/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_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:12:49,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:12:49,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:12:49,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:12:49,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:12:49,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:12:49,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:12:49,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:12:49,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:12:49,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:12:49,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:12:49,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:12:49,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:12:49,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:12:49,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:12:49,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:12:49,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:12:49,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:12:49,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:12:49,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:12:49,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:12:49,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:12:49,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:12:49,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:12:49,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:12:49,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:12:49,156 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:12:49,161 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:12:49,161 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:12:49,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:12:49,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:12:49,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:12:49,166 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:12:49,167 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:12:49,167 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:12:49,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:12:49,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:12:49,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:12:49,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:12:49,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:12:49,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:12:49,177 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 14:12:49,218 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:12:49,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:12:49,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:12:49,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:12:49,220 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:12:49,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:12:49,220 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:12:49,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:12:49,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:12:49,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:12:49,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:12:49,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:12:49,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:12:49,223 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:12:49,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:12:49,223 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:12:49,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:12:49,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:12:49,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:12:49,224 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:12:49,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:12:49,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:12:49,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:12:49,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:12:49,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:12:49,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:12:49,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:12:49,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:12:49,226 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:12:49,226 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 14:12:49,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:12:49,547 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:12:49,551 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:12:49,552 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:12:49,553 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:12:49,554 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:12:49,618 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44a8dc63d/6f68d0b297a244beb0df5e3a78bf4c7e/FLAG2e8e6f55c [2020-10-13 14:12:50,099 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:12:50,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:12:50,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44a8dc63d/6f68d0b297a244beb0df5e3a78bf4c7e/FLAG2e8e6f55c [2020-10-13 14:12:50,467 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44a8dc63d/6f68d0b297a244beb0df5e3a78bf4c7e [2020-10-13 14:12:50,476 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:12:50,479 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:12:50,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:12:50,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:12:50,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:12:50,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:12:50" (1/1) ... [2020-10-13 14:12:50,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c19b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:12:50, skipping insertion in model container [2020-10-13 14:12:50,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:12:50" (1/1) ... [2020-10-13 14:12:50,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:12:50,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:12:50,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:12:50,914 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:12:50,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:12:51,008 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:12:51,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:12:51 WrapperNode [2020-10-13 14:12:51,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:12:51,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:12:51,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:12:51,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:12:51,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:12:51" (1/1) ... [2020-10-13 14:12:51,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:12:51" (1/1) ... [2020-10-13 14:12:51,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:12:51" (1/1) ... [2020-10-13 14:12:51,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:12:51" (1/1) ... [2020-10-13 14:12:51,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:12:51" (1/1) ... [2020-10-13 14:12:51,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:12:51" (1/1) ... [2020-10-13 14:12:51,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:12:51" (1/1) ... [2020-10-13 14:12:51,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:12:51,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:12:51,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:12:51,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:12:51,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:12:51" (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 14:12:51,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:12:51,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:12:51,129 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:12:51,129 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:12:51,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:12:51,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:12:51,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:12:51,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:12:51,130 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:12:51,130 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:12:51,130 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:12:51,130 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:12:51,130 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:12:51,131 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:12:51,131 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:12:51,131 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:12:51,131 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:12:51,131 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:12:51,131 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:12:51,131 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:12:51,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:12:51,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:12:51,686 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:12:51,686 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:12:51,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:12:51 BoogieIcfgContainer [2020-10-13 14:12:51,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:12:51,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:12:51,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:12:51,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:12:51,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:12:50" (1/3) ... [2020-10-13 14:12:51,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d49b31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:12:51, skipping insertion in model container [2020-10-13 14:12:51,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:12:51" (2/3) ... [2020-10-13 14:12:51,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d49b31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:12:51, skipping insertion in model container [2020-10-13 14:12:51,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:12:51" (3/3) ... [2020-10-13 14:12:51,706 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:12:51,718 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:12:51,730 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:12:51,752 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:12:51,790 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:12:51,790 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:12:51,791 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:12:51,791 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:12:51,791 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:12:51,792 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:12:51,792 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:12:51,792 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:12:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-10-13 14:12:51,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 14:12:51,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:12:51,838 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] [2020-10-13 14:12:51,839 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:12:51,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:12:51,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1223956034, now seen corresponding path program 1 times [2020-10-13 14:12:51,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:12:51,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553873870] [2020-10-13 14:12:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:12:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:52,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:52,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:52,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:52,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:53,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:56,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:56,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 14:12:56,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:12:56,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4775 [2020-10-13 14:12:56,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:56,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:12:56,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 14:12:56,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:12:56,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 14:12:57,169 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 14:12:57,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:12:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:57,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:57,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:57,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:12:57,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:12:57,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:12:57,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:57,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:12:57,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:12:57,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:12:57,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:12:57,223 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 14:12:57,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553873870] [2020-10-13 14:12:57,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:12:57,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:12:57,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246967642] [2020-10-13 14:12:57,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:12:57,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:12:57,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:12:57,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:12:57,259 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 4 states. [2020-10-13 14:12:57,527 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-13 14:12:57,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:12:57,977 INFO L93 Difference]: Finished difference Result 190 states and 299 transitions. [2020-10-13 14:12:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:12:57,979 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-13 14:12:57,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:12:57,994 INFO L225 Difference]: With dead ends: 190 [2020-10-13 14:12:57,994 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 14:12:57,998 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 14:12:58,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 14:12:58,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-10-13 14:12:58,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 14:12:58,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 179 transitions. [2020-10-13 14:12:58,056 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 179 transitions. Word has length 52 [2020-10-13 14:12:58,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:12:58,057 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 179 transitions. [2020-10-13 14:12:58,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:12:58,058 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 179 transitions. [2020-10-13 14:12:58,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 14:12:58,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:12:58,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:12:58,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:12:58,061 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:12:58,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:12:58,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1207914420, now seen corresponding path program 1 times [2020-10-13 14:12:58,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:12:58,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118003963] [2020-10-13 14:12:58,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:12:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:58,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:58,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:58,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:58,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:58,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:59,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:03,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:03,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 14:13:03,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:13:03,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 14:13:03,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:03,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:13:03,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 14:13:03,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:13:03,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:13:03,337 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 14:13:03,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:03,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:03,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:03,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:03,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:03,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:13:03,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:03,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:03,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:03,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:03,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:13:03,374 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 14:13:03,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118003963] [2020-10-13 14:13:03,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:13:03,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:13:03,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719691638] [2020-10-13 14:13:03,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:13:03,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:03,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:13:03,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:13:03,379 INFO L87 Difference]: Start difference. First operand 124 states and 179 transitions. Second operand 4 states. [2020-10-13 14:13:03,590 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-13 14:13:03,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:03,965 INFO L93 Difference]: Finished difference Result 296 states and 451 transitions. [2020-10-13 14:13:03,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:13:03,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-13 14:13:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:03,968 INFO L225 Difference]: With dead ends: 296 [2020-10-13 14:13:03,969 INFO L226 Difference]: Without dead ends: 202 [2020-10-13 14:13:03,970 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 14:13:03,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-13 14:13:03,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2020-10-13 14:13:03,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-13 14:13:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 299 transitions. [2020-10-13 14:13:03,993 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 299 transitions. Word has length 53 [2020-10-13 14:13:03,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:03,994 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 299 transitions. [2020-10-13 14:13:03,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:13:03,995 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 299 transitions. [2020-10-13 14:13:03,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 14:13:03,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:03,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:03,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:13:03,999 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:03,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:03,999 INFO L82 PathProgramCache]: Analyzing trace with hash 792546998, now seen corresponding path program 1 times [2020-10-13 14:13:03,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:04,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066186601] [2020-10-13 14:13:04,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:04,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:04,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:04,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:04,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:04,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:05,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:07,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:07,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 14:13:07,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:13:07,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3916 [2020-10-13 14:13:07,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:07,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:13:07,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:13:07,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:13:07,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:08,111 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 14:13:08,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:08,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:08,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:08,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:08,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:08,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:13:08,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:08,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:08,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:08,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:08,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:08,137 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 14:13:08,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066186601] [2020-10-13 14:13:08,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:13:08,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:13:08,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069237143] [2020-10-13 14:13:08,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:13:08,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:08,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:13:08,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:13:08,142 INFO L87 Difference]: Start difference. First operand 200 states and 299 transitions. Second operand 4 states. [2020-10-13 14:13:08,319 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-13 14:13:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:08,729 INFO L93 Difference]: Finished difference Result 508 states and 785 transitions. [2020-10-13 14:13:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:13:08,730 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-13 14:13:08,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:08,735 INFO L225 Difference]: With dead ends: 508 [2020-10-13 14:13:08,735 INFO L226 Difference]: Without dead ends: 338 [2020-10-13 14:13:08,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:13:08,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-10-13 14:13:08,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 336. [2020-10-13 14:13:08,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-13 14:13:08,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 511 transitions. [2020-10-13 14:13:08,804 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 511 transitions. Word has length 54 [2020-10-13 14:13:08,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:08,805 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 511 transitions. [2020-10-13 14:13:08,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:13:08,805 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 511 transitions. [2020-10-13 14:13:08,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:13:08,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:08,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:08,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:13:08,807 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:08,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:08,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1243428454, now seen corresponding path program 1 times [2020-10-13 14:13:08,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:08,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962507357] [2020-10-13 14:13:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:08,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:08,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:08,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:08,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:09,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:09,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:09,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:13,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:13,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:13:13,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:13:13,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 14:13:13,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:13,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:13:13,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:13:13,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 14:13:13,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:14,095 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 14:13:14,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:14,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:14,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:14,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:14,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:14,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:13:14,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:14,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:14,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:14,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:14,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:14,121 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 14:13:14,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962507357] [2020-10-13 14:13:14,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:13:14,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:13:14,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68851400] [2020-10-13 14:13:14,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:13:14,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:14,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:13:14,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:13:14,126 INFO L87 Difference]: Start difference. First operand 336 states and 511 transitions. Second operand 7 states. [2020-10-13 14:13:14,284 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-13 14:13:15,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:15,058 INFO L93 Difference]: Finished difference Result 2772 states and 4335 transitions. [2020-10-13 14:13:15,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:13:15,059 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-13 14:13:15,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:15,075 INFO L225 Difference]: With dead ends: 2772 [2020-10-13 14:13:15,076 INFO L226 Difference]: Without dead ends: 2466 [2020-10-13 14:13:15,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:13:15,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2020-10-13 14:13:15,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 936. [2020-10-13 14:13:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 936 states. [2020-10-13 14:13:15,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1451 transitions. [2020-10-13 14:13:15,207 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1451 transitions. Word has length 55 [2020-10-13 14:13:15,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:15,208 INFO L479 AbstractCegarLoop]: Abstraction has 936 states and 1451 transitions. [2020-10-13 14:13:15,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:13:15,211 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1451 transitions. [2020-10-13 14:13:15,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:13:15,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:15,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:15,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:13:15,217 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:15,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:15,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1604509247, now seen corresponding path program 1 times [2020-10-13 14:13:15,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:15,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62532706] [2020-10-13 14:13:15,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:15,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:15,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:15,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:15,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:17,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:17,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:13:17,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:13:17,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2478 [2020-10-13 14:13:17,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:17,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:13:17,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:13:17,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 14:13:17,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:17,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:17,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:17,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:17,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:17,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:17,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:13:17,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:17,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:13:17,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:17,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:13:17,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:17,941 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 14:13:17,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62532706] [2020-10-13 14:13:17,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:13:17,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:13:17,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491084609] [2020-10-13 14:13:17,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:13:17,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:17,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:13:17,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:13:17,943 INFO L87 Difference]: Start difference. First operand 936 states and 1451 transitions. Second operand 6 states. [2020-10-13 14:13:18,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:18,453 INFO L93 Difference]: Finished difference Result 2132 states and 3317 transitions. [2020-10-13 14:13:18,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:13:18,454 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-13 14:13:18,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:18,462 INFO L225 Difference]: With dead ends: 2132 [2020-10-13 14:13:18,462 INFO L226 Difference]: Without dead ends: 1526 [2020-10-13 14:13:18,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:13:18,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2020-10-13 14:13:18,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1224. [2020-10-13 14:13:18,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1224 states. [2020-10-13 14:13:18,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1879 transitions. [2020-10-13 14:13:18,557 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1879 transitions. Word has length 55 [2020-10-13 14:13:18,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:18,558 INFO L479 AbstractCegarLoop]: Abstraction has 1224 states and 1879 transitions. [2020-10-13 14:13:18,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:13:18,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1879 transitions. [2020-10-13 14:13:18,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:13:18,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:18,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:18,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:13:18,560 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:18,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:18,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1587467285, now seen corresponding path program 1 times [2020-10-13 14:13:18,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:18,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501502924] [2020-10-13 14:13:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:18,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:18,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:18,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:18,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:20,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:20,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:13:20,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:13:20,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2143 [2020-10-13 14:13:20,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:20,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:13:20,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:13:20,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 14:13:20,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:20,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:20,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:20,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:20,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:20,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:20,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:13:20,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:20,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:20,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:20,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:20,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:20,887 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 14:13:20,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501502924] [2020-10-13 14:13:20,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:13:20,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:13:20,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280552951] [2020-10-13 14:13:20,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:13:20,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:20,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:13:20,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:13:20,890 INFO L87 Difference]: Start difference. First operand 1224 states and 1879 transitions. Second operand 7 states. [2020-10-13 14:13:22,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:22,225 INFO L93 Difference]: Finished difference Result 9731 states and 15038 transitions. [2020-10-13 14:13:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:13:22,226 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-13 14:13:22,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:22,288 INFO L225 Difference]: With dead ends: 9731 [2020-10-13 14:13:22,288 INFO L226 Difference]: Without dead ends: 8537 [2020-10-13 14:13:22,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:13:22,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8537 states. [2020-10-13 14:13:22,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8537 to 2419. [2020-10-13 14:13:22,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2419 states. [2020-10-13 14:13:22,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 3706 transitions. [2020-10-13 14:13:22,731 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 3706 transitions. Word has length 55 [2020-10-13 14:13:22,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:22,732 INFO L479 AbstractCegarLoop]: Abstraction has 2419 states and 3706 transitions. [2020-10-13 14:13:22,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:13:22,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 3706 transitions. [2020-10-13 14:13:22,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:13:22,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:22,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:22,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:13:22,735 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:22,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:22,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1433632006, now seen corresponding path program 1 times [2020-10-13 14:13:22,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:22,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860662697] [2020-10-13 14:13:22,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:22,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:22,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:23,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:23,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:13:23,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:13:23,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 486 [2020-10-13 14:13:23,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:23,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:13:23,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:13:23,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 14:13:23,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:23,417 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 14:13:23,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:23,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:23,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:23,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:23,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:23,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 14:13:23,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:23,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:13:23,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:23,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:13:23,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:13:23,473 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 14:13:23,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860662697] [2020-10-13 14:13:23,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:13:23,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:13:23,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225294786] [2020-10-13 14:13:23,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:13:23,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:23,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:13:23,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:13:23,477 INFO L87 Difference]: Start difference. First operand 2419 states and 3706 transitions. Second operand 6 states. [2020-10-13 14:13:23,658 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-13 14:13:24,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:24,324 INFO L93 Difference]: Finished difference Result 4791 states and 7356 transitions. [2020-10-13 14:13:24,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:13:24,325 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-13 14:13:24,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:24,342 INFO L225 Difference]: With dead ends: 4791 [2020-10-13 14:13:24,342 INFO L226 Difference]: Without dead ends: 2421 [2020-10-13 14:13:24,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:13:24,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2020-10-13 14:13:24,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 2400. [2020-10-13 14:13:24,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2400 states. [2020-10-13 14:13:24,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 3679 transitions. [2020-10-13 14:13:24,567 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 3679 transitions. Word has length 55 [2020-10-13 14:13:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:24,568 INFO L479 AbstractCegarLoop]: Abstraction has 2400 states and 3679 transitions. [2020-10-13 14:13:24,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:13:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 3679 transitions. [2020-10-13 14:13:24,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:13:24,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:24,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:24,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:13:24,570 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:24,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:24,571 INFO L82 PathProgramCache]: Analyzing trace with hash 140437690, now seen corresponding path program 1 times [2020-10-13 14:13:24,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:24,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105052856] [2020-10-13 14:13:24,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:24,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:24,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:25,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:25,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:13:25,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:13:25,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-13 14:13:25,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:25,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:13:25,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 14:13:25,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 14:13:25,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:25,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:25,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:25,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:25,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:25,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:25,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:13:25,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:25,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:13:25,299 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 14:13:25,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105052856] [2020-10-13 14:13:25,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:13:25,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:13:25,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768318675] [2020-10-13 14:13:25,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:13:25,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:25,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:13:25,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:13:25,302 INFO L87 Difference]: Start difference. First operand 2400 states and 3679 transitions. Second operand 7 states. [2020-10-13 14:13:26,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:26,798 INFO L93 Difference]: Finished difference Result 21360 states and 32871 transitions. [2020-10-13 14:13:26,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 14:13:26,799 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-13 14:13:26,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:26,878 INFO L225 Difference]: With dead ends: 21360 [2020-10-13 14:13:26,878 INFO L226 Difference]: Without dead ends: 18990 [2020-10-13 14:13:26,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:13:26,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18990 states. [2020-10-13 14:13:27,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18990 to 4768. [2020-10-13 14:13:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4768 states. [2020-10-13 14:13:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4768 states to 4768 states and 7199 transitions. [2020-10-13 14:13:27,452 INFO L78 Accepts]: Start accepts. Automaton has 4768 states and 7199 transitions. Word has length 55 [2020-10-13 14:13:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:27,453 INFO L479 AbstractCegarLoop]: Abstraction has 4768 states and 7199 transitions. [2020-10-13 14:13:27,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:13:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 4768 states and 7199 transitions. [2020-10-13 14:13:27,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:13:27,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:27,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:27,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:13:27,455 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:27,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:27,455 INFO L82 PathProgramCache]: Analyzing trace with hash 923441237, now seen corresponding path program 1 times [2020-10-13 14:13:27,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:27,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363998756] [2020-10-13 14:13:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:27,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:27,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:27,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:27,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:27,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:27,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:13:27,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:13:27,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-13 14:13:27,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:27,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:13:27,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-13 14:13:27,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:13:27,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:27,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:27,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:27,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:27,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:27,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:27,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:13:27,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:27,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:27,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:27,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:27,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:27,952 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 14:13:27,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363998756] [2020-10-13 14:13:27,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:13:27,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:13:27,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788791518] [2020-10-13 14:13:27,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:13:27,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:27,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:13:27,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:13:27,955 INFO L87 Difference]: Start difference. First operand 4768 states and 7199 transitions. Second operand 4 states. [2020-10-13 14:13:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:28,793 INFO L93 Difference]: Finished difference Result 13412 states and 20065 transitions. [2020-10-13 14:13:28,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:13:28,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-13 14:13:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:28,816 INFO L225 Difference]: With dead ends: 13412 [2020-10-13 14:13:28,816 INFO L226 Difference]: Without dead ends: 8674 [2020-10-13 14:13:28,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:13:28,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8674 states. [2020-10-13 14:13:29,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8674 to 8416. [2020-10-13 14:13:29,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8416 states. [2020-10-13 14:13:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8416 states to 8416 states and 12255 transitions. [2020-10-13 14:13:29,608 INFO L78 Accepts]: Start accepts. Automaton has 8416 states and 12255 transitions. Word has length 57 [2020-10-13 14:13:29,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:29,608 INFO L479 AbstractCegarLoop]: Abstraction has 8416 states and 12255 transitions. [2020-10-13 14:13:29,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:13:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 8416 states and 12255 transitions. [2020-10-13 14:13:29,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:13:29,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:29,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:29,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:13:29,610 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:29,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:29,611 INFO L82 PathProgramCache]: Analyzing trace with hash 943490580, now seen corresponding path program 1 times [2020-10-13 14:13:29,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:29,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354048024] [2020-10-13 14:13:29,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:29,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:29,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:30,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:30,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:13:30,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:13:30,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-13 14:13:30,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:13:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 14:13:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 14:13:30,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:30,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:30,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:30,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:30,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:30,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:30,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:13:30,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:30,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:30,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:30,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:30,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:30,224 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 14:13:30,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354048024] [2020-10-13 14:13:30,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:13:30,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:13:30,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660209375] [2020-10-13 14:13:30,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:13:30,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:30,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:13:30,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:13:30,226 INFO L87 Difference]: Start difference. First operand 8416 states and 12255 transitions. Second operand 7 states. [2020-10-13 14:13:30,406 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:13:32,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:32,920 INFO L93 Difference]: Finished difference Result 41968 states and 61159 transitions. [2020-10-13 14:13:32,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 14:13:32,921 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-13 14:13:32,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:33,119 INFO L225 Difference]: With dead ends: 41968 [2020-10-13 14:13:33,119 INFO L226 Difference]: Without dead ends: 33582 [2020-10-13 14:13:33,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:13:33,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33582 states. [2020-10-13 14:13:34,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33582 to 8416. [2020-10-13 14:13:34,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8416 states. [2020-10-13 14:13:34,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8416 states to 8416 states and 12191 transitions. [2020-10-13 14:13:34,099 INFO L78 Accepts]: Start accepts. Automaton has 8416 states and 12191 transitions. Word has length 57 [2020-10-13 14:13:34,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:34,099 INFO L479 AbstractCegarLoop]: Abstraction has 8416 states and 12191 transitions. [2020-10-13 14:13:34,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:13:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 8416 states and 12191 transitions. [2020-10-13 14:13:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:13:34,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:34,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:34,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:13:34,101 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:34,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1151768945, now seen corresponding path program 1 times [2020-10-13 14:13:34,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:34,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563157547] [2020-10-13 14:13:34,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:34,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:34,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:34,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:34,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:34,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:35,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:37,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:37,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:13:37,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:13:37,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3578 [2020-10-13 14:13:37,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:37,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:13:37,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 14:13:37,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 14:13:37,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:37,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:37,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:37,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:37,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:37,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:37,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:13:37,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:37,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:37,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:37,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:37,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:37,818 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 14:13:37,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563157547] [2020-10-13 14:13:37,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:13:37,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:13:37,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264863859] [2020-10-13 14:13:37,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:13:37,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:37,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:13:37,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:13:37,820 INFO L87 Difference]: Start difference. First operand 8416 states and 12191 transitions. Second operand 5 states. [2020-10-13 14:13:39,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:39,194 INFO L93 Difference]: Finished difference Result 22397 states and 32350 transitions. [2020-10-13 14:13:39,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:13:39,195 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-13 14:13:39,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:39,225 INFO L225 Difference]: With dead ends: 22397 [2020-10-13 14:13:39,226 INFO L226 Difference]: Without dead ends: 14011 [2020-10-13 14:13:39,242 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 14:13:39,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14011 states. [2020-10-13 14:13:39,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14011 to 8421. [2020-10-13 14:13:39,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8421 states. [2020-10-13 14:13:40,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8421 states to 8421 states and 12198 transitions. [2020-10-13 14:13:40,003 INFO L78 Accepts]: Start accepts. Automaton has 8421 states and 12198 transitions. Word has length 58 [2020-10-13 14:13:40,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:40,003 INFO L479 AbstractCegarLoop]: Abstraction has 8421 states and 12198 transitions. [2020-10-13 14:13:40,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:13:40,003 INFO L276 IsEmpty]: Start isEmpty. Operand 8421 states and 12198 transitions. [2020-10-13 14:13:40,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:13:40,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:40,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:40,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:13:40,005 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:40,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:40,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1428472991, now seen corresponding path program 1 times [2020-10-13 14:13:40,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:40,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292739789] [2020-10-13 14:13:40,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:40,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:40,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:40,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:40,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:40,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:13:40,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:13:40,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-13 14:13:40,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:40,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:13:40,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:13:40,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:13:40,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:40,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:40,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:40,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:40,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:40,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:40,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:13:40,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:40,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:40,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:40,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:40,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:40,333 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 14:13:40,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292739789] [2020-10-13 14:13:40,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:13:40,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:13:40,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014385981] [2020-10-13 14:13:40,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:13:40,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:40,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:13:40,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:13:40,335 INFO L87 Difference]: Start difference. First operand 8421 states and 12198 transitions. Second operand 4 states. [2020-10-13 14:13:41,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:41,495 INFO L93 Difference]: Finished difference Result 18859 states and 27338 transitions. [2020-10-13 14:13:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:13:41,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-13 14:13:41,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:41,510 INFO L225 Difference]: With dead ends: 18859 [2020-10-13 14:13:41,510 INFO L226 Difference]: Without dead ends: 10471 [2020-10-13 14:13:41,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:13:41,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10471 states. [2020-10-13 14:13:42,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10471 to 10405. [2020-10-13 14:13:42,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10405 states. [2020-10-13 14:13:42,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10405 states to 10405 states and 14949 transitions. [2020-10-13 14:13:42,853 INFO L78 Accepts]: Start accepts. Automaton has 10405 states and 14949 transitions. Word has length 58 [2020-10-13 14:13:42,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:42,854 INFO L479 AbstractCegarLoop]: Abstraction has 10405 states and 14949 transitions. [2020-10-13 14:13:42,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:13:42,854 INFO L276 IsEmpty]: Start isEmpty. Operand 10405 states and 14949 transitions. [2020-10-13 14:13:42,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:13:42,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:42,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:42,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:13:42,855 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:42,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:42,855 INFO L82 PathProgramCache]: Analyzing trace with hash -818472475, now seen corresponding path program 1 times [2020-10-13 14:13:42,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:42,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675341458] [2020-10-13 14:13:42,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:42,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:42,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:43,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:43,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:13:43,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:13:43,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-13 14:13:43,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:43,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:13:43,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 14:13:43,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:13:43,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:43,217 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 14:13:43,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:43,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:43,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:43,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:43,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:43,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:13:43,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:43,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:43,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:43,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:43,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:43,241 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 14:13:43,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675341458] [2020-10-13 14:13:43,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:13:43,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:13:43,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368511202] [2020-10-13 14:13:43,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:13:43,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:43,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:13:43,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:13:43,249 INFO L87 Difference]: Start difference. First operand 10405 states and 14949 transitions. Second operand 5 states. [2020-10-13 14:13:44,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:44,855 INFO L93 Difference]: Finished difference Result 16857 states and 24258 transitions. [2020-10-13 14:13:44,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:13:44,855 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-13 14:13:44,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:44,882 INFO L225 Difference]: With dead ends: 16857 [2020-10-13 14:13:44,882 INFO L226 Difference]: Without dead ends: 16855 [2020-10-13 14:13:44,888 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 14:13:44,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16855 states. [2020-10-13 14:13:46,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16855 to 10533. [2020-10-13 14:13:46,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10533 states. [2020-10-13 14:13:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10533 states to 10533 states and 14981 transitions. [2020-10-13 14:13:46,027 INFO L78 Accepts]: Start accepts. Automaton has 10533 states and 14981 transitions. Word has length 58 [2020-10-13 14:13:46,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:46,027 INFO L479 AbstractCegarLoop]: Abstraction has 10533 states and 14981 transitions. [2020-10-13 14:13:46,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:13:46,028 INFO L276 IsEmpty]: Start isEmpty. Operand 10533 states and 14981 transitions. [2020-10-13 14:13:46,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 14:13:46,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:46,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:46,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:13:46,029 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:46,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:46,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1726920333, now seen corresponding path program 1 times [2020-10-13 14:13:46,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:46,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775394886] [2020-10-13 14:13:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:46,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:46,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:46,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:46,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:46,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:46,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 14:13:46,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:13:46,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-13 14:13:46,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:46,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:13:46,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:13:46,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:13:46,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:46,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:46,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:46,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:46,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:46,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:46,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:13:46,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:46,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:46,463 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 14:13:46,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775394886] [2020-10-13 14:13:46,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:13:46,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:13:46,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138641325] [2020-10-13 14:13:46,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:13:46,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:46,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:13:46,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:13:46,464 INFO L87 Difference]: Start difference. First operand 10533 states and 14981 transitions. Second operand 4 states. [2020-10-13 14:13:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:48,100 INFO L93 Difference]: Finished difference Result 23273 states and 33287 transitions. [2020-10-13 14:13:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:13:48,101 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-13 14:13:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:48,118 INFO L225 Difference]: With dead ends: 23273 [2020-10-13 14:13:48,118 INFO L226 Difference]: Without dead ends: 14756 [2020-10-13 14:13:48,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:13:48,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14756 states. [2020-10-13 14:13:49,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14756 to 14754. [2020-10-13 14:13:49,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14754 states. [2020-10-13 14:13:49,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14754 states to 14754 states and 20801 transitions. [2020-10-13 14:13:49,461 INFO L78 Accepts]: Start accepts. Automaton has 14754 states and 20801 transitions. Word has length 59 [2020-10-13 14:13:49,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:49,461 INFO L479 AbstractCegarLoop]: Abstraction has 14754 states and 20801 transitions. [2020-10-13 14:13:49,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:13:49,461 INFO L276 IsEmpty]: Start isEmpty. Operand 14754 states and 20801 transitions. [2020-10-13 14:13:49,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 14:13:49,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:49,467 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:49,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:13:49,467 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:49,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:49,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1402187405, now seen corresponding path program 1 times [2020-10-13 14:13:49,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:49,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764653058] [2020-10-13 14:13:49,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:49,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:49,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:49,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:49,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:49,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:50,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:50,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:54,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:54,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 14:13:54,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:13:54,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:13:54,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:54,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:13:54,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 14:13:54,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 14:13:54,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:54,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:54,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:54,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:54,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:54,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:54,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:13:54,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:54,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:54,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:54,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:54,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:13:54,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764653058] [2020-10-13 14:13:54,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:13:54,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:13:54,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995306985] [2020-10-13 14:13:54,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:13:54,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:54,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:13:54,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:13:54,630 INFO L87 Difference]: Start difference. First operand 14754 states and 20801 transitions. Second operand 4 states. [2020-10-13 14:13:56,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:56,198 INFO L93 Difference]: Finished difference Result 27538 states and 38903 transitions. [2020-10-13 14:13:56,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:13:56,199 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-13 14:13:56,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:56,215 INFO L225 Difference]: With dead ends: 27538 [2020-10-13 14:13:56,215 INFO L226 Difference]: Without dead ends: 12816 [2020-10-13 14:13:56,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:13:56,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12816 states. [2020-10-13 14:13:57,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12816 to 12430. [2020-10-13 14:13:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12430 states. [2020-10-13 14:13:57,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12430 states to 12430 states and 17427 transitions. [2020-10-13 14:13:57,250 INFO L78 Accepts]: Start accepts. Automaton has 12430 states and 17427 transitions. Word has length 81 [2020-10-13 14:13:57,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:57,251 INFO L479 AbstractCegarLoop]: Abstraction has 12430 states and 17427 transitions. [2020-10-13 14:13:57,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:13:57,251 INFO L276 IsEmpty]: Start isEmpty. Operand 12430 states and 17427 transitions. [2020-10-13 14:13:57,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:13:57,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:57,254 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:57,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:13:57,254 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:57,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:57,255 INFO L82 PathProgramCache]: Analyzing trace with hash 2079010685, now seen corresponding path program 1 times [2020-10-13 14:13:57,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:57,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140416146] [2020-10-13 14:13:57,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:57,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:57,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:57,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:57,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:57,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:00,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:00,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:00,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:00,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:00,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:00,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:00,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:00,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:01,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:01,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:02,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:02,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:02,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:14:02,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 14:14:02,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:14:02,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:02,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:14:02,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:14:02,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 14:14:02,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:02,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:02,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:02,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:02,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:02,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:02,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:14:02,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:02,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:14:02,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:02,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:14:02,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 14:14:02,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140416146] [2020-10-13 14:14:02,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:02,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:14:02,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011809300] [2020-10-13 14:14:02,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:14:02,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:02,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:14:02,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:14:02,428 INFO L87 Difference]: Start difference. First operand 12430 states and 17427 transitions. Second operand 6 states. [2020-10-13 14:14:02,561 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 14:14:03,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:03,684 INFO L93 Difference]: Finished difference Result 21576 states and 30172 transitions. [2020-10-13 14:14:03,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:14:03,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-13 14:14:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:03,698 INFO L225 Difference]: With dead ends: 21576 [2020-10-13 14:14:03,699 INFO L226 Difference]: Without dead ends: 9210 [2020-10-13 14:14:03,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:14:03,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9210 states. [2020-10-13 14:14:04,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9210 to 6290. [2020-10-13 14:14:04,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6290 states. [2020-10-13 14:14:04,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6290 states to 6290 states and 8790 transitions. [2020-10-13 14:14:04,456 INFO L78 Accepts]: Start accepts. Automaton has 6290 states and 8790 transitions. Word has length 82 [2020-10-13 14:14:04,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:04,457 INFO L479 AbstractCegarLoop]: Abstraction has 6290 states and 8790 transitions. [2020-10-13 14:14:04,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:14:04,457 INFO L276 IsEmpty]: Start isEmpty. Operand 6290 states and 8790 transitions. [2020-10-13 14:14:04,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:14:04,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:04,468 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:04,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:14:04,468 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:04,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:04,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1579394696, now seen corresponding path program 1 times [2020-10-13 14:14:04,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:04,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269727465] [2020-10-13 14:14:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:04,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:04,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:04,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:04,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:04,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:04,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:06,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:06,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:09,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:09,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:14:09,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:14:09,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:14:09,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:09,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:14:09,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:14:09,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 14:14:09,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:09,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:09,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:09,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:09,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:09,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:09,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:14:09,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:09,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:09,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:09,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:09,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:14:09,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269727465] [2020-10-13 14:14:09,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:14:09,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:14:09,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100844836] [2020-10-13 14:14:09,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:14:09,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:09,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:14:09,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:14:09,852 INFO L87 Difference]: Start difference. First operand 6290 states and 8790 transitions. Second operand 9 states. [2020-10-13 14:14:10,018 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:14:15,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:15,066 INFO L93 Difference]: Finished difference Result 32351 states and 44925 transitions. [2020-10-13 14:14:15,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 14:14:15,066 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 82 [2020-10-13 14:14:15,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:15,097 INFO L225 Difference]: With dead ends: 32351 [2020-10-13 14:14:15,097 INFO L226 Difference]: Without dead ends: 26125 [2020-10-13 14:14:15,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-13 14:14:15,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26125 states. [2020-10-13 14:14:16,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26125 to 13181. [2020-10-13 14:14:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13181 states. [2020-10-13 14:14:17,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13181 states to 13181 states and 18353 transitions. [2020-10-13 14:14:17,011 INFO L78 Accepts]: Start accepts. Automaton has 13181 states and 18353 transitions. Word has length 82 [2020-10-13 14:14:17,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:17,011 INFO L479 AbstractCegarLoop]: Abstraction has 13181 states and 18353 transitions. [2020-10-13 14:14:17,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:14:17,011 INFO L276 IsEmpty]: Start isEmpty. Operand 13181 states and 18353 transitions. [2020-10-13 14:14:17,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:14:17,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:17,015 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:17,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:14:17,015 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:17,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:17,015 INFO L82 PathProgramCache]: Analyzing trace with hash 430688876, now seen corresponding path program 1 times [2020-10-13 14:14:17,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:17,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139732626] [2020-10-13 14:14:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:17,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:17,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:17,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:17,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:17,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:17,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:17,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:17,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:17,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:17,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:18,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:18,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:18,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:18,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:18,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:22,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:22,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:14:22,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:14:22,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:14:22,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:22,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:14:22,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:14:22,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 14:14:22,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:22,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:22,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:22,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:22,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:22,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:22,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:14:22,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:22,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:22,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:22,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:22,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:14:22,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139732626] [2020-10-13 14:14:22,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:14:22,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:14:22,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107896813] [2020-10-13 14:14:22,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:14:22,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:22,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:14:22,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:14:22,327 INFO L87 Difference]: Start difference. First operand 13181 states and 18353 transitions. Second operand 12 states. [2020-10-13 14:14:22,582 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:14:31,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:31,165 INFO L93 Difference]: Finished difference Result 55785 states and 76889 transitions. [2020-10-13 14:14:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 14:14:31,166 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-10-13 14:14:31,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:31,213 INFO L225 Difference]: With dead ends: 55785 [2020-10-13 14:14:31,213 INFO L226 Difference]: Without dead ends: 42679 [2020-10-13 14:14:31,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=574, Invalid=2848, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 14:14:31,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42679 states. [2020-10-13 14:14:34,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42679 to 21609. [2020-10-13 14:14:34,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21609 states. [2020-10-13 14:14:34,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21609 states to 21609 states and 29941 transitions. [2020-10-13 14:14:34,430 INFO L78 Accepts]: Start accepts. Automaton has 21609 states and 29941 transitions. Word has length 82 [2020-10-13 14:14:34,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:34,430 INFO L479 AbstractCegarLoop]: Abstraction has 21609 states and 29941 transitions. [2020-10-13 14:14:34,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:14:34,430 INFO L276 IsEmpty]: Start isEmpty. Operand 21609 states and 29941 transitions. [2020-10-13 14:14:34,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:14:34,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:34,433 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:34,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:14:34,433 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:34,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:34,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1368196202, now seen corresponding path program 1 times [2020-10-13 14:14:34,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:34,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192340765] [2020-10-13 14:14:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:34,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:34,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:34,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:34,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:36,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:36,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:37,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:37,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:37,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:37,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:37,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:38,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:38,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:38,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:39,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:39,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:39,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:14:39,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:14:39,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 14:14:39,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:39,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:14:39,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 14:14:39,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 14:14:39,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:39,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:39,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:39,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:39,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:39,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:39,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:14:39,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:39,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:39,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:39,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:39,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 14:14:39,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192340765] [2020-10-13 14:14:39,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:39,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:14:39,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575413674] [2020-10-13 14:14:39,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:14:39,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:39,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:14:39,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:14:39,597 INFO L87 Difference]: Start difference. First operand 21609 states and 29941 transitions. Second operand 4 states. [2020-10-13 14:14:42,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:42,616 INFO L93 Difference]: Finished difference Result 41255 states and 57378 transitions. [2020-10-13 14:14:42,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:14:42,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-13 14:14:42,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:42,639 INFO L225 Difference]: With dead ends: 41255 [2020-10-13 14:14:42,639 INFO L226 Difference]: Without dead ends: 19737 [2020-10-13 14:14:42,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:14:42,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19737 states. [2020-10-13 14:14:46,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19737 to 19737. [2020-10-13 14:14:46,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19737 states. [2020-10-13 14:14:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19737 states to 19737 states and 27215 transitions. [2020-10-13 14:14:46,227 INFO L78 Accepts]: Start accepts. Automaton has 19737 states and 27215 transitions. Word has length 83 [2020-10-13 14:14:46,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:46,228 INFO L479 AbstractCegarLoop]: Abstraction has 19737 states and 27215 transitions. [2020-10-13 14:14:46,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:14:46,228 INFO L276 IsEmpty]: Start isEmpty. Operand 19737 states and 27215 transitions. [2020-10-13 14:14:46,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:14:46,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:46,233 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:46,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:14:46,234 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:46,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:46,234 INFO L82 PathProgramCache]: Analyzing trace with hash 994734282, now seen corresponding path program 1 times [2020-10-13 14:14:46,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:46,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531204042] [2020-10-13 14:14:46,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:46,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:46,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:46,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:46,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:46,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:46,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:46,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:51,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:51,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:14:51,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:14:51,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:14:51,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:51,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:14:51,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:14:51,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 14:14:51,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:51,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:51,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:51,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:51,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:51,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:51,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:14:51,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:51,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:51,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:51,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:51,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:14:51,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531204042] [2020-10-13 14:14:51,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:14:51,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 14:14:51,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584098282] [2020-10-13 14:14:51,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:14:51,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:51,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:14:51,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:14:51,611 INFO L87 Difference]: Start difference. First operand 19737 states and 27215 transitions. Second operand 13 states. [2020-10-13 14:14:51,791 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-13 14:15:00,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:00,280 INFO L93 Difference]: Finished difference Result 50171 states and 68859 transitions. [2020-10-13 14:15:00,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 14:15:00,281 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 83 [2020-10-13 14:15:00,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:00,320 INFO L225 Difference]: With dead ends: 50171 [2020-10-13 14:15:00,320 INFO L226 Difference]: Without dead ends: 38103 [2020-10-13 14:15:00,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=323, Invalid=1237, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 14:15:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38103 states. [2020-10-13 14:15:03,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38103 to 19801. [2020-10-13 14:15:03,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19801 states. [2020-10-13 14:15:03,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19801 states to 19801 states and 27295 transitions. [2020-10-13 14:15:03,363 INFO L78 Accepts]: Start accepts. Automaton has 19801 states and 27295 transitions. Word has length 83 [2020-10-13 14:15:03,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:03,363 INFO L479 AbstractCegarLoop]: Abstraction has 19801 states and 27295 transitions. [2020-10-13 14:15:03,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 14:15:03,363 INFO L276 IsEmpty]: Start isEmpty. Operand 19801 states and 27295 transitions. [2020-10-13 14:15:03,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:15:03,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:03,365 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:15:03,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 14:15:03,365 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:03,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:03,366 INFO L82 PathProgramCache]: Analyzing trace with hash 622208388, now seen corresponding path program 1 times [2020-10-13 14:15:03,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:03,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566037437] [2020-10-13 14:15:03,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:03,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:03,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:03,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:03,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:03,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:03,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:03,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:04,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:04,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:05,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:05,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:05,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:05,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:05,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:05,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:08,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:08,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:15:08,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:15:08,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:15:08,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:08,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:15:08,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:15:08,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 14:15:08,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:08,670 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 32 [2020-10-13 14:15:08,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:08,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:08,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:08,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:08,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:08,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:15:08,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:08,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:08,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:08,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:08,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:15:08,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566037437] [2020-10-13 14:15:08,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:15:08,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:15:08,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960929114] [2020-10-13 14:15:08,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:15:08,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:08,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:15:08,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:15:08,870 INFO L87 Difference]: Start difference. First operand 19801 states and 27295 transitions. Second operand 12 states. [2020-10-13 14:15:09,049 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-13 14:15:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:24,110 INFO L93 Difference]: Finished difference Result 84861 states and 114869 transitions. [2020-10-13 14:15:24,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 14:15:24,111 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-10-13 14:15:24,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:24,180 INFO L225 Difference]: With dead ends: 84861 [2020-10-13 14:15:24,180 INFO L226 Difference]: Without dead ends: 65151 [2020-10-13 14:15:24,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=628, Invalid=3032, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 14:15:24,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65151 states. [2020-10-13 14:15:29,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65151 to 32873. [2020-10-13 14:15:29,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32873 states. [2020-10-13 14:15:29,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32873 states to 32873 states and 45283 transitions. [2020-10-13 14:15:29,609 INFO L78 Accepts]: Start accepts. Automaton has 32873 states and 45283 transitions. Word has length 83 [2020-10-13 14:15:29,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:29,610 INFO L479 AbstractCegarLoop]: Abstraction has 32873 states and 45283 transitions. [2020-10-13 14:15:29,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:15:29,610 INFO L276 IsEmpty]: Start isEmpty. Operand 32873 states and 45283 transitions. [2020-10-13 14:15:29,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:15:29,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:29,612 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:15:29,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 14:15:29,612 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:29,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:29,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2101482977, now seen corresponding path program 1 times [2020-10-13 14:15:29,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:29,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541959860] [2020-10-13 14:15:29,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:29,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:29,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:29,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:29,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:29,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:31,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:31,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:34,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:34,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:15:34,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:15:34,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:15:34,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:34,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 14:15:34,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:15:34,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 14:15:34,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:34,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:34,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:34,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:34,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:34,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:34,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:15:34,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:34,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:34,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:34,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:34,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:15:34,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541959860] [2020-10-13 14:15:34,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:15:34,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 14:15:34,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093596773] [2020-10-13 14:15:34,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 14:15:34,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:34,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 14:15:34,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:15:34,930 INFO L87 Difference]: Start difference. First operand 32873 states and 45283 transitions. Second operand 10 states. [2020-10-13 14:15:40,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:40,996 INFO L93 Difference]: Finished difference Result 59774 states and 82302 transitions. [2020-10-13 14:15:40,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 14:15:40,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2020-10-13 14:15:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:41,029 INFO L225 Difference]: With dead ends: 59774 [2020-10-13 14:15:41,029 INFO L226 Difference]: Without dead ends: 27036 [2020-10-13 14:15:41,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:15:41,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27036 states. [2020-10-13 14:15:44,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27036 to 17935. [2020-10-13 14:15:44,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17935 states. [2020-10-13 14:15:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17935 states to 17935 states and 24938 transitions. [2020-10-13 14:15:44,265 INFO L78 Accepts]: Start accepts. Automaton has 17935 states and 24938 transitions. Word has length 83 [2020-10-13 14:15:44,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:44,266 INFO L479 AbstractCegarLoop]: Abstraction has 17935 states and 24938 transitions. [2020-10-13 14:15:44,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 14:15:44,266 INFO L276 IsEmpty]: Start isEmpty. Operand 17935 states and 24938 transitions. [2020-10-13 14:15:44,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 14:15:44,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:44,267 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] [2020-10-13 14:15:44,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 14:15:44,267 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:44,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:44,268 INFO L82 PathProgramCache]: Analyzing trace with hash 368368534, now seen corresponding path program 1 times [2020-10-13 14:15:44,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:44,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578822918] [2020-10-13 14:15:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:44,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:44,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:44,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:44,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:44,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:47,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:47,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:47,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:49,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:49,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 14:15:49,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:15:49,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:15:49,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:15:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 14:15:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:15:49,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:49,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:49,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:49,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:49,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:49,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:49,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:15:49,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:49,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:49,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:49,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:49,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:15:49,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578822918] [2020-10-13 14:15:49,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:15:49,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:15:49,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478051867] [2020-10-13 14:15:49,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:15:49,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:49,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:15:49,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:15:49,430 INFO L87 Difference]: Start difference. First operand 17935 states and 24938 transitions. Second operand 4 states. [2020-10-13 14:15:51,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:51,348 INFO L93 Difference]: Finished difference Result 26842 states and 37259 transitions. [2020-10-13 14:15:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:15:51,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-13 14:15:51,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:51,359 INFO L225 Difference]: With dead ends: 26842 [2020-10-13 14:15:51,359 INFO L226 Difference]: Without dead ends: 9056 [2020-10-13 14:15:51,373 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 14:15:51,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9056 states. [2020-10-13 14:15:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9056 to 8984. [2020-10-13 14:15:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8984 states. [2020-10-13 14:15:52,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8984 states to 8984 states and 12295 transitions. [2020-10-13 14:15:52,906 INFO L78 Accepts]: Start accepts. Automaton has 8984 states and 12295 transitions. Word has length 84 [2020-10-13 14:15:52,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:52,906 INFO L479 AbstractCegarLoop]: Abstraction has 8984 states and 12295 transitions. [2020-10-13 14:15:52,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:15:52,906 INFO L276 IsEmpty]: Start isEmpty. Operand 8984 states and 12295 transitions. [2020-10-13 14:15:52,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 14:15:52,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:52,907 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:15:52,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 14:15:52,908 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:52,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:52,908 INFO L82 PathProgramCache]: Analyzing trace with hash -821075242, now seen corresponding path program 1 times [2020-10-13 14:15:52,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:52,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619966559] [2020-10-13 14:15:52,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:52,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:52,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:53,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:53,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:54,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:54,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:54,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:54,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:57,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:57,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 14:15:57,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:15:57,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 14:15:57,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:57,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:15:57,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:15:57,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 14:15:57,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:58,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:58,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:58,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:58,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:58,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:58,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:15:58,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:58,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:58,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:58,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:58,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:15:58,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619966559] [2020-10-13 14:15:58,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:15:58,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 14:15:58,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855818747] [2020-10-13 14:15:58,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:15:58,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:58,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:15:58,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:15:58,347 INFO L87 Difference]: Start difference. First operand 8984 states and 12295 transitions. Second operand 13 states. [2020-10-13 14:16:01,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:16:01,776 INFO L93 Difference]: Finished difference Result 21943 states and 29917 transitions. [2020-10-13 14:16:01,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 14:16:01,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 84 [2020-10-13 14:16:01,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:16:01,792 INFO L225 Difference]: With dead ends: 21943 [2020-10-13 14:16:01,793 INFO L226 Difference]: Without dead ends: 13108 [2020-10-13 14:16:01,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-13 14:16:01,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13108 states. [2020-10-13 14:16:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13108 to 8982. [2020-10-13 14:16:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8982 states. [2020-10-13 14:16:03,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8982 states to 8982 states and 12293 transitions. [2020-10-13 14:16:03,431 INFO L78 Accepts]: Start accepts. Automaton has 8982 states and 12293 transitions. Word has length 84 [2020-10-13 14:16:03,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:16:03,432 INFO L479 AbstractCegarLoop]: Abstraction has 8982 states and 12293 transitions. [2020-10-13 14:16:03,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 14:16:03,432 INFO L276 IsEmpty]: Start isEmpty. Operand 8982 states and 12293 transitions. [2020-10-13 14:16:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 14:16:03,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:16:03,433 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:16:03,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 14:16:03,433 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:16:03,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:16:03,433 INFO L82 PathProgramCache]: Analyzing trace with hash -623408519, now seen corresponding path program 1 times [2020-10-13 14:16:03,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:16:03,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087867854] [2020-10-13 14:16:03,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:16:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:16:03,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:03,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:03,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:03,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:04,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:04,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:04,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:05,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:05,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:05,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:05,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:06,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:06,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:06,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:08,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:08,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:16:08,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 14:16:08,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:16:08,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:16:08,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:16:08,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:16:08,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 14:16:08,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 14:16:08,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:16:08,711 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 27 [2020-10-13 14:16:08,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:16:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:16:08,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:08,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:16:08,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:16:08,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:16:08,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:16:08,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:16:08,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:16:08,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:16:08,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:16:08,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:16:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:16:08,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087867854] [2020-10-13 14:16:08,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:16:08,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:16:08,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236364393] [2020-10-13 14:16:08,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:16:08,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:16:08,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:16:08,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:16:08,905 INFO L87 Difference]: Start difference. First operand 8982 states and 12293 transitions. Second operand 12 states. [2020-10-13 14:16:09,296 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 125 [2020-10-13 14:16:12,441 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-10-13 14:16:19,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:16:19,958 INFO L93 Difference]: Finished difference Result 45052 states and 60727 transitions. [2020-10-13 14:16:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 14:16:19,958 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 84 [2020-10-13 14:16:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:16:19,999 INFO L225 Difference]: With dead ends: 45052 [2020-10-13 14:16:19,999 INFO L226 Difference]: Without dead ends: 36217 [2020-10-13 14:16:20,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=467, Invalid=2289, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 14:16:20,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36217 states. [2020-10-13 14:16:23,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36217 to 19355. [2020-10-13 14:16:23,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19355 states. [2020-10-13 14:16:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19355 states to 19355 states and 26459 transitions. [2020-10-13 14:16:23,876 INFO L78 Accepts]: Start accepts. Automaton has 19355 states and 26459 transitions. Word has length 84 [2020-10-13 14:16:23,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:16:23,876 INFO L479 AbstractCegarLoop]: Abstraction has 19355 states and 26459 transitions. [2020-10-13 14:16:23,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:16:23,876 INFO L276 IsEmpty]: Start isEmpty. Operand 19355 states and 26459 transitions. [2020-10-13 14:16:23,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 14:16:23,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:16:23,878 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:16:23,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 14:16:23,878 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:16:23,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:16:23,878 INFO L82 PathProgramCache]: Analyzing trace with hash -599663297, now seen corresponding path program 1 times [2020-10-13 14:16:23,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:16:23,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608659597] [2020-10-13 14:16:23,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:16:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:16:23,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:23,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:23,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:24,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:24,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:24,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:25,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:28,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:16:28,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 14:16:28,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:16:28,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:16:28,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:16:28,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:16:28,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 14:16:28,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 14:16:28,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:16:29,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:16:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:16:29,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:29,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:16:29,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:16:29,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:16:29,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:16:29,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:16:29,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:16:29,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:16:29,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:16:29,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:16:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:16:29,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608659597] [2020-10-13 14:16:29,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:16:29,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 14:16:29,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57640475] [2020-10-13 14:16:29,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:16:29,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:16:29,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:16:29,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:16:29,287 INFO L87 Difference]: Start difference. First operand 19355 states and 26459 transitions. Second operand 13 states. [2020-10-13 14:16:29,463 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:16:37,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:16:37,595 INFO L93 Difference]: Finished difference Result 38853 states and 52570 transitions. [2020-10-13 14:16:37,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 14:16:37,596 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 84 [2020-10-13 14:16:37,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:16:37,622 INFO L225 Difference]: With dead ends: 38853 [2020-10-13 14:16:37,622 INFO L226 Difference]: Without dead ends: 27323 [2020-10-13 14:16:37,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=228, Invalid=828, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:16:37,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27323 states.