/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/simple_search_value-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:30:54,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:30:54,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:30:54,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:30:54,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:30:54,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:30:54,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:30:54,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:30:54,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:30:54,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:30:54,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:30:54,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:30:54,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:30:54,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:30:54,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:30:54,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:30:54,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:30:54,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:30:54,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:30:54,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:30:54,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:30:54,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:30:54,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:30:54,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:30:54,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:30:54,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:30:54,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:30:54,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:30:54,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:30:54,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:30:54,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:30:54,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:30:54,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:30:54,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:30:54,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:30:54,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:30:54,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:30:54,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:30:54,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:30:54,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:30:54,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:30:54,998 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 23:30:55,039 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:30:55,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:30:55,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:30:55,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:30:55,041 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:30:55,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:30:55,042 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:30:55,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:30:55,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:30:55,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:30:55,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:30:55,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:30:55,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:30:55,044 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:30:55,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:30:55,045 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:30:55,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:30:55,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:30:55,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:30:55,046 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:30:55,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:30:55,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:30:55,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:30:55,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:30:55,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:30:55,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:30:55,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:30:55,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:30:55,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:30:55,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:30:55,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:30:55,359 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:30:55,362 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:30:55,364 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:30:55,364 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:30:55,365 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_search_value-2.i [2020-10-14 23:30:55,445 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/606850c31/ae90c0c53d7b4587990b58467faa2a7e/FLAG3151d8327 [2020-10-14 23:30:56,003 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:30:56,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_search_value-2.i [2020-10-14 23:30:56,017 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/606850c31/ae90c0c53d7b4587990b58467faa2a7e/FLAG3151d8327 [2020-10-14 23:30:56,320 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/606850c31/ae90c0c53d7b4587990b58467faa2a7e [2020-10-14 23:30:56,331 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:30:56,333 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:30:56,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:30:56,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:30:56,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:30:56,342 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:30:56" (1/1) ... [2020-10-14 23:30:56,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fbc03b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:56, skipping insertion in model container [2020-10-14 23:30:56,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:30:56" (1/1) ... [2020-10-14 23:30:56,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:30:56,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:30:56,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:30:56,834 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:30:56,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:30:56,983 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:30:56,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:56 WrapperNode [2020-10-14 23:30:56,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:30:56,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:30:56,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:30:56,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:30:57,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:56" (1/1) ... [2020-10-14 23:30:57,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:56" (1/1) ... [2020-10-14 23:30:57,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:56" (1/1) ... [2020-10-14 23:30:57,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:56" (1/1) ... [2020-10-14 23:30:57,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:56" (1/1) ... [2020-10-14 23:30:57,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:56" (1/1) ... [2020-10-14 23:30:57,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:56" (1/1) ... [2020-10-14 23:30:57,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:30:57,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:30:57,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:30:57,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:30:57,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:56" (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 23:30:57,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:30:57,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:30:57,132 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 23:30:57,132 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 23:30:57,132 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-14 23:30:57,132 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:30:57,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:30:57,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:30:57,133 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 23:30:57,133 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 23:30:57,133 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 23:30:57,133 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 23:30:57,134 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 23:30:57,134 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 23:30:57,134 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 23:30:57,134 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 23:30:57,134 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 23:30:57,134 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 23:30:57,135 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 23:30:57,135 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 23:30:57,135 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 23:30:57,135 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 23:30:57,135 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 23:30:57,136 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 23:30:57,136 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 23:30:57,136 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 23:30:57,136 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 23:30:57,136 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 23:30:57,136 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 23:30:57,137 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 23:30:57,137 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 23:30:57,137 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 23:30:57,137 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 23:30:57,137 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 23:30:57,137 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 23:30:57,138 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 23:30:57,138 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 23:30:57,138 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 23:30:57,138 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 23:30:57,138 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 23:30:57,138 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 23:30:57,138 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 23:30:57,139 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 23:30:57,139 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 23:30:57,139 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 23:30:57,139 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 23:30:57,139 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 23:30:57,139 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 23:30:57,139 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 23:30:57,140 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 23:30:57,140 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 23:30:57,140 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 23:30:57,140 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 23:30:57,140 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 23:30:57,140 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 23:30:57,141 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 23:30:57,141 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 23:30:57,141 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 23:30:57,141 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 23:30:57,141 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 23:30:57,141 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 23:30:57,141 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 23:30:57,142 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 23:30:57,142 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 23:30:57,142 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-14 23:30:57,142 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 23:30:57,142 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 23:30:57,142 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 23:30:57,143 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 23:30:57,143 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 23:30:57,143 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 23:30:57,143 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 23:30:57,143 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 23:30:57,143 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 23:30:57,144 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 23:30:57,144 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 23:30:57,144 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 23:30:57,144 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 23:30:57,144 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 23:30:57,144 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 23:30:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 23:30:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 23:30:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 23:30:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 23:30:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 23:30:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 23:30:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 23:30:57,146 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 23:30:57,146 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 23:30:57,146 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 23:30:57,146 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 23:30:57,146 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 23:30:57,146 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 23:30:57,146 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 23:30:57,147 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 23:30:57,147 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 23:30:57,147 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 23:30:57,147 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 23:30:57,147 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 23:30:57,147 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 23:30:57,147 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 23:30:57,148 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 23:30:57,148 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 23:30:57,148 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 23:30:57,148 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 23:30:57,148 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 23:30:57,148 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 23:30:57,148 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 23:30:57,149 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 23:30:57,149 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 23:30:57,149 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 23:30:57,149 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 23:30:57,149 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 23:30:57,149 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-14 23:30:57,149 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:30:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 23:30:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 23:30:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 23:30:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 23:30:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 23:30:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:30:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:30:57,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 23:30:57,451 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-14 23:30:57,642 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:30:57,643 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 23:30:57,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:30:57 BoogieIcfgContainer [2020-10-14 23:30:57,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:30:57,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:30:57,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:30:57,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:30:57,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:30:56" (1/3) ... [2020-10-14 23:30:57,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@308dad48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:30:57, skipping insertion in model container [2020-10-14 23:30:57,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:30:56" (2/3) ... [2020-10-14 23:30:57,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@308dad48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:30:57, skipping insertion in model container [2020-10-14 23:30:57,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:30:57" (3/3) ... [2020-10-14 23:30:57,657 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_search_value-2.i [2020-10-14 23:30:57,667 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:30:57,675 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:30:57,689 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:30:57,715 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:30:57,715 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:30:57,716 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:30:57,716 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:30:57,716 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:30:57,717 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:30:57,717 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:30:57,717 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:30:57,736 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-14 23:30:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 23:30:57,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:57,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:57,745 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:57,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:57,751 INFO L82 PathProgramCache]: Analyzing trace with hash -2052998842, now seen corresponding path program 1 times [2020-10-14 23:30:57,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:57,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522116663] [2020-10-14 23:30:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:57,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:57,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:58,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:58,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:58,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 23:30:58,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:30:58,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-10-14 23:30:58,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:58,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:58,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:30:58,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:30:58,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:30:58,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:30:58,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:58,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:58,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:58,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:58,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:58,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 23:30:58,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:58,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:58,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:58,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:58,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:58,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:58,442 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 23:30:58,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522116663] [2020-10-14 23:30:58,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:30:58,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 23:30:58,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114683003] [2020-10-14 23:30:58,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:30:58,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:58,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:30:58,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:30:58,467 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2020-10-14 23:30:58,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:58,607 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2020-10-14 23:30:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:30:58,609 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-14 23:30:58,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:58,618 INFO L225 Difference]: With dead ends: 59 [2020-10-14 23:30:58,618 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 23:30:58,622 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 23:30:58,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 23:30:58,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2020-10-14 23:30:58,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 23:30:58,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-14 23:30:58,672 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2020-10-14 23:30:58,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:58,672 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-14 23:30:58,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:30:58,673 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-14 23:30:58,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:30:58,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:58,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:58,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:30:58,674 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:58,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:58,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1621988247, now seen corresponding path program 1 times [2020-10-14 23:30:58,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:58,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999586099] [2020-10-14 23:30:58,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:58,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:58,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:58,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:58,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:58,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:59,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:59,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:59,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:30:59,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:30:59,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 817 [2020-10-14 23:30:59,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:59,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:59,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:30:59,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:30:59,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:30:59,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:59,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:59,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:59,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:59,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:59,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:59,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:30:59,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:59,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:59,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:59,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:59,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:59,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:59,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999586099] [2020-10-14 23:30:59,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:30:59,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:30:59,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234020168] [2020-10-14 23:30:59,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:30:59,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:59,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:30:59,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:30:59,602 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-10-14 23:30:59,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:30:59,733 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-10-14 23:30:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:30:59,734 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 23:30:59,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:30:59,735 INFO L225 Difference]: With dead ends: 42 [2020-10-14 23:30:59,735 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 23:30:59,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:30:59,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 23:30:59,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-14 23:30:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:30:59,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-10-14 23:30:59,744 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2020-10-14 23:30:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:30:59,744 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-10-14 23:30:59,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:30:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-10-14 23:30:59,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:30:59,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:30:59,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:30:59,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:30:59,747 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:30:59,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:30:59,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1623835289, now seen corresponding path program 1 times [2020-10-14 23:30:59,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:30:59,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588625002] [2020-10-14 23:30:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:30:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:59,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:59,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:59,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:59,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:59,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:30:59,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:30:59,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-14 23:30:59,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:59,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:59,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:30:59,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:30:59,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:30:59,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:59,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:30:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:30:59,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:30:59,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:30:59,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:30:59,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:30:59,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:30:59,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:30:59,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:30:59,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:30:59,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:30:59,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:30:59,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:30:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:30:59,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588625002] [2020-10-14 23:30:59,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:30:59,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:30:59,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746233417] [2020-10-14 23:30:59,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:30:59,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:30:59,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:30:59,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:30:59,983 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 6 states. [2020-10-14 23:31:00,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:00,113 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-10-14 23:31:00,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:31:00,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 23:31:00,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:00,114 INFO L225 Difference]: With dead ends: 44 [2020-10-14 23:31:00,115 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 23:31:00,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:31:00,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 23:31:00,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-14 23:31:00,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:31:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-14 23:31:00,122 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2020-10-14 23:31:00,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:00,123 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-14 23:31:00,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:31:00,124 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-14 23:31:00,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:31:00,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:00,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:00,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:31:00,125 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:00,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:00,126 INFO L82 PathProgramCache]: Analyzing trace with hash -896124645, now seen corresponding path program 1 times [2020-10-14 23:31:00,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:00,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012057369] [2020-10-14 23:31:00,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:00,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:00,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:00,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:00,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:31:00,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:31:00,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-14 23:31:00,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:00,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:31:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:31:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 23:31:00,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:31:00,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:00,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:00,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:00,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:00,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:00,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:31:00,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:00,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:00,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:00,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:00,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:00,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 28 [2020-10-14 23:31:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:31:00,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012057369] [2020-10-14 23:31:00,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:31:00,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 23:31:00,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199303376] [2020-10-14 23:31:00,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:31:00,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:00,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:31:00,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:31:00,282 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 5 states. [2020-10-14 23:31:00,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:00,366 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2020-10-14 23:31:00,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:31:00,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-14 23:31:00,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:00,367 INFO L225 Difference]: With dead ends: 50 [2020-10-14 23:31:00,368 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 23:31:00,368 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 23:31:00,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 23:31:00,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-14 23:31:00,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 23:31:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-14 23:31:00,373 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-10-14 23:31:00,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:00,374 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-14 23:31:00,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:31:00,374 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-14 23:31:00,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:31:00,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:00,375 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:00,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:31:00,375 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:00,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:00,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1130545059, now seen corresponding path program 1 times [2020-10-14 23:31:00,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:00,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878342713] [2020-10-14 23:31:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:00,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:00,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:00,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:00,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:00,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:00,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:01,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:01,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:02,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:02,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:31:02,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:31:02,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1728 [2020-10-14 23:31:02,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:02,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:02,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:31:02,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:31:02,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:31:02,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:31:02,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:02,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:02,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:02,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:02,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:02,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:02,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:02,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:02,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:02,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:02,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:02,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:31:02,228 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 23:31:02,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878342713] [2020-10-14 23:31:02,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:02,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:31:02,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189090309] [2020-10-14 23:31:02,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:31:02,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:02,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:31:02,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:31:02,231 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 9 states. [2020-10-14 23:31:02,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:02,429 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2020-10-14 23:31:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:31:02,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-14 23:31:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:02,432 INFO L225 Difference]: With dead ends: 49 [2020-10-14 23:31:02,432 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 23:31:02,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:31:02,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 23:31:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-10-14 23:31:02,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 23:31:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-14 23:31:02,441 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2020-10-14 23:31:02,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:02,441 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-14 23:31:02,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:31:02,441 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-14 23:31:02,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:31:02,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:02,443 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:02,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:31:02,444 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:02,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:02,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1128698017, now seen corresponding path program 1 times [2020-10-14 23:31:02,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:02,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393216487] [2020-10-14 23:31:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:02,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:02,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:02,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:03,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:03,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:03,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:31:03,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:31:03,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 690 [2020-10-14 23:31:03,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:03,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:03,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:31:03,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:31:03,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:31:03,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:31:03,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:03,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:03,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:03,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:03,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:03,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:31:03,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:03,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:03,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:03,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:03,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:03,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:31:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:03,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393216487] [2020-10-14 23:31:03,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:03,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:31:03,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385524911] [2020-10-14 23:31:03,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:31:03,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:03,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:31:03,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:31:03,352 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 9 states. [2020-10-14 23:31:03,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:03,627 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-10-14 23:31:03,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:31:03,628 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-14 23:31:03,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:03,629 INFO L225 Difference]: With dead ends: 53 [2020-10-14 23:31:03,629 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 23:31:03,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:31:03,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 23:31:03,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2020-10-14 23:31:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 23:31:03,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-14 23:31:03,636 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 25 [2020-10-14 23:31:03,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:03,636 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-14 23:31:03,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:31:03,636 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-14 23:31:03,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:31:03,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:03,638 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:03,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:31:03,638 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:03,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:03,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1907039335, now seen corresponding path program 2 times [2020-10-14 23:31:03,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:03,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519307419] [2020-10-14 23:31:03,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:03,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:03,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:03,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:03,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:04,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:04,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:04,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:05,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:05,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:31:05,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:31:05,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2178 [2020-10-14 23:31:05,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:05,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:05,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:31:05,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:31:05,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:31:05,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:31:06,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:06,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:06,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:06,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:06,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:06,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:31:06,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:06,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:06,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:06,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:06,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:06,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:06,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519307419] [2020-10-14 23:31:06,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:06,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:31:06,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554875654] [2020-10-14 23:31:06,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:31:06,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:06,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:31:06,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:31:06,103 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 11 states. [2020-10-14 23:31:06,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:06,376 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2020-10-14 23:31:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:31:06,376 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-14 23:31:06,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:06,377 INFO L225 Difference]: With dead ends: 54 [2020-10-14 23:31:06,377 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 23:31:06,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:31:06,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 23:31:06,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2020-10-14 23:31:06,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 23:31:06,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2020-10-14 23:31:06,384 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 30 [2020-10-14 23:31:06,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:06,385 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2020-10-14 23:31:06,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:31:06,385 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2020-10-14 23:31:06,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:31:06,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:06,386 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:06,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:31:06,386 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:06,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:06,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1854561521, now seen corresponding path program 1 times [2020-10-14 23:31:06,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:06,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787159559] [2020-10-14 23:31:06,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:06,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:06,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:06,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:06,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:06,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:06,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:07,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:07,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:08,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:08,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:31:08,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:31:08,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2456 [2020-10-14 23:31:08,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:08,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:08,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:31:08,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:31:08,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:31:08,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:31:09,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:09,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:09,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:09,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:09,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:09,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:09,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:09,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:09,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:09,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:09,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:09,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:31:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:09,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787159559] [2020-10-14 23:31:09,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:09,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:31:09,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314848627] [2020-10-14 23:31:09,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:31:09,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:09,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:31:09,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:31:09,054 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 10 states. [2020-10-14 23:31:09,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:09,368 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2020-10-14 23:31:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:31:09,368 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-14 23:31:09,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:09,369 INFO L225 Difference]: With dead ends: 59 [2020-10-14 23:31:09,370 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 23:31:09,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:31:09,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 23:31:09,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-10-14 23:31:09,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:31:09,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-10-14 23:31:09,376 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 30 [2020-10-14 23:31:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:09,377 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-10-14 23:31:09,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:31:09,377 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-10-14 23:31:09,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:31:09,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:09,378 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:09,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:31:09,379 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:09,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:09,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1852714479, now seen corresponding path program 2 times [2020-10-14 23:31:09,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:09,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838389797] [2020-10-14 23:31:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:09,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:09,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:09,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:09,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:10,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:10,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:31:10,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:31:10,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 717 [2020-10-14 23:31:10,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:10,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:10,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:31:10,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:31:10,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:31:10,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:31:10,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:10,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:10,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:10,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:10,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:10,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:10,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:10,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:10,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:10,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:10,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:10,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:10,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:31:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:10,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838389797] [2020-10-14 23:31:10,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:10,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:31:10,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032571299] [2020-10-14 23:31:10,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:31:10,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:10,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:31:10,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:31:10,281 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 10 states. [2020-10-14 23:31:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:10,603 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-10-14 23:31:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:31:10,603 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-14 23:31:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:10,604 INFO L225 Difference]: With dead ends: 61 [2020-10-14 23:31:10,604 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 23:31:10,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:31:10,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 23:31:10,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-10-14 23:31:10,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:31:10,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-14 23:31:10,614 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 30 [2020-10-14 23:31:10,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:10,614 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-14 23:31:10,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:31:10,614 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-14 23:31:10,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:31:10,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:10,616 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:10,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:31:10,617 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:10,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:10,618 INFO L82 PathProgramCache]: Analyzing trace with hash -77707117, now seen corresponding path program 1 times [2020-10-14 23:31:10,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:10,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510782678] [2020-10-14 23:31:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:10,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:10,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:10,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:10,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:31:10,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:31:10,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-14 23:31:10,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:10,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:10,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:31:10,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:31:10,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:31:10,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:10,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:10,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:10,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:10,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:10,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:10,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:10,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:10,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:10,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:10,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:10,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:10,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:31:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:31:10,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510782678] [2020-10-14 23:31:10,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:10,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:31:10,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644688746] [2020-10-14 23:31:10,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:31:10,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:10,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:31:10,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:31:10,921 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 9 states. [2020-10-14 23:31:11,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:11,067 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-10-14 23:31:11,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:31:11,067 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-14 23:31:11,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:11,068 INFO L225 Difference]: With dead ends: 65 [2020-10-14 23:31:11,068 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 23:31:11,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:31:11,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 23:31:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-14 23:31:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:31:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-14 23:31:11,078 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 30 [2020-10-14 23:31:11,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:11,079 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-14 23:31:11,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:31:11,081 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-14 23:31:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:31:11,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:11,082 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:11,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:31:11,085 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:11,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:11,085 INFO L82 PathProgramCache]: Analyzing trace with hash 180458321, now seen corresponding path program 1 times [2020-10-14 23:31:11,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:11,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923396586] [2020-10-14 23:31:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:11,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:11,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:11,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:31:11,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:11,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-14 23:31:11,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:11,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:11,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:31:11,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:31:11,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:31:11,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:11,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:11,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:11,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:11,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:11,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:11,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:11,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:11,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:11,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:11,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:11,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:11,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:31:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 23:31:11,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923396586] [2020-10-14 23:31:11,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:11,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:31:11,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230402718] [2020-10-14 23:31:11,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:31:11,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:11,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:31:11,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:31:11,181 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 6 states. [2020-10-14 23:31:11,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:11,272 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2020-10-14 23:31:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:31:11,272 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-14 23:31:11,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:11,273 INFO L225 Difference]: With dead ends: 71 [2020-10-14 23:31:11,273 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 23:31:11,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:31:11,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 23:31:11,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-14 23:31:11,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 23:31:11,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-14 23:31:11,284 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 30 [2020-10-14 23:31:11,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:11,285 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-14 23:31:11,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:31:11,285 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-14 23:31:11,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 23:31:11,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:11,288 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:11,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:31:11,288 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:11,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:11,289 INFO L82 PathProgramCache]: Analyzing trace with hash -572800235, now seen corresponding path program 3 times [2020-10-14 23:31:11,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:11,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440602732] [2020-10-14 23:31:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:11,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:11,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:11,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:11,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:11,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:11,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:12,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:12,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:13,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:14,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:14,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:15,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:15,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:15,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:15,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:16,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:16,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:31:16,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 23:31:16,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 23:31:16,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:16,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:16,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:31:16,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:31:16,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:31:16,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:31:16,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:16,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:16,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:16,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:16,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:16,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:16,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:16,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:16,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:16,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:16,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:16,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:31:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:16,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440602732] [2020-10-14 23:31:16,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:16,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:31:16,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472048225] [2020-10-14 23:31:16,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:31:16,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:16,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:31:16,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:31:16,578 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 12 states. [2020-10-14 23:31:16,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:16,879 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2020-10-14 23:31:16,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:31:16,880 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-14 23:31:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:16,881 INFO L225 Difference]: With dead ends: 64 [2020-10-14 23:31:16,881 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 23:31:16,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:31:16,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 23:31:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-10-14 23:31:16,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 23:31:16,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2020-10-14 23:31:16,888 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 35 [2020-10-14 23:31:16,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:16,889 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2020-10-14 23:31:16,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:31:16,889 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2020-10-14 23:31:16,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 23:31:16,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:16,890 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:16,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:31:16,891 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:16,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:16,891 INFO L82 PathProgramCache]: Analyzing trace with hash -570953193, now seen corresponding path program 2 times [2020-10-14 23:31:16,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:16,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361123943] [2020-10-14 23:31:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:16,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:16,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:16,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:17,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:17,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:17,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:18,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:18,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:18,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:18,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:19,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:20,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:20,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:31:20,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 23:31:20,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3460 [2020-10-14 23:31:20,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:20,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:20,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:31:20,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:31:20,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:31:20,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:31:20,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:20,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:20,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:20,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:20,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:20,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:20,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:20,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:20,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:20,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:20,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:20,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:20,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361123943] [2020-10-14 23:31:20,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:20,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:31:20,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772630546] [2020-10-14 23:31:20,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:31:20,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:20,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:31:20,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:31:20,755 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 12 states. [2020-10-14 23:31:21,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:21,327 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2020-10-14 23:31:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:31:21,328 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-14 23:31:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:21,329 INFO L225 Difference]: With dead ends: 66 [2020-10-14 23:31:21,329 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 23:31:21,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:31:21,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 23:31:21,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-10-14 23:31:21,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 23:31:21,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-10-14 23:31:21,335 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 35 [2020-10-14 23:31:21,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:21,336 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-10-14 23:31:21,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:31:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-10-14 23:31:21,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 23:31:21,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:21,337 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:21,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:31:21,337 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:21,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:21,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1204054169, now seen corresponding path program 1 times [2020-10-14 23:31:21,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:21,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946554102] [2020-10-14 23:31:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:21,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:21,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:21,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:21,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:21,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:21,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:22,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:22,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:22,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:22,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:31:22,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:31:22,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1452 [2020-10-14 23:31:22,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:22,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:22,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:31:22,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:31:22,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 23:31:22,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:23,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:23,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:23,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:23,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:23,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:23,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:23,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:23,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:23,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:23,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:23,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:23,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:23,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946554102] [2020-10-14 23:31:23,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:23,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:31:23,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468579258] [2020-10-14 23:31:23,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:31:23,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:23,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:31:23,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:31:23,076 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 12 states. [2020-10-14 23:31:23,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:23,437 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-10-14 23:31:23,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:31:23,438 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-14 23:31:23,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:23,439 INFO L225 Difference]: With dead ends: 64 [2020-10-14 23:31:23,439 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 23:31:23,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:31:23,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 23:31:23,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2020-10-14 23:31:23,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 23:31:23,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-10-14 23:31:23,446 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 35 [2020-10-14 23:31:23,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:23,446 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-10-14 23:31:23,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:31:23,447 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-10-14 23:31:23,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:31:23,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:23,447 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:23,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:31:23,447 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:23,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:23,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1170371759, now seen corresponding path program 4 times [2020-10-14 23:31:23,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:23,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349050225] [2020-10-14 23:31:23,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:23,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:23,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:23,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:23,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:23,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:23,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:24,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:25,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:25,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:25,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:26,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:27,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:27,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:27,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:28,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:28,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:31:28,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 23:31:28,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 23:31:28,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:28,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:28,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:31:28,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:31:28,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 23:31:28,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:31:28,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:28,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:28,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:28,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:28,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:28,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:31:28,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:28,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:28,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:28,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:28,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:28,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:28,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349050225] [2020-10-14 23:31:28,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:28,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:31:28,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416800366] [2020-10-14 23:31:28,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:31:28,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:28,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:31:28,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:31:28,917 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 14 states. [2020-10-14 23:31:29,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:29,450 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2020-10-14 23:31:29,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:31:29,452 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-14 23:31:29,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:29,453 INFO L225 Difference]: With dead ends: 69 [2020-10-14 23:31:29,453 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 23:31:29,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:31:29,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 23:31:29,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2020-10-14 23:31:29,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 23:31:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2020-10-14 23:31:29,459 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 40 [2020-10-14 23:31:29,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:29,459 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2020-10-14 23:31:29,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:31:29,460 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2020-10-14 23:31:29,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:31:29,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:29,460 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:29,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:31:29,461 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:29,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:29,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1504223723, now seen corresponding path program 2 times [2020-10-14 23:31:29,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:29,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361937081] [2020-10-14 23:31:29,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:29,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:29,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:29,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:29,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:30,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:30,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:30,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:30,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:31,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:33,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:33,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:31:33,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 23:31:33,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3766 [2020-10-14 23:31:33,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:33,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:33,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:31:33,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:31:33,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 23:31:33,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:33,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:33,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:33,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:33,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:33,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:33,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:33,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:33,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:33,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:33,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:33,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:33,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:31:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:33,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361937081] [2020-10-14 23:31:33,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:33,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:31:33,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834455514] [2020-10-14 23:31:33,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:31:33,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:33,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:31:33,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:31:33,544 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand 13 states. [2020-10-14 23:31:34,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:34,092 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2020-10-14 23:31:34,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:31:34,093 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-14 23:31:34,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:34,094 INFO L225 Difference]: With dead ends: 74 [2020-10-14 23:31:34,094 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 23:31:34,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:31:34,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 23:31:34,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-10-14 23:31:34,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 23:31:34,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-10-14 23:31:34,101 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 40 [2020-10-14 23:31:34,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:34,101 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-10-14 23:31:34,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:31:34,101 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-10-14 23:31:34,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:31:34,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:34,102 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:34,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:31:34,102 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:34,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:34,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1502376681, now seen corresponding path program 3 times [2020-10-14 23:31:34,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:34,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988861314] [2020-10-14 23:31:34,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:34,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:34,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:34,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:34,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:34,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:34,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:34,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:31:34,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:31:34,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 812 [2020-10-14 23:31:34,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:34,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:34,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:31:34,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:31:34,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:31:34,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:35,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:35,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:35,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:35,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:35,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:35,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:35,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:35,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:35,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:35,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:35,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:35,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:35,108 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-14 23:31:35,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988861314] [2020-10-14 23:31:35,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:35,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:31:35,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142761187] [2020-10-14 23:31:35,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:31:35,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:35,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:31:35,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:31:35,110 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 11 states. [2020-10-14 23:31:35,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:35,302 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2020-10-14 23:31:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:31:35,302 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-14 23:31:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:35,303 INFO L225 Difference]: With dead ends: 91 [2020-10-14 23:31:35,304 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 23:31:35,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:31:35,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 23:31:35,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-14 23:31:35,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 23:31:35,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2020-10-14 23:31:35,310 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 40 [2020-10-14 23:31:35,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:35,311 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2020-10-14 23:31:35,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:31:35,311 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2020-10-14 23:31:35,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:31:35,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:35,312 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:35,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:31:35,312 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:35,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:35,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1204242713, now seen corresponding path program 4 times [2020-10-14 23:31:35,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:35,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760193211] [2020-10-14 23:31:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:35,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:35,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:35,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:35,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:35,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:31:35,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:31:35,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-14 23:31:35,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:35,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:35,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:31:35,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:31:35,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:31:35,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:35,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:35,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:35,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:35,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:35,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:35,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:35,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:35,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:35,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:35,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:35,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:35,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 23:31:35,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760193211] [2020-10-14 23:31:35,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:35,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:31:35,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745419997] [2020-10-14 23:31:35,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:31:35,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:35,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:31:35,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:31:35,855 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand 11 states. [2020-10-14 23:31:36,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:36,124 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2020-10-14 23:31:36,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:31:36,125 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-14 23:31:36,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:36,126 INFO L225 Difference]: With dead ends: 83 [2020-10-14 23:31:36,126 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 23:31:36,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:31:36,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 23:31:36,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-14 23:31:36,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 23:31:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-10-14 23:31:36,133 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 40 [2020-10-14 23:31:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:36,133 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-10-14 23:31:36,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:31:36,133 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-10-14 23:31:36,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:31:36,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:36,134 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:36,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:31:36,134 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:36,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:36,135 INFO L82 PathProgramCache]: Analyzing trace with hash -75620965, now seen corresponding path program 2 times [2020-10-14 23:31:36,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:36,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380277073] [2020-10-14 23:31:36,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:36,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:36,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:36,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:31:36,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:36,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-14 23:31:36,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:36,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:36,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:31:36,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:31:36,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:31:36,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:36,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:36,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:36,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:36,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:36,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:36,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:36,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:36,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:36,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:36,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:36,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:36,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-14 23:31:36,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380277073] [2020-10-14 23:31:36,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:36,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:31:36,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647533414] [2020-10-14 23:31:36,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:31:36,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:36,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:31:36,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:31:36,263 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 7 states. [2020-10-14 23:31:36,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:36,366 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2020-10-14 23:31:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:31:36,366 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-10-14 23:31:36,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:36,367 INFO L225 Difference]: With dead ends: 91 [2020-10-14 23:31:36,367 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 23:31:36,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:31:36,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 23:31:36,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-10-14 23:31:36,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 23:31:36,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-14 23:31:36,373 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 40 [2020-10-14 23:31:36,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:36,374 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-14 23:31:36,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:31:36,374 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-14 23:31:36,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 23:31:36,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:36,374 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:36,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:31:36,375 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:36,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:36,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1215108513, now seen corresponding path program 1 times [2020-10-14 23:31:36,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:36,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000580027] [2020-10-14 23:31:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:36,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:36,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:36,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:36,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:36,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:37,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:37,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:38,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:38,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:38,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:38,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:39,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:40,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:41,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:41,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 23:31:41,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 23:31:41,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 23:31:41,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:41,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:41,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:31:41,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:31:41,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 23:31:41,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:41,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:41,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:41,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:41,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:41,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:41,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:41,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:41,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:41,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:41,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:41,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:41,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:31:41,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000580027] [2020-10-14 23:31:41,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:41,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:31:41,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974662533] [2020-10-14 23:31:41,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:31:41,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:41,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:31:41,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:31:41,737 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 14 states. [2020-10-14 23:31:42,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:42,180 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-10-14 23:31:42,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:31:42,181 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-14 23:31:42,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:42,181 INFO L225 Difference]: With dead ends: 76 [2020-10-14 23:31:42,181 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 23:31:42,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:31:42,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 23:31:42,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-10-14 23:31:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 23:31:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2020-10-14 23:31:42,187 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 45 [2020-10-14 23:31:42,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:42,188 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2020-10-14 23:31:42,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:31:42,188 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2020-10-14 23:31:42,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 23:31:42,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:42,188 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:42,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:31:42,189 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:42,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:42,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1608135523, now seen corresponding path program 5 times [2020-10-14 23:31:42,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:42,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134133187] [2020-10-14 23:31:42,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:42,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:42,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:42,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:42,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:42,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:43,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:43,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:43,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:44,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:45,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:47,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:47,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 23:31:47,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 23:31:47,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 23:31:47,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:47,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:47,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:31:47,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:31:47,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:31:47,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:47,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:47,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:47,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:47,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:47,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:47,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:47,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:47,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:47,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:47,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134133187] [2020-10-14 23:31:47,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:47,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:31:47,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438800918] [2020-10-14 23:31:47,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:31:47,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:47,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:31:47,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:31:47,771 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand 15 states. [2020-10-14 23:31:48,128 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-14 23:31:48,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:48,444 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2020-10-14 23:31:48,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:31:48,445 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-14 23:31:48,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:48,446 INFO L225 Difference]: With dead ends: 79 [2020-10-14 23:31:48,446 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 23:31:48,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:31:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 23:31:48,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-10-14 23:31:48,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 23:31:48,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-10-14 23:31:48,453 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 45 [2020-10-14 23:31:48,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:48,453 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-10-14 23:31:48,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:31:48,453 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-10-14 23:31:48,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 23:31:48,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:48,454 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:48,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:31:48,455 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:48,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:48,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1606288481, now seen corresponding path program 6 times [2020-10-14 23:31:48,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:48,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551198274] [2020-10-14 23:31:48,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:48,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:48,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:48,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:48,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:49,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:49,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:50,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:51,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:51,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 23:31:51,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:31:51,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3216 [2020-10-14 23:31:51,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:51,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:51,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:31:51,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:31:51,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:31:51,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:52,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:52,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:52,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:52,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:52,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:52,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:31:52,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:52,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:52,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:31:52,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551198274] [2020-10-14 23:31:52,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:52,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:31:52,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151006915] [2020-10-14 23:31:52,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:31:52,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:52,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:31:52,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:31:52,174 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 15 states. [2020-10-14 23:31:52,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:52,960 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2020-10-14 23:31:52,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:31:52,963 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-14 23:31:52,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:52,964 INFO L225 Difference]: With dead ends: 79 [2020-10-14 23:31:52,964 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 23:31:52,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:31:52,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 23:31:52,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2020-10-14 23:31:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 23:31:52,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-10-14 23:31:52,971 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 45 [2020-10-14 23:31:52,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:52,971 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-10-14 23:31:52,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:31:52,971 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-10-14 23:31:52,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:31:52,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:52,972 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:52,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:31:52,972 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:52,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:52,973 INFO L82 PathProgramCache]: Analyzing trace with hash -537618533, now seen corresponding path program 2 times [2020-10-14 23:31:52,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:52,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116875263] [2020-10-14 23:31:52,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:52,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:53,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:53,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:53,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:53,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:53,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:54,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:55,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:55,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:55,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:55,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:56,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:57,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:57,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:31:57,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 23:31:57,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 23:31:57,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:57,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:57,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:31:57,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:31:57,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:31:57,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:31:58,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:31:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:58,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:58,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:31:58,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:31:58,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:31:58,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:31:58,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:31:58,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:31:58,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:31:58,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:31:58,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:31:58,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:31:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:31:58,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116875263] [2020-10-14 23:31:58,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:31:58,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:31:58,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619717073] [2020-10-14 23:31:58,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:31:58,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:31:58,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:31:58,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:31:58,616 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 16 states. [2020-10-14 23:31:59,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:31:59,091 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-10-14 23:31:59,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:31:59,092 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-14 23:31:59,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:31:59,093 INFO L225 Difference]: With dead ends: 78 [2020-10-14 23:31:59,093 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 23:31:59,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:31:59,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 23:31:59,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2020-10-14 23:31:59,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 23:31:59,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-10-14 23:31:59,099 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 50 [2020-10-14 23:31:59,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:31:59,099 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-10-14 23:31:59,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:31:59,099 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-10-14 23:31:59,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:31:59,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:31:59,100 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:31:59,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:31:59,100 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:31:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:31:59,101 INFO L82 PathProgramCache]: Analyzing trace with hash -930645543, now seen corresponding path program 7 times [2020-10-14 23:31:59,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:31:59,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326521364] [2020-10-14 23:31:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:31:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:31:59,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:59,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:59,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:59,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:31:59,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:01,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:01,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:01,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:02,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:04,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:04,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:32:04,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 23:32:04,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 23:32:04,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:04,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:04,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:32:04,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:04,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 23:32:04,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:04,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:04,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:04,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:04,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:04,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:04,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:04,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:04,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:04,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:04,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:04,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:04,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:04,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326521364] [2020-10-14 23:32:04,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:04,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:32:04,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484334418] [2020-10-14 23:32:04,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:32:04,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:04,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:32:04,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:32:04,659 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 17 states. [2020-10-14 23:32:05,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:05,561 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-10-14 23:32:05,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:32:05,562 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-10-14 23:32:05,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:05,562 INFO L225 Difference]: With dead ends: 81 [2020-10-14 23:32:05,562 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 23:32:05,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:32:05,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 23:32:05,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-14 23:32:05,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 23:32:05,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2020-10-14 23:32:05,570 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 50 [2020-10-14 23:32:05,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:05,570 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-10-14 23:32:05,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:32:05,571 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2020-10-14 23:32:05,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:32:05,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:05,571 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:05,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:32:05,575 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:05,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:05,575 INFO L82 PathProgramCache]: Analyzing trace with hash -928798501, now seen corresponding path program 8 times [2020-10-14 23:32:05,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:05,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795806649] [2020-10-14 23:32:05,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:05,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:05,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:05,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:05,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:06,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:07,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:07,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:10,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:10,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:32:10,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:32:10,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4419 [2020-10-14 23:32:10,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:10,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:10,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:32:10,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:10,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 23:32:10,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:10,393 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-14 23:32:10,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:10,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:10,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:10,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:10,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:10,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:32:10,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:10,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:10,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:10,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:10,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:10,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:10,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795806649] [2020-10-14 23:32:10,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:10,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:32:10,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504097792] [2020-10-14 23:32:10,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:32:10,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:10,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:32:10,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:32:10,744 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 17 states. [2020-10-14 23:32:11,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:11,680 INFO L93 Difference]: Finished difference Result 105 states and 124 transitions. [2020-10-14 23:32:11,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:32:11,681 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-10-14 23:32:11,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:11,682 INFO L225 Difference]: With dead ends: 105 [2020-10-14 23:32:11,682 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 23:32:11,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:32:11,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 23:32:11,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2020-10-14 23:32:11,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 23:32:11,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2020-10-14 23:32:11,690 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 50 [2020-10-14 23:32:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:11,690 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2020-10-14 23:32:11,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:32:11,690 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2020-10-14 23:32:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:32:11,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:11,691 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:11,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:32:11,692 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:11,692 INFO L82 PathProgramCache]: Analyzing trace with hash -157630769, now seen corresponding path program 9 times [2020-10-14 23:32:11,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:11,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343773254] [2020-10-14 23:32:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:11,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:11,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:11,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:11,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:11,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:13,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:13,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:13,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:14,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:16,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:16,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:16,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:32:16,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 23:32:16,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 23:32:16,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:16,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:16,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:32:16,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:16,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 23:32:16,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:17,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:17,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:17,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:17,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:17,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:17,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:17,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:17,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:17,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:17,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:17,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:17,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:17,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343773254] [2020-10-14 23:32:17,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:17,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:32:17,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376916464] [2020-10-14 23:32:17,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:32:17,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:17,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:32:17,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:32:17,329 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 16 states. [2020-10-14 23:32:18,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:18,285 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2020-10-14 23:32:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:32:18,285 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-14 23:32:18,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:18,286 INFO L225 Difference]: With dead ends: 107 [2020-10-14 23:32:18,286 INFO L226 Difference]: Without dead ends: 99 [2020-10-14 23:32:18,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:32:18,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-14 23:32:18,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2020-10-14 23:32:18,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-14 23:32:18,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2020-10-14 23:32:18,291 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 50 [2020-10-14 23:32:18,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:18,292 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2020-10-14 23:32:18,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:32:18,292 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2020-10-14 23:32:18,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:32:18,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:18,293 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:18,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:32:18,293 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:18,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:18,293 INFO L82 PathProgramCache]: Analyzing trace with hash -155783727, now seen corresponding path program 10 times [2020-10-14 23:32:18,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:18,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292071048] [2020-10-14 23:32:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:18,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:18,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:18,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:18,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:18,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:18,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:19,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:22,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:22,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:32:22,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:32:22,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4198 [2020-10-14 23:32:22,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:22,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:22,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:32:22,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:22,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 23:32:22,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:23,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:23,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:23,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:23,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:23,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:23,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:23,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:23,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:23,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:23,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:23,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:23,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:23,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292071048] [2020-10-14 23:32:23,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:23,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:32:23,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538638863] [2020-10-14 23:32:23,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:32:23,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:23,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:32:23,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:32:23,166 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand 16 states. [2020-10-14 23:32:24,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:24,114 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2020-10-14 23:32:24,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:32:24,115 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-14 23:32:24,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:24,116 INFO L225 Difference]: With dead ends: 109 [2020-10-14 23:32:24,117 INFO L226 Difference]: Without dead ends: 99 [2020-10-14 23:32:24,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:32:24,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-14 23:32:24,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2020-10-14 23:32:24,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-14 23:32:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2020-10-14 23:32:24,125 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 50 [2020-10-14 23:32:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:24,125 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2020-10-14 23:32:24,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:32:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2020-10-14 23:32:24,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:32:24,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:24,126 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:24,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:32:24,126 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:24,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:24,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1619223635, now seen corresponding path program 11 times [2020-10-14 23:32:24,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:24,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997055776] [2020-10-14 23:32:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:24,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:24,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:24,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:24,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:24,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:26,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:26,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:32:26,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:32:26,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1896 [2020-10-14 23:32:26,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:26,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:26,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:32:26,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:26,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:32:26,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:26,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:26,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:26,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:26,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:26,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:26,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:26,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:26,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:26,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:26,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:26,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:26,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-14 23:32:26,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997055776] [2020-10-14 23:32:26,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:26,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:32:26,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610770262] [2020-10-14 23:32:26,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:32:26,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:26,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:32:26,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:32:26,178 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand 13 states. [2020-10-14 23:32:26,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:26,385 INFO L93 Difference]: Finished difference Result 139 states and 164 transitions. [2020-10-14 23:32:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:32:26,386 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-14 23:32:26,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:26,387 INFO L225 Difference]: With dead ends: 139 [2020-10-14 23:32:26,387 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 23:32:26,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:32:26,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 23:32:26,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-14 23:32:26,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-14 23:32:26,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-10-14 23:32:26,394 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 50 [2020-10-14 23:32:26,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:26,395 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-10-14 23:32:26,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:32:26,395 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-10-14 23:32:26,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:32:26,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:26,396 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:26,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:32:26,396 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:26,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:26,397 INFO L82 PathProgramCache]: Analyzing trace with hash 801575185, now seen corresponding path program 3 times [2020-10-14 23:32:26,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:26,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847979605] [2020-10-14 23:32:26,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:26,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:26,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:26,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:26,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:32:26,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:26,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-14 23:32:26,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:26,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:26,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:32:26,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:26,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 23:32:26,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:27,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:27,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:27,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:27,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:27,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:27,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:27,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:27,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:27,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:27,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:27,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:27,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-14 23:32:27,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847979605] [2020-10-14 23:32:27,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:27,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:32:27,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946851217] [2020-10-14 23:32:27,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:32:27,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:27,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:32:27,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:32:27,232 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 14 states. [2020-10-14 23:32:27,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:27,791 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2020-10-14 23:32:27,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:32:27,791 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-14 23:32:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:27,792 INFO L225 Difference]: With dead ends: 116 [2020-10-14 23:32:27,792 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 23:32:27,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:32:27,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 23:32:27,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-14 23:32:27,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-14 23:32:27,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2020-10-14 23:32:27,801 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 50 [2020-10-14 23:32:27,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:27,801 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2020-10-14 23:32:27,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:32:27,801 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2020-10-14 23:32:27,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:32:27,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:27,802 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:27,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:32:27,802 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:27,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:27,802 INFO L82 PathProgramCache]: Analyzing trace with hash -786772717, now seen corresponding path program 4 times [2020-10-14 23:32:27,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:27,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879123570] [2020-10-14 23:32:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:27,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:27,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:27,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:32:27,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:27,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-14 23:32:27,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:27,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:27,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:32:27,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:32:27,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:32:27,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:27,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:27,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:27,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:27,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:27,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:27,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:32:27,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:27,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:27,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:27,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:27,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:27,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-14 23:32:27,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879123570] [2020-10-14 23:32:27,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:27,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:32:27,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012606402] [2020-10-14 23:32:27,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:32:27,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:27,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:32:27,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:32:27,936 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand 8 states. [2020-10-14 23:32:28,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:28,060 INFO L93 Difference]: Finished difference Result 147 states and 170 transitions. [2020-10-14 23:32:28,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:32:28,060 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-10-14 23:32:28,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:28,061 INFO L225 Difference]: With dead ends: 147 [2020-10-14 23:32:28,061 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 23:32:28,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:32:28,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 23:32:28,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-14 23:32:28,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 23:32:28,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-10-14 23:32:28,069 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 50 [2020-10-14 23:32:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:28,070 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-10-14 23:32:28,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:32:28,070 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-10-14 23:32:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 23:32:28,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:28,071 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:28,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:32:28,071 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:28,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:28,071 INFO L82 PathProgramCache]: Analyzing trace with hash 90158497, now seen corresponding path program 5 times [2020-10-14 23:32:28,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:28,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444090939] [2020-10-14 23:32:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:28,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:28,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:28,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:29,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:29,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 23:32:29,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:32:29,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1256 [2020-10-14 23:32:29,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:29,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:29,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:32:29,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:29,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 23:32:29,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:30,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:30,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:30,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:30,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:30,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:30,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:30,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:30,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:30,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:30,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:30,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:30,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 23:32:30,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444090939] [2020-10-14 23:32:30,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:30,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:32:30,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27212065] [2020-10-14 23:32:30,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:32:30,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:30,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:32:30,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:32:30,123 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 17 states. [2020-10-14 23:32:30,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:30,685 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2020-10-14 23:32:30,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:32:30,685 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 55 [2020-10-14 23:32:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:30,686 INFO L225 Difference]: With dead ends: 101 [2020-10-14 23:32:30,686 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 23:32:30,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:32:30,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 23:32:30,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-14 23:32:30,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 23:32:30,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-10-14 23:32:30,692 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 55 [2020-10-14 23:32:30,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:30,693 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-10-14 23:32:30,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:32:30,693 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-10-14 23:32:30,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 23:32:30,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:30,694 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:30,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:32:30,694 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:30,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:30,694 INFO L82 PathProgramCache]: Analyzing trace with hash 348323935, now seen corresponding path program 6 times [2020-10-14 23:32:30,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:30,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300574822] [2020-10-14 23:32:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:30,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:30,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:31,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:31,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 23:32:31,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:31,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 695 [2020-10-14 23:32:31,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:31,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:31,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:32:31,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:31,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 23:32:31,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:31,701 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-10-14 23:32:31,906 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-14 23:32:32,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:32,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:32,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:32,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:32,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:32,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:32:32,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:32,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:32,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:32,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:32,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:32,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 23:32:32,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300574822] [2020-10-14 23:32:32,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:32,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:32:32,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185215225] [2020-10-14 23:32:32,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:32:32,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:32,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:32:32,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:32:32,227 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 18 states. [2020-10-14 23:32:33,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:33,002 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2020-10-14 23:32:33,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:32:33,003 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-14 23:32:33,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:33,004 INFO L225 Difference]: With dead ends: 86 [2020-10-14 23:32:33,004 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 23:32:33,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:32:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 23:32:33,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2020-10-14 23:32:33,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 23:32:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-10-14 23:32:33,010 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 55 [2020-10-14 23:32:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:33,010 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-10-14 23:32:33,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:32:33,011 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-10-14 23:32:33,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 23:32:33,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:33,011 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:33,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:32:33,012 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:33,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:33,012 INFO L82 PathProgramCache]: Analyzing trace with hash -264806445, now seen corresponding path program 12 times [2020-10-14 23:32:33,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:33,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593905822] [2020-10-14 23:32:33,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:33,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:33,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:33,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:33,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:33,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:34,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:35,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:35,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 23:32:35,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:32:35,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2163 [2020-10-14 23:32:35,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:35,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:35,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:32:35,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:35,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 23:32:35,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:36,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:36,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:36,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:36,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:36,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:36,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:36,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:36,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:36,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:36,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:36,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:36,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:36,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593905822] [2020-10-14 23:32:36,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:36,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:32:36,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889490848] [2020-10-14 23:32:36,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:32:36,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:36,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:32:36,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:32:36,035 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 18 states. [2020-10-14 23:32:36,957 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2020-10-14 23:32:37,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:37,426 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2020-10-14 23:32:37,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:32:37,427 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-14 23:32:37,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:37,428 INFO L225 Difference]: With dead ends: 94 [2020-10-14 23:32:37,428 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 23:32:37,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:32:37,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 23:32:37,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2020-10-14 23:32:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 23:32:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-10-14 23:32:37,436 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 55 [2020-10-14 23:32:37,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:37,437 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-10-14 23:32:37,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:32:37,437 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-10-14 23:32:37,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 23:32:37,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:37,438 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:37,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:32:37,438 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:37,439 INFO L82 PathProgramCache]: Analyzing trace with hash -262959403, now seen corresponding path program 7 times [2020-10-14 23:32:37,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:37,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636985377] [2020-10-14 23:32:37,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:37,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:37,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:37,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:38,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:38,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 23:32:38,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:32:38,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 894 [2020-10-14 23:32:38,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:38,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:38,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:32:38,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:38,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 23:32:38,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:39,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:39,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:39,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:39,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:39,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:39,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:39,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:39,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:39,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:39,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:39,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:39,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:39,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636985377] [2020-10-14 23:32:39,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:39,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:32:39,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084108087] [2020-10-14 23:32:39,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:32:39,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:39,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:32:39,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:32:39,218 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 18 states. [2020-10-14 23:32:39,699 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-14 23:32:39,999 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-14 23:32:40,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:40,678 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2020-10-14 23:32:40,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:32:40,679 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-14 23:32:40,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:40,680 INFO L225 Difference]: With dead ends: 94 [2020-10-14 23:32:40,680 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 23:32:40,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:32:40,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 23:32:40,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2020-10-14 23:32:40,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 23:32:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2020-10-14 23:32:40,690 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 55 [2020-10-14 23:32:40,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:40,690 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2020-10-14 23:32:40,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:32:40,690 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2020-10-14 23:32:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 23:32:40,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:40,691 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:40,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:32:40,691 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:40,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:40,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1170125327, now seen corresponding path program 13 times [2020-10-14 23:32:40,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:40,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58769215] [2020-10-14 23:32:40,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:40,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:40,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:41,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:41,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:41,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:41,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:43,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:43,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:32:43,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:32:43,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2937 [2020-10-14 23:32:43,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:43,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:43,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:32:43,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:43,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 23:32:43,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:44,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:44,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:44,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:44,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:44,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:44,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:44,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:44,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:44,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:44,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:44,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:44,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:44,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58769215] [2020-10-14 23:32:44,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:44,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:32:44,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711026124] [2020-10-14 23:32:44,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:32:44,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:44,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:32:44,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:32:44,463 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand 20 states. [2020-10-14 23:32:45,336 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2020-10-14 23:32:45,627 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2020-10-14 23:32:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:46,033 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2020-10-14 23:32:46,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:32:46,033 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-10-14 23:32:46,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:46,034 INFO L225 Difference]: With dead ends: 99 [2020-10-14 23:32:46,034 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 23:32:46,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:32:46,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 23:32:46,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2020-10-14 23:32:46,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 23:32:46,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2020-10-14 23:32:46,044 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 60 [2020-10-14 23:32:46,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:46,044 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2020-10-14 23:32:46,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:32:46,045 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2020-10-14 23:32:46,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 23:32:46,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:46,045 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:46,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:32:46,046 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:46,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:46,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1035124057, now seen corresponding path program 14 times [2020-10-14 23:32:46,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:46,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472572278] [2020-10-14 23:32:46,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:46,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:46,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:46,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:47,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:47,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:47,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:50,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:50,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:32:50,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:32:50,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4441 [2020-10-14 23:32:50,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:50,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:50,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:32:50,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:50,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:32:50,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:51,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:51,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:51,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:51,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:51,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:51,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:51,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:51,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:51,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:51,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:51,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:51,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 30 proven. 63 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:32:51,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472572278] [2020-10-14 23:32:51,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:51,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:32:51,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127181987] [2020-10-14 23:32:51,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:32:51,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:51,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:32:51,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:32:51,403 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand 18 states. [2020-10-14 23:32:52,028 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-10-14 23:32:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:52,541 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2020-10-14 23:32:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:32:52,542 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 60 [2020-10-14 23:32:52,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:52,543 INFO L225 Difference]: With dead ends: 103 [2020-10-14 23:32:52,543 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 23:32:52,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:32:52,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 23:32:52,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2020-10-14 23:32:52,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 23:32:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2020-10-14 23:32:52,552 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 60 [2020-10-14 23:32:52,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:52,552 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2020-10-14 23:32:52,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:32:52,553 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2020-10-14 23:32:52,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 23:32:52,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:52,554 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:52,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 23:32:52,554 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:52,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:52,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1293289495, now seen corresponding path program 15 times [2020-10-14 23:32:52,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:52,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444475425] [2020-10-14 23:32:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:52,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:52,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:52,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:52,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:53,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:54,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:54,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:32:54,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:32:54,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1692 [2020-10-14 23:32:54,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:54,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:54,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:32:54,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:54,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 23:32:54,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:54,678 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-14 23:32:55,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:55,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:55,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:55,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:55,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:55,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:55,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:55,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:55,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:55,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:55,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:55,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 17 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:55,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444475425] [2020-10-14 23:32:55,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:55,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:32:55,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657774647] [2020-10-14 23:32:55,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:32:55,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:55,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:32:55,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:32:55,144 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 19 states. [2020-10-14 23:32:55,998 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-10-14 23:32:56,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:56,717 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2020-10-14 23:32:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:32:56,718 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 60 [2020-10-14 23:32:56,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:56,719 INFO L225 Difference]: With dead ends: 104 [2020-10-14 23:32:56,719 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 23:32:56,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:32:56,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 23:32:56,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-10-14 23:32:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-14 23:32:56,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2020-10-14 23:32:56,727 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 60 [2020-10-14 23:32:56,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:56,728 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2020-10-14 23:32:56,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:32:56,728 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2020-10-14 23:32:56,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 23:32:56,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:56,729 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:56,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 23:32:56,729 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:56,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:56,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1226670439, now seen corresponding path program 16 times [2020-10-14 23:32:56,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:56,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171674918] [2020-10-14 23:32:56,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:56,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:56,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:56,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:57,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:57,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:32:57,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:32:57,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 859 [2020-10-14 23:32:57,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:57,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:57,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:32:57,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:57,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 23:32:57,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:58,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:58,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:58,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:58,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:58,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:58,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:32:58,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:58,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:58,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:58,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:58,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:58,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:58,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171674918] [2020-10-14 23:32:58,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:58,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:32:58,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470634009] [2020-10-14 23:32:58,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:32:58,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:58,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:32:58,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:32:58,564 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand 19 states. [2020-10-14 23:32:59,392 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-10-14 23:33:00,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:00,052 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2020-10-14 23:33:00,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:33:00,053 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 60 [2020-10-14 23:33:00,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:00,055 INFO L225 Difference]: With dead ends: 104 [2020-10-14 23:33:00,055 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 23:33:00,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:33:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 23:33:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-10-14 23:33:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-14 23:33:00,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2020-10-14 23:33:00,063 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 60 [2020-10-14 23:33:00,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:00,064 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2020-10-14 23:33:00,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:33:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2020-10-14 23:33:00,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 23:33:00,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:00,065 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:00,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 23:33:00,065 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:00,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:00,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1224823397, now seen corresponding path program 8 times [2020-10-14 23:33:00,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:00,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017521049] [2020-10-14 23:33:00,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:00,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:00,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:00,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:33:00,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:00,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-14 23:33:00,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:00,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:00,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:33:00,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:33:00,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:33:00,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:00,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:00,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:00,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:00,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:00,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:00,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:00,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:00,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:00,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:00,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:00,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:00,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-14 23:33:00,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017521049] [2020-10-14 23:33:00,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:00,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:33:00,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760552086] [2020-10-14 23:33:00,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:33:00,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:00,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:33:00,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:33:00,272 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand 9 states. [2020-10-14 23:33:00,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:00,416 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2020-10-14 23:33:00,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:33:00,417 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-14 23:33:00,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:00,418 INFO L225 Difference]: With dead ends: 131 [2020-10-14 23:33:00,418 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 23:33:00,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:33:00,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 23:33:00,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-10-14 23:33:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 23:33:00,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-10-14 23:33:00,425 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 60 [2020-10-14 23:33:00,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:00,425 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-10-14 23:33:00,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:33:00,426 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-10-14 23:33:00,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 23:33:00,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:00,426 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:00,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 23:33:00,427 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:00,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:00,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1346466209, now seen corresponding path program 17 times [2020-10-14 23:33:00,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:00,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493295943] [2020-10-14 23:33:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:00,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:00,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:00,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:01,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:02,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:02,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:02,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:02,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:03,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:05,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:05,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 23:33:05,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 23:33:05,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 23:33:05,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:05,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:05,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:33:05,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:33:05,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 23:33:05,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:33:06,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:06,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:06,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:06,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:06,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:06,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:06,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:06,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:06,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:06,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:06,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:06,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 30 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:33:06,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493295943] [2020-10-14 23:33:06,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:06,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:33:06,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105690249] [2020-10-14 23:33:06,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:33:06,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:06,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:33:06,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:33:06,833 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 20 states. [2020-10-14 23:33:07,383 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-14 23:33:07,695 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-14 23:33:07,978 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2020-10-14 23:33:08,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:08,577 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2020-10-14 23:33:08,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:33:08,578 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 65 [2020-10-14 23:33:08,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:08,579 INFO L225 Difference]: With dead ends: 108 [2020-10-14 23:33:08,579 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 23:33:08,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:33:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 23:33:08,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-10-14 23:33:08,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-14 23:33:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2020-10-14 23:33:08,587 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 65 [2020-10-14 23:33:08,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:08,587 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2020-10-14 23:33:08,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:33:08,587 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2020-10-14 23:33:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 23:33:08,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:08,588 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:08,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 23:33:08,588 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:08,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:08,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1088300771, now seen corresponding path program 18 times [2020-10-14 23:33:08,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:08,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281285661] [2020-10-14 23:33:08,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:08,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:08,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:09,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:09,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:09,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:10,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:10,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:13,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:13,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 23:33:13,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:33:13,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 23:33:13,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:13,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:13,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:33:13,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:33:13,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 23:33:13,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:14,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:14,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:14,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:14,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:14,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:14,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:14,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:14,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:14,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:14,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:14,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:14,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:14,484 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 26 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:33:14,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281285661] [2020-10-14 23:33:14,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:14,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:33:14,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109307159] [2020-10-14 23:33:14,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:33:14,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:14,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:33:14,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:33:14,485 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand 20 states. [2020-10-14 23:33:15,425 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2020-10-14 23:33:15,608 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2020-10-14 23:33:16,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:16,089 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2020-10-14 23:33:16,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:33:16,090 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 65 [2020-10-14 23:33:16,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:16,091 INFO L225 Difference]: With dead ends: 100 [2020-10-14 23:33:16,091 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 23:33:16,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:33:16,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 23:33:16,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-14 23:33:16,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-14 23:33:16,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2020-10-14 23:33:16,099 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 65 [2020-10-14 23:33:16,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:16,099 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2020-10-14 23:33:16,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:33:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2020-10-14 23:33:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 23:33:16,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:16,100 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:16,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 23:33:16,100 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:16,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:16,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1481327781, now seen corresponding path program 19 times [2020-10-14 23:33:16,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:16,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219063763] [2020-10-14 23:33:16,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:16,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:16,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:16,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:16,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:17,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:17,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:20,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:20,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 23:33:20,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:33:20,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4152 [2020-10-14 23:33:20,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:20,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:20,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:33:20,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:33:20,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 23:33:20,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:20,776 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-14 23:33:20,989 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-14 23:33:21,146 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2020-10-14 23:33:21,313 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-14 23:33:21,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:21,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:21,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:21,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:21,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:21,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:21,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:21,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:21,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:21,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:21,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:21,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 9 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:33:21,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219063763] [2020-10-14 23:33:21,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:21,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:33:21,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656977997] [2020-10-14 23:33:21,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:33:21,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:21,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:33:21,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:33:21,724 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 21 states. [2020-10-14 23:33:22,363 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-14 23:33:22,715 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-14 23:33:22,882 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-14 23:33:23,112 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 76 [2020-10-14 23:33:23,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:23,774 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2020-10-14 23:33:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:33:23,774 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-10-14 23:33:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:23,775 INFO L225 Difference]: With dead ends: 109 [2020-10-14 23:33:23,776 INFO L226 Difference]: Without dead ends: 101 [2020-10-14 23:33:23,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:33:23,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-14 23:33:23,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2020-10-14 23:33:23,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 23:33:23,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2020-10-14 23:33:23,784 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 65 [2020-10-14 23:33:23,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:23,784 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2020-10-14 23:33:23,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:33:23,784 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2020-10-14 23:33:23,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 23:33:23,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:23,785 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:23,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 23:33:23,785 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:23,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1479480739, now seen corresponding path program 9 times [2020-10-14 23:33:23,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:23,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476429770] [2020-10-14 23:33:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:23,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:23,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:24,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:25,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:25,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 23:33:25,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:33:25,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1765 [2020-10-14 23:33:25,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:25,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:25,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:33:25,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:33:25,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 23:33:25,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:26,141 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-14 23:33:26,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:26,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:26,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:26,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:26,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:26,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:26,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:26,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:26,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:26,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:26,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:26,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:33:26,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476429770] [2020-10-14 23:33:26,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:26,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:33:26,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928163741] [2020-10-14 23:33:26,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:33:26,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:26,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:33:26,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:33:26,831 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand 21 states. [2020-10-14 23:33:27,875 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 76 [2020-10-14 23:33:28,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:28,674 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2020-10-14 23:33:28,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:33:28,674 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-10-14 23:33:28,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:28,676 INFO L225 Difference]: With dead ends: 109 [2020-10-14 23:33:28,676 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 23:33:28,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:33:28,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 23:33:28,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 90. [2020-10-14 23:33:28,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-14 23:33:28,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2020-10-14 23:33:28,685 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 65 [2020-10-14 23:33:28,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:28,686 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2020-10-14 23:33:28,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:33:28,686 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2020-10-14 23:33:28,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 23:33:28,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:28,687 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:28,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 23:33:28,687 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:28,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:28,687 INFO L82 PathProgramCache]: Analyzing trace with hash 401876953, now seen corresponding path program 20 times [2020-10-14 23:33:28,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:28,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257323892] [2020-10-14 23:33:28,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:28,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:28,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:29,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:29,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:29,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:30,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:32,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:33,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:33,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 23:33:33,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:33:33,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-14 23:33:33,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:33,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:33,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:33:33,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:33:33,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 23:33:33,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:34,020 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-14 23:33:35,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:35,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:35,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:35,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:35,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:35,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:35,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:35,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:35,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:35,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:35,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:35,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 30 proven. 114 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:33:35,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257323892] [2020-10-14 23:33:35,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:35,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:33:35,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780835547] [2020-10-14 23:33:35,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:33:35,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:35,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:33:35,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:33:35,046 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 22 states. [2020-10-14 23:33:35,953 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 70 [2020-10-14 23:33:36,141 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2020-10-14 23:33:36,373 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2020-10-14 23:33:36,610 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 70 [2020-10-14 23:33:37,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:37,198 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2020-10-14 23:33:37,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:33:37,198 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 70 [2020-10-14 23:33:37,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:37,200 INFO L225 Difference]: With dead ends: 110 [2020-10-14 23:33:37,200 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 23:33:37,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:33:37,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 23:33:37,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2020-10-14 23:33:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 23:33:37,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2020-10-14 23:33:37,209 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 70 [2020-10-14 23:33:37,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:37,209 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2020-10-14 23:33:37,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:33:37,209 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2020-10-14 23:33:37,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 23:33:37,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:37,209 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:37,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 23:33:37,210 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:37,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:37,210 INFO L82 PathProgramCache]: Analyzing trace with hash 660042391, now seen corresponding path program 21 times [2020-10-14 23:33:37,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:37,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809599743] [2020-10-14 23:33:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:37,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:37,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:37,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:37,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:37,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:38,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:42,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:42,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 23:33:42,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:33:42,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 23:33:42,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:42,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:42,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:33:42,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:33:42,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-14 23:33:42,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:42,849 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-14 23:33:43,124 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-14 23:33:43,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:43,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:43,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:43,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:43,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:43,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:43,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:43,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:43,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:43,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:43,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:43,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:33:43,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809599743] [2020-10-14 23:33:43,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:43,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:33:43,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652729856] [2020-10-14 23:33:43,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:33:43,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:43,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:33:43,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:33:43,645 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand 23 states. [2020-10-14 23:33:44,171 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-10-14 23:33:44,476 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2020-10-14 23:33:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:44,983 INFO L93 Difference]: Finished difference Result 114 states and 127 transitions. [2020-10-14 23:33:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:33:44,983 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 70 [2020-10-14 23:33:44,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:44,984 INFO L225 Difference]: With dead ends: 114 [2020-10-14 23:33:44,985 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 23:33:44,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:33:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 23:33:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 102. [2020-10-14 23:33:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 23:33:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 113 transitions. [2020-10-14 23:33:44,995 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 113 transitions. Word has length 70 [2020-10-14 23:33:44,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:44,996 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 113 transitions. [2020-10-14 23:33:44,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:33:44,996 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 113 transitions. [2020-10-14 23:33:44,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 23:33:44,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:44,997 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:44,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 23:33:44,997 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:44,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:44,997 INFO L82 PathProgramCache]: Analyzing trace with hash -580299055, now seen corresponding path program 22 times [2020-10-14 23:33:44,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:44,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681463784] [2020-10-14 23:33:44,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:45,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:45,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:45,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:45,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:46,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:47,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:50,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:50,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 23:33:50,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:33:50,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 23:33:50,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:50,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:50,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:33:50,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:33:50,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 23:33:50,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:50,552 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-14 23:33:51,014 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-14 23:33:51,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:51,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:51,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:51,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:51,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:51,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:51,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:51,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:51,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:51,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:51,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:51,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 39 proven. 103 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:33:51,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681463784] [2020-10-14 23:33:51,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:51,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:33:51,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240766262] [2020-10-14 23:33:51,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:33:51,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:51,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:33:51,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:33:51,447 INFO L87 Difference]: Start difference. First operand 102 states and 113 transitions. Second operand 21 states. [2020-10-14 23:33:52,142 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2020-10-14 23:33:52,517 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2020-10-14 23:33:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:53,271 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2020-10-14 23:33:53,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:33:53,272 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2020-10-14 23:33:53,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:53,273 INFO L225 Difference]: With dead ends: 118 [2020-10-14 23:33:53,273 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 23:33:53,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:33:53,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 23:33:53,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-10-14 23:33:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 23:33:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2020-10-14 23:33:53,281 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 70 [2020-10-14 23:33:53,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:53,282 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2020-10-14 23:33:53,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:33:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2020-10-14 23:33:53,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 23:33:53,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:53,282 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:53,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 23:33:53,283 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:53,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:53,283 INFO L82 PathProgramCache]: Analyzing trace with hash -322133617, now seen corresponding path program 23 times [2020-10-14 23:33:53,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:53,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004556050] [2020-10-14 23:33:53,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:53,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:53,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:53,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:53,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:54,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:55,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:55,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 23:33:55,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:33:55,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2417 [2020-10-14 23:33:55,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:55,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:55,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:33:55,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:33:55,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 23:33:55,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:56,347 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-10-14 23:33:56,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:33:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:56,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:56,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:33:56,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:33:56,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:33:56,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:33:56,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:33:56,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:33:56,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:33:56,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:33:56,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:33:56,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:33:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 21 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:33:57,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004556050] [2020-10-14 23:33:57,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:33:57,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:33:57,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28749551] [2020-10-14 23:33:57,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:33:57,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:33:57,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:33:57,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:33:57,042 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand 22 states. [2020-10-14 23:33:57,589 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2020-10-14 23:33:58,004 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 82 [2020-10-14 23:33:58,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:33:58,902 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2020-10-14 23:33:58,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:33:58,903 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 70 [2020-10-14 23:33:58,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:33:58,904 INFO L225 Difference]: With dead ends: 119 [2020-10-14 23:33:58,904 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 23:33:58,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:33:58,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 23:33:58,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2020-10-14 23:33:58,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 23:33:58,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2020-10-14 23:33:58,912 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 70 [2020-10-14 23:33:58,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:33:58,912 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2020-10-14 23:33:58,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:33:58,912 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2020-10-14 23:33:58,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 23:33:58,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:33:58,913 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:33:58,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 23:33:58,913 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:33:58,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:33:58,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1452873745, now seen corresponding path program 24 times [2020-10-14 23:33:58,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:33:58,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125416878] [2020-10-14 23:33:58,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:33:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:33:58,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:59,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:33:59,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:00,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:00,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 23:34:00,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:34:00,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1433 [2020-10-14 23:34:00,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:00,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:00,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:34:00,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:00,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 23:34:00,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:01,020 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-10-14 23:34:01,269 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-14 23:34:01,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:01,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:01,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:01,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:01,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:01,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:34:01,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:01,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:01,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:01,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:01,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:01,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:01,844 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 11 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:01,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125416878] [2020-10-14 23:34:01,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:01,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:34:01,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525929681] [2020-10-14 23:34:01,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:34:01,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:01,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:34:01,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:34:01,845 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand 22 states. [2020-10-14 23:34:02,544 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2020-10-14 23:34:02,947 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 78 [2020-10-14 23:34:03,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:03,900 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2020-10-14 23:34:03,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:34:03,901 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 70 [2020-10-14 23:34:03,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:03,902 INFO L225 Difference]: With dead ends: 119 [2020-10-14 23:34:03,902 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 23:34:03,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=130, Invalid=1202, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:34:03,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 23:34:03,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2020-10-14 23:34:03,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 23:34:03,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2020-10-14 23:34:03,915 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 70 [2020-10-14 23:34:03,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:03,916 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2020-10-14 23:34:03,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:34:03,916 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2020-10-14 23:34:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 23:34:03,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:03,917 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:03,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 23:34:03,917 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:03,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1454720787, now seen corresponding path program 10 times [2020-10-14 23:34:03,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:03,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478341359] [2020-10-14 23:34:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:03,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:04,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:04,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 23:34:04,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:04,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-14 23:34:04,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:04,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:04,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:34:04,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:34:04,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 23:34:04,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:04,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:04,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:04,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:04,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:04,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:04,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:34:04,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:04,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:04,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:04,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:04,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:04,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-14 23:34:04,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478341359] [2020-10-14 23:34:04,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:04,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:34:04,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872413480] [2020-10-14 23:34:04,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:34:04,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:04,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:34:04,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:34:04,190 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand 10 states. [2020-10-14 23:34:04,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:04,347 INFO L93 Difference]: Finished difference Result 151 states and 168 transitions. [2020-10-14 23:34:04,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:34:04,348 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-10-14 23:34:04,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:04,349 INFO L225 Difference]: With dead ends: 151 [2020-10-14 23:34:04,349 INFO L226 Difference]: Without dead ends: 79 [2020-10-14 23:34:04,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:34:04,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-14 23:34:04,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2020-10-14 23:34:04,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 23:34:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2020-10-14 23:34:04,356 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 70 [2020-10-14 23:34:04,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:04,357 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2020-10-14 23:34:04,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:34:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2020-10-14 23:34:04,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 23:34:04,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:04,358 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:04,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 23:34:04,358 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:04,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:04,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1750015273, now seen corresponding path program 25 times [2020-10-14 23:34:04,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:04,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197294720] [2020-10-14 23:34:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:04,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:04,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:04,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:06,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:06,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:07,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:07,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:07,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:08,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:09,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:09,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 23:34:09,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 23:34:09,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-14 23:34:09,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:09,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:09,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:34:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 23:34:09,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:10,049 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-14 23:34:10,287 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-14 23:34:10,461 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-14 23:34:10,622 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-14 23:34:10,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:10,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:10,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:10,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:10,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:10,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:34:10,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:10,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:10,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:10,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:10,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:10,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 33 proven. 139 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:34:11,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197294720] [2020-10-14 23:34:11,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:11,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:34:11,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038835435] [2020-10-14 23:34:11,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:34:11,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:11,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:34:11,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:34:11,033 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand 23 states. [2020-10-14 23:34:11,905 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2020-10-14 23:34:12,107 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2020-10-14 23:34:12,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:12,730 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2020-10-14 23:34:12,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:34:12,730 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 75 [2020-10-14 23:34:12,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:12,731 INFO L225 Difference]: With dead ends: 121 [2020-10-14 23:34:12,732 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 23:34:12,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:34:12,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 23:34:12,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2020-10-14 23:34:12,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 23:34:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2020-10-14 23:34:12,740 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 75 [2020-10-14 23:34:12,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:12,740 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2020-10-14 23:34:12,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:34:12,740 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2020-10-14 23:34:12,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 23:34:12,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:12,741 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:12,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 23:34:12,741 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:12,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:12,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2143042283, now seen corresponding path program 26 times [2020-10-14 23:34:12,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:12,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347240343] [2020-10-14 23:34:12,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:12,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:12,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:13,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:13,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:13,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:14,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:16,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:17,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:17,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 23:34:17,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:34:17,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 23:34:17,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:17,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:17,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:34:17,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:17,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 23:34:17,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:18,506 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-14 23:34:18,719 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-10-14 23:34:19,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:19,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:19,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:19,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:19,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:19,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:34:19,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:19,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:19,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:19,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:19,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:19,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 39 proven. 131 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:34:19,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347240343] [2020-10-14 23:34:19,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:19,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:34:19,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382834035] [2020-10-14 23:34:19,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:34:19,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:19,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:34:19,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:34:19,364 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand 23 states. [2020-10-14 23:34:20,034 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2020-10-14 23:34:20,454 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2020-10-14 23:34:20,697 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2020-10-14 23:34:21,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:21,413 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2020-10-14 23:34:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:34:21,414 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 75 [2020-10-14 23:34:21,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:21,415 INFO L225 Difference]: With dead ends: 121 [2020-10-14 23:34:21,415 INFO L226 Difference]: Without dead ends: 107 [2020-10-14 23:34:21,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:34:21,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-14 23:34:21,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-14 23:34:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 23:34:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2020-10-14 23:34:21,427 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 75 [2020-10-14 23:34:21,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:21,427 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2020-10-14 23:34:21,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:34:21,427 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2020-10-14 23:34:21,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 23:34:21,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:21,428 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:21,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 23:34:21,428 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:21,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:21,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1884876845, now seen corresponding path program 27 times [2020-10-14 23:34:21,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:21,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574149331] [2020-10-14 23:34:21,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:21,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:21,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:21,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:21,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:22,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:23,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:26,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:26,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 23:34:26,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:34:26,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 23:34:26,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:26,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:26,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:34:26,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:26,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 23:34:26,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:27,045 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-14 23:34:27,378 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-14 23:34:27,523 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-14 23:34:27,842 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2020-10-14 23:34:28,011 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-14 23:34:28,198 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-14 23:34:28,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:28,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:28,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:28,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:28,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:28,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:34:28,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:28,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:28,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:28,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:28,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:28,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:28,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574149331] [2020-10-14 23:34:28,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:28,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:34:28,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44737773] [2020-10-14 23:34:28,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:34:28,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:28,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:34:28,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:34:28,865 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand 24 states. [2020-10-14 23:34:29,667 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 88 [2020-10-14 23:34:30,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:30,806 INFO L93 Difference]: Finished difference Result 124 states and 137 transitions. [2020-10-14 23:34:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 23:34:30,807 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 75 [2020-10-14 23:34:30,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:30,808 INFO L225 Difference]: With dead ends: 124 [2020-10-14 23:34:30,808 INFO L226 Difference]: Without dead ends: 121 [2020-10-14 23:34:30,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:34:30,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-14 23:34:30,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2020-10-14 23:34:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 23:34:30,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2020-10-14 23:34:30,820 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 75 [2020-10-14 23:34:30,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:30,821 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2020-10-14 23:34:30,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:34:30,821 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2020-10-14 23:34:30,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 23:34:30,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:30,822 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:30,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 23:34:30,822 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:30,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:30,822 INFO L82 PathProgramCache]: Analyzing trace with hash -443020847, now seen corresponding path program 28 times [2020-10-14 23:34:30,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:30,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374813139] [2020-10-14 23:34:30,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:30,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:31,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:32,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:32,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:32,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:32,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:33,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:35,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:35,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 23:34:35,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:34:35,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-14 23:34:35,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:35,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:35,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:34:35,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:35,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 23:34:35,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:36,592 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-14 23:34:37,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:37,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:37,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:37,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:37,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:37,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:34:37,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:37,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:37,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:37,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:37,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:37,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 36 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:34:37,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374813139] [2020-10-14 23:34:37,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:37,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:34:37,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891494542] [2020-10-14 23:34:37,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:34:37,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:37,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:34:37,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:34:37,605 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand 25 states. [2020-10-14 23:34:38,612 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 78 [2020-10-14 23:34:38,931 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 83 [2020-10-14 23:34:39,236 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 83 [2020-10-14 23:34:39,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:39,965 INFO L93 Difference]: Finished difference Result 123 states and 136 transitions. [2020-10-14 23:34:39,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:34:39,965 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2020-10-14 23:34:39,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:39,966 INFO L225 Difference]: With dead ends: 123 [2020-10-14 23:34:39,967 INFO L226 Difference]: Without dead ends: 113 [2020-10-14 23:34:39,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:34:39,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-14 23:34:39,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-14 23:34:39,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-14 23:34:39,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2020-10-14 23:34:39,976 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 80 [2020-10-14 23:34:39,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:39,976 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2020-10-14 23:34:39,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:34:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2020-10-14 23:34:39,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 23:34:39,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:39,977 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:39,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 23:34:39,977 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:39,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:39,977 INFO L82 PathProgramCache]: Analyzing trace with hash -836047857, now seen corresponding path program 29 times [2020-10-14 23:34:39,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:39,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464173851] [2020-10-14 23:34:39,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:39,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:40,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:40,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:41,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:41,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:42,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:45,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:45,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 23:34:45,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:34:45,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-14 23:34:45,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:45,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:45,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:34:45,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:45,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 23:34:45,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:45,601 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-14 23:34:46,074 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-14 23:34:46,222 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-14 23:34:46,544 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2020-10-14 23:34:46,724 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-10-14 23:34:47,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:47,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:47,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:47,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:47,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:47,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:34:47,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:47,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:47,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:47,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:47,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:47,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:34:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 21 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:47,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464173851] [2020-10-14 23:34:47,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:47,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:34:47,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399145706] [2020-10-14 23:34:47,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:34:47,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:47,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:34:47,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:34:47,337 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand 26 states. [2020-10-14 23:34:48,408 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 92 [2020-10-14 23:34:48,688 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 90 [2020-10-14 23:34:49,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:49,587 INFO L93 Difference]: Finished difference Result 165 states and 183 transitions. [2020-10-14 23:34:49,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:34:49,588 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 80 [2020-10-14 23:34:49,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:49,590 INFO L225 Difference]: With dead ends: 165 [2020-10-14 23:34:49,591 INFO L226 Difference]: Without dead ends: 153 [2020-10-14 23:34:49,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=130, Invalid=1276, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:34:49,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-14 23:34:49,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 146. [2020-10-14 23:34:49,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-14 23:34:49,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 158 transitions. [2020-10-14 23:34:49,606 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 158 transitions. Word has length 80 [2020-10-14 23:34:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:49,606 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 158 transitions. [2020-10-14 23:34:49,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:34:49,606 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 158 transitions. [2020-10-14 23:34:49,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 23:34:49,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:49,607 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:49,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 23:34:49,608 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:49,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:49,608 INFO L82 PathProgramCache]: Analyzing trace with hash 938959505, now seen corresponding path program 30 times [2020-10-14 23:34:49,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:49,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087104070] [2020-10-14 23:34:49,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:49,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:49,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:49,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking...