/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s4lif.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:11:01,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:11:01,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:11:01,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:11:01,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:11:01,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:11:01,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:11:01,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:11:01,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:11:01,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:11:01,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:11:01,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:11:01,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:11:01,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:11:01,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:11:01,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:11:01,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:11:01,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:11:01,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:11:01,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:11:01,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:11:01,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:11:01,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:11:01,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:11:01,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:11:01,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:11:01,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:11:01,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:11:01,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:11:01,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:11:01,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:11:01,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:11:01,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:11:01,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:11:01,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:11:01,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:11:01,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:11:01,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:11:01,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:11:01,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:11:01,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:11:01,960 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 05:11:01,998 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:11:01,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:11:02,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:11:02,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:11:02,002 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:11:02,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:11:02,002 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:11:02,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:11:02,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:11:02,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:11:02,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:11:02,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:11:02,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:11:02,005 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:11:02,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:11:02,006 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:11:02,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:11:02,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:11:02,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:11:02,007 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:11:02,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:11:02,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:11:02,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:11:02,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:11:02,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:11:02,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:11:02,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:11:02,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:11:02,010 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:11:02,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:11:02,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:11:02,415 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:11:02,419 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:11:02,421 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:11:02,422 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:11:02,423 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4lif.c [2020-10-13 05:11:02,493 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a24438c3c/efd30515cea64706a0933a2619807787/FLAGc7de1fe3f [2020-10-13 05:11:03,068 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:11:03,069 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s4lif.c [2020-10-13 05:11:03,077 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a24438c3c/efd30515cea64706a0933a2619807787/FLAGc7de1fe3f [2020-10-13 05:11:03,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a24438c3c/efd30515cea64706a0933a2619807787 [2020-10-13 05:11:03,400 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:11:03,402 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:11:03,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:11:03,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:11:03,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:11:03,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:11:03" (1/1) ... [2020-10-13 05:11:03,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d7e22e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:03, skipping insertion in model container [2020-10-13 05:11:03,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:11:03" (1/1) ... [2020-10-13 05:11:03,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:11:03,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:11:03,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:11:03,657 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:11:03,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:11:03,702 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:11:03,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:03 WrapperNode [2020-10-13 05:11:03,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:11:03,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:11:03,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:11:03,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:11:03,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:03" (1/1) ... [2020-10-13 05:11:03,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:03" (1/1) ... [2020-10-13 05:11:03,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:03" (1/1) ... [2020-10-13 05:11:03,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:03" (1/1) ... [2020-10-13 05:11:03,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:03" (1/1) ... [2020-10-13 05:11:03,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:03" (1/1) ... [2020-10-13 05:11:03,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:03" (1/1) ... [2020-10-13 05:11:03,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:11:03,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:11:03,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:11:03,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:11:03,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:11:03,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:11:03,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:11:03,913 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:11:03,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:11:03,913 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:11:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:11:03,915 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:11:03,916 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:11:03,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:11:03,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:11:03,917 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:11:03,917 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:11:03,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:11:03,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:11:03,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:11:03,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:11:03,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:11:03,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:11:03,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:11:04,293 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:11:04,294 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 05:11:04,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:11:04 BoogieIcfgContainer [2020-10-13 05:11:04,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:11:04,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:11:04,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:11:04,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:11:04,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:11:03" (1/3) ... [2020-10-13 05:11:04,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c2daf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:11:04, skipping insertion in model container [2020-10-13 05:11:04,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:03" (2/3) ... [2020-10-13 05:11:04,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c2daf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:11:04, skipping insertion in model container [2020-10-13 05:11:04,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:11:04" (3/3) ... [2020-10-13 05:11:04,311 INFO L109 eAbstractionObserver]: Analyzing ICFG s4lif.c [2020-10-13 05:11:04,324 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:11:04,334 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:11:04,351 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:11:04,377 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:11:04,377 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:11:04,377 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:11:04,378 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:11:04,378 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:11:04,378 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:11:04,378 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:11:04,378 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:11:04,401 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-13 05:11:04,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 05:11:04,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:04,409 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] [2020-10-13 05:11:04,410 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:04,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:04,417 INFO L82 PathProgramCache]: Analyzing trace with hash -88121349, now seen corresponding path program 1 times [2020-10-13 05:11:04,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:04,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58880842] [2020-10-13 05:11:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:04,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:04,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:04,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:04,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:05,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:05,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 05:11:05,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:11:05,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1219 [2020-10-13 05:11:05,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:05,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:05,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 05:11:05,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:05,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 05:11:05,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:05,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:05,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:05,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:05,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:05,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:05,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:11:05,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:05,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:05,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:05,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:05,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:05,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:05,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:05,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:05,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:05,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:05,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:05,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:05,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:05,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:05,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 05:11:05,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:05,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:11:05,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58880842] [2020-10-13 05:11:05,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:11:05,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:11:05,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448401273] [2020-10-13 05:11:05,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:11:05,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:05,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:11:05,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:11:05,949 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-13 05:11:06,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:06,076 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-10-13 05:11:06,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:11:06,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-13 05:11:06,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:06,091 INFO L225 Difference]: With dead ends: 60 [2020-10-13 05:11:06,091 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 05:11:06,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:11:06,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 05:11:06,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 05:11:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 05:11:06,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-13 05:11:06,151 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-10-13 05:11:06,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:06,152 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-13 05:11:06,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:11:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-13 05:11:06,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 05:11:06,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:06,154 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] [2020-10-13 05:11:06,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:11:06,155 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:06,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:06,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1099238599, now seen corresponding path program 1 times [2020-10-13 05:11:06,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:06,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702727155] [2020-10-13 05:11:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:06,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:06,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:06,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:06,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:06,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 05:11:06,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:11:06,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-13 05:11:06,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:06,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:11:06,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:11:06,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:11:06,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:06,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:06,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:06,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:06,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:06,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:06,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:11:06,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:06,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:06,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:06,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:06,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:06,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:06,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:06,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:06,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:06,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:06,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:11:06,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:06,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:11:06,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:06,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:11:06,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:11:06,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702727155] [2020-10-13 05:11:06,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:11:06,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:11:06,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063720963] [2020-10-13 05:11:06,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:11:06,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:06,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:11:06,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:11:06,477 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-10-13 05:11:06,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:06,620 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-10-13 05:11:06,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:11:06,621 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-13 05:11:06,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:06,623 INFO L225 Difference]: With dead ends: 48 [2020-10-13 05:11:06,623 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 05:11:06,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:11:06,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 05:11:06,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-10-13 05:11:06,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 05:11:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-13 05:11:06,635 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-10-13 05:11:06,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:06,635 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-13 05:11:06,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:11:06,636 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-13 05:11:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:11:06,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:06,637 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] [2020-10-13 05:11:06,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:11:06,638 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:06,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:06,639 INFO L82 PathProgramCache]: Analyzing trace with hash 188437731, now seen corresponding path program 1 times [2020-10-13 05:11:06,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:06,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794634993] [2020-10-13 05:11:06,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:06,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:06,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:07,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:07,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:08,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:08,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:08,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:09,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:09,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:09,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:11:09,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:11:09,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2512 [2020-10-13 05:11:09,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:09,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:11:09,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:09,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 05:11:09,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:09,466 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2020-10-13 05:11:09,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:09,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:09,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:09,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:09,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:09,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:11:09,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:09,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:09,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:09,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:09,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:09,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:09,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:09,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:09,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:09,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:09,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:09,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:09,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:09,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:09,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:11:09,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794634993] [2020-10-13 05:11:09,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:09,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:11:09,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534177805] [2020-10-13 05:11:09,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:11:09,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:09,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:11:09,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:11:09,826 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 15 states. [2020-10-13 05:11:10,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:10,792 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-13 05:11:10,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:11:10,793 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-13 05:11:10,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:10,795 INFO L225 Difference]: With dead ends: 48 [2020-10-13 05:11:10,795 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 05:11:10,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:11:10,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 05:11:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-10-13 05:11:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 05:11:10,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-13 05:11:10,805 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 30 [2020-10-13 05:11:10,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:10,806 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-13 05:11:10,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:11:10,806 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-13 05:11:10,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:11:10,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:10,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:11:10,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:11:10,808 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:10,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:10,809 INFO L82 PathProgramCache]: Analyzing trace with hash 446603169, now seen corresponding path program 1 times [2020-10-13 05:11:10,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:10,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468108408] [2020-10-13 05:11:10,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:10,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:10,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:10,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:11,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:11,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:11,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:11:11,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:11:11,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1050 [2020-10-13 05:11:11,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:11,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:11:11,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:11,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:11:11,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:12,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:12,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:12,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:12,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:12,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:12,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:11:12,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:12,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:12,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:12,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:12,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:12,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:12,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:12,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:12,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:12,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:12,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:11:12,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:12,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:12,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:12,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:12,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:11:12,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468108408] [2020-10-13 05:11:12,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:12,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:11:12,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432261590] [2020-10-13 05:11:12,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:11:12,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:12,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:11:12,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:11:12,033 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2020-10-13 05:11:12,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:12,225 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-10-13 05:11:12,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:11:12,226 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-13 05:11:12,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:12,227 INFO L225 Difference]: With dead ends: 53 [2020-10-13 05:11:12,227 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 05:11:12,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:11:12,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 05:11:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-13 05:11:12,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 05:11:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-13 05:11:12,236 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 30 [2020-10-13 05:11:12,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:12,237 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-13 05:11:12,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:11:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-13 05:11:12,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 05:11:12,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:12,238 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:11:12,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:11:12,239 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:12,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:12,239 INFO L82 PathProgramCache]: Analyzing trace with hash -231251771, now seen corresponding path program 2 times [2020-10-13 05:11:12,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:12,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168576966] [2020-10-13 05:11:12,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:12,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:12,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:12,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:12,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 05:11:12,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:11:12,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-10-13 05:11:12,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:12,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:11:12,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 05:11:12,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 05:11:12,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:12,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:12,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:12,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:12,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:12,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:12,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:12,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:12,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:12,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:12,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:12,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:12,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:12,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:12,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:12,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:12,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:12,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:12,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:12,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:12,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:12,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:12,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:11:12,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168576966] [2020-10-13 05:11:12,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:12,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:11:12,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298368473] [2020-10-13 05:11:12,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:11:12,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:12,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:11:12,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:11:12,843 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 8 states. [2020-10-13 05:11:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:13,062 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-10-13 05:11:13,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:11:13,063 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 05:11:13,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:13,064 INFO L225 Difference]: With dead ends: 70 [2020-10-13 05:11:13,064 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 05:11:13,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:11:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 05:11:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-10-13 05:11:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 05:11:13,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-13 05:11:13,072 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 32 [2020-10-13 05:11:13,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:13,073 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-13 05:11:13,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:11:13,073 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-13 05:11:13,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 05:11:13,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:13,075 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] [2020-10-13 05:11:13,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:11:13,075 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:13,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:13,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1341613535, now seen corresponding path program 3 times [2020-10-13 05:11:13,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:13,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777229958] [2020-10-13 05:11:13,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:13,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:13,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:13,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:13,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:13,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:13,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:13,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:14,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:15,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:15,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:16,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:16,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 05:11:16,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:11:16,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3854 [2020-10-13 05:11:16,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:16,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:11:16,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 05:11:16,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:11:16,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:17,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:17,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:17,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:17,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:17,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:17,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:11:17,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:17,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:17,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:17,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:17,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:17,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:17,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:17,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:17,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:17,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:17,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:17,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:17,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:17,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:17,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:17,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:11:17,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777229958] [2020-10-13 05:11:17,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:17,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:11:17,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048182465] [2020-10-13 05:11:17,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:11:17,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:17,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:11:17,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:11:17,035 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 8 states. [2020-10-13 05:11:17,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:17,275 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-13 05:11:17,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:11:17,276 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-13 05:11:17,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:17,277 INFO L225 Difference]: With dead ends: 44 [2020-10-13 05:11:17,277 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 05:11:17,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:11:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 05:11:17,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-13 05:11:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 05:11:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-13 05:11:17,285 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 35 [2020-10-13 05:11:17,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:17,285 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-13 05:11:17,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:11:17,286 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-13 05:11:17,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 05:11:17,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:17,287 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] [2020-10-13 05:11:17,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:11:17,288 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:17,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:17,288 INFO L82 PathProgramCache]: Analyzing trace with hash -130866495, now seen corresponding path program 4 times [2020-10-13 05:11:17,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:17,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620355601] [2020-10-13 05:11:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:17,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:17,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:17,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:18,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:18,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:18,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:19,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:19,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:19,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:19,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:20,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:20,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:20,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:21,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:21,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:22,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:22,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:22,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:22,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 05:11:22,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 05:11:22,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 05:11:22,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:22,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:11:22,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:22,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:11:22,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:23,214 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2020-10-13 05:11:23,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:23,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:23,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:23,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:23,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:23,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:23,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:23,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:23,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:23,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:23,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:23,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:23,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:23,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:23,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:23,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:23,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:23,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:23,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:23,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:23,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:23,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:11:23,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620355601] [2020-10-13 05:11:23,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:23,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:11:23,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224400289] [2020-10-13 05:11:23,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:11:23,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:23,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:11:23,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:11:23,913 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 21 states. [2020-10-13 05:11:25,499 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-13 05:11:25,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:25,998 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-10-13 05:11:26,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:11:26,004 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-10-13 05:11:26,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:26,008 INFO L225 Difference]: With dead ends: 55 [2020-10-13 05:11:26,008 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 05:11:26,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:11:26,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 05:11:26,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-10-13 05:11:26,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 05:11:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-13 05:11:26,024 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 37 [2020-10-13 05:11:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:26,025 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-13 05:11:26,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:11:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-13 05:11:26,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 05:11:26,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:26,026 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:11:26,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:11:26,027 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:26,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1141983745, now seen corresponding path program 1 times [2020-10-13 05:11:26,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:26,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912433945] [2020-10-13 05:11:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:26,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:26,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:26,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:26,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:26,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:27,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:27,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:28,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:28,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 05:11:28,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:11:28,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2805 [2020-10-13 05:11:28,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:28,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:11:28,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:11:28,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 05:11:28,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:28,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:28,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:28,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:28,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:28,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:28,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:28,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:28,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:28,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:28,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:28,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:28,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:28,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:28,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:28,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:28,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:28,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:28,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:28,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:28,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:28,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:28,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 05:11:29,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912433945] [2020-10-13 05:11:29,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:29,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:11:29,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679837302] [2020-10-13 05:11:29,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:11:29,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:29,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:11:29,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:11:29,005 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 11 states. [2020-10-13 05:11:29,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:29,303 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-13 05:11:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:11:29,303 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-13 05:11:29,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:29,305 INFO L225 Difference]: With dead ends: 58 [2020-10-13 05:11:29,305 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 05:11:29,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:11:29,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 05:11:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 05:11:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 05:11:29,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-13 05:11:29,313 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 37 [2020-10-13 05:11:29,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:29,313 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-13 05:11:29,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:11:29,313 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-13 05:11:29,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 05:11:29,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:29,314 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-13 05:11:29,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:11:29,315 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:29,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:29,315 INFO L82 PathProgramCache]: Analyzing trace with hash -2139934941, now seen corresponding path program 5 times [2020-10-13 05:11:29,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:29,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714178867] [2020-10-13 05:11:29,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:29,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:29,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:30,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:11:30,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:11:30,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1133 [2020-10-13 05:11:30,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:30,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:11:30,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 05:11:30,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:11:30,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:30,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:30,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:30,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:30,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:30,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:30,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:30,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:30,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:30,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:30,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:30,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:30,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:30,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:30,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:30,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:30,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:30,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:30,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:30,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:30,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:11:30,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714178867] [2020-10-13 05:11:30,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:30,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:11:30,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722135065] [2020-10-13 05:11:30,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:11:30,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:30,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:11:30,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:11:30,578 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 10 states. [2020-10-13 05:11:30,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:30,852 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2020-10-13 05:11:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:11:30,853 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-13 05:11:30,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:30,854 INFO L225 Difference]: With dead ends: 93 [2020-10-13 05:11:30,854 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 05:11:30,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:11:30,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 05:11:30,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 43. [2020-10-13 05:11:30,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 05:11:30,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-13 05:11:30,863 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 39 [2020-10-13 05:11:30,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:30,864 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-13 05:11:30,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:11:30,864 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-13 05:11:30,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 05:11:30,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:30,865 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-10-13 05:11:30,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:11:30,866 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:30,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:30,866 INFO L82 PathProgramCache]: Analyzing trace with hash 890720641, now seen corresponding path program 6 times [2020-10-13 05:11:30,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:30,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099713660] [2020-10-13 05:11:30,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:30,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:31,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:31,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:31,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:31,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:31,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:31,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:31,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:31,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:32,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:32,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:32,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:32,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:33,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:33,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:33,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:35,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:35,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:35,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 05:11:35,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 05:11:35,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:11:35,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:35,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:11:35,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:11:35,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:11:35,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:36,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:36,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:36,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:36,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:36,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:36,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:11:36,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:36,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:36,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:36,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:36,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:36,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:36,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:36,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:36,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:36,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:36,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:36,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:36,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:36,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:36,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:36,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 05:11:36,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099713660] [2020-10-13 05:11:36,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:36,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:11:36,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464191230] [2020-10-13 05:11:36,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:11:36,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:36,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:11:36,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:11:36,079 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 14 states. [2020-10-13 05:11:36,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:36,639 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-10-13 05:11:36,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:11:36,640 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-13 05:11:36,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:36,641 INFO L225 Difference]: With dead ends: 71 [2020-10-13 05:11:36,642 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 05:11:36,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:11:36,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 05:11:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2020-10-13 05:11:36,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 05:11:36,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-10-13 05:11:36,652 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 42 [2020-10-13 05:11:36,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:36,653 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-10-13 05:11:36,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:11:36,653 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-10-13 05:11:36,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 05:11:36,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:36,654 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-13 05:11:36,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:11:36,654 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:36,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:36,655 INFO L82 PathProgramCache]: Analyzing trace with hash -697627261, now seen corresponding path program 2 times [2020-10-13 05:11:36,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:36,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152295358] [2020-10-13 05:11:36,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:36,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:36,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:36,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:37,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:37,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:37,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:38,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:38,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:38,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:39,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:39,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:39,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:39,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:40,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:40,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:41,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:41,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 05:11:41,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 05:11:41,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:11:41,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:41,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:11:41,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:41,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:11:41,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:41,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:41,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:41,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:41,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:41,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:41,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:41,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:41,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:41,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:41,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:41,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:41,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:41,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:41,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:41,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:41,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:41,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:41,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:41,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:41,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:41,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:41,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 05:11:41,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152295358] [2020-10-13 05:11:41,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:41,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:11:41,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201486836] [2020-10-13 05:11:41,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:11:41,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:41,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:11:41,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:11:41,802 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 9 states. [2020-10-13 05:11:42,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:42,132 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2020-10-13 05:11:42,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:11:42,133 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-13 05:11:42,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:42,134 INFO L225 Difference]: With dead ends: 84 [2020-10-13 05:11:42,134 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 05:11:42,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:11:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 05:11:42,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-10-13 05:11:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 05:11:42,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-13 05:11:42,162 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 42 [2020-10-13 05:11:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:42,163 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-13 05:11:42,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:11:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-13 05:11:42,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 05:11:42,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:42,165 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:11:42,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:11:42,166 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:42,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:42,166 INFO L82 PathProgramCache]: Analyzing trace with hash 352759267, now seen corresponding path program 7 times [2020-10-13 05:11:42,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:42,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584326355] [2020-10-13 05:11:42,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:42,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:42,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:43,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:43,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:44,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:44,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:44,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:44,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:45,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:45,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:45,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:45,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:46,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:46,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:46,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:46,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:46,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:47,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:47,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:47,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 05:11:47,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 05:11:47,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5093 [2020-10-13 05:11:47,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:47,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:11:47,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:47,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 05:11:47,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:49,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:49,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:49,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:49,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:49,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:49,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:49,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:49,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:49,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:49,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:49,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:49,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:49,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:49,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:49,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:49,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:49,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:11:49,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:49,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:49,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:49,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:49,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:11:49,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584326355] [2020-10-13 05:11:49,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:49,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 05:11:49,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407909480] [2020-10-13 05:11:49,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 05:11:49,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:49,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 05:11:49,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:11:49,102 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 29 states. [2020-10-13 05:11:51,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:51,575 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2020-10-13 05:11:51,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:11:51,576 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 44 [2020-10-13 05:11:51,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:51,577 INFO L225 Difference]: With dead ends: 86 [2020-10-13 05:11:51,577 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 05:11:51,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=201, Invalid=1869, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:11:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 05:11:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-10-13 05:11:51,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 05:11:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-10-13 05:11:51,590 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 44 [2020-10-13 05:11:51,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:51,590 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-10-13 05:11:51,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 05:11:51,591 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-10-13 05:11:51,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 05:11:51,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:51,592 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-10-13 05:11:51,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:11:51,592 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:51,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:51,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2136918779, now seen corresponding path program 3 times [2020-10-13 05:11:51,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:51,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837423800] [2020-10-13 05:11:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:51,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:51,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:51,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:51,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:51,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:52,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:52,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:52,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:52,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:53,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:53,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:53,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:53,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:54,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:54,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:54,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:54,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:54,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:55,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:56,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:56,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 05:11:56,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 05:11:56,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:11:56,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:56,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:11:56,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:56,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:11:56,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:56,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:56,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:56,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:56,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:56,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:56,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:56,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:56,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:56,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:56,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:56,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:56,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:56,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:56,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:56,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:56,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:56,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:56,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:56,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:56,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:56,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:56,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 05:11:56,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837423800] [2020-10-13 05:11:56,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:56,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:11:56,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102670566] [2020-10-13 05:11:56,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:11:56,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:56,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:11:56,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:11:56,766 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 11 states. [2020-10-13 05:11:57,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:57,181 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2020-10-13 05:11:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:11:57,182 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-13 05:11:57,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:57,183 INFO L225 Difference]: With dead ends: 97 [2020-10-13 05:11:57,183 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 05:11:57,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:11:57,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 05:11:57,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-10-13 05:11:57,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 05:11:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-10-13 05:11:57,195 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 45 [2020-10-13 05:11:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:57,195 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-10-13 05:11:57,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:11:57,195 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-10-13 05:11:57,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 05:11:57,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:57,196 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:11:57,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:11:57,197 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:57,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:57,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1232045627, now seen corresponding path program 8 times [2020-10-13 05:11:57,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:57,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794388694] [2020-10-13 05:11:57,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:57,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:57,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:57,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:57,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 05:11:57,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:11:57,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 781 [2020-10-13 05:11:57,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:57,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:11:57,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:11:57,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 05:11:57,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:58,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:58,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:58,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:58,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:58,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:58,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:58,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:58,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:58,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:58,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:58,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:58,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:58,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:58,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:58,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:58,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:58,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:11:58,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:58,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:58,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:58,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:58,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 05:11:58,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794388694] [2020-10-13 05:11:58,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:58,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:11:58,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754575056] [2020-10-13 05:11:58,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:11:58,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:58,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:11:58,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:11:58,091 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 12 states. [2020-10-13 05:11:58,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:58,429 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2020-10-13 05:11:58,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:11:58,430 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-13 05:11:58,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:58,431 INFO L225 Difference]: With dead ends: 111 [2020-10-13 05:11:58,432 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 05:11:58,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:11:58,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 05:11:58,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2020-10-13 05:11:58,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 05:11:58,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-10-13 05:11:58,442 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 46 [2020-10-13 05:11:58,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:58,443 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-10-13 05:11:58,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:11:58,443 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-10-13 05:11:58,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 05:11:58,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:58,444 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:11:58,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:11:58,444 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:58,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:58,445 INFO L82 PathProgramCache]: Analyzing trace with hash -492711775, now seen corresponding path program 9 times [2020-10-13 05:11:58,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:58,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581719850] [2020-10-13 05:11:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:58,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:58,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:59,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:59,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:59,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:59,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:59,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:00,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:00,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:00,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:01,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:01,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:03,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:03,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:03,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:03,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 05:12:03,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 05:12:03,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-13 05:12:03,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:03,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:12:03,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:12:03,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 05:12:03,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:03,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:03,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:03,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:03,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:03,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:03,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:03,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:03,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:03,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:03,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:03,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:03,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:03,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:03,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:03,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:03,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:03,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:03,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:03,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:03,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:03,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:03,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 05:12:03,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581719850] [2020-10-13 05:12:03,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:03,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:12:03,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756977812] [2020-10-13 05:12:03,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:12:03,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:03,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:12:03,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:12:03,626 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 12 states. [2020-10-13 05:12:04,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:04,010 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-10-13 05:12:04,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:12:04,010 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-13 05:12:04,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:04,011 INFO L225 Difference]: With dead ends: 68 [2020-10-13 05:12:04,011 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 05:12:04,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:12:04,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 05:12:04,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-13 05:12:04,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 05:12:04,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-13 05:12:04,019 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 46 [2020-10-13 05:12:04,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:04,019 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-13 05:12:04,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:12:04,020 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-13 05:12:04,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:12:04,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:04,020 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:04,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:12:04,021 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:04,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:04,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1187378249, now seen corresponding path program 10 times [2020-10-13 05:12:04,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:04,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271718218] [2020-10-13 05:12:04,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:04,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:04,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:04,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:05,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:07,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:07,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:08,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:08,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:08,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:09,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:09,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:12:09,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:12:09,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-13 05:12:09,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:09,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:12:09,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:12:09,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 05:12:09,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:09,850 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2020-10-13 05:12:11,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:11,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:11,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:11,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:11,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:11,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:11,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:11,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:11,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:11,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:11,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:11,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:11,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:11,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:11,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:11,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:11,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:11,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:11,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:11,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:11,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:11,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:11,678 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:12:11,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271718218] [2020-10-13 05:12:11,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:11,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 05:12:11,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688633066] [2020-10-13 05:12:11,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 05:12:11,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:11,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 05:12:11,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:12:11,681 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 32 states. [2020-10-13 05:12:12,914 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 65 [2020-10-13 05:12:13,776 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2020-10-13 05:12:14,695 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 84 [2020-10-13 05:12:15,015 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2020-10-13 05:12:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:15,922 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-13 05:12:15,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 05:12:15,923 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 51 [2020-10-13 05:12:15,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:15,924 INFO L225 Difference]: With dead ends: 76 [2020-10-13 05:12:15,924 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 05:12:15,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=291, Invalid=2789, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 05:12:15,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 05:12:15,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-10-13 05:12:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 05:12:15,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-10-13 05:12:15,936 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 51 [2020-10-13 05:12:15,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:15,937 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-10-13 05:12:15,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 05:12:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-10-13 05:12:15,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 05:12:15,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:15,938 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:15,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:12:15,938 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:15,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:15,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1972879019, now seen corresponding path program 11 times [2020-10-13 05:12:15,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:15,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519688747] [2020-10-13 05:12:15,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:15,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:15,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:17,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:17,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 05:12:17,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:17,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1898 [2020-10-13 05:12:17,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:17,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:12:17,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 05:12:17,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:12:17,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:17,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:17,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:17,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:17,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:17,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:17,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:12:17,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:17,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:17,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:17,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:17,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:17,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:18,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:18,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:18,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:18,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:18,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:18,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:18,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:18,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:18,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:18,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 05:12:18,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519688747] [2020-10-13 05:12:18,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:18,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:12:18,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811494300] [2020-10-13 05:12:18,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:12:18,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:18,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:12:18,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:12:18,015 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 14 states. [2020-10-13 05:12:18,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:18,510 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2020-10-13 05:12:18,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:12:18,510 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-13 05:12:18,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:18,511 INFO L225 Difference]: With dead ends: 121 [2020-10-13 05:12:18,511 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 05:12:18,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:12:18,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 05:12:18,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 57. [2020-10-13 05:12:18,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 05:12:18,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-13 05:12:18,521 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 53 [2020-10-13 05:12:18,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:18,521 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-13 05:12:18,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:12:18,522 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-13 05:12:18,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 05:12:18,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:18,523 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:18,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:12:18,523 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:18,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:18,523 INFO L82 PathProgramCache]: Analyzing trace with hash -348871551, now seen corresponding path program 12 times [2020-10-13 05:12:18,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:18,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037036390] [2020-10-13 05:12:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:18,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:18,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:18,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:18,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:18,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:21,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:21,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:21,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:21,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:23,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:23,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:23,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:23,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:23,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:23,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:23,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:23,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 05:12:23,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 39 [2020-10-13 05:12:23,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:12:23,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:23,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:12:23,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 05:12:23,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 05:12:23,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:24,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:24,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:24,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:24,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:24,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:24,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:24,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:24,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:24,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:24,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:24,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:24,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:24,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:24,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:24,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:24,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:24,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:24,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:24,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:24,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:24,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:24,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 05:12:24,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037036390] [2020-10-13 05:12:24,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:24,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:12:24,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875784014] [2020-10-13 05:12:24,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:12:24,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:24,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:12:24,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:12:24,184 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 21 states. [2020-10-13 05:12:25,937 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-13 05:12:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:27,162 INFO L93 Difference]: Finished difference Result 131 states and 152 transitions. [2020-10-13 05:12:27,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-13 05:12:27,162 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-10-13 05:12:27,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:27,164 INFO L225 Difference]: With dead ends: 131 [2020-10-13 05:12:27,164 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 05:12:27,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1070, Invalid=4332, Unknown=0, NotChecked=0, Total=5402 [2020-10-13 05:12:27,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 05:12:27,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2020-10-13 05:12:27,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 05:12:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2020-10-13 05:12:27,185 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 56 [2020-10-13 05:12:27,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:27,186 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2020-10-13 05:12:27,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:12:27,186 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2020-10-13 05:12:27,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 05:12:27,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:27,193 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:27,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:12:27,193 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:27,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:27,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1189396253, now seen corresponding path program 13 times [2020-10-13 05:12:27,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:27,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951638214] [2020-10-13 05:12:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:27,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:27,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:28,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:29,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:29,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:30,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:31,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:32,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:32,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 05:12:32,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:12:32,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:12:32,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:32,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 05:12:32,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:12:32,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 05:12:32,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:33,475 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-13 05:12:33,782 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2020-10-13 05:12:33,940 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-13 05:12:34,125 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2020-10-13 05:12:34,424 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-13 05:12:34,632 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-13 05:12:34,887 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2020-10-13 05:12:35,091 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-13 05:12:35,299 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-13 05:12:36,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:36,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:36,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:36,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:36,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:36,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:36,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:36,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:36,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:36,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:36,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:36,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:36,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:36,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:36,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:36,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:36,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:12:36,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:36,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:36,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:36,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:36,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:37,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951638214] [2020-10-13 05:12:37,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:37,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 05:12:37,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710913907] [2020-10-13 05:12:37,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 05:12:37,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:37,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 05:12:37,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:12:37,025 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand 41 states. [2020-10-13 05:12:38,073 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2020-10-13 05:12:38,692 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2020-10-13 05:12:39,474 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 43 [2020-10-13 05:12:39,695 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 43 [2020-10-13 05:12:39,968 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 50 [2020-10-13 05:12:40,348 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-10-13 05:12:40,665 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2020-10-13 05:12:41,038 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2020-10-13 05:12:41,391 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 62 [2020-10-13 05:12:41,683 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 52 [2020-10-13 05:12:41,949 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 54 [2020-10-13 05:12:42,187 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 46 [2020-10-13 05:12:43,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:43,255 INFO L93 Difference]: Finished difference Result 139 states and 165 transitions. [2020-10-13 05:12:43,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 05:12:43,256 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 58 [2020-10-13 05:12:43,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:43,258 INFO L225 Difference]: With dead ends: 139 [2020-10-13 05:12:43,258 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 05:12:43,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=491, Invalid=4065, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 05:12:43,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 05:12:43,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2020-10-13 05:12:43,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 05:12:43,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 139 transitions. [2020-10-13 05:12:43,275 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 139 transitions. Word has length 58 [2020-10-13 05:12:43,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:43,276 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 139 transitions. [2020-10-13 05:12:43,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 05:12:43,276 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 139 transitions. [2020-10-13 05:12:43,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 05:12:43,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:43,277 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:43,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:12:43,277 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:43,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:43,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1300132709, now seen corresponding path program 4 times [2020-10-13 05:12:43,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:43,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593524417] [2020-10-13 05:12:43,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:43,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:43,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:43,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:43,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:43,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:44,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:44,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:45,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:45,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:45,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:46,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:46,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:46,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:48,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:48,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:48,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 05:12:48,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 05:12:48,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 05:12:48,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:48,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:12:48,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 05:12:48,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:12:48,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:48,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:48,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:48,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:48,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:48,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:48,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:48,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:48,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:48,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:48,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:48,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:48,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:48,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:48,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:48,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:48,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:48,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:12:48,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:48,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:48,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:48,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:48,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-13 05:12:48,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593524417] [2020-10-13 05:12:48,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:48,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:12:48,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049393391] [2020-10-13 05:12:48,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:12:48,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:48,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:12:48,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:12:48,759 INFO L87 Difference]: Start difference. First operand 115 states and 139 transitions. Second operand 14 states. [2020-10-13 05:12:49,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:49,635 INFO L93 Difference]: Finished difference Result 139 states and 165 transitions. [2020-10-13 05:12:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:12:49,636 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-10-13 05:12:49,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:49,638 INFO L225 Difference]: With dead ends: 139 [2020-10-13 05:12:49,638 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 05:12:49,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:12:49,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 05:12:49,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2020-10-13 05:12:49,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 05:12:49,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 133 transitions. [2020-10-13 05:12:49,654 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 133 transitions. Word has length 58 [2020-10-13 05:12:49,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:49,654 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 133 transitions. [2020-10-13 05:12:49,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:12:49,654 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 133 transitions. [2020-10-13 05:12:49,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 05:12:49,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:49,655 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:49,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:12:49,655 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:49,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:49,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1479783227, now seen corresponding path program 14 times [2020-10-13 05:12:49,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:49,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918878849] [2020-10-13 05:12:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:49,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:49,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:52,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:52,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 05:12:52,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:52,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2937 [2020-10-13 05:12:52,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:52,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:12:52,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 05:12:52,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 05:12:52,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:52,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:52,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:52,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:52,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:52,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:52,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:52,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:52,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:52,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:52,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:52,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:52,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:52,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:52,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:52,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:52,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:52,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:12:52,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:52,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:52,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:52,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:52,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 05:12:52,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918878849] [2020-10-13 05:12:52,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:52,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:12:52,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140908180] [2020-10-13 05:12:52,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:12:52,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:52,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:12:52,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:12:52,779 INFO L87 Difference]: Start difference. First operand 113 states and 133 transitions. Second operand 16 states. [2020-10-13 05:12:53,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:53,363 INFO L93 Difference]: Finished difference Result 243 states and 287 transitions. [2020-10-13 05:12:53,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:12:53,364 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-10-13 05:12:53,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:53,366 INFO L225 Difference]: With dead ends: 243 [2020-10-13 05:12:53,366 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 05:12:53,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:12:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 05:12:53,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 110. [2020-10-13 05:12:53,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 05:12:53,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2020-10-13 05:12:53,388 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 60 [2020-10-13 05:12:53,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:53,388 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2020-10-13 05:12:53,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:12:53,389 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2020-10-13 05:12:53,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 05:12:53,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:53,390 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:53,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:12:53,390 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:53,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:53,391 INFO L82 PathProgramCache]: Analyzing trace with hash -261374175, now seen corresponding path program 15 times [2020-10-13 05:12:53,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:53,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326073984] [2020-10-13 05:12:53,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:53,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:53,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:54,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:55,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:56,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:56,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:58,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:58,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:58,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 05:12:58,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:12:58,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:12:58,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:58,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:12:58,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:12:58,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 05:12:58,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:58,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:58,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:58,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:58,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:58,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:58,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:58,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:58,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:58,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:58,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:58,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:58,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:58,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:58,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:58,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:58,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:58,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:12:58,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:58,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:58,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:58,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:58,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 55 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 05:12:58,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326073984] [2020-10-13 05:12:58,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:58,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:12:58,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786226500] [2020-10-13 05:12:58,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:12:58,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:58,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:12:58,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:12:58,593 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand 16 states. [2020-10-13 05:12:59,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:59,303 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2020-10-13 05:12:59,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:12:59,304 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-10-13 05:12:59,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:59,306 INFO L225 Difference]: With dead ends: 136 [2020-10-13 05:12:59,306 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 05:12:59,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:12:59,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 05:12:59,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 66. [2020-10-13 05:12:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 05:12:59,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-13 05:12:59,316 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 60 [2020-10-13 05:12:59,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:59,316 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-13 05:12:59,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:12:59,317 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-13 05:12:59,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:12:59,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:59,317 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:59,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:12:59,318 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:59,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:59,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1669572561, now seen corresponding path program 16 times [2020-10-13 05:12:59,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:59,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373459799] [2020-10-13 05:12:59,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:59,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:00,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:01,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:01,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:02,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:03,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:04,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:04,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 05:13:04,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:13:04,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:13:04,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:04,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 05:13:04,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:13:04,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 05:13:04,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:05,058 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2020-10-13 05:13:05,223 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2020-10-13 05:13:05,388 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-13 05:13:05,549 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-13 05:13:05,720 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2020-10-13 05:13:05,915 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2020-10-13 05:13:06,126 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 51 [2020-10-13 05:13:06,285 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2020-10-13 05:13:06,578 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 59 [2020-10-13 05:13:06,869 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 59 [2020-10-13 05:13:07,241 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2020-10-13 05:13:07,534 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 59 [2020-10-13 05:13:07,898 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 63 [2020-10-13 05:13:08,204 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 59 [2020-10-13 05:13:08,558 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 58 [2020-10-13 05:13:08,880 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2020-10-13 05:13:09,230 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 58 [2020-10-13 05:13:09,522 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2020-10-13 05:13:09,831 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2020-10-13 05:13:10,096 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-10-13 05:13:10,384 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-13 05:13:10,601 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-13 05:13:10,828 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2020-10-13 05:13:11,030 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2020-10-13 05:13:11,249 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-10-13 05:13:11,494 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-13 05:13:11,743 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 42 [2020-10-13 05:13:13,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:13,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:13,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:13,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:13,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:13,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:13:13,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:13,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:13,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:13,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:13,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:13:13,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:13:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:13,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:13,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:13,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:13,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:13,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:13:13,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:13,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:13,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:13,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:13,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 20 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:13,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373459799] [2020-10-13 05:13:13,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:13,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 05:13:13,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637338326] [2020-10-13 05:13:13,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 05:13:13,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:13,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 05:13:13,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1727, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 05:13:13,233 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 45 states. [2020-10-13 05:13:14,471 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 43 [2020-10-13 05:13:14,815 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 49 [2020-10-13 05:13:15,169 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 47 [2020-10-13 05:13:15,515 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 55 [2020-10-13 05:13:15,896 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 58 [2020-10-13 05:13:16,325 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 71 [2020-10-13 05:13:16,805 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 58 [2020-10-13 05:13:17,156 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2020-10-13 05:13:17,537 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2020-10-13 05:13:18,236 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 100 [2020-10-13 05:13:18,436 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2020-10-13 05:13:18,648 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 53 [2020-10-13 05:13:18,881 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-10-13 05:13:19,261 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 57 [2020-10-13 05:13:19,595 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 58 [2020-10-13 05:13:19,878 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 54 [2020-10-13 05:13:20,181 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 62 [2020-10-13 05:13:20,452 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 63 [2020-10-13 05:13:20,739 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 54 [2020-10-13 05:13:21,031 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 54 [2020-10-13 05:13:21,297 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2020-10-13 05:13:21,544 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2020-10-13 05:13:21,903 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 47 [2020-10-13 05:13:22,149 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 53 [2020-10-13 05:13:22,471 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 51 [2020-10-13 05:13:22,702 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 54 [2020-10-13 05:13:23,009 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 52 [2020-10-13 05:13:23,215 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 51 [2020-10-13 05:13:23,494 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2020-10-13 05:13:23,896 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2020-10-13 05:13:24,300 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2020-10-13 05:13:24,843 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 74 [2020-10-13 05:13:25,031 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 24 [2020-10-13 05:13:25,364 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 61 [2020-10-13 05:13:25,629 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 31 [2020-10-13 05:13:25,863 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 51 [2020-10-13 05:13:26,352 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 56 [2020-10-13 05:13:26,626 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 30 [2020-10-13 05:13:26,926 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2020-10-13 05:13:27,471 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 51 [2020-10-13 05:13:27,742 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 25 [2020-10-13 05:13:27,990 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 47 [2020-10-13 05:13:28,450 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 48 [2020-10-13 05:13:28,701 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 25 [2020-10-13 05:13:29,334 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 42 [2020-10-13 05:13:29,917 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2020-10-13 05:13:30,225 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 53 [2020-10-13 05:13:30,765 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 51 [2020-10-13 05:13:31,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:31,335 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2020-10-13 05:13:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-13 05:13:31,336 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 65 [2020-10-13 05:13:31,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:31,336 INFO L225 Difference]: With dead ends: 102 [2020-10-13 05:13:31,337 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 05:13:31,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=1703, Invalid=10069, Unknown=0, NotChecked=0, Total=11772 [2020-10-13 05:13:31,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 05:13:31,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-10-13 05:13:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 05:13:31,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-10-13 05:13:31,353 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 65 [2020-10-13 05:13:31,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:31,353 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-10-13 05:13:31,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 05:13:31,353 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-10-13 05:13:31,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:13:31,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:31,354 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:31,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:13:31,354 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:31,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:31,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1160099471, now seen corresponding path program 5 times [2020-10-13 05:13:31,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:31,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831898366] [2020-10-13 05:13:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:31,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:31,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:31,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:31,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:31,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:32,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:32,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:32,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:32,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:33,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:34,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:34,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:34,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:34,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:34,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:34,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:34,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:34,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:35,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:35,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:35,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:35,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:35,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:36,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:36,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:36,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 05:13:36,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-13 05:13:36,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 05:13:36,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:36,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:13:36,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:13:36,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:13:36,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:36,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:36,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:36,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:36,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:36,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:36,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:36,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:36,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:36,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:36,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:36,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:36,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:13:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:36,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:36,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:36,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:36,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:36,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:13:36,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:36,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:36,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:36,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:36,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 29 proven. 45 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 05:13:36,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831898366] [2020-10-13 05:13:36,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:36,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:13:36,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103976970] [2020-10-13 05:13:36,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:13:36,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:36,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:13:36,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:13:36,677 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 13 states. [2020-10-13 05:13:37,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:37,434 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2020-10-13 05:13:37,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:13:37,435 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-10-13 05:13:37,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:37,436 INFO L225 Difference]: With dead ends: 97 [2020-10-13 05:13:37,437 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 05:13:37,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:13:37,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 05:13:37,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-13 05:13:37,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 05:13:37,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2020-10-13 05:13:37,449 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 65 [2020-10-13 05:13:37,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:37,449 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2020-10-13 05:13:37,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:13:37,449 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2020-10-13 05:13:37,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 05:13:37,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:37,450 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:37,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:13:37,450 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:37,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:37,451 INFO L82 PathProgramCache]: Analyzing trace with hash -625661757, now seen corresponding path program 17 times [2020-10-13 05:13:37,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:37,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28961906] [2020-10-13 05:13:37,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:37,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:37,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:37,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:37,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:37,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:37,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:38,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:38,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:38,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:38,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:38,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:38,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:38,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:39,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:39,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:39,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:41,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:42,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:42,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:42,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:42,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 05:13:42,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 05:13:42,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:13:42,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:42,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:13:42,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:13:42,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:13:42,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:42,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:42,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:42,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:42,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:42,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:42,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:42,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:42,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:42,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:42,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:42,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:13:42,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:13:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:42,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:42,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:42,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:42,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:42,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:42,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:42,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:42,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:42,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:42,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:13:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 05:13:42,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28961906] [2020-10-13 05:13:42,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:42,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:13:42,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336119308] [2020-10-13 05:13:42,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:13:42,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:42,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:13:42,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:13:42,774 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 18 states. [2020-10-13 05:13:43,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:43,456 INFO L93 Difference]: Finished difference Result 143 states and 157 transitions. [2020-10-13 05:13:43,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:13:43,457 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-10-13 05:13:43,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:43,459 INFO L225 Difference]: With dead ends: 143 [2020-10-13 05:13:43,459 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 05:13:43,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:13:43,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 05:13:43,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2020-10-13 05:13:43,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 05:13:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-10-13 05:13:43,471 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 68 [2020-10-13 05:13:43,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:43,471 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-10-13 05:13:43,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:13:43,472 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-10-13 05:13:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 05:13:43,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:43,473 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:43,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:13:43,473 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:43,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:43,473 INFO L82 PathProgramCache]: Analyzing trace with hash -849120895, now seen corresponding path program 18 times [2020-10-13 05:13:43,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:43,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142640860] [2020-10-13 05:13:43,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:43,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:43,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:43,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:43,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:43,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:44,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:44,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:44,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:44,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:45,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:45,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:45,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:45,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:46,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:46,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:46,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:46,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:46,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:46,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:46,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:47,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:47,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:47,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:47,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:47,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:48,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:48,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:48,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 05:13:48,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-13 05:13:48,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-13 05:13:48,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:48,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:13:48,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 05:13:48,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 05:13:48,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:48,924 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-10-13 05:13:49,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:49,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:49,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:49,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:49,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:49,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:49,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:49,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:49,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:49,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:49,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:13:49,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:13:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:49,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:49,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:49,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:49,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:49,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:49,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:49,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:49,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:49,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:49,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 14 proven. 92 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 05:13:49,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142640860] [2020-10-13 05:13:49,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:49,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:13:49,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607521656] [2020-10-13 05:13:49,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:13:49,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:49,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:13:49,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:13:49,516 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 27 states. [2020-10-13 05:13:50,283 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2020-10-13 05:13:50,758 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2020-10-13 05:13:51,809 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-10-13 05:13:52,091 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-13 05:13:53,536 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2020-10-13 05:13:55,421 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-13 05:13:56,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:56,568 INFO L93 Difference]: Finished difference Result 196 states and 228 transitions. [2020-10-13 05:13:56,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-10-13 05:13:56,569 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 70 [2020-10-13 05:13:56,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:56,571 INFO L225 Difference]: With dead ends: 196 [2020-10-13 05:13:56,571 INFO L226 Difference]: Without dead ends: 190 [2020-10-13 05:13:56,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6057 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2593, Invalid=13157, Unknown=0, NotChecked=0, Total=15750 [2020-10-13 05:13:56,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-13 05:13:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 125. [2020-10-13 05:13:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 05:13:56,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 153 transitions. [2020-10-13 05:13:56,595 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 153 transitions. Word has length 70 [2020-10-13 05:13:56,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:56,596 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 153 transitions. [2020-10-13 05:13:56,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:13:56,596 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 153 transitions. [2020-10-13 05:13:56,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 05:13:56,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:56,596 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:56,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:13:56,597 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:56,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:56,597 INFO L82 PathProgramCache]: Analyzing trace with hash -892678685, now seen corresponding path program 19 times [2020-10-13 05:13:56,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:56,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89420768] [2020-10-13 05:13:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:56,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:57,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:00,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:01,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:01,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 05:14:01,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:14:01,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:14:01,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:01,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 05:14:01,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:14:01,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 05:14:01,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:02,806 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-13 05:14:03,101 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-13 05:14:03,304 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-13 05:14:03,514 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2020-10-13 05:14:03,921 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2020-10-13 05:14:04,183 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2020-10-13 05:14:04,402 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-13 05:14:04,863 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-13 05:14:05,247 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-13 05:14:05,553 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-10-13 05:14:05,802 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-13 05:14:06,150 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-10-13 05:14:06,426 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-10-13 05:14:06,740 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-13 05:14:07,101 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2020-10-13 05:14:07,377 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-13 05:14:07,662 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-13 05:14:10,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:10,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:10,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:10,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:10,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:10,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:10,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:10,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:10,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:10,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:10,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:10,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:14:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:10,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:10,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:10,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:10,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:10,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:10,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:10,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:10,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:10,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:10,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:14:10,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89420768] [2020-10-13 05:14:10,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:10,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 05:14:10,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982387741] [2020-10-13 05:14:10,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 05:14:10,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:10,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 05:14:10,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2565, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 05:14:10,759 INFO L87 Difference]: Start difference. First operand 125 states and 153 transitions. Second operand 53 states. [2020-10-13 05:14:11,574 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-13 05:14:12,983 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2020-10-13 05:14:13,380 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-13 05:14:13,771 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-13 05:14:14,548 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 71 [2020-10-13 05:14:16,103 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 50 [2020-10-13 05:14:16,762 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 50 [2020-10-13 05:14:17,406 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 53 [2020-10-13 05:14:17,785 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 60 [2020-10-13 05:14:18,253 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 58 [2020-10-13 05:14:18,927 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 56 [2020-10-13 05:14:19,329 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-10-13 05:14:19,678 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 53 [2020-10-13 05:14:20,057 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-13 05:14:20,383 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-13 05:14:20,934 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-13 05:14:21,674 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 66 [2020-10-13 05:14:22,031 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-13 05:14:22,465 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-13 05:14:25,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:25,521 INFO L93 Difference]: Finished difference Result 192 states and 229 transitions. [2020-10-13 05:14:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 05:14:25,523 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 72 [2020-10-13 05:14:25,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:25,526 INFO L225 Difference]: With dead ends: 192 [2020-10-13 05:14:25,526 INFO L226 Difference]: Without dead ends: 186 [2020-10-13 05:14:25,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=627, Invalid=6855, Unknown=0, NotChecked=0, Total=7482 [2020-10-13 05:14:25,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-13 05:14:25,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 153. [2020-10-13 05:14:25,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 05:14:25,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 186 transitions. [2020-10-13 05:14:25,559 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 186 transitions. Word has length 72 [2020-10-13 05:14:25,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:25,559 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 186 transitions. [2020-10-13 05:14:25,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-13 05:14:25,560 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 186 transitions. [2020-10-13 05:14:25,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 05:14:25,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:25,561 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:25,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 05:14:25,561 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:25,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:25,561 INFO L82 PathProgramCache]: Analyzing trace with hash -870046431, now seen corresponding path program 6 times [2020-10-13 05:14:25,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:25,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213290760] [2020-10-13 05:14:25,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:25,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:25,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:25,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:26,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:26,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:26,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:26,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:26,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:26,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:27,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:27,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:29,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:29,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:29,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:29,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:29,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:30,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:30,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:30,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:30,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 05:14:30,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 05:14:30,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-13 05:14:30,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:30,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:14:30,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 05:14:30,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:14:30,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:31,202 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2020-10-13 05:14:31,577 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2020-10-13 05:14:31,833 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-13 05:14:32,185 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 44 [2020-10-13 05:14:32,604 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 48 [2020-10-13 05:14:32,957 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2020-10-13 05:14:33,171 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-10-13 05:14:33,691 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-10-13 05:14:34,002 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2020-10-13 05:14:34,265 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2020-10-13 05:14:34,497 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2020-10-13 05:14:34,660 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 19 [2020-10-13 05:14:35,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:35,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:35,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:35,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:35,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:35,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:35,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:35,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:35,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:35,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:35,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:35,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:14:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:35,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:35,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:35,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:35,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:35,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:35,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:35,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:35,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:35,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:35,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 29 proven. 74 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-10-13 05:14:35,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213290760] [2020-10-13 05:14:35,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:35,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:14:35,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675460517] [2020-10-13 05:14:35,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:14:35,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:35,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:14:35,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:14:35,034 INFO L87 Difference]: Start difference. First operand 153 states and 186 transitions. Second operand 26 states. [2020-10-13 05:14:36,039 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 48 [2020-10-13 05:14:36,539 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-13 05:14:36,861 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-13 05:14:37,272 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2020-10-13 05:14:37,767 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-10-13 05:14:38,215 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-13 05:14:38,444 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-13 05:14:38,824 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-13 05:14:39,653 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-13 05:14:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:39,895 INFO L93 Difference]: Finished difference Result 185 states and 221 transitions. [2020-10-13 05:14:39,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:14:39,897 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-10-13 05:14:39,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:39,899 INFO L225 Difference]: With dead ends: 185 [2020-10-13 05:14:39,899 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 05:14:39,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=252, Invalid=1818, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:14:39,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 05:14:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2020-10-13 05:14:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-13 05:14:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 196 transitions. [2020-10-13 05:14:39,932 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 196 transitions. Word has length 72 [2020-10-13 05:14:39,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:39,933 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 196 transitions. [2020-10-13 05:14:39,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:14:39,933 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 196 transitions. [2020-10-13 05:14:39,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 05:14:39,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:39,934 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:39,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 05:14:39,934 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:39,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:39,935 INFO L82 PathProgramCache]: Analyzing trace with hash 197958085, now seen corresponding path program 20 times [2020-10-13 05:14:39,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:39,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701555410] [2020-10-13 05:14:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:39,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:40,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:44,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:44,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 05:14:44,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:14:44,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 05:14:44,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:44,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:14:44,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 05:14:44,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 05:14:44,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:45,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:45,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:45,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:45,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:45,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:45,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:45,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:45,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:45,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:45,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:45,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:45,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:14:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:45,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:45,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:45,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:45,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:45,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:45,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:45,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:45,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:45,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:45,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 05:14:45,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701555410] [2020-10-13 05:14:45,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:45,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:14:45,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423700823] [2020-10-13 05:14:45,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:14:45,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:45,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:14:45,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:14:45,300 INFO L87 Difference]: Start difference. First operand 161 states and 196 transitions. Second operand 20 states. [2020-10-13 05:14:46,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:46,308 INFO L93 Difference]: Finished difference Result 349 states and 425 transitions. [2020-10-13 05:14:46,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:14:46,310 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2020-10-13 05:14:46,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:46,312 INFO L225 Difference]: With dead ends: 349 [2020-10-13 05:14:46,312 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 05:14:46,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:14:46,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 05:14:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 156. [2020-10-13 05:14:46,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 05:14:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 188 transitions. [2020-10-13 05:14:46,345 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 188 transitions. Word has length 74 [2020-10-13 05:14:46,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:46,345 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 188 transitions. [2020-10-13 05:14:46,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:14:46,346 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 188 transitions. [2020-10-13 05:14:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 05:14:46,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:46,347 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:46,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 05:14:46,347 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:46,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:46,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1215658079, now seen corresponding path program 21 times [2020-10-13 05:14:46,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:46,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436937170] [2020-10-13 05:14:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:46,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:46,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:47,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:48,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking...