:02,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:02,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1611542725, now seen corresponding path program 1 times [2020-10-13 13:55:02,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:02,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631840492] [2020-10-13 13:55:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:02,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:02,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:03,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:03,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:04,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:04,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 13:55:04,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:55:04,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1861 [2020-10-13 13:55:04,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:04,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:55:04,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 13:55:04,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 13:55:04,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 13:55:04,892 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:55:04,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:04,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:04,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:04,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:04,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:04,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 13:55:04,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:04,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:04,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:04,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:04,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:55:04,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631840492] [2020-10-13 13:55:04,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:04,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 13:55:04,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219019056] [2020-10-13 13:55:04,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:55:04,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:04,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:55:04,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:55:04,964 INFO L87 Difference]: Start difference. First operand 145 states. Second operand 6 states. [2020-10-13 13:55:05,225 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-13 13:55:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:06,065 INFO L93 Difference]: Finished difference Result 659 states and 1106 transitions. [2020-10-13 13:55:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:55:06,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-13 13:55:06,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:06,085 INFO L225 Difference]: With dead ends: 659 [2020-10-13 13:55:06,086 INFO L226 Difference]: Without dead ends: 556 [2020-10-13 13:55:06,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 13:55:06,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-10-13 13:55:06,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 222. [2020-10-13 13:55:06,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-13 13:55:06,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 353 transitions. [2020-10-13 13:55:06,162 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 353 transitions. Word has length 60 [2020-10-13 13:55:06,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:06,162 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 353 transitions. [2020-10-13 13:55:06,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:55:06,163 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 353 transitions. [2020-10-13 13:55:06,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 13:55:06,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:06,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:06,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 13:55:06,167 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:06,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:06,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1643393529, now seen corresponding path program 1 times [2020-10-13 13:55:06,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:06,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878729406] [2020-10-13 13:55:06,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:06,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:06,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:06,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:06,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:06,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:08,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:08,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 13:55:08,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:55:08,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2391 [2020-10-13 13:55:08,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:08,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 13:55:08,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 13:55:08,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 13:55:08,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:55:08,971 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:55:08,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:08,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:08,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:08,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:08,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:09,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 13:55:09,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:09,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:09,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:09,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:09,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 13:55:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:55:09,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878729406] [2020-10-13 13:55:09,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:09,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 13:55:09,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122507716] [2020-10-13 13:55:09,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 13:55:09,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:09,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 13:55:09,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:55:09,047 INFO L87 Difference]: Start difference. First operand 222 states and 353 transitions. Second operand 7 states. [2020-10-13 13:55:09,409 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-13 13:55:10,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:10,481 INFO L93 Difference]: Finished difference Result 1378 states and 2286 transitions. [2020-10-13 13:55:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 13:55:10,481 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2020-10-13 13:55:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:10,489 INFO L225 Difference]: With dead ends: 1378 [2020-10-13 13:55:10,489 INFO L226 Difference]: Without dead ends: 1214 [2020-10-13 13:55:10,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-13 13:55:10,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2020-10-13 13:55:10,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 645. [2020-10-13 13:55:10,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2020-10-13 13:55:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1062 transitions. [2020-10-13 13:55:10,582 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1062 transitions. Word has length 61 [2020-10-13 13:55:10,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:10,583 INFO L479 AbstractCegarLoop]: Abstraction has 645 states and 1062 transitions. [2020-10-13 13:55:10,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 13:55:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1062 transitions. [2020-10-13 13:55:10,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 13:55:10,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:10,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:10,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 13:55:10,587 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:10,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:10,587 INFO L82 PathProgramCache]: Analyzing trace with hash 537355724, now seen corresponding path program 1 times [2020-10-13 13:55:10,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:10,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992192133] [2020-10-13 13:55:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:10,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:10,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:10,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:10,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:11,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:12,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:12,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 13:55:12,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:55:12,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1966 [2020-10-13 13:55:12,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:12,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:55:12,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 13:55:12,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 13:55:12,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:55:12,845 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:55:12,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:12,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:12,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:12,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:12,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:12,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 13:55:12,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:12,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:12,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:12,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:12,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:55:12,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992192133] [2020-10-13 13:55:12,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:12,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:55:12,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275750646] [2020-10-13 13:55:12,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:55:12,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:12,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:55:12,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:55:12,885 INFO L87 Difference]: Start difference. First operand 645 states and 1062 transitions. Second operand 5 states. [2020-10-13 13:55:13,145 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-13 13:55:13,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:13,809 INFO L93 Difference]: Finished difference Result 2260 states and 3771 transitions. [2020-10-13 13:55:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:55:13,809 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-10-13 13:55:13,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:13,820 INFO L225 Difference]: With dead ends: 2260 [2020-10-13 13:55:13,820 INFO L226 Difference]: Without dead ends: 1725 [2020-10-13 13:55:13,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:55:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2020-10-13 13:55:13,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1181. [2020-10-13 13:55:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1181 states. [2020-10-13 13:55:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1958 transitions. [2020-10-13 13:55:13,918 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1958 transitions. Word has length 62 [2020-10-13 13:55:13,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:13,919 INFO L479 AbstractCegarLoop]: Abstraction has 1181 states and 1958 transitions. [2020-10-13 13:55:13,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:55:13,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1958 transitions. [2020-10-13 13:55:13,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 13:55:13,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:13,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:13,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 13:55:13,923 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:13,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:13,923 INFO L82 PathProgramCache]: Analyzing trace with hash -574336146, now seen corresponding path program 1 times [2020-10-13 13:55:13,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:13,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620845561] [2020-10-13 13:55:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:14,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:14,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:14,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:14,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:14,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:15,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:15,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 13:55:15,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:55:15,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1799 [2020-10-13 13:55:15,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:15,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:55:15,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 13:55:15,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 13:55:15,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:55:15,957 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:55:15,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:15,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:15,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:15,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:15,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:15,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:55:15,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:15,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:15,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:15,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:15,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:55:15,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620845561] [2020-10-13 13:55:15,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:15,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:55:15,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765058291] [2020-10-13 13:55:15,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:55:15,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:15,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:55:15,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:55:15,988 INFO L87 Difference]: Start difference. First operand 1181 states and 1958 transitions. Second operand 5 states. [2020-10-13 13:55:16,211 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-13 13:55:16,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:16,955 INFO L93 Difference]: Finished difference Result 4364 states and 7283 transitions. [2020-10-13 13:55:16,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:55:16,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-13 13:55:16,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:16,972 INFO L225 Difference]: With dead ends: 4364 [2020-10-13 13:55:16,973 INFO L226 Difference]: Without dead ends: 3303 [2020-10-13 13:55:16,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:55:16,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3303 states. [2020-10-13 13:55:17,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3303 to 2226. [2020-10-13 13:55:17,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2226 states. [2020-10-13 13:55:17,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 3696 transitions. [2020-10-13 13:55:17,184 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 3696 transitions. Word has length 63 [2020-10-13 13:55:17,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:17,185 INFO L479 AbstractCegarLoop]: Abstraction has 2226 states and 3696 transitions. [2020-10-13 13:55:17,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:55:17,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 3696 transitions. [2020-10-13 13:55:17,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 13:55:17,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:17,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:17,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 13:55:17,188 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:17,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:17,188 INFO L82 PathProgramCache]: Analyzing trace with hash 224317013, now seen corresponding path program 1 times [2020-10-13 13:55:17,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:17,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207206178] [2020-10-13 13:55:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:17,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:17,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:17,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:17,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:17,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:17,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:19,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:19,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:22,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:22,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 13:55:22,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 13:55:22,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 13:55:22,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:22,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:55:22,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 13:55:22,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 13:55:22,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:22,484 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:55:22,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:22,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:22,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:22,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:22,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:22,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 13:55:22,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:22,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:22,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:22,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:22,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:55:22,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207206178] [2020-10-13 13:55:22,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:22,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:55:22,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497989834] [2020-10-13 13:55:22,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:55:22,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:22,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:55:22,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:55:22,559 INFO L87 Difference]: Start difference. First operand 2226 states and 3696 transitions. Second operand 5 states. [2020-10-13 13:55:23,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:23,583 INFO L93 Difference]: Finished difference Result 6199 states and 10323 transitions. [2020-10-13 13:55:23,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:55:23,584 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-13 13:55:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:23,604 INFO L225 Difference]: With dead ends: 6199 [2020-10-13 13:55:23,604 INFO L226 Difference]: Without dead ends: 4082 [2020-10-13 13:55:23,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:55:23,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2020-10-13 13:55:23,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 4024. [2020-10-13 13:55:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4024 states. [2020-10-13 13:55:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4024 states to 4024 states and 6648 transitions. [2020-10-13 13:55:23,899 INFO L78 Accepts]: Start accepts. Automaton has 4024 states and 6648 transitions. Word has length 65 [2020-10-13 13:55:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:23,900 INFO L479 AbstractCegarLoop]: Abstraction has 4024 states and 6648 transitions. [2020-10-13 13:55:23,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:55:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4024 states and 6648 transitions. [2020-10-13 13:55:23,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 13:55:23,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:23,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:23,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 13:55:23,902 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:23,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:23,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1472759263, now seen corresponding path program 1 times [2020-10-13 13:55:23,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:23,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891225134] [2020-10-13 13:55:23,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:23,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:23,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:24,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:24,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:24,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:25,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:25,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:28,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:28,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 13:55:28,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 13:55:28,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 13:55:28,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:28,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:55:28,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 13:55:28,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 13:55:28,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 13:55:29,150 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:55:29,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:29,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:29,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:29,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:29,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:29,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 13:55:29,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:29,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:29,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:29,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:29,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:55:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:55:29,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891225134] [2020-10-13 13:55:29,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:29,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:55:29,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022193183] [2020-10-13 13:55:29,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:55:29,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:29,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:55:29,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:55:29,193 INFO L87 Difference]: Start difference. First operand 4024 states and 6648 transitions. Second operand 4 states. [2020-10-13 13:55:29,445 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-13 13:55:30,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:30,947 INFO L93 Difference]: Finished difference Result 10983 states and 18223 transitions. [2020-10-13 13:55:30,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:55:30,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-13 13:55:30,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:30,984 INFO L225 Difference]: With dead ends: 10983 [2020-10-13 13:55:30,985 INFO L226 Difference]: Without dead ends: 7051 [2020-10-13 13:55:30,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:55:31,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7051 states. [2020-10-13 13:55:31,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7051 to 7049. [2020-10-13 13:55:31,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7049 states. [2020-10-13 13:55:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7049 states to 7049 states and 11649 transitions. [2020-10-13 13:55:31,498 INFO L78 Accepts]: Start accepts. Automaton has 7049 states and 11649 transitions. Word has length 65 [2020-10-13 13:55:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:31,499 INFO L479 AbstractCegarLoop]: Abstraction has 7049 states and 11649 transitions. [2020-10-13 13:55:31,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:55:31,499 INFO L276 IsEmpty]: Start isEmpty. Operand 7049 states and 11649 transitions. [2020-10-13 13:55:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 13:55:31,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:31,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:31,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 13:55:31,502 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:31,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:31,502 INFO L82 PathProgramCache]: Analyzing trace with hash 624109630, now seen corresponding path program 1 times [2020-10-13 13:55:31,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:31,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836182498] [2020-10-13 13:55:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:31,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:31,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:31,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:31,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:32,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:32,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:32,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 13:55:32,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:55:32,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1073 [2020-10-13 13:55:32,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:32,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:55:32,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 13:55:32,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 13:55:32,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:55:32,806 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:55:32,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:32,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:32,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:32,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:32,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:32,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:55:32,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:32,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:32,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:32,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:32,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:32,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:55:32,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836182498] [2020-10-13 13:55:32,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:32,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:55:32,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974733165] [2020-10-13 13:55:32,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:55:32,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:32,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:55:32,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:55:32,833 INFO L87 Difference]: Start difference. First operand 7049 states and 11649 transitions. Second operand 4 states. [2020-10-13 13:55:34,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:34,084 INFO L93 Difference]: Finished difference Result 18697 states and 30690 transitions. [2020-10-13 13:55:34,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:55:34,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-13 13:55:34,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:34,135 INFO L225 Difference]: With dead ends: 18697 [2020-10-13 13:55:34,135 INFO L226 Difference]: Without dead ends: 11749 [2020-10-13 13:55:34,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:55:34,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11749 states. [2020-10-13 13:55:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11749 to 11522. [2020-10-13 13:55:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11522 states. [2020-10-13 13:55:35,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11522 states to 11522 states and 18547 transitions. [2020-10-13 13:55:35,014 INFO L78 Accepts]: Start accepts. Automaton has 11522 states and 18547 transitions. Word has length 65 [2020-10-13 13:55:35,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:35,014 INFO L479 AbstractCegarLoop]: Abstraction has 11522 states and 18547 transitions. [2020-10-13 13:55:35,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:55:35,014 INFO L276 IsEmpty]: Start isEmpty. Operand 11522 states and 18547 transitions. [2020-10-13 13:55:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 13:55:35,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:35,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:35,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 13:55:35,016 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:35,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash -280562700, now seen corresponding path program 1 times [2020-10-13 13:55:35,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:35,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952676557] [2020-10-13 13:55:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:35,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:35,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:35,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:35,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:35,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:35,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:37,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:40,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:40,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 13:55:40,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 13:55:40,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 13:55:40,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:40,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:55:40,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 13:55:40,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 13:55:40,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:40,223 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:55:40,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:40,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:40,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:40,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:40,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:40,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 13:55:40,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:40,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:40,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:40,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:40,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:55:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:55:40,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952676557] [2020-10-13 13:55:40,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:40,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:55:40,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753953133] [2020-10-13 13:55:40,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:55:40,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:40,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:55:40,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:55:40,264 INFO L87 Difference]: Start difference. First operand 11522 states and 18547 transitions. Second operand 4 states. [2020-10-13 13:55:40,473 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-13 13:55:41,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:41,813 INFO L93 Difference]: Finished difference Result 29726 states and 47653 transitions. [2020-10-13 13:55:41,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:55:41,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-13 13:55:41,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:41,862 INFO L225 Difference]: With dead ends: 29726 [2020-10-13 13:55:41,862 INFO L226 Difference]: Without dead ends: 18312 [2020-10-13 13:55:41,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:55:41,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18312 states. [2020-10-13 13:55:43,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18312 to 18260. [2020-10-13 13:55:43,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18260 states. [2020-10-13 13:55:43,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18260 states to 18260 states and 28957 transitions. [2020-10-13 13:55:43,695 INFO L78 Accepts]: Start accepts. Automaton has 18260 states and 28957 transitions. Word has length 65 [2020-10-13 13:55:43,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:43,696 INFO L479 AbstractCegarLoop]: Abstraction has 18260 states and 28957 transitions. [2020-10-13 13:55:43,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:55:43,696 INFO L276 IsEmpty]: Start isEmpty. Operand 18260 states and 28957 transitions. [2020-10-13 13:55:43,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 13:55:43,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:43,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:43,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 13:55:43,703 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:43,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:43,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1743105731, now seen corresponding path program 1 times [2020-10-13 13:55:43,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:43,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139474695] [2020-10-13 13:55:43,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:43,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:43,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:43,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:43,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:43,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:44,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:45,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:45,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:48,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:48,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 13:55:48,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 13:55:48,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 13:55:48,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:48,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:55:48,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 13:55:48,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 13:55:48,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:48,903 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:55:48,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:48,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:48,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:48,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:48,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:48,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:55:48,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:48,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:48,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:48,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:48,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:55:48,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139474695] [2020-10-13 13:55:48,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:48,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:55:48,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893741962] [2020-10-13 13:55:48,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:55:48,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:48,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:55:48,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:55:48,930 INFO L87 Difference]: Start difference. First operand 18260 states and 28957 transitions. Second operand 4 states. [2020-10-13 13:55:49,117 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-13 13:55:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:50,888 INFO L93 Difference]: Finished difference Result 46552 states and 73919 transitions. [2020-10-13 13:55:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:55:50,889 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-13 13:55:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:50,956 INFO L225 Difference]: With dead ends: 46552 [2020-10-13 13:55:50,956 INFO L226 Difference]: Without dead ends: 28350 [2020-10-13 13:55:51,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:55:51,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28350 states. [2020-10-13 13:55:52,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28350 to 28348. [2020-10-13 13:55:52,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28348 states. [2020-10-13 13:55:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28348 states to 28348 states and 44589 transitions. [2020-10-13 13:55:52,437 INFO L78 Accepts]: Start accepts. Automaton has 28348 states and 44589 transitions. Word has length 65 [2020-10-13 13:55:52,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:52,437 INFO L479 AbstractCegarLoop]: Abstraction has 28348 states and 44589 transitions. [2020-10-13 13:55:52,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:55:52,437 INFO L276 IsEmpty]: Start isEmpty. Operand 28348 states and 44589 transitions. [2020-10-13 13:55:52,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 13:55:52,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:52,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:52,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 13:55:52,439 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:52,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:52,439 INFO L82 PathProgramCache]: Analyzing trace with hash 926195294, now seen corresponding path program 1 times [2020-10-13 13:55:52,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:52,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176502399] [2020-10-13 13:55:52,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:52,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:52,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:52,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:52,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:52,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:52,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:52,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 13:55:52,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:55:52,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 500 [2020-10-13 13:55:52,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:52,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:55:52,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 13:55:52,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 13:55:52,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:53,133 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:55:53,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:53,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:53,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:53,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:53,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:53,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 13:55:53,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:53,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:53,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:53,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:53,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:55:53,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176502399] [2020-10-13 13:55:53,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:53,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:55:53,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509385866] [2020-10-13 13:55:53,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:55:53,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:53,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:55:53,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:55:53,163 INFO L87 Difference]: Start difference. First operand 28348 states and 44589 transitions. Second operand 4 states. [2020-10-13 13:55:53,350 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-13 13:55:55,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:55,188 INFO L93 Difference]: Finished difference Result 61411 states and 96792 transitions. [2020-10-13 13:55:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:55:55,189 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-13 13:55:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:55,261 INFO L225 Difference]: With dead ends: 61411 [2020-10-13 13:55:55,261 INFO L226 Difference]: Without dead ends: 33121 [2020-10-13 13:55:55,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:55:55,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33121 states. [2020-10-13 13:55:56,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33121 to 33015. [2020-10-13 13:55:56,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33015 states. [2020-10-13 13:55:57,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33015 states to 33015 states and 51694 transitions. [2020-10-13 13:55:57,010 INFO L78 Accepts]: Start accepts. Automaton has 33015 states and 51694 transitions. Word has length 66 [2020-10-13 13:55:57,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:57,011 INFO L479 AbstractCegarLoop]: Abstraction has 33015 states and 51694 transitions. [2020-10-13 13:55:57,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:55:57,011 INFO L276 IsEmpty]: Start isEmpty. Operand 33015 states and 51694 transitions. [2020-10-13 13:55:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 13:55:57,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:57,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:57,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 13:55:57,012 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:57,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:57,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1203796463, now seen corresponding path program 1 times [2020-10-13 13:55:57,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:57,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894916830] [2020-10-13 13:55:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:57,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:57,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:57,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:57,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:57,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:58,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:58,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 13:55:58,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:55:58,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1764 [2020-10-13 13:55:58,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:58,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:55:58,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 13:55:58,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 13:55:58,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:58,961 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:55:58,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:58,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:58,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:58,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:58,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:58,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:55:58,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:58,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:58,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:58,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:58,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:55:58,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894916830] [2020-10-13 13:55:58,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:58,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:55:58,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794732839] [2020-10-13 13:55:58,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:55:58,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:58,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:55:58,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:55:58,987 INFO L87 Difference]: Start difference. First operand 33015 states and 51694 transitions. Second operand 4 states. [2020-10-13 13:55:59,161 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-13 13:56:01,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:56:01,270 INFO L93 Difference]: Finished difference Result 70676 states and 110687 transitions. [2020-10-13 13:56:01,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:56:01,270 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-13 13:56:01,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:56:01,341 INFO L225 Difference]: With dead ends: 70676 [2020-10-13 13:56:01,342 INFO L226 Difference]: Without dead ends: 37720 [2020-10-13 13:56:01,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:56:01,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37720 states. [2020-10-13 13:56:03,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37720 to 37612. [2020-10-13 13:56:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37612 states. [2020-10-13 13:56:03,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37612 states to 37612 states and 58751 transitions. [2020-10-13 13:56:03,415 INFO L78 Accepts]: Start accepts. Automaton has 37612 states and 58751 transitions. Word has length 67 [2020-10-13 13:56:03,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:56:03,415 INFO L479 AbstractCegarLoop]: Abstraction has 37612 states and 58751 transitions. [2020-10-13 13:56:03,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:56:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand 37612 states and 58751 transitions. [2020-10-13 13:56:03,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 13:56:03,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:56:03,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:56:03,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 13:56:03,416 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:56:03,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:56:03,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1612815006, now seen corresponding path program 1 times [2020-10-13 13:56:03,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:56:03,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420959344] [2020-10-13 13:56:03,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:56:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:03,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:03,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:03,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:03,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:03,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:05,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:08,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:08,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 13:56:08,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:56:08,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 13:56:08,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:08,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:56:08,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 13:56:08,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 13:56:08,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:08,653 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:56:08,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:56:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:08,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:08,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:08,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:56:08,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:56:08,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:56:08,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:08,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:56:08,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:56:08,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:56:08,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:56:08,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420959344] [2020-10-13 13:56:08,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:56:08,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 13:56:08,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387893089] [2020-10-13 13:56:08,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:56:08,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:56:08,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:56:08,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:56:08,676 INFO L87 Difference]: Start difference. First operand 37612 states and 58751 transitions. Second operand 6 states. [2020-10-13 13:56:08,884 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-13 13:56:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:56:12,594 INFO L93 Difference]: Finished difference Result 110174 states and 172477 transitions. [2020-10-13 13:56:12,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:56:12,594 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-13 13:56:12,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:56:12,691 INFO L225 Difference]: With dead ends: 110174 [2020-10-13 13:56:12,692 INFO L226 Difference]: Without dead ends: 72634 [2020-10-13 13:56:12,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 13:56:12,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72634 states. [2020-10-13 13:56:14,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72634 to 37612. [2020-10-13 13:56:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37612 states. [2020-10-13 13:56:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37612 states to 37612 states and 58545 transitions. [2020-10-13 13:56:15,005 INFO L78 Accepts]: Start accepts. Automaton has 37612 states and 58545 transitions. Word has length 69 [2020-10-13 13:56:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:56:15,006 INFO L479 AbstractCegarLoop]: Abstraction has 37612 states and 58545 transitions. [2020-10-13 13:56:15,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:56:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 37612 states and 58545 transitions. [2020-10-13 13:56:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 13:56:15,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:56:15,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:56:15,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 13:56:15,007 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:56:15,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:56:15,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1818175101, now seen corresponding path program 1 times [2020-10-13 13:56:15,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:56:15,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627043526] [2020-10-13 13:56:15,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:56:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:15,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:15,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:15,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:15,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:15,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:16,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:18,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:18,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 13:56:18,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:56:18,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3934 [2020-10-13 13:56:18,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:18,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:56:18,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 13:56:18,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 13:56:18,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:19,163 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:56:19,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:56:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:19,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:19,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:19,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:56:19,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:56:19,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:56:19,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:19,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:56:19,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:56:19,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:56:19,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:56:19,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627043526] [2020-10-13 13:56:19,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:56:19,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 13:56:19,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003440855] [2020-10-13 13:56:19,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:56:19,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:56:19,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:56:19,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:56:19,185 INFO L87 Difference]: Start difference. First operand 37612 states and 58545 transitions. Second operand 6 states. [2020-10-13 13:56:19,399 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-13 13:56:27,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:56:27,785 INFO L93 Difference]: Finished difference Result 173444 states and 270969 transitions. [2020-10-13 13:56:27,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:56:27,785 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-13 13:56:27,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:56:27,949 INFO L225 Difference]: With dead ends: 173444 [2020-10-13 13:56:27,950 INFO L226 Difference]: Without dead ends: 135904 [2020-10-13 13:56:27,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 13:56:28,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135904 states. [2020-10-13 13:56:32,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135904 to 69764. [2020-10-13 13:56:32,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69764 states. [2020-10-13 13:56:32,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69764 states to 69764 states and 108187 transitions. [2020-10-13 13:56:32,388 INFO L78 Accepts]: Start accepts. Automaton has 69764 states and 108187 transitions. Word has length 72 [2020-10-13 13:56:32,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:56:32,389 INFO L479 AbstractCegarLoop]: Abstraction has 69764 states and 108187 transitions. [2020-10-13 13:56:32,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:56:32,389 INFO L276 IsEmpty]: Start isEmpty. Operand 69764 states and 108187 transitions. [2020-10-13 13:56:32,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 13:56:32,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:56:32,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:56:32,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 13:56:32,390 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:56:32,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:56:32,390 INFO L82 PathProgramCache]: Analyzing trace with hash 526943995, now seen corresponding path program 1 times [2020-10-13 13:56:32,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:56:32,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926457249] [2020-10-13 13:56:32,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:56:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:32,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:32,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:32,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:32,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:32,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:33,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:35,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:35,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 13:56:35,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:56:35,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3091 [2020-10-13 13:56:35,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:56:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-13 13:56:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 13:56:35,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:35,678 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:56:35,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:56:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:35,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:35,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:35,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:56:35,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:56:35,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:56:35,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:56:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:56:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:56:35,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:56:35,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926457249] [2020-10-13 13:56:35,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:56:35,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:56:35,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854641475] [2020-10-13 13:56:35,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:56:35,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:56:35,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:56:35,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:56:35,696 INFO L87 Difference]: Start difference. First operand 69764 states and 108187 transitions. Second operand 5 states. [2020-10-13 13:56:42,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:56:42,591 INFO L93 Difference]: Finished difference Result 97308 states and 149233 transitions. [2020-10-13 13:56:42,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:56:42,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-13 13:56:42,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:56:42,720 INFO L225 Difference]: With dead ends: 97308 [2020-10-13 13:56:42,721 INFO L226 Difference]: Without dead ends: 97306 [2020-10-13 13:56:42,742 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 [2020-10-13 13:56:42,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97306 states. [2020-10-13 13:56:47,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97306 to 70508. [2020-10-13 13:56:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70508 states. [2020-10-13 13:56:47,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70508 states to 70508 states and 108881 transitions. [2020-10-13 13:56:47,319 INFO L78 Accepts]: Start accepts. Automaton has 70508 states and 108881 transitions. Word has length 73 [2020-10-13 13:56:47,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:56:47,320 INFO L479 AbstractCegarLoop]: Abstraction has 70508 states and 108881 transitions. [2020-10-13 13:56:47,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:56:47,320 INFO L276 IsEmpty]: Start isEmpty. Operand 70508 states and 108881 transitions. [2020-10-13 13:56:47,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 13:56:47,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:56:47,324 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:56:47,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 13:56:47,324 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:56:47,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:56:47,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1721713085, now seen corresponding path program 1 times [2020-10-13 13:56:47,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:56:47,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302069469] [2020-10-13 13:56:47,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:56:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:47,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:47,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:47,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:47,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:47,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:47,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:48,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:48,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:50,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:50,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:50,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:52,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:52,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 13:56:52,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 13:56:52,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 13:56:52,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:56:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 13:56:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 13:56:52,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:52,526 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:56:52,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:56:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:52,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:52,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:52,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:56:52,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:56:52,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:56:52,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:52,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:56:52,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:56:52,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:56:52,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:56:52,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302069469] [2020-10-13 13:56:52,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:56:52,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:56:52,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404931422] [2020-10-13 13:56:52,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:56:52,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:56:52,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:56:52,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:56:52,550 INFO L87 Difference]: Start difference. First operand 70508 states and 108881 transitions. Second operand 4 states. [2020-10-13 13:56:56,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:56:56,833 INFO L93 Difference]: Finished difference Result 131060 states and 202823 transitions. [2020-10-13 13:56:56,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:56:56,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-10-13 13:56:56,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:56:56,915 INFO L225 Difference]: With dead ends: 131060 [2020-10-13 13:56:56,915 INFO L226 Difference]: Without dead ends: 60624 [2020-10-13 13:56:56,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:56:57,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60624 states. [2020-10-13 13:57:01,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60624 to 59258. [2020-10-13 13:57:01,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59258 states. [2020-10-13 13:57:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59258 states to 59258 states and 91288 transitions. [2020-10-13 13:57:01,108 INFO L78 Accepts]: Start accepts. Automaton has 59258 states and 91288 transitions. Word has length 93 [2020-10-13 13:57:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:57:01,108 INFO L479 AbstractCegarLoop]: Abstraction has 59258 states and 91288 transitions. [2020-10-13 13:57:01,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:57:01,109 INFO L276 IsEmpty]: Start isEmpty. Operand 59258 states and 91288 transitions. [2020-10-13 13:57:01,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 13:57:01,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:57:01,110 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:57:01,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 13:57:01,110 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:57:01,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:57:01,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1980585892, now seen corresponding path program 1 times [2020-10-13 13:57:01,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:57:01,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130646979] [2020-10-13 13:57:01,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:57:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:01,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:01,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:01,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:01,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:01,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:01,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:03,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:03,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:03,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:03,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:03,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:06,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:06,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 13:57:06,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 13:57:06,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 13:57:06,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:06,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:57:06,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 13:57:06,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 13:57:06,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:06,313 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:57:06,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:57:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:06,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:06,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:06,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:57:06,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:57:06,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:57:06,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:06,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:57:06,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:57:06,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:57:06,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:57:06,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130646979] [2020-10-13 13:57:06,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:57:06,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:57:06,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254023373] [2020-10-13 13:57:06,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:57:06,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:57:06,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:57:06,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:57:06,341 INFO L87 Difference]: Start difference. First operand 59258 states and 91288 transitions. Second operand 4 states. [2020-10-13 13:57:09,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:57:09,576 INFO L93 Difference]: Finished difference Result 85078 states and 131019 transitions. [2020-10-13 13:57:09,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:57:09,577 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-10-13 13:57:09,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:57:09,607 INFO L225 Difference]: With dead ends: 85078 [2020-10-13 13:57:09,607 INFO L226 Difference]: Without dead ends: 25932 [2020-10-13 13:57:09,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:57:09,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25932 states. [2020-10-13 13:57:11,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25932 to 20518. [2020-10-13 13:57:11,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20518 states. [2020-10-13 13:57:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20518 states to 20518 states and 31324 transitions. [2020-10-13 13:57:11,048 INFO L78 Accepts]: Start accepts. Automaton has 20518 states and 31324 transitions. Word has length 93 [2020-10-13 13:57:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:57:11,049 INFO L479 AbstractCegarLoop]: Abstraction has 20518 states and 31324 transitions. [2020-10-13 13:57:11,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:57:11,049 INFO L276 IsEmpty]: Start isEmpty. Operand 20518 states and 31324 transitions. [2020-10-13 13:57:11,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 13:57:11,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:57:11,052 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:57:11,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 13:57:11,052 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:57:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:57:11,052 INFO L82 PathProgramCache]: Analyzing trace with hash 875537890, now seen corresponding path program 1 times [2020-10-13 13:57:11,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:57:11,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494212008] [2020-10-13 13:57:11,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:57:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:11,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:11,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:11,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:11,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:11,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:11,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:12,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:12,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:12,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:12,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:16,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:16,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 13:57:16,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 13:57:16,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 13:57:16,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:16,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:57:16,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 13:57:16,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 13:57:16,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:16,251 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:57:16,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:57:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:16,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:16,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:16,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:57:16,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:57:16,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:57:16,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:16,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:57:16,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:57:16,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:57:16,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 13:57:16,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494212008] [2020-10-13 13:57:16,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:57:16,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:57:16,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666315551] [2020-10-13 13:57:16,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:57:16,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:57:16,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:57:16,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:57:16,279 INFO L87 Difference]: Start difference. First operand 20518 states and 31324 transitions. Second operand 4 states. [2020-10-13 13:57:16,457 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-13 13:57:18,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:57:18,658 INFO L93 Difference]: Finished difference Result 46500 states and 70938 transitions. [2020-10-13 13:57:18,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:57:18,659 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-10-13 13:57:18,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:57:18,684 INFO L225 Difference]: With dead ends: 46500 [2020-10-13 13:57:18,685 INFO L226 Difference]: Without dead ends: 26078 [2020-10-13 13:57:18,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:57:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26078 states. [2020-10-13 13:57:20,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26078 to 25952. [2020-10-13 13:57:20,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25952 states. [2020-10-13 13:57:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25952 states to 25952 states and 39373 transitions. [2020-10-13 13:57:20,381 INFO L78 Accepts]: Start accepts. Automaton has 25952 states and 39373 transitions. Word has length 95 [2020-10-13 13:57:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:57:20,381 INFO L479 AbstractCegarLoop]: Abstraction has 25952 states and 39373 transitions. [2020-10-13 13:57:20,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:57:20,381 INFO L276 IsEmpty]: Start isEmpty. Operand 25952 states and 39373 transitions. [2020-10-13 13:57:20,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 13:57:20,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:57:20,382 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:57:20,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 13:57:20,383 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:57:20,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:57:20,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1577103426, now seen corresponding path program 1 times [2020-10-13 13:57:20,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:57:20,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542580152] [2020-10-13 13:57:20,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:57:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:20,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:20,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:20,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:20,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:20,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:20,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:20,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:21,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:21,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:24,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:24,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:24,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:25,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:25,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:25,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 13:57:25,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 13:57:25,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 13:57:25,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:25,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:57:25,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:57:25,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 13:57:25,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:25,598 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:57:25,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:57:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:25,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:25,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:25,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:57:25,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:57:25,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:57:25,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:25,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:57:25,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:57:25,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:57:25,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 13:57:25,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542580152] [2020-10-13 13:57:25,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:57:25,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:57:25,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722351670] [2020-10-13 13:57:25,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:57:25,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:57:25,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:57:25,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:57:25,625 INFO L87 Difference]: Start difference. First operand 25952 states and 39373 transitions. Second operand 5 states. [2020-10-13 13:57:30,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:57:30,030 INFO L93 Difference]: Finished difference Result 76429 states and 115800 transitions. [2020-10-13 13:57:30,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:57:30,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-10-13 13:57:30,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:57:30,086 INFO L225 Difference]: With dead ends: 76429 [2020-10-13 13:57:30,087 INFO L226 Difference]: Without dead ends: 50490 [2020-10-13 13:57:30,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:57:30,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50490 states. [2020-10-13 13:57:33,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50490 to 50488. [2020-10-13 13:57:33,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50488 states. [2020-10-13 13:57:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50488 states to 50488 states and 75822 transitions. [2020-10-13 13:57:33,883 INFO L78 Accepts]: Start accepts. Automaton has 50488 states and 75822 transitions. Word has length 99 [2020-10-13 13:57:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:57:33,883 INFO L479 AbstractCegarLoop]: Abstraction has 50488 states and 75822 transitions. [2020-10-13 13:57:33,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:57:33,883 INFO L276 IsEmpty]: Start isEmpty. Operand 50488 states and 75822 transitions. [2020-10-13 13:57:33,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 13:57:33,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:57:33,886 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:57:33,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 13:57:33,887 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:57:33,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:57:33,887 INFO L82 PathProgramCache]: Analyzing trace with hash 214351160, now seen corresponding path program 1 times [2020-10-13 13:57:33,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:57:33,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148433024] [2020-10-13 13:57:33,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:57:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:33,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:33,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:33,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:33,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:33,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:34,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:34,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:34,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:35,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:35,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:35,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:38,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:38,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 13:57:38,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 13:57:38,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 13:57:38,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:38,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:57:38,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:57:38,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 13:57:38,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:39,065 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:57:39,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:57:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:39,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:39,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:39,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:57:39,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:57:39,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:57:39,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:39,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:57:39,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:57:39,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:57:39,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 13:57:39,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148433024] [2020-10-13 13:57:39,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:57:39,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:57:39,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284319508] [2020-10-13 13:57:39,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:57:39,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:57:39,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:57:39,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:57:39,087 INFO L87 Difference]: Start difference. First operand 50488 states and 75822 transitions. Second operand 4 states. [2020-10-13 13:57:47,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:57:47,153 INFO L93 Difference]: Finished difference Result 151418 states and 227396 transitions. [2020-10-13 13:57:47,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:57:47,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-10-13 13:57:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:57:47,277 INFO L225 Difference]: With dead ends: 151418 [2020-10-13 13:57:47,277 INFO L226 Difference]: Without dead ends: 100962 [2020-10-13 13:57:47,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:57:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100962 states. [2020-10-13 13:57:53,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100962 to 50490. [2020-10-13 13:57:53,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50490 states. [2020-10-13 13:57:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50490 states to 50490 states and 75824 transitions. [2020-10-13 13:57:53,354 INFO L78 Accepts]: Start accepts. Automaton has 50490 states and 75824 transitions. Word has length 100 [2020-10-13 13:57:53,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:57:53,354 INFO L479 AbstractCegarLoop]: Abstraction has 50490 states and 75824 transitions. [2020-10-13 13:57:53,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:57:53,354 INFO L276 IsEmpty]: Start isEmpty. Operand 50490 states and 75824 transitions. [2020-10-13 13:57:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 13:57:53,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:57:53,357 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:57:53,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 13:57:53,357 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:57:53,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:57:53,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1805540001, now seen corresponding path program 1 times [2020-10-13 13:57:53,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:57:53,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480890642] [2020-10-13 13:57:53,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:57:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:53,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:53,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:53,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:53,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:53,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:53,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:53,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:53,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:54,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:57,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:57,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:57,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:58,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:58,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 13:57:58,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 13:57:58,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 13:57:58,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:58,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:57:58,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 13:57:58,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 13:57:58,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:58,589 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:57:58,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:57:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:58,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:58,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:58,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:57:58,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:57:58,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:57:58,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:58,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:57:58,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:57:58,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:57:58,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 13:57:58,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480890642] [2020-10-13 13:57:58,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:57:58,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:57:58,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922692188] [2020-10-13 13:57:58,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:57:58,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:57:58,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:57:58,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:57:58,617 INFO L87 Difference]: Start difference. First operand 50490 states and 75824 transitions. Second operand 5 states. [2020-10-13 13:58:03,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:58:03,156 INFO L93 Difference]: Finished difference Result 100962 states and 151623 transitions. [2020-10-13 13:58:03,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:58:03,157 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 101 [2020-10-13 13:58:03,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:58:03,214 INFO L225 Difference]: With dead ends: 100962 [2020-10-13 13:58:03,214 INFO L226 Difference]: Without dead ends: 50490 [2020-10-13 13:58:03,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:58:03,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50490 states. [2020-10-13 13:58:07,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50490 to 50489. [2020-10-13 13:58:07,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50489 states. [2020-10-13 13:58:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50489 states to 50489 states and 75821 transitions. [2020-10-13 13:58:07,319 INFO L78 Accepts]: Start accepts. Automaton has 50489 states and 75821 transitions. Word has length 101 [2020-10-13 13:58:07,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:58:07,319 INFO L479 AbstractCegarLoop]: Abstraction has 50489 states and 75821 transitions. [2020-10-13 13:58:07,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:58:07,320 INFO L276 IsEmpty]: Start isEmpty. Operand 50489 states and 75821 transitions. [2020-10-13 13:58:07,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 13:58:07,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:58:07,323 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:58:07,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 13:58:07,323 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:58:07,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:58:07,324 INFO L82 PathProgramCache]: Analyzing trace with hash 410612854, now seen corresponding path program 1 times [2020-10-13 13:58:07,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:58:07,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073983784] [2020-10-13 13:58:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:58:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:58:07,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:07,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:07,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:07,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:07,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:07,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:07,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:07,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:07,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:08,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:09,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:12,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:58:12,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 13:58:12,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 13:58:12,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-13 13:58:12,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:58:12,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:58:12,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:58:12,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 13:58:12,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:58:12,587 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:58:12,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:58:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:58:12,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:12,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:58:12,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:58:12,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:58:12,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:58:12,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:58:12,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:58:12,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:58:12,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:58:12,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:58:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 13:58:12,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073983784] [2020-10-13 13:58:12,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:58:12,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:58:12,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138855456] [2020-10-13 13:58:12,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:58:12,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:58:12,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:58:12,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:58:12,612 INFO L87 Difference]: Start difference. First operand 50489 states and 75821 transitions. Second operand 5 states. [2020-10-13 13:58:21,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:58:21,413 INFO L93 Difference]: Finished difference Result 147705 states and 221459 transitions. [2020-10-13 13:58:21,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:58:21,414 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 101 [2020-10-13 13:58:21,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:58:21,537 INFO L225 Difference]: With dead ends: 147705 [2020-10-13 13:58:21,538 INFO L226 Difference]: Without dead ends: 97255 [2020-10-13 13:58:21,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:58:21,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97255 states. [2020-10-13 13:58:30,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97255 to 97253. [2020-10-13 13:58:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97253 states. [2020-10-13 13:58:33,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97253 states to 97253 states and 144227 transitions. [2020-10-13 13:58:33,238 INFO L78 Accepts]: Start accepts. Automaton has 97253 states and 144227 transitions. Word has length 101 [2020-10-13 13:58:33,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:58:33,239 INFO L479 AbstractCegarLoop]: Abstraction has 97253 states and 144227 transitions. [2020-10-13 13:58:33,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:58:33,239 INFO L276 IsEmpty]: Start isEmpty. Operand 97253 states and 144227 transitions. [2020-10-13 13:58:33,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 13:58:33,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:58:33,242 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:58:33,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 13:58:33,243 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:58:33,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:58:33,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1735876339, now seen corresponding path program 1 times [2020-10-13 13:58:33,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:58:33,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041986872] [2020-10-13 13:58:33,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:58:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:58:33,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:33,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:33,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:33,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:33,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:33,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:33,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:33,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:33,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:35,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:35,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:35,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:38,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:58:38,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 13:58:38,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 13:58:38,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 13:58:38,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:58:38,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:58:38,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:58:38,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 13:58:38,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:58:38,476 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 13:58:38,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:58:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:58:38,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:38,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:58:38,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:58:38,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:58:38,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:58:38,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:58:38,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:58:38,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:58:38,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:58:38,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:58:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 13:58:38,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041986872] [2020-10-13 13:58:38,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:58:38,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:58:38,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321569264] [2020-10-13 13:58:38,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:58:38,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:58:38,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:58:38,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:58:38,503 INFO L87 Difference]: Start difference. First operand 97253 states and 144227 transitions. Second operand 5 states.