/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/simple-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:03:56,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:03:56,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:03:56,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:03:56,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:03:56,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:03:56,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:03:56,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:03:56,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:03:56,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:03:56,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:03:56,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:03:56,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:03:56,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:03:56,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:03:56,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:03:56,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:03:56,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:03:56,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:03:56,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:03:56,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:03:56,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:03:56,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:03:56,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:03:56,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:03:56,128 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:03:56,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:03:56,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:03:56,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:03:56,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:03:56,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:03:56,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:03:56,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:03:56,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:03:56,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:03:56,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:03:56,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:03:56,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:03:56,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:03:56,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:03:56,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:03:56,147 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 05:03:56,185 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:03:56,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:03:56,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:03:56,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:03:56,188 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:03:56,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:03:56,189 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:03:56,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:03:56,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:03:56,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:03:56,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:03:56,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:03:56,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:03:56,191 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:03:56,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:03:56,193 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:03:56,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:03:56,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:03:56,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:03:56,193 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:03:56,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:03:56,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:03:56,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:03:56,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:03:56,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:03:56,195 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:03:56,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:03:56,195 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:03:56,195 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:03:56,196 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:03:56,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:03:56,548 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:03:56,553 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:03:56,555 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:03:56,555 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:03:56,559 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple-2.i [2020-10-14 05:03:56,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/99b63d0e4/2726053709004b9ba23ce4a105d65f1a/FLAGd7115803a [2020-10-14 05:03:57,261 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:03:57,261 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/simple-2.i [2020-10-14 05:03:57,277 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/99b63d0e4/2726053709004b9ba23ce4a105d65f1a/FLAGd7115803a [2020-10-14 05:03:57,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/99b63d0e4/2726053709004b9ba23ce4a105d65f1a [2020-10-14 05:03:57,566 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:03:57,568 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:03:57,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:03:57,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:03:57,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:03:57,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:03:57" (1/1) ... [2020-10-14 05:03:57,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@248aaf70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:57, skipping insertion in model container [2020-10-14 05:03:57,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:03:57" (1/1) ... [2020-10-14 05:03:57,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:03:57,646 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:03:58,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:03:58,162 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:03:58,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:03:58,307 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:03:58,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:58 WrapperNode [2020-10-14 05:03:58,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:03:58,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:03:58,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:03:58,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:03:58,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:58" (1/1) ... [2020-10-14 05:03:58,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:58" (1/1) ... [2020-10-14 05:03:58,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:58" (1/1) ... [2020-10-14 05:03:58,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:58" (1/1) ... [2020-10-14 05:03:58,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:58" (1/1) ... [2020-10-14 05:03:58,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:58" (1/1) ... [2020-10-14 05:03:58,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:58" (1/1) ... [2020-10-14 05:03:58,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:03:58,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:03:58,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:03:58,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:03:58,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:03:58,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:03:58,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:03:58,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 05:03:58,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 05:03:58,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-14 05:03:58,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-14 05:03:58,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-14 05:03:58,466 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-14 05:03:58,466 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:03:58,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:03:58,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:03:58,467 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 05:03:58,468 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 05:03:58,468 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 05:03:58,468 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 05:03:58,469 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 05:03:58,469 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 05:03:58,469 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 05:03:58,469 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 05:03:58,470 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 05:03:58,470 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 05:03:58,471 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 05:03:58,471 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 05:03:58,471 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 05:03:58,473 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 05:03:58,474 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 05:03:58,474 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 05:03:58,474 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 05:03:58,474 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 05:03:58,474 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-14 05:03:58,475 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-14 05:03:58,475 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-14 05:03:58,475 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 05:03:58,475 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 05:03:58,475 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 05:03:58,475 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 05:03:58,475 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 05:03:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 05:03:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 05:03:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 05:03:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 05:03:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 05:03:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 05:03:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 05:03:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 05:03:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 05:03:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 05:03:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 05:03:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 05:03:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 05:03:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 05:03:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 05:03:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 05:03:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 05:03:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 05:03:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 05:03:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 05:03:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 05:03:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 05:03:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 05:03:58,480 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 05:03:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 05:03:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 05:03:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 05:03:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 05:03:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 05:03:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 05:03:58,482 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 05:03:58,483 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 05:03:58,483 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 05:03:58,484 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 05:03:58,485 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 05:03:58,485 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 05:03:58,485 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 05:03:58,485 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:03:58,485 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 05:03:58,485 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 05:03:58,486 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 05:03:58,486 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 05:03:58,486 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 05:03:58,486 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 05:03:58,487 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 05:03:58,487 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 05:03:58,487 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 05:03:58,487 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 05:03:58,487 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 05:03:58,487 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 05:03:58,487 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 05:03:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 05:03:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 05:03:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 05:03:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 05:03:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 05:03:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 05:03:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 05:03:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 05:03:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 05:03:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 05:03:58,489 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 05:03:58,489 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 05:03:58,489 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 05:03:58,489 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 05:03:58,489 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 05:03:58,489 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 05:03:58,489 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 05:03:58,489 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 05:03:58,489 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 05:03:58,489 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 05:03:58,490 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 05:03:58,490 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 05:03:58,490 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 05:03:58,490 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 05:03:58,490 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 05:03:58,490 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 05:03:58,490 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 05:03:58,491 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 05:03:58,491 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 05:03:58,491 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 05:03:58,492 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-14 05:03:58,492 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:03:58,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 05:03:58,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 05:03:58,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 05:03:58,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 05:03:58,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 05:03:58,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:03:58,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:03:58,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 05:03:58,843 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-14 05:03:58,967 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:03:58,967 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 05:03:58,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:03:58 BoogieIcfgContainer [2020-10-14 05:03:58,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:03:58,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:03:58,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:03:58,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:03:58,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:03:57" (1/3) ... [2020-10-14 05:03:58,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7839a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:03:58, skipping insertion in model container [2020-10-14 05:03:58,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:58" (2/3) ... [2020-10-14 05:03:58,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7839a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:03:58, skipping insertion in model container [2020-10-14 05:03:58,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:03:58" (3/3) ... [2020-10-14 05:03:58,980 INFO L109 eAbstractionObserver]: Analyzing ICFG simple-2.i [2020-10-14 05:03:58,990 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:03:58,996 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:03:59,007 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:03:59,027 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:03:59,027 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:03:59,027 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:03:59,027 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:03:59,027 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:03:59,027 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:03:59,028 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:03:59,028 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:03:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-14 05:03:59,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 05:03:59,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:59,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:59,051 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:59,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:59,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1710443637, now seen corresponding path program 1 times [2020-10-14 05:03:59,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:59,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685732858] [2020-10-14 05:03:59,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:59,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:59,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:59,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:59,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:03:59,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:03:59,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-14 05:03:59,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:59,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:59,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:59,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:03:59,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:59,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-14 05:03:59,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:59,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:59,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:59,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:59,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:59,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 05:03:59,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:59,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:59,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:59,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:59,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:59,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:59,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685732858] [2020-10-14 05:03:59,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:03:59,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:03:59,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068378133] [2020-10-14 05:03:59,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:03:59,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:59,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:03:59,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:03:59,596 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-14 05:03:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:59,692 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-10-14 05:03:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:03:59,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-14 05:03:59,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:59,702 INFO L225 Difference]: With dead ends: 38 [2020-10-14 05:03:59,703 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 05:03:59,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:03:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 05:03:59,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-14 05:03:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-14 05:03:59,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-14 05:03:59,745 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-10-14 05:03:59,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:59,746 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-14 05:03:59,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:03:59,746 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-14 05:03:59,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:03:59,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:59,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:59,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:03:59,748 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:59,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:59,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1041507629, now seen corresponding path program 1 times [2020-10-14 05:03:59,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:59,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862397398] [2020-10-14 05:03:59,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:59,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:59,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:59,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:03:59,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:59,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-14 05:03:59,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:59,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:59,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:03:59,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:03:59,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:03:59,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:59,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:59,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:59,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:59,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:59,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:59,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:03:59,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:59,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:59,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:59,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:59,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:59,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:59,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862397398] [2020-10-14 05:03:59,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:03:59,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 05:03:59,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912274626] [2020-10-14 05:03:59,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:03:59,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:59,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:03:59,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:03:59,921 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-10-14 05:04:00,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:00,026 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-14 05:04:00,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:04:00,027 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-14 05:04:00,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:00,028 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:04:00,028 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 05:04:00,029 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 05:04:00,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 05:04:00,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-10-14 05:04:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 05:04:00,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-14 05:04:00,037 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2020-10-14 05:04:00,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:00,038 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-14 05:04:00,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:04:00,038 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-14 05:04:00,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 05:04:00,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:00,039 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:00,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:04:00,039 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:00,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:00,040 INFO L82 PathProgramCache]: Analyzing trace with hash 714847529, now seen corresponding path program 1 times [2020-10-14 05:04:00,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:00,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175914548] [2020-10-14 05:04:00,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:00,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:00,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:00,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 05:04:00,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:00,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-14 05:04:00,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:00,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:00,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:04:00,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:04:00,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:04:00,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:00,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:00,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:00,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:00,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:00,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:00,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:04:00,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:00,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:00,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:00,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:00,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:00,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:00,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175914548] [2020-10-14 05:04:00,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:00,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:04:00,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700225287] [2020-10-14 05:04:00,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:04:00,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:00,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:04:00,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:04:00,245 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-14 05:04:00,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:00,350 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-14 05:04:00,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:04:00,352 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-14 05:04:00,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:00,353 INFO L225 Difference]: With dead ends: 37 [2020-10-14 05:04:00,353 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 05:04:00,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:04:00,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 05:04:00,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2020-10-14 05:04:00,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 05:04:00,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-14 05:04:00,362 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-14 05:04:00,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:00,362 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-14 05:04:00,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:04:00,362 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-14 05:04:00,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:04:00,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:00,364 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:00,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:04:00,365 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:00,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:00,365 INFO L82 PathProgramCache]: Analyzing trace with hash -158216428, now seen corresponding path program 1 times [2020-10-14 05:04:00,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:00,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256129591] [2020-10-14 05:04:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:00,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:00,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:00,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:04:00,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:00,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-14 05:04:00,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:00,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:00,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:04:00,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:00,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:04:00,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:00,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:00,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:00,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:00,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:00,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:00,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 05:04:00,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:00,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:00,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:00,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:00,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:00,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:04:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:00,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256129591] [2020-10-14 05:04:00,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:00,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:04:00,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408310061] [2020-10-14 05:04:00,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:04:00,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:00,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:04:00,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:04:00,754 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-10-14 05:04:01,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:01,038 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-14 05:04:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:04:01,038 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-14 05:04:01,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:01,040 INFO L225 Difference]: With dead ends: 37 [2020-10-14 05:04:01,040 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 05:04:01,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:04:01,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 05:04:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-10-14 05:04:01,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 05:04:01,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-14 05:04:01,051 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2020-10-14 05:04:01,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:01,052 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-14 05:04:01,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:04:01,054 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-14 05:04:01,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:04:01,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:01,055 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:01,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:04:01,056 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:01,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:01,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1841664542, now seen corresponding path program 1 times [2020-10-14 05:04:01,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:01,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681400250] [2020-10-14 05:04:01,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:01,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:01,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:01,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:04:01,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:01,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-14 05:04:01,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:01,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:01,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:04:01,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:01,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:04:01,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:01,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:01,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:01,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:01,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:01,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:01,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:01,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:01,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:01,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:01,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:01,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:01,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:01,479 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 05:04:01,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681400250] [2020-10-14 05:04:01,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:01,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:04:01,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835186693] [2020-10-14 05:04:01,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:04:01,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:01,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:04:01,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:04:01,482 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 10 states. [2020-10-14 05:04:01,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:01,734 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-14 05:04:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:04:01,735 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-14 05:04:01,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:01,736 INFO L225 Difference]: With dead ends: 40 [2020-10-14 05:04:01,736 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 05:04:01,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:04:01,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 05:04:01,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2020-10-14 05:04:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 05:04:01,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-14 05:04:01,743 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2020-10-14 05:04:01,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:01,744 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-14 05:04:01,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:04:01,744 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-14 05:04:01,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:04:01,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:01,745 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:01,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:04:01,745 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:01,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:01,746 INFO L82 PathProgramCache]: Analyzing trace with hash -2100679301, now seen corresponding path program 2 times [2020-10-14 05:04:01,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:01,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191118982] [2020-10-14 05:04:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:01,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:01,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:01,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:04:01,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:01,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-14 05:04:01,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:01,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:01,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:04:01,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:01,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:04:01,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:02,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:02,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:02,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:02,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:02,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:02,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 05:04:02,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:02,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:02,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:02,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:02,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:02,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:02,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191118982] [2020-10-14 05:04:02,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:02,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:04:02,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569773878] [2020-10-14 05:04:02,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:04:02,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:02,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:04:02,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:04:02,169 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 11 states. [2020-10-14 05:04:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:02,379 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-14 05:04:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:04:02,379 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-14 05:04:02,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:02,380 INFO L225 Difference]: With dead ends: 35 [2020-10-14 05:04:02,380 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 05:04:02,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:04:02,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 05:04:02,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-14 05:04:02,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 05:04:02,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-14 05:04:02,391 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 22 [2020-10-14 05:04:02,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:02,392 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-14 05:04:02,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:04:02,392 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-14 05:04:02,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:04:02,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:02,394 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:02,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:04:02,394 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:02,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:02,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1111313324, now seen corresponding path program 2 times [2020-10-14 05:04:02,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:02,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213401010] [2020-10-14 05:04:02,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:02,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:02,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:02,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:04:02,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:02,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-14 05:04:02,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:02,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:02,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:04:02,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:02,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:04:02,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:02,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:02,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:02,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:02,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:02,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:02,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 05:04:02,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:02,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:02,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:02,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:02,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:02,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:04:02,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:02,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213401010] [2020-10-14 05:04:02,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:02,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:04:02,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790027411] [2020-10-14 05:04:02,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:04:02,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:02,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:04:02,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:04:02,992 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2020-10-14 05:04:03,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:03,215 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-14 05:04:03,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:04:03,216 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-14 05:04:03,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:03,216 INFO L225 Difference]: With dead ends: 42 [2020-10-14 05:04:03,217 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 05:04:03,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:04:03,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 05:04:03,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-14 05:04:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 05:04:03,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-14 05:04:03,227 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2020-10-14 05:04:03,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:03,227 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-14 05:04:03,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:04:03,227 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-14 05:04:03,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:04:03,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:03,228 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:03,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:04:03,228 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:03,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:03,229 INFO L82 PathProgramCache]: Analyzing trace with hash 636232219, now seen corresponding path program 3 times [2020-10-14 05:04:03,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:03,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931320957] [2020-10-14 05:04:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:03,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:03,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:03,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:04:03,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:03,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-14 05:04:03,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:03,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:03,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:04:03,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:03,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:04:03,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:03,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:03,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:03,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:03,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:03,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:03,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:04:03,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:03,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:03,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:03,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:03,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:03,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:04:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:03,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931320957] [2020-10-14 05:04:03,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:03,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:04:03,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210410770] [2020-10-14 05:04:03,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:04:03,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:03,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:04:03,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:04:03,815 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 12 states. [2020-10-14 05:04:04,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:04,364 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-14 05:04:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:04:04,365 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-14 05:04:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:04,366 INFO L225 Difference]: With dead ends: 42 [2020-10-14 05:04:04,366 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 05:04:04,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:04:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 05:04:04,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-10-14 05:04:04,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 05:04:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-14 05:04:04,374 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2020-10-14 05:04:04,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:04,374 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-14 05:04:04,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:04:04,375 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-14 05:04:04,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:04:04,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:04,376 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:04,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:04:04,377 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:04,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:04,377 INFO L82 PathProgramCache]: Analyzing trace with hash 308177275, now seen corresponding path program 4 times [2020-10-14 05:04:04,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:04,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788930841] [2020-10-14 05:04:04,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:04,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:04,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:04,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:04:04,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:04,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-14 05:04:04,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:04,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:04,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:04:04,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:04,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:04:04,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:04,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:04,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:04,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:04,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:04,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:04,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:04,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:04,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:04,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:04,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:04,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:04,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:04,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788930841] [2020-10-14 05:04:04,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:04,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:04:04,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406607095] [2020-10-14 05:04:04,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:04:04,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:04,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:04:04,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:04:04,987 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 13 states. [2020-10-14 05:04:05,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:05,410 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-14 05:04:05,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:04:05,411 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-14 05:04:05,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:05,411 INFO L225 Difference]: With dead ends: 45 [2020-10-14 05:04:05,412 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 05:04:05,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:04:05,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 05:04:05,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-10-14 05:04:05,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:04:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-14 05:04:05,421 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 28 [2020-10-14 05:04:05,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:05,422 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-14 05:04:05,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:04:05,422 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-14 05:04:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 05:04:05,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:05,426 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:05,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:04:05,426 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:05,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:05,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1690767828, now seen corresponding path program 5 times [2020-10-14 05:04:05,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:05,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382353179] [2020-10-14 05:04:05,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:05,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:05,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:05,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:04:05,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:05,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-14 05:04:05,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:05,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:05,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:04:05,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:05,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:04:05,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:06,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:06,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:06,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:06,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:06,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:06,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:06,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:06,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:06,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:06,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:06,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:06,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:06,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382353179] [2020-10-14 05:04:06,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:06,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:04:06,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136733372] [2020-10-14 05:04:06,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:04:06,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:06,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:04:06,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:04:06,414 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 14 states. [2020-10-14 05:04:07,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:07,122 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2020-10-14 05:04:07,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:04:07,123 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-14 05:04:07,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:07,124 INFO L225 Difference]: With dead ends: 55 [2020-10-14 05:04:07,124 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 05:04:07,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:04:07,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 05:04:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2020-10-14 05:04:07,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 05:04:07,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-14 05:04:07,132 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 29 [2020-10-14 05:04:07,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:07,132 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-14 05:04:07,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:04:07,132 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-14 05:04:07,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 05:04:07,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:07,133 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:07,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:04:07,134 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:07,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:07,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1726061029, now seen corresponding path program 6 times [2020-10-14 05:04:07,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:07,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357163611] [2020-10-14 05:04:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:07,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:07,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:07,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 05:04:07,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:07,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-14 05:04:07,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:07,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:07,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:04:07,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:07,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:04:07,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:07,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:07,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:07,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:07,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:07,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:07,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:07,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:07,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:07,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:07,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:07,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:07,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:07,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357163611] [2020-10-14 05:04:07,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:07,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:04:07,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039698924] [2020-10-14 05:04:07,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:04:07,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:07,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:04:07,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:04:07,821 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 13 states. [2020-10-14 05:04:08,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:08,170 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-14 05:04:08,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:04:08,171 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-14 05:04:08,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:08,172 INFO L225 Difference]: With dead ends: 57 [2020-10-14 05:04:08,172 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 05:04:08,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:04:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 05:04:08,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-14 05:04:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 05:04:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-14 05:04:08,183 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2020-10-14 05:04:08,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:08,186 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-14 05:04:08,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:04:08,186 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-14 05:04:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:04:08,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:08,187 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:08,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:04:08,187 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:08,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:08,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1707265246, now seen corresponding path program 7 times [2020-10-14 05:04:08,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:08,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128944550] [2020-10-14 05:04:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:08,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:08,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:08,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:04:08,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:08,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-14 05:04:08,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:08,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:08,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:04:08,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:08,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:04:08,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:09,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:09,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:09,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:09,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:09,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:09,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:09,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:09,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:09,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:09,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:09,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:09,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:09,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128944550] [2020-10-14 05:04:09,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:09,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:04:09,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83677350] [2020-10-14 05:04:09,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:04:09,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:09,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:04:09,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:04:09,154 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 15 states. [2020-10-14 05:04:09,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:09,874 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-14 05:04:09,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:04:09,875 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-14 05:04:09,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:09,876 INFO L225 Difference]: With dead ends: 49 [2020-10-14 05:04:09,876 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 05:04:09,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:04:09,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 05:04:09,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-14 05:04:09,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:04:09,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-14 05:04:09,884 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 32 [2020-10-14 05:04:09,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:09,885 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-14 05:04:09,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:04:09,885 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-14 05:04:09,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:04:09,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:09,886 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:09,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:04:09,886 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:09,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:09,887 INFO L82 PathProgramCache]: Analyzing trace with hash -658408179, now seen corresponding path program 8 times [2020-10-14 05:04:09,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:09,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714811039] [2020-10-14 05:04:09,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:09,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:10,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:10,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 05:04:10,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:10,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-10-14 05:04:10,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:10,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:10,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:04:10,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:10,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:04:10,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:10,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:10,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:10,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:10,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:10,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:10,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:10,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:10,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:10,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:10,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:10,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:10,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:10,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714811039] [2020-10-14 05:04:10,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:10,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:04:10,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474386213] [2020-10-14 05:04:10,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:04:10,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:10,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:04:10,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:04:10,827 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-10-14 05:04:11,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:11,427 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-14 05:04:11,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:04:11,427 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-14 05:04:11,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:11,428 INFO L225 Difference]: With dead ends: 49 [2020-10-14 05:04:11,428 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 05:04:11,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:04:11,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 05:04:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-14 05:04:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:04:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-14 05:04:11,445 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 33 [2020-10-14 05:04:11,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:11,446 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-14 05:04:11,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:04:11,446 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-14 05:04:11,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 05:04:11,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:11,447 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:11,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:04:11,447 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:11,448 INFO L82 PathProgramCache]: Analyzing trace with hash -131406060, now seen corresponding path program 9 times [2020-10-14 05:04:11,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:11,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393075129] [2020-10-14 05:04:11,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:11,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:11,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:11,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 05:04:11,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:11,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-14 05:04:11,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:11,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:11,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:04:11,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:11,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:04:11,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:04:12,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:12,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:12,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:12,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:12,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:12,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:12,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:12,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:12,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:12,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:12,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:12,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:12,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393075129] [2020-10-14 05:04:12,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:12,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:04:12,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910867941] [2020-10-14 05:04:12,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:04:12,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:12,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:04:12,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:04:12,550 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-10-14 05:04:13,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:13,415 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-14 05:04:13,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:04:13,419 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-14 05:04:13,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:13,420 INFO L225 Difference]: With dead ends: 54 [2020-10-14 05:04:13,420 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 05:04:13,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:04:13,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 05:04:13,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2020-10-14 05:04:13,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 05:04:13,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-14 05:04:13,427 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2020-10-14 05:04:13,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:13,427 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-14 05:04:13,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:04:13,428 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-14 05:04:13,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:04:13,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:13,429 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:13,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:04:13,429 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:13,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:13,429 INFO L82 PathProgramCache]: Analyzing trace with hash 482398537, now seen corresponding path program 10 times [2020-10-14 05:04:13,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:13,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475809966] [2020-10-14 05:04:13,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:13,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:13,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:13,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:04:13,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:13,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 538 [2020-10-14 05:04:13,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:13,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:13,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:04:13,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:13,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:04:13,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:14,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:14,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:14,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:14,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:14,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:14,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:14,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:14,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:14,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:14,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:14,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:14,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:14,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475809966] [2020-10-14 05:04:14,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:14,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:04:14,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152840977] [2020-10-14 05:04:14,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:04:14,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:14,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:04:14,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:04:14,690 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 17 states. [2020-10-14 05:04:15,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:15,565 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-14 05:04:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:04:15,565 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-10-14 05:04:15,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:15,566 INFO L225 Difference]: With dead ends: 55 [2020-10-14 05:04:15,566 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 05:04:15,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:04:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 05:04:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2020-10-14 05:04:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 05:04:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-14 05:04:15,582 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 36 [2020-10-14 05:04:15,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:15,582 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-14 05:04:15,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:04:15,582 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-14 05:04:15,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:04:15,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:15,583 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:15,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:04:15,583 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:15,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:15,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1997908510, now seen corresponding path program 11 times [2020-10-14 05:04:15,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:15,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392586390] [2020-10-14 05:04:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:15,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:16,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:16,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:04:16,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:16,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 409 [2020-10-14 05:04:16,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:16,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:16,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:04:16,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:16,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 05:04:16,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:16,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:16,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:16,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:16,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:16,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:16,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:16,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:16,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:16,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:16,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:16,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:16,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:16,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392586390] [2020-10-14 05:04:16,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:16,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:04:16,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115067510] [2020-10-14 05:04:16,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:04:16,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:16,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:04:16,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:04:16,624 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 16 states. [2020-10-14 05:04:17,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:17,233 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-14 05:04:17,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:04:17,234 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-14 05:04:17,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:17,235 INFO L225 Difference]: With dead ends: 61 [2020-10-14 05:04:17,235 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 05:04:17,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:04:17,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 05:04:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-14 05:04:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 05:04:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-14 05:04:17,242 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2020-10-14 05:04:17,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:17,243 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-14 05:04:17,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:04:17,243 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-14 05:04:17,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 05:04:17,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:17,244 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:17,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:04:17,244 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:17,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:17,244 INFO L82 PathProgramCache]: Analyzing trace with hash 179061645, now seen corresponding path program 12 times [2020-10-14 05:04:17,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:17,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277141040] [2020-10-14 05:04:17,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:17,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:17,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:17,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 05:04:17,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:17,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 524 [2020-10-14 05:04:17,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:17,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:17,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:04:17,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:17,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 05:04:17,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:18,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:18,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:18,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:18,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:18,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:18,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:18,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:18,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:18,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:18,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:18,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:18,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:18,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277141040] [2020-10-14 05:04:18,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:18,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:04:18,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511141099] [2020-10-14 05:04:18,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:04:18,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:18,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:04:18,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:04:18,814 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2020-10-14 05:04:19,727 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2020-10-14 05:04:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:20,134 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-14 05:04:20,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:04:20,135 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-10-14 05:04:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:20,136 INFO L225 Difference]: With dead ends: 61 [2020-10-14 05:04:20,136 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 05:04:20,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:04:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 05:04:20,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2020-10-14 05:04:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 05:04:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-14 05:04:20,148 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 39 [2020-10-14 05:04:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:20,149 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-14 05:04:20,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:04:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-14 05:04:20,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:04:20,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:20,150 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:20,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:04:20,151 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:20,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:20,151 INFO L82 PathProgramCache]: Analyzing trace with hash 80902857, now seen corresponding path program 13 times [2020-10-14 05:04:20,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:20,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241894991] [2020-10-14 05:04:20,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:20,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:20,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:20,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:04:20,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:20,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-14 05:04:20,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:20,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:20,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:04:20,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:20,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 05:04:20,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:04:21,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:21,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:21,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:21,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:21,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:21,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:21,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:21,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:21,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:21,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:21,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:21,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:21,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241894991] [2020-10-14 05:04:21,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:21,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:04:21,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243046749] [2020-10-14 05:04:21,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:04:21,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:21,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:04:21,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:04:21,843 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 19 states. [2020-10-14 05:04:22,476 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-10-14 05:04:23,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:23,022 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-14 05:04:23,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:04:23,023 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-14 05:04:23,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:23,024 INFO L225 Difference]: With dead ends: 64 [2020-10-14 05:04:23,024 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 05:04:23,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:04:23,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 05:04:23,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-14 05:04:23,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 05:04:23,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-14 05:04:23,034 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 42 [2020-10-14 05:04:23,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:23,034 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-14 05:04:23,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:04:23,034 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-14 05:04:23,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 05:04:23,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:23,035 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:23,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:04:23,035 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:23,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:23,036 INFO L82 PathProgramCache]: Analyzing trace with hash 197704582, now seen corresponding path program 14 times [2020-10-14 05:04:23,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:23,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692474668] [2020-10-14 05:04:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:23,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:23,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:23,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 05:04:23,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:23,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-10-14 05:04:23,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:23,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:23,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:04:23,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:23,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 05:04:23,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:24,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:24,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:24,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:24,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:24,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:24,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:24,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:24,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:24,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:24,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:24,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:24,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:24,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692474668] [2020-10-14 05:04:24,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:24,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:04:24,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432225509] [2020-10-14 05:04:24,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:04:24,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:24,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:04:24,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:04:24,752 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 20 states. [2020-10-14 05:04:25,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:25,589 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-14 05:04:25,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:04:25,589 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2020-10-14 05:04:25,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:25,590 INFO L225 Difference]: With dead ends: 65 [2020-10-14 05:04:25,590 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 05:04:25,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:04:25,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 05:04:25,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-10-14 05:04:25,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 05:04:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-14 05:04:25,603 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 43 [2020-10-14 05:04:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:25,604 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-14 05:04:25,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:04:25,604 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-14 05:04:25,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 05:04:25,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:25,605 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:25,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:04:25,605 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:25,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:25,605 INFO L82 PathProgramCache]: Analyzing trace with hash 705178125, now seen corresponding path program 15 times [2020-10-14 05:04:25,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:25,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511598807] [2020-10-14 05:04:25,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:25,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:26,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:26,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 05:04:26,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:26,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 673 [2020-10-14 05:04:26,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:26,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:26,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:04:26,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:26,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 05:04:26,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:27,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:27,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:27,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:27,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:27,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:27,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:27,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:27,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:27,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:27,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:27,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:27,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:27,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511598807] [2020-10-14 05:04:27,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:27,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:04:27,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057269068] [2020-10-14 05:04:27,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:04:27,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:27,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:04:27,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:04:27,392 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 19 states. [2020-10-14 05:04:27,982 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-10-14 05:04:28,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:28,496 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-14 05:04:28,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:04:28,497 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-14 05:04:28,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:28,497 INFO L225 Difference]: With dead ends: 71 [2020-10-14 05:04:28,498 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 05:04:28,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:04:28,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 05:04:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-14 05:04:28,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 05:04:28,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-14 05:04:28,504 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 45 [2020-10-14 05:04:28,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:28,505 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-14 05:04:28,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:04:28,505 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-14 05:04:28,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:04:28,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:28,506 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:28,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:04:28,506 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:28,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:28,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1421857840, now seen corresponding path program 16 times [2020-10-14 05:04:28,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:28,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571980538] [2020-10-14 05:04:28,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:28,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:29,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:29,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:04:29,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:29,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 889 [2020-10-14 05:04:29,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:29,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:29,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:04:29,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:29,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 05:04:29,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:29,824 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-14 05:04:30,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:30,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:30,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:30,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:30,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:30,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:30,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:30,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:30,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:30,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:30,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:30,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:30,501 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 05:04:30,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571980538] [2020-10-14 05:04:30,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:30,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:04:30,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558519406] [2020-10-14 05:04:30,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:04:30,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:30,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:04:30,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:04:30,503 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 21 states. [2020-10-14 05:04:31,391 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 79 [2020-10-14 05:04:31,837 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2020-10-14 05:04:32,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:32,434 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-14 05:04:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:04:32,434 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-14 05:04:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:32,435 INFO L225 Difference]: With dead ends: 71 [2020-10-14 05:04:32,435 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 05:04:32,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:04:32,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 05:04:32,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-14 05:04:32,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:04:32,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-14 05:04:32,443 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 46 [2020-10-14 05:04:32,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:32,443 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-14 05:04:32,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:04:32,444 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-14 05:04:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 05:04:32,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:32,444 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:32,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:04:32,445 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:32,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:32,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1604256582, now seen corresponding path program 17 times [2020-10-14 05:04:32,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:32,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558862879] [2020-10-14 05:04:32,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:32,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:33,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:33,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 05:04:33,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:33,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1135 [2020-10-14 05:04:33,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:33,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:33,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:04:33,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:33,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 05:04:33,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:34,348 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-10-14 05:04:35,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:35,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:35,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:35,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:35,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:35,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:35,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:35,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:35,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:35,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:35,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:35,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:35,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558862879] [2020-10-14 05:04:35,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:35,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:04:35,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644696878] [2020-10-14 05:04:35,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:04:35,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:35,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:04:35,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:04:35,200 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2020-10-14 05:04:35,966 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-14 05:04:36,321 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2020-10-14 05:04:37,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:37,112 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-14 05:04:37,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:04:37,113 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-14 05:04:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:37,115 INFO L225 Difference]: With dead ends: 74 [2020-10-14 05:04:37,115 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 05:04:37,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=136, Invalid=1270, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:04:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 05:04:37,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-14 05:04:37,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 05:04:37,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-14 05:04:37,124 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-10-14 05:04:37,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:37,124 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-14 05:04:37,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:04:37,124 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-14 05:04:37,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:04:37,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:37,125 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:37,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:04:37,125 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:37,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:37,126 INFO L82 PathProgramCache]: Analyzing trace with hash -771481065, now seen corresponding path program 18 times [2020-10-14 05:04:37,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:37,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446983247] [2020-10-14 05:04:37,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:37,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:38,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:38,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:04:38,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:38,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1013 [2020-10-14 05:04:38,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:38,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:38,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:04:38,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:38,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 05:04:38,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:38,661 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-14 05:04:38,862 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-14 05:04:39,144 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-14 05:04:39,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:39,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:39,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:39,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:39,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:39,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:39,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:39,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:39,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:39,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:39,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:39,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:39,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446983247] [2020-10-14 05:04:39,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:39,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:04:39,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696651499] [2020-10-14 05:04:39,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:04:39,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:39,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:04:39,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:04:39,608 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 23 states. [2020-10-14 05:04:40,367 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-14 05:04:40,730 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2020-10-14 05:04:41,067 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2020-10-14 05:04:41,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:41,714 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2020-10-14 05:04:41,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:04:41,715 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-14 05:04:41,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:41,716 INFO L225 Difference]: With dead ends: 91 [2020-10-14 05:04:41,716 INFO L226 Difference]: Without dead ends: 89 [2020-10-14 05:04:41,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:04:41,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-14 05:04:41,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2020-10-14 05:04:41,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 05:04:41,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-14 05:04:41,725 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 50 [2020-10-14 05:04:41,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:41,725 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-14 05:04:41,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:04:41,726 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-14 05:04:41,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:04:41,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:41,726 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:41,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:04:41,727 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:41,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:41,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1983417232, now seen corresponding path program 19 times [2020-10-14 05:04:41,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:41,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673851863] [2020-10-14 05:04:41,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:41,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:42,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:42,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 05:04:42,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:42,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-10-14 05:04:42,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:42,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:42,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:04:42,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:42,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 05:04:42,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:43,267 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-14 05:04:43,520 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-14 05:04:43,749 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-10-14 05:04:44,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:44,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:44,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:44,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:44,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:44,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:44,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:44,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:44,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:44,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:44,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:44,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 6 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:44,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673851863] [2020-10-14 05:04:44,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:44,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:04:44,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189163299] [2020-10-14 05:04:44,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:04:44,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:44,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:04:44,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:04:44,305 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 22 states. [2020-10-14 05:04:44,793 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2020-10-14 05:04:45,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:45,492 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2020-10-14 05:04:45,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:04:45,494 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-14 05:04:45,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:45,494 INFO L225 Difference]: With dead ends: 87 [2020-10-14 05:04:45,495 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 05:04:45,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:04:45,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 05:04:45,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-10-14 05:04:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 05:04:45,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-14 05:04:45,505 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2020-10-14 05:04:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:45,505 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-14 05:04:45,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:04:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-14 05:04:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 05:04:45,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:45,506 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:45,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:04:45,506 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:45,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:45,507 INFO L82 PathProgramCache]: Analyzing trace with hash -817588225, now seen corresponding path program 20 times [2020-10-14 05:04:45,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:45,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760623804] [2020-10-14 05:04:45,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:45,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:47,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:47,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:04:47,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:47,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1482 [2020-10-14 05:04:47,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:47,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:47,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:04:47,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:47,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 05:04:47,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:47,965 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-14 05:04:48,149 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-10-14 05:04:48,542 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2020-10-14 05:04:48,748 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2020-10-14 05:04:49,013 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2020-10-14 05:04:49,204 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-14 05:04:49,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:49,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:49,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:49,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:49,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:49,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:49,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:49,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:49,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:49,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:49,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:49,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:49,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760623804] [2020-10-14 05:04:49,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:49,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:04:49,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693412507] [2020-10-14 05:04:49,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:04:49,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:49,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:04:49,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:04:49,711 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 24 states. [2020-10-14 05:04:50,395 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-14 05:04:50,747 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-14 05:04:51,200 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-14 05:04:51,407 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-14 05:04:51,822 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 105 [2020-10-14 05:04:52,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:52,733 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-14 05:04:52,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:04:52,733 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-14 05:04:52,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:52,734 INFO L225 Difference]: With dead ends: 78 [2020-10-14 05:04:52,734 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 05:04:52,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=166, Invalid=1814, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:04:52,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 05:04:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-10-14 05:04:52,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 05:04:52,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-14 05:04:52,743 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 53 [2020-10-14 05:04:52,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:52,743 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-14 05:04:52,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:04:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-14 05:04:52,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 05:04:52,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:52,744 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:52,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:04:52,745 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:52,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:52,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1460741246, now seen corresponding path program 21 times [2020-10-14 05:04:52,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:52,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126472226] [2020-10-14 05:04:52,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:52,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:54,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:54,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 05:04:54,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:54,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1212 [2020-10-14 05:04:54,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:54,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:54,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:04:54,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:54,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 05:04:54,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:54,877 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-14 05:04:55,101 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-14 05:04:55,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:55,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:55,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:55,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:55,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:55,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:55,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:55,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:55,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:55,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:55,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:55,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:55,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126472226] [2020-10-14 05:04:55,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:55,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:04:55,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508383747] [2020-10-14 05:04:55,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:04:55,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:55,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:04:55,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:04:55,914 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 25 states. [2020-10-14 05:04:56,725 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2020-10-14 05:04:56,982 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 84 [2020-10-14 05:04:57,261 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 77 [2020-10-14 05:04:57,569 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 82 [2020-10-14 05:04:58,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:58,087 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-14 05:04:58,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:04:58,088 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-14 05:04:58,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:58,089 INFO L225 Difference]: With dead ends: 79 [2020-10-14 05:04:58,090 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 05:04:58,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:04:58,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 05:04:58,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-14 05:04:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 05:04:58,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-14 05:04:58,100 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 54 [2020-10-14 05:04:58,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:58,101 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-14 05:04:58,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:04:58,101 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-14 05:04:58,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:04:58,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:58,101 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:58,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:04:58,102 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:58,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:58,102 INFO L82 PathProgramCache]: Analyzing trace with hash -6457065, now seen corresponding path program 22 times [2020-10-14 05:04:58,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:58,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974487040] [2020-10-14 05:04:58,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:58,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:59,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:59,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:04:59,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:59,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1077 [2020-10-14 05:04:59,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:59,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:59,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:04:59,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:59,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 05:04:59,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:59,804 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-14 05:05:00,098 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-14 05:05:00,396 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-14 05:05:00,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:00,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:00,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:00,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:00,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:00,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:00,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:00,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:00,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:00,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:00,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:00,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:00,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974487040] [2020-10-14 05:05:00,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:00,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:05:00,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048125858] [2020-10-14 05:05:00,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:05:00,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:00,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:05:00,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:05:00,970 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 25 states. [2020-10-14 05:05:01,985 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 87 [2020-10-14 05:05:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:02,887 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-14 05:05:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:05:02,889 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-14 05:05:02,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:02,889 INFO L225 Difference]: With dead ends: 84 [2020-10-14 05:05:02,890 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 05:05:02,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:05:02,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 05:05:02,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2020-10-14 05:05:02,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:05:02,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-14 05:05:02,898 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 56 [2020-10-14 05:05:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:02,898 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-14 05:05:02,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:05:02,898 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-14 05:05:02,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 05:05:02,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:02,899 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:02,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:05:02,899 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:02,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:02,899 INFO L82 PathProgramCache]: Analyzing trace with hash 338634808, now seen corresponding path program 23 times [2020-10-14 05:05:02,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:02,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495603996] [2020-10-14 05:05:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:03,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:03,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:03,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 05:05:03,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:03,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-10-14 05:05:03,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:03,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:03,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:05:03,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:03,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 05:05:03,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:04,630 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-14 05:05:04,944 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-14 05:05:05,086 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-14 05:05:05,348 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-14 05:05:05,609 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2020-10-14 05:05:05,915 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-14 05:05:06,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:06,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:06,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:06,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:06,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:06,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:06,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:06,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:06,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:06,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:06,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:06,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:06,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495603996] [2020-10-14 05:05:06,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:06,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:05:06,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76862743] [2020-10-14 05:05:06,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:05:06,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:06,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:05:06,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:05:06,435 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2020-10-14 05:05:07,292 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 77 [2020-10-14 05:05:07,711 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 87 [2020-10-14 05:05:08,143 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 95 [2020-10-14 05:05:08,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:08,983 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-10-14 05:05:08,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 05:05:08,983 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-10-14 05:05:08,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:08,985 INFO L225 Difference]: With dead ends: 104 [2020-10-14 05:05:08,985 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 05:05:08,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=169, Invalid=1723, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 05:05:08,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 05:05:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 70. [2020-10-14 05:05:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 05:05:08,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-14 05:05:08,994 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 57 [2020-10-14 05:05:08,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:08,994 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-14 05:05:08,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:05:08,994 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-14 05:05:08,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 05:05:08,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:08,995 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:08,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:05:08,995 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:08,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:08,996 INFO L82 PathProgramCache]: Analyzing trace with hash 915923199, now seen corresponding path program 24 times [2020-10-14 05:05:08,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:08,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952473528] [2020-10-14 05:05:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:09,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:10,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:10,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 05:05:10,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:10,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1031 [2020-10-14 05:05:10,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:10,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:10,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:05:10,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:10,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 05:05:10,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:10,389 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-14 05:05:10,767 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-14 05:05:10,929 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-14 05:05:11,191 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-10-14 05:05:11,328 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-14 05:05:11,488 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-14 05:05:11,639 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-14 05:05:12,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:12,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:12,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:12,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:12,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:12,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:12,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:12,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:12,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:12,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:12,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:12,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 7 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:12,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952473528] [2020-10-14 05:05:12,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:12,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:05:12,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990416409] [2020-10-14 05:05:12,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:05:12,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:12,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:05:12,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:05:12,358 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 25 states. [2020-10-14 05:05:13,338 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 05:05:13,765 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 88 [2020-10-14 05:05:14,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:14,596 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2020-10-14 05:05:14,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:05:14,597 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-14 05:05:14,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:14,598 INFO L225 Difference]: With dead ends: 97 [2020-10-14 05:05:14,598 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 05:05:14,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:05:14,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 05:05:14,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-10-14 05:05:14,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 05:05:14,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-14 05:05:14,610 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2020-10-14 05:05:14,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:14,610 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-14 05:05:14,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:05:14,611 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-14 05:05:14,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:05:14,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:14,611 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:14,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:05:14,612 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:14,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:14,612 INFO L82 PathProgramCache]: Analyzing trace with hash -603794882, now seen corresponding path program 25 times [2020-10-14 05:05:14,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:14,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787621942] [2020-10-14 05:05:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:14,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:15,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:15,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:05:15,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:15,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1074 [2020-10-14 05:05:15,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:15,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:15,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:05:15,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:15,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 05:05:15,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:16,197 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-14 05:05:16,410 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-14 05:05:16,718 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-14 05:05:17,018 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-14 05:05:17,212 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2020-10-14 05:05:17,408 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-14 05:05:18,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:18,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:18,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:18,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:18,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:18,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:18,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:18,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:18,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:18,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:18,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:18,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:18,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787621942] [2020-10-14 05:05:18,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:18,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:05:18,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083928204] [2020-10-14 05:05:18,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:05:18,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:18,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:05:18,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:05:18,075 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 27 states. [2020-10-14 05:05:18,970 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 78 [2020-10-14 05:05:19,171 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 05:05:19,422 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-14 05:05:19,664 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-14 05:05:19,978 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 98 [2020-10-14 05:05:20,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:20,957 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-14 05:05:20,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:05:20,957 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-14 05:05:20,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:20,958 INFO L225 Difference]: With dead ends: 88 [2020-10-14 05:05:20,959 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 05:05:20,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=171, Invalid=1899, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 05:05:20,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 05:05:20,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2020-10-14 05:05:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 05:05:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-14 05:05:20,970 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 60 [2020-10-14 05:05:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:20,970 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-14 05:05:20,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:05:20,970 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-14 05:05:20,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 05:05:20,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:20,970 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:20,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:05:20,971 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:20,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:20,971 INFO L82 PathProgramCache]: Analyzing trace with hash -998968335, now seen corresponding path program 26 times [2020-10-14 05:05:20,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:20,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577121931] [2020-10-14 05:05:20,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:21,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:22,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:22,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 05:05:22,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:22,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1262 [2020-10-14 05:05:22,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:22,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:22,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:05:22,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:22,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 05:05:22,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:22,730 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-14 05:05:22,909 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-14 05:05:23,164 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-14 05:05:23,327 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-10-14 05:05:23,567 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-10-14 05:05:24,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:24,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:24,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:24,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:24,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:24,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:24,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:24,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:24,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:24,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:24,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:24,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:05:24,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577121931] [2020-10-14 05:05:24,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:24,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:05:24,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002420860] [2020-10-14 05:05:24,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:05:24,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:24,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:05:24,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:05:24,581 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 27 states. [2020-10-14 05:05:25,365 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 77 [2020-10-14 05:05:25,547 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 05:05:25,769 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-14 05:05:26,021 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-14 05:05:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:26,631 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-14 05:05:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:05:26,632 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-14 05:05:26,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:26,633 INFO L225 Difference]: With dead ends: 89 [2020-10-14 05:05:26,633 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 05:05:26,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=156, Invalid=1566, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 05:05:26,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 05:05:26,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-10-14 05:05:26,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 05:05:26,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-14 05:05:26,647 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 61 [2020-10-14 05:05:26,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:26,647 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-14 05:05:26,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:05:26,648 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-14 05:05:26,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 05:05:26,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:26,648 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:26,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:05:26,649 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:26,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:26,650 INFO L82 PathProgramCache]: Analyzing trace with hash -325475720, now seen corresponding path program 27 times [2020-10-14 05:05:26,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:26,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320739248] [2020-10-14 05:05:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:26,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:28,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:28,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 05:05:28,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:28,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1530 [2020-10-14 05:05:28,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:28,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:28,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:05:28,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:28,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 05:05:28,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:28,878 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-14 05:05:29,265 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-14 05:05:29,555 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-14 05:05:29,698 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-14 05:05:29,954 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2020-10-14 05:05:30,139 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-14 05:05:30,331 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-14 05:05:30,524 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-10-14 05:05:31,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:31,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:31,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:31,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:31,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:31,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:05:31,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:31,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:31,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:31,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:31,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:31,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:31,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320739248] [2020-10-14 05:05:31,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:31,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:05:31,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715692488] [2020-10-14 05:05:31,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:05:31,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:31,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:05:31,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=700, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:05:31,394 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 28 states. [2020-10-14 05:05:32,153 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-14 05:05:32,511 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2020-10-14 05:05:32,933 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 78 [2020-10-14 05:05:33,438 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 90 [2020-10-14 05:05:33,703 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-14 05:05:34,056 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 104 [2020-10-14 05:05:35,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:35,432 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-14 05:05:35,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:05:35,433 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-14 05:05:35,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:35,434 INFO L225 Difference]: With dead ends: 94 [2020-10-14 05:05:35,434 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 05:05:35,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=185, Invalid=2467, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 05:05:35,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 05:05:35,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2020-10-14 05:05:35,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 05:05:35,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-14 05:05:35,447 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 63 [2020-10-14 05:05:35,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:35,448 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-14 05:05:35,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:05:35,448 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-14 05:05:35,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:05:35,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:35,449 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:35,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:05:35,449 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:35,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:35,450 INFO L82 PathProgramCache]: Analyzing trace with hash -432455707, now seen corresponding path program 28 times [2020-10-14 05:05:35,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:35,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460523774] [2020-10-14 05:05:35,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:35,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:36,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:36,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:05:36,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:36,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1246 [2020-10-14 05:05:36,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:36,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:36,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:05:36,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:36,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 05:05:36,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:37,302 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-14 05:05:37,569 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-14 05:05:37,805 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-10-14 05:05:37,986 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-14 05:05:38,225 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2020-10-14 05:05:38,390 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-14 05:05:38,722 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2020-10-14 05:05:38,917 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-10-14 05:05:39,098 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-14 05:05:39,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:39,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:39,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:39,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:39,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:39,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:39,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:39,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:39,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:39,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460523774] [2020-10-14 05:05:39,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:39,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 05:05:39,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709501234] [2020-10-14 05:05:39,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 05:05:39,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:39,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 05:05:39,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:05:39,999 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 29 states. [2020-10-14 05:05:40,813 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2020-10-14 05:05:41,221 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-14 05:05:41,662 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2020-10-14 05:05:41,875 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:05:42,224 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 102 [2020-10-14 05:05:42,610 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 107 [2020-10-14 05:05:43,027 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 111 [2020-10-14 05:05:44,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:44,252 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-14 05:05:44,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:05:44,253 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-14 05:05:44,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:44,254 INFO L225 Difference]: With dead ends: 117 [2020-10-14 05:05:44,254 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 05:05:44,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=204, Invalid=2346, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 05:05:44,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 05:05:44,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 77. [2020-10-14 05:05:44,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 05:05:44,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-10-14 05:05:44,267 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 64 [2020-10-14 05:05:44,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:44,268 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-10-14 05:05:44,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 05:05:44,268 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-10-14 05:05:44,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 05:05:44,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:44,269 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:44,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:05:44,269 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:44,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:44,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1793798142, now seen corresponding path program 29 times [2020-10-14 05:05:44,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:44,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011481272] [2020-10-14 05:05:44,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:44,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:45,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:45,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 05:05:45,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:45,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1203 [2020-10-14 05:05:45,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:45,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:05:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 05:05:45,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:46,053 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-14 05:05:46,303 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-14 05:05:46,644 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-14 05:05:46,779 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-14 05:05:47,021 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2020-10-14 05:05:47,180 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-14 05:05:47,355 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-14 05:05:48,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:48,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:48,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:48,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:48,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:48,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:48,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:48,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:48,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:48,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:48,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:48,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 8 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:48,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011481272] [2020-10-14 05:05:48,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:48,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:05:48,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853710622] [2020-10-14 05:05:48,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:05:48,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:48,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:05:48,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:05:48,373 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 28 states. [2020-10-14 05:05:48,896 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-14 05:05:49,280 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 05:05:49,715 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-14 05:05:49,927 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:05:50,248 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 98 [2020-10-14 05:05:51,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:51,293 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-10-14 05:05:51,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:05:51,294 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-10-14 05:05:51,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:51,295 INFO L225 Difference]: With dead ends: 107 [2020-10-14 05:05:51,295 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 05:05:51,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=141, Invalid=1839, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:05:51,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 05:05:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-10-14 05:05:51,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 05:05:51,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-14 05:05:51,308 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 66 [2020-10-14 05:05:51,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:51,309 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-14 05:05:51,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:05:51,309 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-14 05:05:51,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 05:05:51,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:51,309 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:51,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:05:51,310 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:51,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:51,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1618739057, now seen corresponding path program 30 times [2020-10-14 05:05:51,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:51,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344176687] [2020-10-14 05:05:51,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:51,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:53,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:53,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 05:05:53,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:53,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1676 [2020-10-14 05:05:53,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:53,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:53,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:05:53,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:53,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 05:05:53,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:53,857 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-14 05:05:54,233 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2020-10-14 05:05:54,388 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-14 05:05:54,625 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-10-14 05:05:54,788 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-14 05:05:55,061 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 93 [2020-10-14 05:05:55,487 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-14 05:05:56,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:56,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:56,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:56,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:56,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:56,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:56,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:56,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:56,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:56,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:56,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:56,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:56,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344176687] [2020-10-14 05:05:56,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:56,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:05:56,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334857271] [2020-10-14 05:05:56,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:05:56,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:56,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:05:56,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=801, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:05:56,338 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 30 states. [2020-10-14 05:05:57,164 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-14 05:05:57,591 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-14 05:05:57,792 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 05:05:58,066 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-14 05:05:58,288 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:05:58,599 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-10-14 05:05:58,842 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-14 05:05:59,257 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 116 [2020-10-14 05:06:00,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:00,457 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-14 05:06:00,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:06:00,457 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-14 05:06:00,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:00,459 INFO L225 Difference]: With dead ends: 98 [2020-10-14 05:06:00,459 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 05:06:00,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=200, Invalid=2662, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 05:06:00,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 05:06:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2020-10-14 05:06:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 05:06:00,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-14 05:06:00,471 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-10-14 05:06:00,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:00,471 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-14 05:06:00,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:06:00,472 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-14 05:06:00,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 05:06:00,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:00,472 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:00,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:06:00,473 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:00,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:00,473 INFO L82 PathProgramCache]: Analyzing trace with hash -291339764, now seen corresponding path program 31 times [2020-10-14 05:06:00,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:00,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915306627] [2020-10-14 05:06:00,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:00,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:02,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:02,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 05:06:02,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:02,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1997 [2020-10-14 05:06:02,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:02,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:02,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:06:02,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:02,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 05:06:02,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:03,330 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-14 05:06:03,501 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-14 05:06:03,826 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-10-14 05:06:03,984 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-14 05:06:04,227 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-10-14 05:06:04,405 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-10-14 05:06:04,689 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 90 [2020-10-14 05:06:04,878 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2020-10-14 05:06:05,147 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-10-14 05:06:05,414 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2020-10-14 05:06:05,667 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2020-10-14 05:06:05,859 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-10-14 05:06:06,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:06,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:06,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:06,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:06,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:06,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:06,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:06,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:06,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:06,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:06,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:06,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:06:06,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915306627] [2020-10-14 05:06:06,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:06,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:06:06,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304243171] [2020-10-14 05:06:06,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:06:06,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:06,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:06:06,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:06:06,831 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 31 states. [2020-10-14 05:06:07,750 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-14 05:06:08,061 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-14 05:06:08,478 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 93 [2020-10-14 05:06:08,727 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-14 05:06:09,005 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-14 05:06:09,237 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-10-14 05:06:09,639 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 116 [2020-10-14 05:06:10,252 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 128 [2020-10-14 05:06:10,888 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 132 [2020-10-14 05:06:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:11,907 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-14 05:06:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:06:11,907 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-14 05:06:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:11,908 INFO L225 Difference]: With dead ends: 99 [2020-10-14 05:06:11,909 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 05:06:11,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=203, Invalid=2347, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 05:06:11,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 05:06:11,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 76. [2020-10-14 05:06:11,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 05:06:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-14 05:06:11,922 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 68 [2020-10-14 05:06:11,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:11,922 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-14 05:06:11,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:06:11,922 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-14 05:06:11,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 05:06:11,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:11,923 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:11,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:06:11,923 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:11,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:11,923 INFO L82 PathProgramCache]: Analyzing trace with hash -32734107, now seen corresponding path program 32 times [2020-10-14 05:06:11,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:11,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934862103] [2020-10-14 05:06:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:12,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:13,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:13,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 05:06:13,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:13,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1587 [2020-10-14 05:06:13,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:13,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:13,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:06:13,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:13,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 05:06:13,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:14,624 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-14 05:06:14,882 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-14 05:06:15,267 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-10-14 05:06:15,766 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 101 [2020-10-14 05:06:16,464 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 118 [2020-10-14 05:06:17,199 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 145 [2020-10-14 05:06:18,770 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 179 DAG size of output: 158 [2020-10-14 05:06:20,336 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 272 DAG size of output: 212 [2020-10-14 05:06:22,733 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 223 DAG size of output: 172 [2020-10-14 05:06:22,971 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 70 [2020-10-14 05:06:24,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:24,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:24,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:24,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:24,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:24,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:24,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:24,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:24,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:24,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:24,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:24,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:06:24,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934862103] [2020-10-14 05:06:24,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:24,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:06:24,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465758385] [2020-10-14 05:06:24,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:06:24,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:24,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:06:24,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:06:24,143 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 31 states. [2020-10-14 05:06:24,883 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-10-14 05:06:25,408 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-14 05:06:25,727 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-14 05:06:26,697 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 111 [2020-10-14 05:06:27,279 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-10-14 05:06:29,430 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 208 DAG size of output: 149 [2020-10-14 05:06:30,420 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 146 [2020-10-14 05:06:36,775 WARN L193 SmtUtils]: Spent 6.09 s on a formula simplification. DAG size of input: 292 DAG size of output: 207 [2020-10-14 05:06:38,672 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 215 DAG size of output: 213 [2020-10-14 05:06:52,292 WARN L193 SmtUtils]: Spent 13.14 s on a formula simplification. DAG size of input: 377 DAG size of output: 317 [2020-10-14 05:06:55,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:55,067 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-10-14 05:06:55,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 05:06:55,069 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-14 05:06:55,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:55,070 INFO L225 Difference]: With dead ends: 104 [2020-10-14 05:06:55,070 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 05:06:55,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=200, Invalid=2880, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 05:06:55,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 05:06:55,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 79. [2020-10-14 05:06:55,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 05:06:55,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-14 05:06:55,090 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 70 [2020-10-14 05:06:55,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:55,091 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-14 05:06:55,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:06:55,091 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-14 05:06:55,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 05:06:55,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:55,092 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:55,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:06:55,092 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:55,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:55,092 INFO L82 PathProgramCache]: Analyzing trace with hash 830814186, now seen corresponding path program 33 times [2020-10-14 05:06:55,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:55,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089470093] [2020-10-14 05:06:55,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:55,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:57,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:57,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 05:06:57,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:57,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1995 [2020-10-14 05:06:57,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:57,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:57,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 05:06:57,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:57,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-14 05:06:57,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:57,704 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-14 05:06:57,904 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-14 05:06:58,175 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-14 05:06:58,501 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-14 05:06:58,936 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-10-14 05:06:59,232 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-10-14 05:06:59,621 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2020-10-14 05:07:00,025 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-14 05:07:00,374 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2020-10-14 05:07:00,795 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2020-10-14 05:07:01,087 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-10-14 05:07:01,307 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-14 05:07:01,529 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-14 05:07:01,743 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-14 05:07:01,960 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-14 05:07:02,165 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-14 05:07:02,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:07:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:02,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:02,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:02,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:07:02,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:07:02,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:07:02,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:02,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:02,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:07:02,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:07:02,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:07:02,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:07:02,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089470093] [2020-10-14 05:07:02,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:07:02,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 05:07:02,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136939539] [2020-10-14 05:07:02,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 05:07:02,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:07:02,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 05:07:02,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:07:02,888 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 32 states. [2020-10-14 05:07:03,878 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-14 05:07:04,412 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-14 05:07:04,662 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-14 05:07:05,143 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-14 05:07:05,415 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 05:07:05,830 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-14 05:07:06,132 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:07:06,585 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2020-10-14 05:07:06,911 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-14 05:07:07,482 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 116 [2020-10-14 05:07:08,079 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 112 [2020-10-14 05:07:08,749 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 116 [2020-10-14 05:07:09,662 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:07:10,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:07:10,823 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2020-10-14 05:07:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 05:07:10,824 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-14 05:07:10,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:07:10,825 INFO L225 Difference]: With dead ends: 130 [2020-10-14 05:07:10,825 INFO L226 Difference]: Without dead ends: 128 [2020-10-14 05:07:10,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=240, Invalid=3182, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 05:07:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-14 05:07:10,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 84. [2020-10-14 05:07:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-14 05:07:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2020-10-14 05:07:10,843 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 71 [2020-10-14 05:07:10,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:07:10,844 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2020-10-14 05:07:10,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 05:07:10,844 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2020-10-14 05:07:10,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 05:07:10,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:07:10,844 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:07:10,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:07:10,845 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:07:10,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:07:10,845 INFO L82 PathProgramCache]: Analyzing trace with hash -219387151, now seen corresponding path program 34 times [2020-10-14 05:07:10,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:07:10,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182715444] [2020-10-14 05:07:10,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:07:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:11,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:12,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:12,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 05:07:12,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:07:12,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1671 [2020-10-14 05:07:12,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:12,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:12,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:07:12,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:07:12,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 05:07:12,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:13,153 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-14 05:07:13,451 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-14 05:07:13,794 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-14 05:07:14,043 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-14 05:07:14,430 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2020-10-14 05:07:14,654 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-14 05:07:14,992 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 92 [2020-10-14 05:07:15,259 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-10-14 05:07:15,571 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-10-14 05:07:15,817 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-10-14 05:07:17,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:07:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:17,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:17,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:17,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:07:17,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:07:17,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:07:17,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:17,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:17,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:07:17,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:07:17,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:07:17,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 9 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:07:17,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182715444] [2020-10-14 05:07:17,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:07:17,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:07:17,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349183369] [2020-10-14 05:07:17,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:07:17,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:07:17,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:07:17,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:07:17,356 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 31 states. [2020-10-14 05:07:18,314 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 73 [2020-10-14 05:07:18,604 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 05:07:18,975 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-14 05:07:19,271 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:07:19,700 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-14 05:07:20,017 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-14 05:07:20,563 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 112 [2020-10-14 05:07:22,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:07:22,295 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-14 05:07:22,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:07:22,296 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 73 [2020-10-14 05:07:22,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:07:22,297 INFO L225 Difference]: With dead ends: 117 [2020-10-14 05:07:22,297 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 05:07:22,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=154, Invalid=2198, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 05:07:22,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 05:07:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2020-10-14 05:07:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-14 05:07:22,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-14 05:07:22,316 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-10-14 05:07:22,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:07:22,316 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-14 05:07:22,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:07:22,316 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-14 05:07:22,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 05:07:22,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:07:22,317 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:07:22,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:07:22,317 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:07:22,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:07:22,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1106293428, now seen corresponding path program 35 times [2020-10-14 05:07:22,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:07:22,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701932222] [2020-10-14 05:07:22,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:07:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:22,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:24,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:24,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 05:07:24,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:07:24,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2126 [2020-10-14 05:07:24,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:24,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:24,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 05:07:24,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:07:24,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 05:07:24,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:25,235 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-14 05:07:25,616 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-14 05:07:25,949 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-10-14 05:07:26,187 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-14 05:07:26,733 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-10-14 05:07:26,968 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-14 05:07:27,357 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-10-14 05:07:27,680 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2020-10-14 05:07:28,170 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 102 [2020-10-14 05:07:28,379 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-14 05:07:28,632 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-14 05:07:29,127 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 76 [2020-10-14 05:07:29,325 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-14 05:07:29,544 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-14 05:07:29,760 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-14 05:07:30,158 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-14 05:07:30,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:07:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:30,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:30,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:30,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:07:30,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:07:30,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:07:30,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:30,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:30,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:07:30,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:07:30,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:07:30,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:07:31,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701932222] [2020-10-14 05:07:31,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:07:31,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 05:07:31,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966528853] [2020-10-14 05:07:31,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 05:07:31,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:07:31,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 05:07:31,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:07:31,045 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 33 states. [2020-10-14 05:07:31,773 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-14 05:07:32,161 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-14 05:07:32,620 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-14 05:07:33,183 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 80 [2020-10-14 05:07:33,520 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-14 05:07:34,029 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 97 [2020-10-14 05:07:34,426 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-14 05:07:35,006 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 109 [2020-10-14 05:07:35,436 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-14 05:07:36,122 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 123 [2020-10-14 05:07:36,610 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2020-10-14 05:07:37,305 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 128 [2020-10-14 05:07:37,930 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-14 05:07:39,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:07:39,819 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-14 05:07:39,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:07:39,820 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-14 05:07:39,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:07:39,822 INFO L225 Difference]: With dead ends: 108 [2020-10-14 05:07:39,822 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 05:07:39,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=220, Invalid=3086, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 05:07:39,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 05:07:39,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2020-10-14 05:07:39,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 05:07:39,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-14 05:07:39,839 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 74 [2020-10-14 05:07:39,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:07:39,840 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-14 05:07:39,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 05:07:39,840 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-14 05:07:39,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 05:07:39,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:07:39,841 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:07:39,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:07:39,841 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:07:39,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:07:39,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1910213603, now seen corresponding path program 36 times [2020-10-14 05:07:39,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:07:39,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669794691] [2020-10-14 05:07:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:07:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:40,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:42,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:42,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 05:07:42,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:07:42,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2513 [2020-10-14 05:07:42,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:42,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:42,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:07:42,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:07:42,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 05:07:42,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:43,293 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-14 05:07:43,620 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-14 05:07:44,010 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-14 05:07:44,709 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2020-10-14 05:07:44,960 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-14 05:07:45,591 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 93 [2020-10-14 05:07:45,916 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2020-10-14 05:07:46,417 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 100 [2020-10-14 05:07:46,608 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-14 05:07:46,882 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-14 05:07:47,075 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-14 05:07:47,306 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-14 05:07:47,559 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-14 05:07:47,781 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-14 05:07:47,983 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-14 05:07:48,407 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-14 05:07:48,618 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-10-14 05:07:49,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:07:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:49,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:49,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:49,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:07:49,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:07:49,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:07:49,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:49,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:49,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:07:49,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:07:49,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:07:49,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:07:49,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669794691] [2020-10-14 05:07:49,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:07:49,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 05:07:49,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736919524] [2020-10-14 05:07:49,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 05:07:49,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:07:49,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 05:07:49,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:07:49,453 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 34 states. [2020-10-14 05:07:50,086 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-10-14 05:07:50,574 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-14 05:07:51,164 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-14 05:07:51,445 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-14 05:07:51,855 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-14 05:07:52,171 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 05:07:52,636 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-14 05:07:52,967 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:07:53,490 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97