/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/simple_built_from_end.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:04:01,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:04:01,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:04:01,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:04:01,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:04:01,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:04:01,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:04:01,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:04:01,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:04:01,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:04:01,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:04:01,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:04:01,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:04:01,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:04:01,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:04:01,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:04:01,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:04:01,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:04:01,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:04:01,976 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:04:01,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:04:01,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:04:01,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:04:01,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:04:01,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:04:01,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:04:01,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:04:01,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:04:02,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:04:02,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:04:02,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:04:02,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:04:02,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:04:02,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:04:02,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:04:02,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:04:02,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:04:02,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:04:02,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:04:02,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:04:02,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:04:02,015 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 05:04:02,053 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:04:02,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:04:02,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:04:02,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:04:02,056 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:04:02,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:04:02,057 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:04:02,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:04:02,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:04:02,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:04:02,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:04:02,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:04:02,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:04:02,059 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:04:02,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:04:02,060 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:04:02,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:04:02,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:04:02,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:04:02,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:04:02,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:04:02,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:04:02,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:04:02,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:04:02,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:04:02,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:04:02,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:04:02,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:04:02,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:04:02,062 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:04:02,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:04:02,378 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:04:02,385 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:04:02,387 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:04:02,387 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:04:02,388 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple_built_from_end.i [2020-10-14 05:04:02,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab42347c1/ca3723fed27a4a8b985e8005167a0b74/FLAGd05b52590 [2020-10-14 05:04:02,946 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:04:02,947 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/simple_built_from_end.i [2020-10-14 05:04:02,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab42347c1/ca3723fed27a4a8b985e8005167a0b74/FLAGd05b52590 [2020-10-14 05:04:03,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab42347c1/ca3723fed27a4a8b985e8005167a0b74 [2020-10-14 05:04:03,223 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:04:03,225 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:04:03,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:04:03,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:04:03,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:04:03,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:04:03" (1/1) ... [2020-10-14 05:04:03,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b88a15d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:03, skipping insertion in model container [2020-10-14 05:04:03,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:04:03" (1/1) ... [2020-10-14 05:04:03,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:04:03,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:04:03,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:04:03,717 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:04:03,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:04:03,829 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:04:03,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:03 WrapperNode [2020-10-14 05:04:03,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:04:03,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:04:03,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:04:03,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:04:03,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:03" (1/1) ... [2020-10-14 05:04:03,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:03" (1/1) ... [2020-10-14 05:04:03,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:03" (1/1) ... [2020-10-14 05:04:03,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:03" (1/1) ... [2020-10-14 05:04:03,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:03" (1/1) ... [2020-10-14 05:04:03,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:03" (1/1) ... [2020-10-14 05:04:03,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:03" (1/1) ... [2020-10-14 05:04:03,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:04:03,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:04:03,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:04:03,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:04:03,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:03" (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 [2020-10-14 05:04:03,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:04:03,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:04:03,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 05:04:03,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 05:04:03,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-14 05:04:03,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-14 05:04:03,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-14 05:04:03,954 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-14 05:04:03,954 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:04:03,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:04:03,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:04:03,955 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 05:04:03,955 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 05:04:03,955 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 05:04:03,955 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 05:04:03,956 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 05:04:03,956 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 05:04:03,956 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 05:04:03,957 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 05:04:03,957 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 05:04:03,958 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 05:04:03,959 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 05:04:03,959 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 05:04:03,959 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 05:04:03,960 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 05:04:03,961 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 05:04:03,961 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 05:04:03,961 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 05:04:03,961 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 05:04:03,962 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-14 05:04:03,962 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-14 05:04:03,962 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-14 05:04:03,962 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 05:04:03,962 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 05:04:03,962 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 05:04:03,962 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 05:04:03,963 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 05:04:03,963 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 05:04:03,963 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 05:04:03,965 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 05:04:03,965 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 05:04:03,965 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 05:04:03,965 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 05:04:03,965 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 05:04:03,965 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 05:04:03,967 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 05:04:03,967 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 05:04:03,967 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 05:04:03,967 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 05:04:03,967 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 05:04:03,968 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 05:04:03,968 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 05:04:03,968 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 05:04:03,968 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 05:04:03,968 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 05:04:03,968 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 05:04:03,969 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 05:04:03,969 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 05:04:03,969 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 05:04:03,969 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 05:04:03,969 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 05:04:03,969 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 05:04:03,969 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 05:04:03,970 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 05:04:03,970 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 05:04:03,970 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 05:04:03,970 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 05:04:03,970 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 05:04:03,971 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 05:04:03,973 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 05:04:03,973 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 05:04:03,974 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 05:04:03,974 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 05:04:03,974 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 05:04:03,974 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:04:03,974 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 05:04:03,974 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 05:04:03,975 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 05:04:03,975 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 05:04:03,975 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 05:04:03,975 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 05:04:03,975 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 05:04:03,975 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 05:04:03,975 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 05:04:03,975 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 05:04:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 05:04:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 05:04:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 05:04:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 05:04:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 05:04:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 05:04:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 05:04:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 05:04:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 05:04:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 05:04:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 05:04:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 05:04:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 05:04:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 05:04:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 05:04:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 05:04:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 05:04:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 05:04:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 05:04:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 05:04:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 05:04:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 05:04:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 05:04:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 05:04:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 05:04:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 05:04:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 05:04:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 05:04:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 05:04:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 05:04:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 05:04:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 05:04:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 05:04:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-14 05:04:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:04:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 05:04:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 05:04:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 05:04:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 05:04:03,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 05:04:03,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:04:03,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:04:03,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 05:04:04,326 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-14 05:04:04,421 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:04:04,421 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 05:04:04,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:04:04 BoogieIcfgContainer [2020-10-14 05:04:04,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:04:04,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:04:04,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:04:04,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:04:04,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:04:03" (1/3) ... [2020-10-14 05:04:04,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3203f459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:04:04, skipping insertion in model container [2020-10-14 05:04:04,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:03" (2/3) ... [2020-10-14 05:04:04,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3203f459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:04:04, skipping insertion in model container [2020-10-14 05:04:04,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:04:04" (3/3) ... [2020-10-14 05:04:04,433 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2020-10-14 05:04:04,444 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:04:04,451 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:04:04,465 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:04:04,487 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:04:04,488 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:04:04,488 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:04:04,488 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:04:04,488 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:04:04,489 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:04:04,489 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:04:04,489 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:04:04,506 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-14 05:04:04,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:04:04,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:04,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:04,514 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:04,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:04,519 INFO L82 PathProgramCache]: Analyzing trace with hash 442801557, now seen corresponding path program 1 times [2020-10-14 05:04:04,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:04,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547243614] [2020-10-14 05:04:04,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:04,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:04,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:04,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:04,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:04:04,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:04:04,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-14 05:04:04,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:04,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:04,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:04,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:04:04,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:04,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 05:04:04,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:04,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:04,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:04,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:04,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:04,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 05:04:04,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:04,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:04,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:04,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:04,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:04,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:04,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547243614] [2020-10-14 05:04:04,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:04:04,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:04:04,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64141433] [2020-10-14 05:04:04,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:04:04,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:04,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:04:04,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:04:04,865 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-14 05:04:04,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:04,959 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2020-10-14 05:04:04,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:04:04,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-14 05:04:04,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:04,978 INFO L225 Difference]: With dead ends: 40 [2020-10-14 05:04:04,978 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:04:04,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:04:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:04:05,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2020-10-14 05:04:05,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 05:04:05,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-14 05:04:05,026 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-10-14 05:04:05,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:05,026 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-14 05:04:05,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:04:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-14 05:04:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-14 05:04:05,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:05,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:05,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:04:05,030 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:05,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:05,030 INFO L82 PathProgramCache]: Analyzing trace with hash 827465055, now seen corresponding path program 1 times [2020-10-14 05:04:05,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:05,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957071016] [2020-10-14 05:04:05,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:05,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:05,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:05,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-14 05:04:05,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:05,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-14 05:04:05,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:05,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:05,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:04:05,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:05,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:04:05,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:05,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:05,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:05,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:05,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:05,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:05,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 05:04:05,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:05,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:05,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:05,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:05,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:05,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:05,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957071016] [2020-10-14 05:04:05,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:04:05,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:04:05,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565182272] [2020-10-14 05:04:05,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:04:05,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:05,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:04:05,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:04:05,268 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-14 05:04:05,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:05,315 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-10-14 05:04:05,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:04:05,316 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-14 05:04:05,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:05,317 INFO L225 Difference]: With dead ends: 25 [2020-10-14 05:04:05,317 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 05:04:05,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:04:05,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 05:04:05,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-14 05:04:05,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 05:04:05,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-14 05:04:05,324 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2020-10-14 05:04:05,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:05,324 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-14 05:04:05,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:04:05,325 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-14 05:04:05,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 05:04:05,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:05,326 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:05,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:04:05,326 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:05,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:05,327 INFO L82 PathProgramCache]: Analyzing trace with hash -589997544, now seen corresponding path program 1 times [2020-10-14 05:04:05,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:05,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311304784] [2020-10-14 05:04:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:05,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:05,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:05,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 05:04:05,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:05,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-14 05:04:05,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:05,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:05,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:04:05,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:04:05,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:04:05,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:05,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:05,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:05,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:05,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:05,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:05,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 05:04:05,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:05,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:05,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:05,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:05,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:05,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:05,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311304784] [2020-10-14 05:04:05,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:04:05,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 05:04:05,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228563426] [2020-10-14 05:04:05,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:04:05,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:05,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:04:05,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:04:05,565 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-14 05:04:05,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:05,641 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-10-14 05:04:05,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:04:05,642 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-14 05:04:05,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:05,643 INFO L225 Difference]: With dead ends: 24 [2020-10-14 05:04:05,643 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:04:05,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:04:05,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:04:05,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-10-14 05:04:05,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 05:04:05,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-14 05:04:05,648 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-10-14 05:04:05,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:05,649 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-14 05:04:05,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:04:05,649 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-14 05:04:05,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:04:05,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:05,650 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:05,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:04:05,650 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:05,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:05,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1605849708, now seen corresponding path program 1 times [2020-10-14 05:04:05,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:05,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255010376] [2020-10-14 05:04:05,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:05,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:05,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:05,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:04:05,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:05,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-14 05:04:05,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:05,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:05,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:04:05,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:05,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:04:05,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:05,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:05,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:05,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:05,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:05,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:05,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:04:05,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:05,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:05,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:05,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:05,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:05,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:05,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255010376] [2020-10-14 05:04:05,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:05,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:04:05,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712941042] [2020-10-14 05:04:05,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:04:05,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:05,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:04:05,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:04:05,803 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-10-14 05:04:05,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:05,878 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-14 05:04:05,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:04:05,878 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-14 05:04:05,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:05,879 INFO L225 Difference]: With dead ends: 34 [2020-10-14 05:04:05,879 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 05:04:05,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:04:05,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 05:04:05,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-14 05:04:05,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 05:04:05,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-14 05:04:05,886 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2020-10-14 05:04:05,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:05,886 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-14 05:04:05,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:04:05,887 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-14 05:04:05,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:04:05,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:05,888 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:05,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:04:05,888 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:05,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:05,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1671651003, now seen corresponding path program 2 times [2020-10-14 05:04:05,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:05,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599093644] [2020-10-14 05:04:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:05,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:06,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:06,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:04:06,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:06,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-14 05:04:06,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:06,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:06,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:04:06,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:04:06,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:04:06,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:06,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:06,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:06,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:06,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:06,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:06,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:04:06,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:06,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:06,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:06,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:06,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:06,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:06,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:06,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599093644] [2020-10-14 05:04:06,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:06,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:04:06,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682544802] [2020-10-14 05:04:06,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:04:06,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:06,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:04:06,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:04:06,182 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2020-10-14 05:04:06,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:06,440 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-14 05:04:06,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:04:06,440 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-14 05:04:06,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:06,441 INFO L225 Difference]: With dead ends: 31 [2020-10-14 05:04:06,441 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 05:04:06,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:04:06,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 05:04:06,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-14 05:04:06,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 05:04:06,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-14 05:04:06,451 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2020-10-14 05:04:06,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:06,451 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-14 05:04:06,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:04:06,451 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-14 05:04:06,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:04:06,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:06,453 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:06,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:04:06,453 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:06,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:06,454 INFO L82 PathProgramCache]: Analyzing trace with hash 14041617, now seen corresponding path program 3 times [2020-10-14 05:04:06,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:06,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909181656] [2020-10-14 05:04:06,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:06,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:06,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:06,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:04:06,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:06,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-14 05:04:06,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:06,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:06,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:04:06,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:06,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:04:06,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:07,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:07,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:07,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:07,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:07,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:07,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:04:07,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:07,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:07,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:07,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:07,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:07,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:07,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909181656] [2020-10-14 05:04:07,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:07,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:04:07,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795716468] [2020-10-14 05:04:07,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:04:07,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:07,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:04:07,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:04:07,027 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 9 states. [2020-10-14 05:04:07,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:07,179 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-14 05:04:07,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:04:07,180 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-14 05:04:07,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:07,182 INFO L225 Difference]: With dead ends: 44 [2020-10-14 05:04:07,182 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 05:04:07,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:04:07,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 05:04:07,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-14 05:04:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 05:04:07,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-14 05:04:07,191 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2020-10-14 05:04:07,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:07,192 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-14 05:04:07,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:04:07,192 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-14 05:04:07,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 05:04:07,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:07,194 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:07,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:04:07,195 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:07,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:07,195 INFO L82 PathProgramCache]: Analyzing trace with hash 663766794, now seen corresponding path program 4 times [2020-10-14 05:04:07,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:07,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993288328] [2020-10-14 05:04:07,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:07,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:07,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:07,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:04:07,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:07,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-14 05:04:07,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:07,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:07,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:04:07,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:04:07,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:04:07,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:08,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:08,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:08,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:08,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:08,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:08,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 05:04:08,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:08,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:08,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:08,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:08,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:08,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:08,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993288328] [2020-10-14 05:04:08,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:08,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:04:08,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760712849] [2020-10-14 05:04:08,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:04:08,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:08,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:04:08,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:04:08,089 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-10-14 05:04:08,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:08,814 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-10-14 05:04:08,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:04:08,814 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-14 05:04:08,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:08,815 INFO L225 Difference]: With dead ends: 38 [2020-10-14 05:04:08,815 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 05:04:08,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:04:08,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 05:04:08,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-14 05:04:08,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 05:04:08,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-14 05:04:08,826 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2020-10-14 05:04:08,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:08,827 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-14 05:04:08,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:04:08,827 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-14 05:04:08,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:04:08,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:08,829 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:08,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:04:08,830 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:08,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:08,830 INFO L82 PathProgramCache]: Analyzing trace with hash 251937634, now seen corresponding path program 5 times [2020-10-14 05:04:08,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:08,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637113888] [2020-10-14 05:04:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:08,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:09,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:09,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:04:09,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:09,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-14 05:04:09,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:09,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:09,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:04:09,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:09,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:04:09,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:09,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:09,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:09,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:09,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:09,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:09,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 05:04:09,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:09,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:09,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:09,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:09,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:09,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:09,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637113888] [2020-10-14 05:04:09,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:09,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:04:09,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858822503] [2020-10-14 05:04:09,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:04:09,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:09,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:04:09,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:04:09,666 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-10-14 05:04:09,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:09,905 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-14 05:04:09,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:04:09,905 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-14 05:04:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:09,908 INFO L225 Difference]: With dead ends: 54 [2020-10-14 05:04:09,908 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 05:04:09,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:04:09,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 05:04:09,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-14 05:04:09,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:04:09,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-14 05:04:09,916 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2020-10-14 05:04:09,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:09,916 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-14 05:04:09,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:04:09,917 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-14 05:04:09,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:04:09,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:09,920 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:09,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:04:09,920 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:09,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:09,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1371694153, now seen corresponding path program 6 times [2020-10-14 05:04:09,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:09,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467004758] [2020-10-14 05:04:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:09,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:10,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:10,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:04:10,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:10,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 683 [2020-10-14 05:04:10,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:10,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:10,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:04:10,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:04:10,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 05:04:10,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:11,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:11,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:11,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:11,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:11,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:11,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 05:04:11,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:11,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:11,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:11,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:11,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:11,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:11,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467004758] [2020-10-14 05:04:11,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:11,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:04:11,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143489219] [2020-10-14 05:04:11,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:04:11,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:11,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:04:11,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:04:11,099 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 15 states. [2020-10-14 05:04:11,565 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-14 05:04:11,865 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-14 05:04:12,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:12,308 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-10-14 05:04:12,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:04:12,309 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-14 05:04:12,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:12,309 INFO L225 Difference]: With dead ends: 45 [2020-10-14 05:04:12,310 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 05:04:12,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:04:12,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 05:04:12,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-10-14 05:04:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 05:04:12,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-14 05:04:12,324 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2020-10-14 05:04:12,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:12,325 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-14 05:04:12,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:04:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-14 05:04:12,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 05:04:12,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:12,328 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:12,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:04:12,331 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:12,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:12,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1826466243, now seen corresponding path program 7 times [2020-10-14 05:04:12,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:12,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968775834] [2020-10-14 05:04:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:12,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:12,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:12,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 05:04:12,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:12,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 543 [2020-10-14 05:04:12,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:12,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:12,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:04:12,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:12,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:04:12,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:13,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:13,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:13,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:13,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:13,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:13,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:13,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:13,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:13,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:13,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:13,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:13,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:13,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968775834] [2020-10-14 05:04:13,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:13,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:04:13,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363066346] [2020-10-14 05:04:13,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:04:13,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:13,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:04:13,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:04:13,348 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 15 states. [2020-10-14 05:04:13,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:13,797 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-14 05:04:13,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:04:13,797 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-14 05:04:13,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:13,798 INFO L225 Difference]: With dead ends: 64 [2020-10-14 05:04:13,798 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 05:04:13,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:04:13,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 05:04:13,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-14 05:04:13,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 05:04:13,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-14 05:04:13,805 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2020-10-14 05:04:13,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:13,806 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-14 05:04:13,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:04:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-14 05:04:13,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 05:04:13,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:13,807 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:13,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:04:13,808 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:13,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:13,808 INFO L82 PathProgramCache]: Analyzing trace with hash 439027452, now seen corresponding path program 8 times [2020-10-14 05:04:13,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:13,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423566972] [2020-10-14 05:04:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:13,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:14,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:14,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 05:04:14,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:14,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 891 [2020-10-14 05:04:14,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:14,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:14,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:04:14,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:04:14,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 05:04:14,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:15,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:15,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:15,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:15,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:15,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:15,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:15,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:15,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:15,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:15,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:15,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:15,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:15,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423566972] [2020-10-14 05:04:15,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:15,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:04:15,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567511243] [2020-10-14 05:04:15,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:04:15,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:15,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:04:15,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:04:15,576 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 18 states. [2020-10-14 05:04:16,372 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2020-10-14 05:04:16,515 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-14 05:04:16,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:16,969 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-10-14 05:04:16,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:04:16,969 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-14 05:04:16,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:16,970 INFO L225 Difference]: With dead ends: 52 [2020-10-14 05:04:16,971 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 05:04:16,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:04:16,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 05:04:16,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-14 05:04:16,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 05:04:16,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-14 05:04:16,979 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2020-10-14 05:04:16,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:16,980 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-14 05:04:16,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:04:16,980 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-14 05:04:16,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:04:16,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:16,981 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:16,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:04:16,981 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:16,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:16,981 INFO L82 PathProgramCache]: Analyzing trace with hash 896214576, now seen corresponding path program 9 times [2020-10-14 05:04:16,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:16,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126242026] [2020-10-14 05:04:16,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:17,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:17,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:17,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:04:17,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:17,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 784 [2020-10-14 05:04:17,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:17,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:17,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:04:17,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:17,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 05:04:17,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:18,548 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-14 05:04:18,732 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2020-10-14 05:04:19,041 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 31 [2020-10-14 05:04:19,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:19,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:19,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:19,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:19,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:19,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:19,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:19,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:19,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:19,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:19,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:19,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 5 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:19,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126242026] [2020-10-14 05:04:19,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:19,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:04:19,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430898749] [2020-10-14 05:04:19,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:04:19,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:19,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:04:19,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:04:19,371 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2020-10-14 05:04:19,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:19,942 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-14 05:04:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:04:19,943 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-10-14 05:04:19,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:19,944 INFO L225 Difference]: With dead ends: 74 [2020-10-14 05:04:19,944 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 05:04:19,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:04:19,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 05:04:19,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-10-14 05:04:19,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 05:04:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-14 05:04:19,952 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2020-10-14 05:04:19,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:19,953 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-14 05:04:19,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:04:19,953 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-14 05:04:19,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:04:19,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:19,954 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:19,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:04:19,954 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:19,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:19,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1441670871, now seen corresponding path program 10 times [2020-10-14 05:04:19,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:19,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120214411] [2020-10-14 05:04:19,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:20,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:21,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:21,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:04:21,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:21,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1165 [2020-10-14 05:04:21,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:21,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:21,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:04:21,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:04:21,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 05:04:21,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:22,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:22,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:22,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:22,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:22,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:22,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:22,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:22,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:22,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:22,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:22,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:22,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 20 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:22,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120214411] [2020-10-14 05:04:22,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:22,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:04:22,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623240316] [2020-10-14 05:04:22,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:04:22,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:22,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:04:22,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:04:22,089 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 21 states. [2020-10-14 05:04:22,841 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-14 05:04:23,000 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2020-10-14 05:04:23,184 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2020-10-14 05:04:23,342 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2020-10-14 05:04:24,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:24,078 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-10-14 05:04:24,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 05:04:24,079 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-14 05:04:24,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:24,080 INFO L225 Difference]: With dead ends: 59 [2020-10-14 05:04:24,080 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 05:04:24,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 05:04:24,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 05:04:24,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-10-14 05:04:24,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 05:04:24,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-14 05:04:24,088 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2020-10-14 05:04:24,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:24,088 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-14 05:04:24,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:04:24,088 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-14 05:04:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 05:04:24,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:24,089 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:24,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:04:24,090 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:24,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:24,090 INFO L82 PathProgramCache]: Analyzing trace with hash -851233675, now seen corresponding path program 11 times [2020-10-14 05:04:24,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:24,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990420696] [2020-10-14 05:04:24,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:24,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:25,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:25,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:04:25,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:25,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1511 [2020-10-14 05:04:25,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:25,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:25,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:04:25,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:25,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 05:04:25,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:26,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:26,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:26,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:26,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:26,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:26,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:26,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:26,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:26,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:26,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:26,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:26,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 6 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:26,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990420696] [2020-10-14 05:04:26,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:26,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:04:26,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230124229] [2020-10-14 05:04:26,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:04:26,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:26,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:04:26,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:04:26,411 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 21 states. [2020-10-14 05:04:26,939 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-14 05:04:27,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:27,238 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-14 05:04:27,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:04:27,239 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-14 05:04:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:27,240 INFO L225 Difference]: With dead ends: 84 [2020-10-14 05:04:27,240 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 05:04:27,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:04:27,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 05:04:27,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-14 05:04:27,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 05:04:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-14 05:04:27,251 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2020-10-14 05:04:27,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:27,251 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-14 05:04:27,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:04:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-14 05:04:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 05:04:27,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:27,253 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:27,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:04:27,254 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:27,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:27,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1732540910, now seen corresponding path program 12 times [2020-10-14 05:04:27,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:27,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981775178] [2020-10-14 05:04:27,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:27,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:29,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:29,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 05:04:29,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:29,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1801 [2020-10-14 05:04:29,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:29,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:29,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:04:29,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:04:29,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 05:04:29,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:29,811 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-10-14 05:04:30,099 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2020-10-14 05:04:30,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:30,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:30,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:30,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:30,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:30,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:30,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:30,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:30,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:30,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:30,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:30,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 28 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:30,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981775178] [2020-10-14 05:04:30,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:30,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:04:30,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211308926] [2020-10-14 05:04:30,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:04:30,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:30,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:04:30,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:04:30,717 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 24 states. [2020-10-14 05:04:31,644 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-14 05:04:31,867 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 75 [2020-10-14 05:04:32,141 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 85 [2020-10-14 05:04:32,383 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 93 [2020-10-14 05:04:32,720 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 103 [2020-10-14 05:04:32,959 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 95 [2020-10-14 05:04:33,166 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2020-10-14 05:04:33,327 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2020-10-14 05:04:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:34,038 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2020-10-14 05:04:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:04:34,038 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-10-14 05:04:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:34,039 INFO L225 Difference]: With dead ends: 66 [2020-10-14 05:04:34,039 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 05:04:34,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=577, Invalid=1873, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 05:04:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 05:04:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-10-14 05:04:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 05:04:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-14 05:04:34,052 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 57 [2020-10-14 05:04:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:34,053 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-14 05:04:34,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:04:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-14 05:04:34,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:04:34,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:34,054 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:34,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:04:34,055 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:34,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1509062142, now seen corresponding path program 13 times [2020-10-14 05:04:34,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:34,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948537592] [2020-10-14 05:04:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:34,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:35,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:35,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:04:35,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:35,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1824 [2020-10-14 05:04:35,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:35,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:35,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:04:35,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:35,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 05:04:35,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:36,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:36,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:36,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:36,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:36,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:36,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:36,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:36,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:36,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:36,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:36,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:36,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 7 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:37,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948537592] [2020-10-14 05:04:37,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:37,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:04:37,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593698123] [2020-10-14 05:04:37,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:04:37,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:37,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:04:37,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:04:37,002 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 24 states. [2020-10-14 05:04:37,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:37,856 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-14 05:04:37,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:04:37,857 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 60 [2020-10-14 05:04:37,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:37,858 INFO L225 Difference]: With dead ends: 94 [2020-10-14 05:04:37,858 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 05:04:37,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:04:37,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 05:04:37,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-10-14 05:04:37,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:04:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-14 05:04:37,867 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2020-10-14 05:04:37,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:37,867 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-14 05:04:37,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:04:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-14 05:04:37,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:04:37,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:37,869 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:37,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:04:37,869 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:37,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:37,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2002241125, now seen corresponding path program 14 times [2020-10-14 05:04:37,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:37,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148312935] [2020-10-14 05:04:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:37,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:40,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:40,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:04:40,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:40,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2559 [2020-10-14 05:04:40,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:40,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:40,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:04:40,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:04:40,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 05:04:40,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:41,338 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-14 05:04:41,716 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-10-14 05:04:41,874 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-14 05:04:42,179 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 76 [2020-10-14 05:04:42,407 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 64 [2020-10-14 05:04:42,838 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 68 [2020-10-14 05:04:43,104 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2020-10-14 05:04:43,346 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 50 [2020-10-14 05:04:43,558 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2020-10-14 05:04:43,733 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-14 05:04:43,901 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-10-14 05:04:44,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:44,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:44,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:44,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:44,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:44,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:44,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:44,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:44,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:44,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:44,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:44,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 28 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:44,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148312935] [2020-10-14 05:04:44,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:44,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:04:44,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675297467] [2020-10-14 05:04:44,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:04:44,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:44,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:04:44,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:04:44,256 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 27 states. [2020-10-14 05:04:45,115 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-10-14 05:04:45,337 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2020-10-14 05:04:45,546 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2020-10-14 05:04:45,794 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 89 [2020-10-14 05:04:46,084 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 100 [2020-10-14 05:04:46,347 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 99 [2020-10-14 05:04:46,702 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 110 [2020-10-14 05:04:47,020 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 125 [2020-10-14 05:04:47,509 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 141 [2020-10-14 05:04:47,841 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 127 [2020-10-14 05:04:48,155 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 112 [2020-10-14 05:04:48,432 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 114 [2020-10-14 05:04:48,671 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 93 [2020-10-14 05:04:48,894 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 95 [2020-10-14 05:04:49,208 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-10-14 05:04:49,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:49,837 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-10-14 05:04:49,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 05:04:49,838 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2020-10-14 05:04:49,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:49,839 INFO L225 Difference]: With dead ends: 73 [2020-10-14 05:04:49,839 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 05:04:49,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=725, Invalid=2467, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 05:04:49,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 05:04:49,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-14 05:04:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 05:04:49,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-14 05:04:49,848 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2020-10-14 05:04:49,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:49,849 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-14 05:04:49,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:04:49,849 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-14 05:04:49,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 05:04:49,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:49,850 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:49,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:04:49,850 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:49,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:49,851 INFO L82 PathProgramCache]: Analyzing trace with hash 264356391, now seen corresponding path program 15 times [2020-10-14 05:04:49,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:49,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996828410] [2020-10-14 05:04:49,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:49,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:51,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:51,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 05:04:51,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:51,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1945 [2020-10-14 05:04:51,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:51,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:51,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:04:51,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:51,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 05:04:51,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:52,750 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-14 05:04:52,904 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-14 05:04:53,274 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2020-10-14 05:04:53,503 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-14 05:04:53,866 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 82 [2020-10-14 05:04:54,132 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 70 [2020-10-14 05:04:54,454 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 66 [2020-10-14 05:04:54,684 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 53 [2020-10-14 05:04:54,898 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 47 [2020-10-14 05:04:55,103 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 44 [2020-10-14 05:04:55,333 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2020-10-14 05:04:55,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:55,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:55,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:55,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:55,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:55,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:55,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:55,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:55,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:55,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:55,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:55,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 8 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:55,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996828410] [2020-10-14 05:04:55,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:55,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:04:55,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929127476] [2020-10-14 05:04:55,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:04:55,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:55,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:04:55,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:04:55,810 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 27 states. [2020-10-14 05:04:56,368 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-14 05:04:56,813 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 89 [2020-10-14 05:04:57,035 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-14 05:04:57,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:57,508 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-10-14 05:04:57,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:04:57,508 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 67 [2020-10-14 05:04:57,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:57,510 INFO L225 Difference]: With dead ends: 104 [2020-10-14 05:04:57,510 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 05:04:57,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:04:57,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 05:04:57,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-10-14 05:04:57,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 05:04:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-14 05:04:57,520 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2020-10-14 05:04:57,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:57,520 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-14 05:04:57,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:04:57,520 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-14 05:04:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 05:04:57,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:57,521 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:57,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:04:57,522 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:57,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:57,522 INFO L82 PathProgramCache]: Analyzing trace with hash 811302880, now seen corresponding path program 16 times [2020-10-14 05:04:57,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:57,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746235115] [2020-10-14 05:04:57,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:57,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:01,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:01,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 05:05:01,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:01,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3414 [2020-10-14 05:05:01,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:01,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:01,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:05:01,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:05:01,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-14 05:05:01,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:01,859 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-14 05:05:02,010 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-14 05:05:02,284 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2020-10-14 05:05:02,436 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-14 05:05:02,702 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 73 [2020-10-14 05:05:02,916 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 63 [2020-10-14 05:05:03,272 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 83 [2020-10-14 05:05:03,498 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 70 [2020-10-14 05:05:03,746 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 69 [2020-10-14 05:05:04,082 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2020-10-14 05:05:04,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:04,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:04,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:04,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:04,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:04,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:04,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:04,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:04,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:04,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:04,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:04,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 32 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:04,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746235115] [2020-10-14 05:05:04,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:04,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:05:04,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555173805] [2020-10-14 05:05:04,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:05:04,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:04,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:05:04,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:05:04,923 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 30 states. [2020-10-14 05:05:06,046 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-14 05:05:06,254 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-14 05:05:06,483 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-10-14 05:05:06,810 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 96 [2020-10-14 05:05:07,071 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-14 05:05:07,461 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 111 [2020-10-14 05:05:07,741 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2020-10-14 05:05:08,179 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 123 [2020-10-14 05:05:08,533 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 119 [2020-10-14 05:05:09,057 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 145 [2020-10-14 05:05:09,425 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 121 [2020-10-14 05:05:09,671 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86 [2020-10-14 05:05:09,872 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2020-10-14 05:05:10,038 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-10-14 05:05:10,194 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-14 05:05:11,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:11,224 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2020-10-14 05:05:11,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 05:05:11,224 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 71 [2020-10-14 05:05:11,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:11,226 INFO L225 Difference]: With dead ends: 80 [2020-10-14 05:05:11,226 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 05:05:11,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=827, Invalid=3205, Unknown=0, NotChecked=0, Total=4032 [2020-10-14 05:05:11,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 05:05:11,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-10-14 05:05:11,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 05:05:11,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-14 05:05:11,235 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2020-10-14 05:05:11,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:11,236 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-14 05:05:11,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:05:11,236 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-14 05:05:11,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 05:05:11,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:11,237 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:11,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:05:11,237 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:11,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:11,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1747931852, now seen corresponding path program 17 times [2020-10-14 05:05:11,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:11,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263538524] [2020-10-14 05:05:11,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:11,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:14,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:14,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 05:05:14,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:14,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2910 [2020-10-14 05:05:14,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:14,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:14,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:05:14,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:14,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-14 05:05:14,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:15,089 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-14 05:05:15,407 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-14 05:05:15,582 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-10-14 05:05:15,898 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 84 [2020-10-14 05:05:16,117 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2020-10-14 05:05:16,390 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 76 [2020-10-14 05:05:17,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:17,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:17,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:17,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:17,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:17,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:17,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:17,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:17,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:17,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:17,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:17,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 9 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:17,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263538524] [2020-10-14 05:05:17,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:17,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:05:17,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863901791] [2020-10-14 05:05:17,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:05:17,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:17,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:05:17,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:05:17,393 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 30 states. [2020-10-14 05:05:18,607 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 100 [2020-10-14 05:05:19,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:19,174 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-10-14 05:05:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:05:19,175 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 74 [2020-10-14 05:05:19,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:19,176 INFO L225 Difference]: With dead ends: 114 [2020-10-14 05:05:19,176 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 05:05:19,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:05:19,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 05:05:19,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-10-14 05:05:19,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 05:05:19,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-14 05:05:19,185 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2020-10-14 05:05:19,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:19,185 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-14 05:05:19,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:05:19,186 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-14 05:05:19,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 05:05:19,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:19,186 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:19,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:05:19,187 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:19,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:19,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1766875891, now seen corresponding path program 18 times [2020-10-14 05:05:19,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:19,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452584169] [2020-10-14 05:05:19,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:19,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:19,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:23,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:23,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 05:05:23,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:23,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4426 [2020-10-14 05:05:23,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:23,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:23,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 05:05:23,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:05:23,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 05:05:23,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:25,056 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-14 05:05:25,349 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-14 05:05:25,534 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 52 [2020-10-14 05:05:25,903 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 70 [2020-10-14 05:05:26,220 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 65 [2020-10-14 05:05:26,811 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 81 [2020-10-14 05:05:27,170 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 71 [2020-10-14 05:05:27,848 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 91 [2020-10-14 05:05:28,348 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 81 [2020-10-14 05:05:29,198 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 98 [2020-10-14 05:05:29,799 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 81 [2020-10-14 05:05:30,417 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 77 [2020-10-14 05:05:30,903 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 60 [2020-10-14 05:05:31,429 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 57 [2020-10-14 05:05:31,723 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 51 [2020-10-14 05:05:31,965 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 47 [2020-10-14 05:05:32,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:32,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:32,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:32,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:32,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:32,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:32,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:32,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:32,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:32,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:32,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:32,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 36 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:32,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452584169] [2020-10-14 05:05:32,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:32,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 05:05:32,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494720336] [2020-10-14 05:05:32,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 05:05:32,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:32,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 05:05:32,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:05:32,787 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 33 states. [2020-10-14 05:05:34,033 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-14 05:05:34,296 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-14 05:05:34,569 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2020-10-14 05:05:34,924 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 86 [2020-10-14 05:05:35,319 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 102 [2020-10-14 05:05:35,726 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 104 [2020-10-14 05:05:36,362 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 134 [2020-10-14 05:05:36,889 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 127 [2020-10-14 05:05:37,754 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 157 [2020-10-14 05:05:38,412 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 146 [2020-10-14 05:05:39,484 WARN L193 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 175 [2020-10-14 05:05:40,261 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 171 [2020-10-14 05:05:41,435 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 375 DAG size of output: 201 [2020-10-14 05:05:42,139 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 173 [2020-10-14 05:05:42,717 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 141 [2020-10-14 05:05:43,192 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 144 [2020-10-14 05:05:43,488 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 106 [2020-10-14 05:05:43,778 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 108 [2020-10-14 05:05:44,024 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 91 [2020-10-14 05:05:44,279 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 93 [2020-10-14 05:05:44,462 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-14 05:05:44,649 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-14 05:05:45,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:45,657 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2020-10-14 05:05:45,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 05:05:45,658 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 78 [2020-10-14 05:05:45,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:45,659 INFO L225 Difference]: With dead ends: 87 [2020-10-14 05:05:45,660 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 05:05:45,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=1016, Invalid=3954, Unknown=0, NotChecked=0, Total=4970 [2020-10-14 05:05:45,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 05:05:45,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-14 05:05:45,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 05:05:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-14 05:05:45,670 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 78 [2020-10-14 05:05:45,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:45,670 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-14 05:05:45,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 05:05:45,670 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-14 05:05:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 05:05:45,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:45,671 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:45,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:05:45,671 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:45,672 INFO L82 PathProgramCache]: Analyzing trace with hash -2114702631, now seen corresponding path program 19 times [2020-10-14 05:05:45,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:45,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503793595] [2020-10-14 05:05:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:45,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:45,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:49,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:49,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 05:05:49,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:49,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4035 [2020-10-14 05:05:49,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:49,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:49,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:05:49,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:49,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 05:05:49,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:50,657 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-14 05:05:50,978 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-14 05:05:51,201 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-14 05:05:51,548 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 74 [2020-10-14 05:05:51,726 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-10-14 05:05:52,123 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 81 [2020-10-14 05:05:52,321 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-14 05:05:52,737 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 90 [2020-10-14 05:05:53,003 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 78 [2020-10-14 05:05:53,278 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 80 [2020-10-14 05:05:54,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:54,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:54,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:54,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:54,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:54,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:54,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:54,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:54,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:54,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:54,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:54,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 10 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:54,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503793595] [2020-10-14 05:05:54,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:54,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 05:05:54,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147615743] [2020-10-14 05:05:54,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 05:05:54,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:54,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 05:05:54,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:05:54,473 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 33 states. [2020-10-14 05:05:55,517 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2020-10-14 05:05:55,967 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2020-10-14 05:05:56,723 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-14 05:05:57,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:57,640 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2020-10-14 05:05:57,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:05:57,642 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 81 [2020-10-14 05:05:57,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:57,643 INFO L225 Difference]: With dead ends: 124 [2020-10-14 05:05:57,643 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 05:05:57,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:05:57,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 05:05:57,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-14 05:05:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-14 05:05:57,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-10-14 05:05:57,652 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 81 [2020-10-14 05:05:57,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:57,653 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-10-14 05:05:57,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 05:05:57,653 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-10-14 05:05:57,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 05:05:57,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:57,654 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:57,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:05:57,654 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:57,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:57,654 INFO L82 PathProgramCache]: Analyzing trace with hash 265222354, now seen corresponding path program 20 times [2020-10-14 05:05:57,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:57,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877894665] [2020-10-14 05:05:57,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:57,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:02,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:02,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 05:06:02,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:02,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4812 [2020-10-14 05:06:02,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:02,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:02,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 05:06:02,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:06:02,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-14 05:06:02,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:06:04,501 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-14 05:06:04,667 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 53 [2020-10-14 05:06:04,998 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 76 [2020-10-14 05:06:05,250 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 68 [2020-10-14 05:06:05,718 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 87 [2020-10-14 05:06:06,080 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 73 [2020-10-14 05:06:07,154 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 93 [2020-10-14 05:06:07,907 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 84 [2020-10-14 05:06:08,647 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 106 [2020-10-14 05:06:09,558 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 92 [2020-10-14 05:06:10,641 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 87 [2020-10-14 05:06:11,229 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 65 [2020-10-14 05:06:11,767 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 60 [2020-10-14 05:06:12,130 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 55 [2020-10-14 05:06:13,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:13,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:13,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:13,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:13,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:13,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:13,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:13,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:13,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:13,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:13,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:13,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 40 proven. 357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:06:13,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877894665] [2020-10-14 05:06:13,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:13,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 05:06:13,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843652018] [2020-10-14 05:06:13,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 05:06:13,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:13,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 05:06:13,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1156, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:06:13,196 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 36 states. [2020-10-14 05:06:14,557 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2020-10-14 05:06:14,805 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-14 05:06:15,104 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 99 [2020-10-14 05:06:15,431 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 95 [2020-10-14 05:06:15,833 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 127 [2020-10-14 05:06:16,203 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 115 [2020-10-14 05:06:16,759 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 153 [2020-10-14 05:06:17,209 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 134 [2020-10-14 05:06:18,011 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 182 [2020-10-14 05:06:18,683 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 163 [2020-10-14 05:06:19,867 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 362 DAG size of output: 212 [2020-10-14 05:06:20,644 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 192 [2020-10-14 05:06:22,059 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 396 DAG size of output: 233 [2020-10-14 05:06:22,745 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 194 [2020-10-14 05:06:23,324 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 170 [2020-10-14 05:06:23,774 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 172 [2020-10-14 05:06:24,150 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 145 [2020-10-14 05:06:24,520 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 147 [2020-10-14 05:06:24,837 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 125 [2020-10-14 05:06:25,138 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 127 [2020-10-14 05:06:25,380 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 101 [2020-10-14 05:06:25,630 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 103 [2020-10-14 05:06:25,819 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-14 05:06:26,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:26,898 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-10-14 05:06:26,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 05:06:26,899 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 85 [2020-10-14 05:06:26,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:26,900 INFO L225 Difference]: With dead ends: 94 [2020-10-14 05:06:26,900 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 05:06:26,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=1278, Invalid=4728, Unknown=0, NotChecked=0, Total=6006 [2020-10-14 05:06:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 05:06:26,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2020-10-14 05:06:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 05:06:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-14 05:06:26,912 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 85 [2020-10-14 05:06:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:26,912 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-14 05:06:26,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 05:06:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-14 05:06:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 05:06:26,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:26,913 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:26,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:06:26,914 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:26,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:26,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1495868262, now seen corresponding path program 21 times [2020-10-14 05:06:26,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:26,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282820317] [2020-10-14 05:06:26,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:27,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:32,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:32,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 05:06:32,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:32,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 05:06:32,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:32,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:32,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 05:06:32,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:32,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-14 05:06:32,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0