/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 03:15:27,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 03:15:27,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 03:15:27,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 03:15:27,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 03:15:27,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 03:15:27,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 03:15:27,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 03:15:27,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 03:15:27,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 03:15:27,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 03:15:27,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 03:15:27,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 03:15:27,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 03:15:27,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 03:15:27,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 03:15:27,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 03:15:27,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 03:15:27,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 03:15:27,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 03:15:27,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 03:15:27,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 03:15:27,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 03:15:27,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 03:15:27,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 03:15:27,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 03:15:27,930 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 03:15:27,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 03:15:27,931 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 03:15:27,932 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 03:15:27,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 03:15:27,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 03:15:27,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 03:15:27,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 03:15:27,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 03:15:27,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 03:15:27,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 03:15:27,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 03:15:27,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 03:15:27,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 03:15:27,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 03:15:27,948 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 [2020-10-15 03:15:27,996 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 03:15:27,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 03:15:27,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 03:15:27,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 03:15:27,998 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 03:15:27,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 03:15:27,998 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 03:15:27,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 03:15:27,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 03:15:27,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 03:15:27,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 03:15:27,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 03:15:28,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 03:15:28,000 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 03:15:28,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 03:15:28,000 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 03:15:28,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 03:15:28,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 03:15:28,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 03:15:28,001 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 03:15:28,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 03:15:28,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 03:15:28,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 03:15:28,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 03:15:28,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 03:15:28,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 03:15:28,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 03:15:28,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 03:15:28,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 03:15:28,003 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 03:15:28,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 03:15:28,358 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 03:15:28,361 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 03:15:28,363 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 03:15:28,364 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 03:15:28,364 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-15 03:15:28,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37c3ff671/dca59916ab9445ddbf977f4ab260a9db/FLAG089e96150 [2020-10-15 03:15:28,980 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 03:15:28,981 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-15 03:15:29,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37c3ff671/dca59916ab9445ddbf977f4ab260a9db/FLAG089e96150 [2020-10-15 03:15:29,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37c3ff671/dca59916ab9445ddbf977f4ab260a9db [2020-10-15 03:15:29,326 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 03:15:29,328 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 03:15:29,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 03:15:29,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 03:15:29,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 03:15:29,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:15:29" (1/1) ... [2020-10-15 03:15:29,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@236d82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:29, skipping insertion in model container [2020-10-15 03:15:29,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:15:29" (1/1) ... [2020-10-15 03:15:29,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 03:15:29,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 03:15:29,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:15:29,686 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 03:15:29,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:15:29,883 INFO L208 MainTranslator]: Completed translation [2020-10-15 03:15:29,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:29 WrapperNode [2020-10-15 03:15:29,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 03:15:29,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 03:15:29,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 03:15:29,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 03:15:29,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:29" (1/1) ... [2020-10-15 03:15:29,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:29" (1/1) ... [2020-10-15 03:15:29,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:29" (1/1) ... [2020-10-15 03:15:29,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:29" (1/1) ... [2020-10-15 03:15:29,923 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:29" (1/1) ... [2020-10-15 03:15:29,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:29" (1/1) ... [2020-10-15 03:15:29,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:29" (1/1) ... [2020-10-15 03:15:29,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 03:15:29,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 03:15:29,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 03:15:29,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 03:15:29,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:29" (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 [2020-10-15 03:15:30,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 03:15:30,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 03:15:30,009 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-15 03:15:30,009 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 03:15:30,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 03:15:30,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-15 03:15:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-15 03:15:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-15 03:15:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-15 03:15:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-15 03:15:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-15 03:15:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-15 03:15:30,011 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-15 03:15:30,011 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-15 03:15:30,011 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-15 03:15:30,011 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-15 03:15:30,011 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-15 03:15:30,011 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-15 03:15:30,012 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 03:15:30,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 03:15:30,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 03:15:30,557 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 03:15:30,557 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-15 03:15:30,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:15:30 BoogieIcfgContainer [2020-10-15 03:15:30,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 03:15:30,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 03:15:30,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 03:15:30,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 03:15:30,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:15:29" (1/3) ... [2020-10-15 03:15:30,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@844790c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:15:30, skipping insertion in model container [2020-10-15 03:15:30,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:15:29" (2/3) ... [2020-10-15 03:15:30,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@844790c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:15:30, skipping insertion in model container [2020-10-15 03:15:30,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:15:30" (3/3) ... [2020-10-15 03:15:30,576 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-15 03:15:30,587 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 03:15:30,600 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 03:15:30,613 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 03:15:30,642 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 03:15:30,642 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 03:15:30,642 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 03:15:30,642 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 03:15:30,643 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 03:15:30,643 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 03:15:30,643 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 03:15:30,643 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 03:15:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states. [2020-10-15 03:15:30,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-15 03:15:30,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:30,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:30,676 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:30,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:30,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1464413452, now seen corresponding path program 1 times [2020-10-15 03:15:30,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:30,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063503749] [2020-10-15 03:15:30,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:31,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:31,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:31,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:31,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:33,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:33,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-15 03:15:33,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:15:33,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2287 [2020-10-15 03:15:33,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:33,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:33,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:15:33,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:15:33,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-15 03:15:33,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 03:15:33,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:33,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:33,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:33,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:33,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:33,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:15:33,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:33,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:33,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:15:33,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:33,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:15:33,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:33,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063503749] [2020-10-15 03:15:33,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:33,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:15:33,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001013797] [2020-10-15 03:15:33,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:15:33,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:33,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:15:33,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:15:33,480 INFO L87 Difference]: Start difference. First operand 69 states. Second operand 6 states. [2020-10-15 03:15:33,779 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-15 03:15:34,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:34,416 INFO L93 Difference]: Finished difference Result 337 states and 524 transitions. [2020-10-15 03:15:34,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:15:34,418 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-15 03:15:34,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:34,435 INFO L225 Difference]: With dead ends: 337 [2020-10-15 03:15:34,435 INFO L226 Difference]: Without dead ends: 275 [2020-10-15 03:15:34,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:15:34,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-15 03:15:34,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 105. [2020-10-15 03:15:34,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 03:15:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 152 transitions. [2020-10-15 03:15:34,507 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 152 transitions. Word has length 41 [2020-10-15 03:15:34,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:34,508 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 152 transitions. [2020-10-15 03:15:34,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:15:34,508 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 152 transitions. [2020-10-15 03:15:34,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-15 03:15:34,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:34,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:34,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 03:15:34,511 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:34,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:34,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1678334049, now seen corresponding path program 1 times [2020-10-15 03:15:34,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:34,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812103791] [2020-10-15 03:15:34,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:34,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:34,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:34,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:34,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:34,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:34,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:36,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:39,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:39,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-15 03:15:39,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:15:39,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4716 [2020-10-15 03:15:39,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:39,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:39,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:15:39,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:15:39,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 03:15:39,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:39,438 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-15 03:15:39,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:39,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:39,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:39,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:39,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:39,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-15 03:15:39,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:39,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:39,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:15:39,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:39,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:15:39,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:39,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812103791] [2020-10-15 03:15:39,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:39,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:15:39,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513304918] [2020-10-15 03:15:39,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:15:39,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:39,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:15:39,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:15:39,475 INFO L87 Difference]: Start difference. First operand 105 states and 152 transitions. Second operand 6 states. [2020-10-15 03:15:39,666 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-15 03:15:40,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:40,106 INFO L93 Difference]: Finished difference Result 461 states and 708 transitions. [2020-10-15 03:15:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:15:40,107 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-15 03:15:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:40,110 INFO L225 Difference]: With dead ends: 461 [2020-10-15 03:15:40,111 INFO L226 Difference]: Without dead ends: 379 [2020-10-15 03:15:40,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:15:40,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-15 03:15:40,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 221. [2020-10-15 03:15:40,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-15 03:15:40,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 335 transitions. [2020-10-15 03:15:40,140 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 335 transitions. Word has length 43 [2020-10-15 03:15:40,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:40,141 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 335 transitions. [2020-10-15 03:15:40,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:15:40,141 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 335 transitions. [2020-10-15 03:15:40,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-15 03:15:40,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:40,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:40,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 03:15:40,144 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:40,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:40,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1654588827, now seen corresponding path program 1 times [2020-10-15 03:15:40,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:40,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392410508] [2020-10-15 03:15:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:40,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:40,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:40,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:40,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:40,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:40,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:41,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:43,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:43,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-15 03:15:43,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:15:43,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3297 [2020-10-15 03:15:43,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:43,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:43,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:15:43,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:15:43,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 03:15:43,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:43,746 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-15 03:15:43,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:43,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:43,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:43,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:43,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:43,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:15:43,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:43,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:43,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:15:43,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:43,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:15:43,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:43,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392410508] [2020-10-15 03:15:43,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:43,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:15:43,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091404823] [2020-10-15 03:15:43,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:15:43,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:43,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:15:43,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:15:43,779 INFO L87 Difference]: Start difference. First operand 221 states and 335 transitions. Second operand 6 states. [2020-10-15 03:15:44,031 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-15 03:15:44,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:44,413 INFO L93 Difference]: Finished difference Result 599 states and 921 transitions. [2020-10-15 03:15:44,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:15:44,414 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-15 03:15:44,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:44,417 INFO L225 Difference]: With dead ends: 599 [2020-10-15 03:15:44,417 INFO L226 Difference]: Without dead ends: 481 [2020-10-15 03:15:44,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:15:44,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-10-15 03:15:44,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 341. [2020-10-15 03:15:44,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-15 03:15:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 525 transitions. [2020-10-15 03:15:44,450 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 525 transitions. Word has length 43 [2020-10-15 03:15:44,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:44,450 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 525 transitions. [2020-10-15 03:15:44,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:15:44,451 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 525 transitions. [2020-10-15 03:15:44,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-15 03:15:44,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:44,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:44,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 03:15:44,453 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:44,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:44,454 INFO L82 PathProgramCache]: Analyzing trace with hash 574801294, now seen corresponding path program 1 times [2020-10-15 03:15:44,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:44,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129480010] [2020-10-15 03:15:44,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:44,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:44,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:44,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:44,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:45,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:45,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-15 03:15:45,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:15:45,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1149 [2020-10-15 03:15:45,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:45,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:45,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:15:45,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:15:45,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 03:15:45,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-15 03:15:45,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:45,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:45,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:45,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:45,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:45,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-15 03:15:45,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:45,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:45,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:15:45,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:45,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:15:45,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:45,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129480010] [2020-10-15 03:15:45,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:45,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:15:45,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526568058] [2020-10-15 03:15:45,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:15:45,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:45,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:15:45,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:15:45,832 INFO L87 Difference]: Start difference. First operand 341 states and 525 transitions. Second operand 6 states. [2020-10-15 03:15:46,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:46,264 INFO L93 Difference]: Finished difference Result 969 states and 1513 transitions. [2020-10-15 03:15:46,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:15:46,265 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-15 03:15:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:46,271 INFO L225 Difference]: With dead ends: 969 [2020-10-15 03:15:46,272 INFO L226 Difference]: Without dead ends: 651 [2020-10-15 03:15:46,277 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 [2020-10-15 03:15:46,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2020-10-15 03:15:46,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 649. [2020-10-15 03:15:46,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-10-15 03:15:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1002 transitions. [2020-10-15 03:15:46,348 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1002 transitions. Word has length 43 [2020-10-15 03:15:46,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:46,349 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 1002 transitions. [2020-10-15 03:15:46,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:15:46,349 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1002 transitions. [2020-10-15 03:15:46,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-15 03:15:46,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:46,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:46,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 03:15:46,364 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:46,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:46,365 INFO L82 PathProgramCache]: Analyzing trace with hash -872228301, now seen corresponding path program 1 times [2020-10-15 03:15:46,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:46,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701078211] [2020-10-15 03:15:46,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:46,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:46,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:46,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:46,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:46,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-15 03:15:46,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:15:46,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-15 03:15:46,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:46,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:46,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:15:46,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:15:46,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 03:15:46,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:46,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:46,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:46,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:46,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:46,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:46,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:15:46,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:46,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:46,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:15:46,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:46,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:15:46,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:46,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701078211] [2020-10-15 03:15:46,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:46,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:15:46,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323924633] [2020-10-15 03:15:46,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:15:46,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:46,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:15:46,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:15:46,922 INFO L87 Difference]: Start difference. First operand 649 states and 1002 transitions. Second operand 6 states. [2020-10-15 03:15:47,066 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-15 03:15:47,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:47,469 INFO L93 Difference]: Finished difference Result 1514 states and 2345 transitions. [2020-10-15 03:15:47,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:15:47,469 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-15 03:15:47,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:47,475 INFO L225 Difference]: With dead ends: 1514 [2020-10-15 03:15:47,475 INFO L226 Difference]: Without dead ends: 888 [2020-10-15 03:15:47,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:15:47,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2020-10-15 03:15:47,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 649. [2020-10-15 03:15:47,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-10-15 03:15:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 994 transitions. [2020-10-15 03:15:47,532 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 994 transitions. Word has length 43 [2020-10-15 03:15:47,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:47,533 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 994 transitions. [2020-10-15 03:15:47,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:15:47,533 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 994 transitions. [2020-10-15 03:15:47,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-15 03:15:47,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:47,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:47,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 03:15:47,535 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:47,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:47,535 INFO L82 PathProgramCache]: Analyzing trace with hash -892277644, now seen corresponding path program 1 times [2020-10-15 03:15:47,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:47,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767409437] [2020-10-15 03:15:47,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:47,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:47,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:47,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:47,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:47,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:47,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:47,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-15 03:15:47,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:15:47,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-15 03:15:47,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:47,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:47,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:15:47,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:15:47,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-15 03:15:47,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:48,224 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-15 03:15:48,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:48,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:48,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:48,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:48,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:48,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:15:48,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:48,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:15:48,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:48,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:15:48,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:48,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767409437] [2020-10-15 03:15:48,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:48,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:15:48,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387098777] [2020-10-15 03:15:48,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:15:48,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:48,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:15:48,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:15:48,254 INFO L87 Difference]: Start difference. First operand 649 states and 994 transitions. Second operand 4 states. [2020-10-15 03:15:48,379 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-15 03:15:48,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:48,742 INFO L93 Difference]: Finished difference Result 1551 states and 2383 transitions. [2020-10-15 03:15:48,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:15:48,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-15 03:15:48,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:48,748 INFO L225 Difference]: With dead ends: 1551 [2020-10-15 03:15:48,749 INFO L226 Difference]: Without dead ends: 925 [2020-10-15 03:15:48,750 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 [2020-10-15 03:15:48,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2020-10-15 03:15:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 915. [2020-10-15 03:15:48,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 915 states. [2020-10-15 03:15:48,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1384 transitions. [2020-10-15 03:15:48,844 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1384 transitions. Word has length 43 [2020-10-15 03:15:48,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:48,844 INFO L479 AbstractCegarLoop]: Abstraction has 915 states and 1384 transitions. [2020-10-15 03:15:48,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:15:48,844 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1384 transitions. [2020-10-15 03:15:48,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 03:15:48,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:48,846 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] [2020-10-15 03:15:48,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 03:15:48,846 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:48,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:48,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1619902795, now seen corresponding path program 1 times [2020-10-15 03:15:48,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:48,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288179883] [2020-10-15 03:15:48,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:48,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:48,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:48,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:49,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:49,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:49,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:49,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:49,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 03:15:49,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 03:15:49,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 783 [2020-10-15 03:15:49,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:49,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:49,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:15:49,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:15:49,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-15 03:15:49,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:49,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:49,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:49,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:49,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:49,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:49,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:15:49,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:49,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:49,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:15:49,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:49,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:15:49,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:49,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288179883] [2020-10-15 03:15:49,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:49,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:15:49,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105789480] [2020-10-15 03:15:49,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:15:49,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:49,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:15:49,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:15:49,806 INFO L87 Difference]: Start difference. First operand 915 states and 1384 transitions. Second operand 5 states. [2020-10-15 03:15:50,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:50,385 INFO L93 Difference]: Finished difference Result 2133 states and 3255 transitions. [2020-10-15 03:15:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:15:50,385 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-10-15 03:15:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:50,394 INFO L225 Difference]: With dead ends: 2133 [2020-10-15 03:15:50,394 INFO L226 Difference]: Without dead ends: 1507 [2020-10-15 03:15:50,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:15:50,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2020-10-15 03:15:50,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1487. [2020-10-15 03:15:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1487 states. [2020-10-15 03:15:50,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 2228 transitions. [2020-10-15 03:15:50,556 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 2228 transitions. Word has length 44 [2020-10-15 03:15:50,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:50,557 INFO L479 AbstractCegarLoop]: Abstraction has 1487 states and 2228 transitions. [2020-10-15 03:15:50,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:15:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 2228 transitions. [2020-10-15 03:15:50,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 03:15:50,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:50,559 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] [2020-10-15 03:15:50,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 03:15:50,559 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:50,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:50,560 INFO L82 PathProgramCache]: Analyzing trace with hash 69452607, now seen corresponding path program 1 times [2020-10-15 03:15:50,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:50,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879691473] [2020-10-15 03:15:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:50,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:50,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:50,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:50,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:50,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:51,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:53,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:53,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 03:15:53,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 03:15:53,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2522 [2020-10-15 03:15:53,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:53,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:53,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:15:53,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 03:15:53,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 03:15:53,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:53,287 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-15 03:15:53,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:53,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:53,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:53,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:53,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:53,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:15:53,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:53,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:53,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:15:53,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:53,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:15:53,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 03:15:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:53,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879691473] [2020-10-15 03:15:53,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:53,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:15:53,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969397472] [2020-10-15 03:15:53,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:15:53,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:53,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:15:53,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:15:53,329 INFO L87 Difference]: Start difference. First operand 1487 states and 2228 transitions. Second operand 6 states. [2020-10-15 03:15:53,503 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-15 03:15:54,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:54,107 INFO L93 Difference]: Finished difference Result 2605 states and 3920 transitions. [2020-10-15 03:15:54,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:15:54,108 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-15 03:15:54,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:54,119 INFO L225 Difference]: With dead ends: 2605 [2020-10-15 03:15:54,119 INFO L226 Difference]: Without dead ends: 2276 [2020-10-15 03:15:54,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:15:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2020-10-15 03:15:54,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 1713. [2020-10-15 03:15:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1713 states. [2020-10-15 03:15:54,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 2573 transitions. [2020-10-15 03:15:54,291 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 2573 transitions. Word has length 44 [2020-10-15 03:15:54,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:54,293 INFO L479 AbstractCegarLoop]: Abstraction has 1713 states and 2573 transitions. [2020-10-15 03:15:54,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:15:54,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 2573 transitions. [2020-10-15 03:15:54,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 03:15:54,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:54,294 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] [2020-10-15 03:15:54,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 03:15:54,295 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:54,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:54,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1271182972, now seen corresponding path program 1 times [2020-10-15 03:15:54,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:54,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955982473] [2020-10-15 03:15:54,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:54,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:54,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:54,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:54,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:54,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 03:15:54,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:15:54,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-15 03:15:54,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:54,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:54,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:15:54,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-15 03:15:54,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 03:15:54,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:54,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:54,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:54,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:54,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:54,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:54,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:15:54,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:54,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:54,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:15:54,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:54,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:15:54,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:15:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:54,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955982473] [2020-10-15 03:15:54,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:54,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:15:54,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255447993] [2020-10-15 03:15:54,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:15:54,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:54,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:15:54,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:15:54,749 INFO L87 Difference]: Start difference. First operand 1713 states and 2573 transitions. Second operand 4 states. [2020-10-15 03:15:55,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:55,332 INFO L93 Difference]: Finished difference Result 4725 states and 7075 transitions. [2020-10-15 03:15:55,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:15:55,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-15 03:15:55,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:55,348 INFO L225 Difference]: With dead ends: 4725 [2020-10-15 03:15:55,348 INFO L226 Difference]: Without dead ends: 3035 [2020-10-15 03:15:55,353 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 [2020-10-15 03:15:55,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2020-10-15 03:15:55,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 3033. [2020-10-15 03:15:55,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3033 states. [2020-10-15 03:15:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3033 states to 3033 states and 4478 transitions. [2020-10-15 03:15:55,614 INFO L78 Accepts]: Start accepts. Automaton has 3033 states and 4478 transitions. Word has length 44 [2020-10-15 03:15:55,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:55,614 INFO L479 AbstractCegarLoop]: Abstraction has 3033 states and 4478 transitions. [2020-10-15 03:15:55,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:15:55,614 INFO L276 IsEmpty]: Start isEmpty. Operand 3033 states and 4478 transitions. [2020-10-15 03:15:55,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-15 03:15:55,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:55,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:55,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 03:15:55,616 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:55,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:55,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1167189470, now seen corresponding path program 1 times [2020-10-15 03:15:55,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:55,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030475969] [2020-10-15 03:15:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:55,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:55,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:55,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:55,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-15 03:15:55,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:15:55,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-15 03:15:55,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:55,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:55,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:15:55,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-15 03:15:55,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-15 03:15:55,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:15:55,987 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-15 03:15:55,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:55,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:55,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:55,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:55,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:56,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:15:56,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:56,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:56,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:15:56,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:56,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:15:56,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 03:15:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:56,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030475969] [2020-10-15 03:15:56,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:56,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:15:56,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333475478] [2020-10-15 03:15:56,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:15:56,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:56,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:15:56,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:15:56,015 INFO L87 Difference]: Start difference. First operand 3033 states and 4478 transitions. Second operand 4 states. [2020-10-15 03:15:56,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:56,792 INFO L93 Difference]: Finished difference Result 8317 states and 12192 transitions. [2020-10-15 03:15:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:15:56,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-15 03:15:56,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:56,819 INFO L225 Difference]: With dead ends: 8317 [2020-10-15 03:15:56,819 INFO L226 Difference]: Without dead ends: 5307 [2020-10-15 03:15:56,827 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 [2020-10-15 03:15:56,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5307 states. [2020-10-15 03:15:57,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5307 to 5305. [2020-10-15 03:15:57,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5305 states. [2020-10-15 03:15:57,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5305 states to 5305 states and 7644 transitions. [2020-10-15 03:15:57,307 INFO L78 Accepts]: Start accepts. Automaton has 5305 states and 7644 transitions. Word has length 45 [2020-10-15 03:15:57,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:57,307 INFO L479 AbstractCegarLoop]: Abstraction has 5305 states and 7644 transitions. [2020-10-15 03:15:57,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:15:57,307 INFO L276 IsEmpty]: Start isEmpty. Operand 5305 states and 7644 transitions. [2020-10-15 03:15:57,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 03:15:57,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:57,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:57,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 03:15:57,309 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:57,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:57,310 INFO L82 PathProgramCache]: Analyzing trace with hash 804903568, now seen corresponding path program 1 times [2020-10-15 03:15:57,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:57,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004621969] [2020-10-15 03:15:57,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:57,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:57,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:57,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:57,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 03:15:57,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:15:57,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-15 03:15:57,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:57,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:57,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:15:57,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:15:57,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-15 03:15:57,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:15:57,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:15:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:57,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:57,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:57,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:15:57,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:57,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:15:57,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:57,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:57,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:15:57,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:15:57,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:15:57,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:15:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:15:57,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004621969] [2020-10-15 03:15:57,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:15:57,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:15:57,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386379783] [2020-10-15 03:15:57,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:15:57,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:15:57,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:15:57,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:15:57,688 INFO L87 Difference]: Start difference. First operand 5305 states and 7644 transitions. Second operand 6 states. [2020-10-15 03:15:58,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:15:58,934 INFO L93 Difference]: Finished difference Result 15777 states and 22702 transitions. [2020-10-15 03:15:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:15:58,934 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-15 03:15:58,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:15:58,991 INFO L225 Difference]: With dead ends: 15777 [2020-10-15 03:15:58,992 INFO L226 Difference]: Without dead ends: 10495 [2020-10-15 03:15:59,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:15:59,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2020-10-15 03:15:59,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 10493. [2020-10-15 03:15:59,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10493 states. [2020-10-15 03:15:59,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10493 states to 10493 states and 14988 transitions. [2020-10-15 03:15:59,886 INFO L78 Accepts]: Start accepts. Automaton has 10493 states and 14988 transitions. Word has length 46 [2020-10-15 03:15:59,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:15:59,886 INFO L479 AbstractCegarLoop]: Abstraction has 10493 states and 14988 transitions. [2020-10-15 03:15:59,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:15:59,886 INFO L276 IsEmpty]: Start isEmpty. Operand 10493 states and 14988 transitions. [2020-10-15 03:15:59,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 03:15:59,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:15:59,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:15:59,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 03:15:59,888 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:15:59,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:15:59,888 INFO L82 PathProgramCache]: Analyzing trace with hash 275613067, now seen corresponding path program 1 times [2020-10-15 03:15:59,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:15:59,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306463930] [2020-10-15 03:15:59,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:15:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:15:59,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:15:59,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:15:59,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 03:15:59,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:15:59,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-15 03:15:59,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:15:59,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:15:59,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:15:59,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-15 03:15:59,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-15 03:15:59,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:16:00,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:16:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:16:00,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:00,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:16:00,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:16:00,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:16:00,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:16:00,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:16:00,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:16:00,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:16:00,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:16:00,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:16:00,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:16:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:16:00,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306463930] [2020-10-15 03:16:00,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:16:00,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:16:00,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905596765] [2020-10-15 03:16:00,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:16:00,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:16:00,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:16:00,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:16:00,173 INFO L87 Difference]: Start difference. First operand 10493 states and 14988 transitions. Second operand 5 states. [2020-10-15 03:16:01,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:16:01,846 INFO L93 Difference]: Finished difference Result 16390 states and 23428 transitions. [2020-10-15 03:16:01,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:16:01,847 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-15 03:16:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:16:01,908 INFO L225 Difference]: With dead ends: 16390 [2020-10-15 03:16:01,909 INFO L226 Difference]: Without dead ends: 16388 [2020-10-15 03:16:01,917 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 [2020-10-15 03:16:01,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16388 states. [2020-10-15 03:16:02,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16388 to 10781. [2020-10-15 03:16:02,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10781 states. [2020-10-15 03:16:02,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10781 states to 10781 states and 15172 transitions. [2020-10-15 03:16:02,940 INFO L78 Accepts]: Start accepts. Automaton has 10781 states and 15172 transitions. Word has length 46 [2020-10-15 03:16:02,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:16:02,940 INFO L479 AbstractCegarLoop]: Abstraction has 10781 states and 15172 transitions. [2020-10-15 03:16:02,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:16:02,940 INFO L276 IsEmpty]: Start isEmpty. Operand 10781 states and 15172 transitions. [2020-10-15 03:16:02,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-15 03:16:02,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:16:02,941 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] [2020-10-15 03:16:02,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 03:16:02,942 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:16:02,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:16:02,942 INFO L82 PathProgramCache]: Analyzing trace with hash 967693490, now seen corresponding path program 1 times [2020-10-15 03:16:02,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:16:02,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509130135] [2020-10-15 03:16:02,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:16:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:16:02,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:02,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:02,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:03,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:16:03,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 03:16:03,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:16:03,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-10-15 03:16:03,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:16:03,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:16:03,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:16:03,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:16:03,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 03:16:03,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:16:03,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:16:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:16:03,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:03,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:16:03,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:16:03,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:16:03,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-15 03:16:03,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:16:03,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:16:03,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:16:03,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:16:03,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:16:03,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:16:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:16:03,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509130135] [2020-10-15 03:16:03,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:16:03,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:16:03,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660069104] [2020-10-15 03:16:03,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:16:03,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:16:03,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:16:03,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:16:03,627 INFO L87 Difference]: Start difference. First operand 10781 states and 15172 transitions. Second operand 7 states. [2020-10-15 03:16:04,004 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-10-15 03:16:05,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:16:05,825 INFO L93 Difference]: Finished difference Result 28813 states and 40462 transitions. [2020-10-15 03:16:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:16:05,826 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-10-15 03:16:05,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:16:05,885 INFO L225 Difference]: With dead ends: 28813 [2020-10-15 03:16:05,885 INFO L226 Difference]: Without dead ends: 20045 [2020-10-15 03:16:05,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-15 03:16:05,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20045 states. [2020-10-15 03:16:07,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20045 to 10788. [2020-10-15 03:16:07,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10788 states. [2020-10-15 03:16:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10788 states to 10788 states and 15181 transitions. [2020-10-15 03:16:07,184 INFO L78 Accepts]: Start accepts. Automaton has 10788 states and 15181 transitions. Word has length 48 [2020-10-15 03:16:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:16:07,185 INFO L479 AbstractCegarLoop]: Abstraction has 10788 states and 15181 transitions. [2020-10-15 03:16:07,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:16:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 10788 states and 15181 transitions. [2020-10-15 03:16:07,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-15 03:16:07,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:16:07,189 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:16:07,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 03:16:07,190 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:16:07,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:16:07,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1017107513, now seen corresponding path program 1 times [2020-10-15 03:16:07,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:16:07,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640315528] [2020-10-15 03:16:07,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:16:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:16:07,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:07,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:07,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:07,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:07,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:10,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:16:10,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-15 03:16:10,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:16:10,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3101 [2020-10-15 03:16:10,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:16:10,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:16:10,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 03:16:10,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:16:10,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-15 03:16:10,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:16:10,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:16:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:16:10,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:10,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:16:10,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:16:10,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:16:10,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 03:16:10,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:16:10,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:16:10,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:16:10,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:16:10,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:16:10,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:16:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:16:10,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640315528] [2020-10-15 03:16:10,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:16:10,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 03:16:10,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56159988] [2020-10-15 03:16:10,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 03:16:10,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:16:10,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 03:16:10,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:16:10,782 INFO L87 Difference]: Start difference. First operand 10788 states and 15181 transitions. Second operand 10 states. [2020-10-15 03:16:16,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:16:16,781 INFO L93 Difference]: Finished difference Result 52936 states and 74159 transitions. [2020-10-15 03:16:16,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 03:16:16,782 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-15 03:16:16,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:16:16,897 INFO L225 Difference]: With dead ends: 52936 [2020-10-15 03:16:16,897 INFO L226 Difference]: Without dead ends: 47200 [2020-10-15 03:16:16,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2020-10-15 03:16:16,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47200 states. [2020-10-15 03:16:19,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47200 to 20108. [2020-10-15 03:16:19,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20108 states. [2020-10-15 03:16:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20108 states to 20108 states and 28241 transitions. [2020-10-15 03:16:19,336 INFO L78 Accepts]: Start accepts. Automaton has 20108 states and 28241 transitions. Word has length 67 [2020-10-15 03:16:19,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:16:19,336 INFO L479 AbstractCegarLoop]: Abstraction has 20108 states and 28241 transitions. [2020-10-15 03:16:19,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 03:16:19,336 INFO L276 IsEmpty]: Start isEmpty. Operand 20108 states and 28241 transitions. [2020-10-15 03:16:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-15 03:16:19,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:16:19,353 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-10-15 03:16:19,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 03:16:19,353 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:16:19,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:16:19,354 INFO L82 PathProgramCache]: Analyzing trace with hash 295852200, now seen corresponding path program 1 times [2020-10-15 03:16:19,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:16:19,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631586727] [2020-10-15 03:16:19,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:16:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:16:19,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:19,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:19,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:19,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:19,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:23,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:16:23,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-15 03:16:23,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:16:23,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3640 [2020-10-15 03:16:23,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:16:23,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:16:23,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:16:23,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:16:23,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-15 03:16:23,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:16:23,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:16:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:16:23,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:23,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:16:23,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:16:23,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:16:23,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:16:23,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:16:23,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:16:23,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:16:23,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:16:23,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:16:23,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:16:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:16:23,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631586727] [2020-10-15 03:16:23,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:16:23,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 03:16:23,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868752927] [2020-10-15 03:16:23,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:16:23,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:16:23,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:16:23,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:16:23,415 INFO L87 Difference]: Start difference. First operand 20108 states and 28241 transitions. Second operand 9 states. [2020-10-15 03:16:23,601 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-15 03:16:32,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:16:32,102 INFO L93 Difference]: Finished difference Result 70981 states and 99178 transitions. [2020-10-15 03:16:32,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 03:16:32,103 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-10-15 03:16:32,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:16:32,224 INFO L225 Difference]: With dead ends: 70981 [2020-10-15 03:16:32,225 INFO L226 Difference]: Without dead ends: 50903 [2020-10-15 03:16:32,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2020-10-15 03:16:32,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50903 states. [2020-10-15 03:16:34,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50903 to 20108. [2020-10-15 03:16:34,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20108 states. [2020-10-15 03:16:34,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20108 states to 20108 states and 28057 transitions. [2020-10-15 03:16:34,936 INFO L78 Accepts]: Start accepts. Automaton has 20108 states and 28057 transitions. Word has length 67 [2020-10-15 03:16:34,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:16:34,936 INFO L479 AbstractCegarLoop]: Abstraction has 20108 states and 28057 transitions. [2020-10-15 03:16:34,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:16:34,936 INFO L276 IsEmpty]: Start isEmpty. Operand 20108 states and 28057 transitions. [2020-10-15 03:16:34,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 03:16:34,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:16:34,939 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-10-15 03:16:34,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 03:16:34,940 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:16:34,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:16:34,940 INFO L82 PathProgramCache]: Analyzing trace with hash -594852700, now seen corresponding path program 1 times [2020-10-15 03:16:34,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:16:34,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075588994] [2020-10-15 03:16:34,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:16:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:16:34,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:34,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:35,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:35,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:35,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:35,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:37,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:39,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:39,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:16:39,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 03:16:39,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 03:16:39,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 03:16:39,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:16:39,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:16:39,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:16:39,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:16:39,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-15 03:16:39,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:16:40,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:16:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:16:40,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:40,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:16:40,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:16:40,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:16:40,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:16:40,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:16:40,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:16:40,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:16:40,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:16:40,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:16:40,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:16:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:16:40,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075588994] [2020-10-15 03:16:40,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:16:40,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 03:16:40,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951088294] [2020-10-15 03:16:40,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:16:40,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:16:40,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:16:40,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:16:40,156 INFO L87 Difference]: Start difference. First operand 20108 states and 28057 transitions. Second operand 6 states. [2020-10-15 03:16:40,286 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-15 03:16:43,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:16:43,972 INFO L93 Difference]: Finished difference Result 38928 states and 55213 transitions. [2020-10-15 03:16:43,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:16:43,973 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-15 03:16:43,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:16:44,014 INFO L225 Difference]: With dead ends: 38928 [2020-10-15 03:16:44,014 INFO L226 Difference]: Without dead ends: 29004 [2020-10-15 03:16:44,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:16:44,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29004 states. [2020-10-15 03:16:48,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29004 to 28718. [2020-10-15 03:16:48,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28718 states. [2020-10-15 03:16:48,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28718 states to 28718 states and 39879 transitions. [2020-10-15 03:16:48,081 INFO L78 Accepts]: Start accepts. Automaton has 28718 states and 39879 transitions. Word has length 68 [2020-10-15 03:16:48,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:16:48,081 INFO L479 AbstractCegarLoop]: Abstraction has 28718 states and 39879 transitions. [2020-10-15 03:16:48,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:16:48,081 INFO L276 IsEmpty]: Start isEmpty. Operand 28718 states and 39879 transitions. [2020-10-15 03:16:48,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 03:16:48,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:16:48,085 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:16:48,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 03:16:48,085 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:16:48,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:16:48,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2026982534, now seen corresponding path program 1 times [2020-10-15 03:16:48,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:16:48,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977179069] [2020-10-15 03:16:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:16:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:16:48,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:48,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:48,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:48,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:48,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:48,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:49,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:49,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:49,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:49,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:49,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:51,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:16:51,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 03:16:51,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-15 03:16:51,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3739 [2020-10-15 03:16:51,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:16:51,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:16:51,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:16:51,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:16:51,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-15 03:16:51,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:16:51,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:16:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:16:51,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:16:52,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:16:52,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:16:52,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:16:52,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:16:52,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:16:52,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:16:52,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:16:52,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:16:52,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:16:52,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:16:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:16:52,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977179069] [2020-10-15 03:16:52,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:16:52,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:16:52,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037274241] [2020-10-15 03:16:52,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:16:52,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:16:52,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:16:52,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:16:52,027 INFO L87 Difference]: Start difference. First operand 28718 states and 39879 transitions. Second operand 8 states. [2020-10-15 03:16:52,248 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-15 03:16:59,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:16:59,709 INFO L93 Difference]: Finished difference Result 82703 states and 114973 transitions. [2020-10-15 03:16:59,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:16:59,710 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-15 03:16:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:16:59,827 INFO L225 Difference]: With dead ends: 82703 [2020-10-15 03:16:59,828 INFO L226 Difference]: Without dead ends: 54015 [2020-10-15 03:16:59,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-15 03:16:59,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54015 states. [2020-10-15 03:17:03,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54015 to 28051. [2020-10-15 03:17:03,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28051 states. [2020-10-15 03:17:03,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28051 states to 28051 states and 38526 transitions. [2020-10-15 03:17:03,816 INFO L78 Accepts]: Start accepts. Automaton has 28051 states and 38526 transitions. Word has length 68 [2020-10-15 03:17:03,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:17:03,817 INFO L479 AbstractCegarLoop]: Abstraction has 28051 states and 38526 transitions. [2020-10-15 03:17:03,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:17:03,817 INFO L276 IsEmpty]: Start isEmpty. Operand 28051 states and 38526 transitions. [2020-10-15 03:17:03,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 03:17:03,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:17:03,819 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:17:03,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 03:17:03,819 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:17:03,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:17:03,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1546729449, now seen corresponding path program 1 times [2020-10-15 03:17:03,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:17:03,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212937629] [2020-10-15 03:17:03,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:17:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:17:03,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:03,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:04,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:17:04,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 03:17:04,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:17:04,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-15 03:17:04,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:17:04,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:17:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 03:17:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:17:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-15 03:17:04,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:17:04,360 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 25 [2020-10-15 03:17:04,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:17:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:17:04,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:04,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:17:04,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:17:04,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:17:04,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 03:17:04,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:17:04,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:17:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:17:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:17:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:17:04,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:17:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:17:04,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212937629] [2020-10-15 03:17:04,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:17:04,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 03:17:04,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861672146] [2020-10-15 03:17:04,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 03:17:04,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:17:04,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 03:17:04,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:17:04,504 INFO L87 Difference]: Start difference. First operand 28051 states and 38526 transitions. Second operand 10 states. [2020-10-15 03:17:26,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:17:26,502 INFO L93 Difference]: Finished difference Result 151427 states and 205700 transitions. [2020-10-15 03:17:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 03:17:26,502 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-10-15 03:17:26,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:17:26,693 INFO L225 Difference]: With dead ends: 151427 [2020-10-15 03:17:26,693 INFO L226 Difference]: Without dead ends: 135742 [2020-10-15 03:17:26,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2020-10-15 03:17:26,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135742 states. [2020-10-15 03:17:39,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135742 to 71082. [2020-10-15 03:17:39,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71082 states. [2020-10-15 03:17:40,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71082 states to 71082 states and 97971 transitions. [2020-10-15 03:17:40,029 INFO L78 Accepts]: Start accepts. Automaton has 71082 states and 97971 transitions. Word has length 68 [2020-10-15 03:17:40,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:17:40,029 INFO L479 AbstractCegarLoop]: Abstraction has 71082 states and 97971 transitions. [2020-10-15 03:17:40,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 03:17:40,029 INFO L276 IsEmpty]: Start isEmpty. Operand 71082 states and 97971 transitions. [2020-10-15 03:17:40,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 03:17:40,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:17:40,036 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:17:40,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 03:17:40,037 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:17:40,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:17:40,037 INFO L82 PathProgramCache]: Analyzing trace with hash -303914834, now seen corresponding path program 1 times [2020-10-15 03:17:40,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:17:40,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563654885] [2020-10-15 03:17:40,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:17:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:17:40,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:40,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:40,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:40,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:40,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:40,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:40,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:41,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:41,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:45,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:17:45,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 03:17:45,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 03:17:45,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 03:17:45,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:17:45,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:17:45,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:17:45,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:17:45,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-15 03:17:45,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:17:45,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:17:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:17:45,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:17:45,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:17:45,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:17:45,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:17:45,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:17:45,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:17:45,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:17:45,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:17:45,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:17:45,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:17:45,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:17:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:17:45,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563654885] [2020-10-15 03:17:45,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:17:45,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 03:17:45,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119268346] [2020-10-15 03:17:45,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:17:45,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:17:45,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:17:45,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:17:45,251 INFO L87 Difference]: Start difference. First operand 71082 states and 97971 transitions. Second operand 9 states. [2020-10-15 03:18:08,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:18:08,543 INFO L93 Difference]: Finished difference Result 205442 states and 279207 transitions. [2020-10-15 03:18:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 03:18:08,544 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2020-10-15 03:18:08,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:18:11,206 INFO L225 Difference]: With dead ends: 205442 [2020-10-15 03:18:11,206 INFO L226 Difference]: Without dead ends: 134390 [2020-10-15 03:18:11,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-10-15 03:18:11,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134390 states. [2020-10-15 03:18:22,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134390 to 65549. [2020-10-15 03:18:22,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65549 states. [2020-10-15 03:18:22,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65549 states to 65549 states and 87982 transitions. [2020-10-15 03:18:22,624 INFO L78 Accepts]: Start accepts. Automaton has 65549 states and 87982 transitions. Word has length 68 [2020-10-15 03:18:22,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:18:22,625 INFO L479 AbstractCegarLoop]: Abstraction has 65549 states and 87982 transitions. [2020-10-15 03:18:22,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:18:22,625 INFO L276 IsEmpty]: Start isEmpty. Operand 65549 states and 87982 transitions. [2020-10-15 03:18:22,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-15 03:18:22,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:18:22,629 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-10-15 03:18:22,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-15 03:18:22,629 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:18:22,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:18:22,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1835951092, now seen corresponding path program 1 times [2020-10-15 03:18:22,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:18:22,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214861684] [2020-10-15 03:18:22,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:18:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:22,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:22,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:22,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:23,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:23,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:27,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:27,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-15 03:18:27,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:18:27,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 03:18:27,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:27,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:27,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:18:27,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:18:27,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-15 03:18:27,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:18:27,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:18:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:18:27,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:18:27,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:18:27,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:18:27,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:18:27,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 03:18:27,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:18:27,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:18:27,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:18:27,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:18:27,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:18:27,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:18:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:18:27,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214861684] [2020-10-15 03:18:27,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:18:27,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 03:18:27,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999224975] [2020-10-15 03:18:27,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:18:27,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:18:27,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:18:27,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:18:27,939 INFO L87 Difference]: Start difference. First operand 65549 states and 87982 transitions. Second operand 9 states. [2020-10-15 03:18:28,120 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-15 03:18:46,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:18:46,665 INFO L93 Difference]: Finished difference Result 156314 states and 208508 transitions. [2020-10-15 03:18:46,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 03:18:46,666 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-10-15 03:18:46,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:18:46,802 INFO L225 Difference]: With dead ends: 156314 [2020-10-15 03:18:46,802 INFO L226 Difference]: Without dead ends: 90795 [2020-10-15 03:18:46,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2020-10-15 03:18:46,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90795 states. [2020-10-15 03:19:00,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90795 to 66381. [2020-10-15 03:19:00,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66381 states. [2020-10-15 03:19:00,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66381 states to 66381 states and 88300 transitions. [2020-10-15 03:19:00,967 INFO L78 Accepts]: Start accepts. Automaton has 66381 states and 88300 transitions. Word has length 69 [2020-10-15 03:19:00,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:19:00,968 INFO L479 AbstractCegarLoop]: Abstraction has 66381 states and 88300 transitions. [2020-10-15 03:19:00,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:19:00,968 INFO L276 IsEmpty]: Start isEmpty. Operand 66381 states and 88300 transitions. [2020-10-15 03:19:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-15 03:19:00,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:19:00,972 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-10-15 03:19:00,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-15 03:19:00,973 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:19:00,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:19:00,973 INFO L82 PathProgramCache]: Analyzing trace with hash 300553167, now seen corresponding path program 1 times [2020-10-15 03:19:00,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:19:00,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288139737] [2020-10-15 03:19:00,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:19:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:19:01,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:01,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:01,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:01,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:03,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:19:03,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-15 03:19:03,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:19:03,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2583 [2020-10-15 03:19:03,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:19:03,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:19:03,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 03:19:03,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:19:03,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-15 03:19:03,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:19:03,964 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-10-15 03:19:04,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:19:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:19:04,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:04,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:19:04,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:19:04,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:19:04,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:19:04,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:19:04,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:19:04,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:19:04,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:19:04,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:19:04,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:19:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:19:04,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288139737] [2020-10-15 03:19:04,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:19:04,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 03:19:04,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766899954] [2020-10-15 03:19:04,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 03:19:04,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:19:04,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 03:19:04,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:19:04,158 INFO L87 Difference]: Start difference. First operand 66381 states and 88300 transitions. Second operand 10 states. [2020-10-15 03:19:04,405 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 100