/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=0.6 --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 language data_model -i ../../../trunk/examples/svcomp/heap-data/calendar.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:33:35,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:33:35,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:33:35,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:33:35,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:33:35,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:33:35,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:33:35,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:33:35,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:33:35,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:33:35,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:33:35,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:33:35,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:33:35,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:33:35,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:33:35,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:33:35,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:33:35,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:33:35,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:33:35,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:33:35,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:33:35,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:33:35,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:33:35,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:33:35,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:33:35,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:33:35,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:33:35,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:33:35,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:33:35,365 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:33:35,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:33:35,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:33:35,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:33:35,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:33:35,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:33:35,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:33:35,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:33:35,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:33:35,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:33:35,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:33:35,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:33:35,375 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 [2020-10-28 14:33:35,404 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:33:35,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:33:35,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:33:35,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:33:35,407 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:33:35,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:33:35,407 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:33:35,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:33:35,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:33:35,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:33:35,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:33:35,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:33:35,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:33:35,409 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:33:35,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:33:35,409 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:33:35,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:33:35,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:33:35,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:33:35,413 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:33:35,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:33:35,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:33:35,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:33:35,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:33:35,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:33:35,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:33:35,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:33:35,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:33:35,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:33:35,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:33:35,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:33:35,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:33:35,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:33:35,918 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:33:35,919 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:33:35,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/calendar.i [2020-10-28 14:33:36,015 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8549def62/6a58e647bc9e4797bad053212a6b86c3/FLAG72580530c [2020-10-28 14:33:36,886 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:33:36,888 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-data/calendar.i [2020-10-28 14:33:36,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8549def62/6a58e647bc9e4797bad053212a6b86c3/FLAG72580530c [2020-10-28 14:33:37,105 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8549def62/6a58e647bc9e4797bad053212a6b86c3 [2020-10-28 14:33:37,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:33:37,117 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:33:37,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:33:37,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:33:37,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:33:37,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:33:37" (1/1) ... [2020-10-28 14:33:37,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d90d554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:37, skipping insertion in model container [2020-10-28 14:33:37,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:33:37" (1/1) ... [2020-10-28 14:33:37,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:33:37,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:33:37,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:33:37,580 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:33:37,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:33:37,742 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:33:37,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:37 WrapperNode [2020-10-28 14:33:37,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:33:37,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:33:37,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:33:37,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:33:37,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:37" (1/1) ... [2020-10-28 14:33:37,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:37" (1/1) ... [2020-10-28 14:33:37,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:37" (1/1) ... [2020-10-28 14:33:37,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:37" (1/1) ... [2020-10-28 14:33:37,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:37" (1/1) ... [2020-10-28 14:33:37,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:37" (1/1) ... [2020-10-28 14:33:37,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:37" (1/1) ... [2020-10-28 14:33:37,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:33:37,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:33:37,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:33:37,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:33:37,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:37" (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 [2020-10-28 14:33:37,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:33:37,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:33:37,896 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:33:37,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-28 14:33:37,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-28 14:33:37,897 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:33:37,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:33:37,898 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:33:37,898 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:33:37,899 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:33:37,901 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:33:37,901 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:33:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:33:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-28 14:33:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-28 14:33:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:33:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:33:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:33:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:33:37,904 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:33:37,904 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:33:37,904 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:33:37,905 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:33:37,905 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:33:37,905 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:33:37,905 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:33:37,910 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:33:37,910 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:33:37,910 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:33:37,910 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:33:37,910 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:33:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:33:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:33:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:33:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:33:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:33:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:33:37,912 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:33:37,912 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:33:37,912 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:33:37,912 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:33:37,912 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:33:37,912 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:33:37,912 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:33:37,913 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:33:37,913 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:33:37,913 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:33:37,913 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:33:37,913 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:33:37,913 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:33:37,913 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:33:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:33:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:33:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:33:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:33:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:33:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:33:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:33:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:33:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:33:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:33:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:33:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:33:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:33:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:33:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:33:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:33:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:33:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:33:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:33:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:33:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:33:37,920 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:33:37,920 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:33:37,920 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:33:37,920 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:33:37,921 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:33:37,921 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:33:37,921 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:33:37,921 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:33:37,921 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:33:37,921 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:33:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:33:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:33:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:33:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:33:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:33:37,923 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:33:37,923 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:33:37,923 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:33:37,923 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:33:37,923 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:33:37,923 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:33:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:33:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:33:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:33:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:33:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:33:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:33:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:33:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:33:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:33:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:33:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:33:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:33:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:33:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:33:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:33:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:33:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:33:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:33:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:33:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:33:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:33:37,926 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:33:37,926 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:33:37,926 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:33:37,926 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:33:37,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:33:37,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:33:37,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:33:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:33:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:33:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:33:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:33:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:33:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:33:38,530 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:33:38,530 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 14:33:38,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:33:38 BoogieIcfgContainer [2020-10-28 14:33:38,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:33:38,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:33:38,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:33:38,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:33:38,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:33:37" (1/3) ... [2020-10-28 14:33:38,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40361a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:33:38, skipping insertion in model container [2020-10-28 14:33:38,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:37" (2/3) ... [2020-10-28 14:33:38,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40361a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:33:38, skipping insertion in model container [2020-10-28 14:33:38,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:33:38" (3/3) ... [2020-10-28 14:33:38,542 INFO L111 eAbstractionObserver]: Analyzing ICFG calendar.i [2020-10-28 14:33:38,553 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:33:38,559 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:33:38,573 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:33:38,603 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:33:38,603 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:33:38,604 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:33:38,604 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:33:38,604 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:33:38,604 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:33:38,604 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:33:38,604 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:33:38,623 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-28 14:33:38,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:33:38,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:38,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:38,631 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:38,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:38,638 INFO L82 PathProgramCache]: Analyzing trace with hash -909177362, now seen corresponding path program 1 times [2020-10-28 14:33:38,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:38,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69238910] [2020-10-28 14:33:38,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:38,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:38,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:39,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:39,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:33:39,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:39,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-28 14:33:39,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:39,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:39,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:39,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:33:39,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:39,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 14:33:39,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:39,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:39,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:39,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:39,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:39,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:33:39,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:39,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:39,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:39,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:39,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:39,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:39,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69238910] [2020-10-28 14:33:39,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:39,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:33:39,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257786961] [2020-10-28 14:33:39,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:33:39,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:39,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:33:39,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:33:39,284 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-10-28 14:33:39,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:39,406 INFO L93 Difference]: Finished difference Result 64 states and 92 transitions. [2020-10-28 14:33:39,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:33:39,408 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-28 14:33:39,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:39,418 INFO L225 Difference]: With dead ends: 64 [2020-10-28 14:33:39,418 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 14:33:39,422 INFO L677 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 [2020-10-28 14:33:39,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 14:33:39,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2020-10-28 14:33:39,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 14:33:39,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-10-28 14:33:39,467 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 16 [2020-10-28 14:33:39,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:39,468 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-28 14:33:39,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:33:39,468 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2020-10-28 14:33:39,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:33:39,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:39,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:39,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:33:39,470 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:39,471 INFO L82 PathProgramCache]: Analyzing trace with hash -969022051, now seen corresponding path program 1 times [2020-10-28 14:33:39,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:39,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483803304] [2020-10-28 14:33:39,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:39,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:39,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:39,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:33:39,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:39,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-28 14:33:39,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:39,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:39,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:33:39,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:39,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:33:39,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:39,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:39,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:39,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:39,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:39,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:39,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:33:39,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:39,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:39,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:39,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:39,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:39,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:39,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483803304] [2020-10-28 14:33:39,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:39,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:33:39,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879636995] [2020-10-28 14:33:39,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:33:39,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:39,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:33:39,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:33:39,716 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 5 states. [2020-10-28 14:33:39,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:39,921 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2020-10-28 14:33:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:33:39,922 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-28 14:33:39,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:39,923 INFO L225 Difference]: With dead ends: 43 [2020-10-28 14:33:39,923 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 14:33:39,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:33:39,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 14:33:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 14:33:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 14:33:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-10-28 14:33:39,932 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 18 [2020-10-28 14:33:39,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:39,933 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-10-28 14:33:39,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:33:39,933 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-10-28 14:33:39,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:33:39,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:39,934 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:39,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:33:39,935 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:39,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:39,936 INFO L82 PathProgramCache]: Analyzing trace with hash 99493644, now seen corresponding path program 1 times [2020-10-28 14:33:39,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:39,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709501590] [2020-10-28 14:33:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:39,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:40,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:40,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:40,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:33:40,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:40,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 676 [2020-10-28 14:33:40,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:40,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:40,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:33:40,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:33:40,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:33:40,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:40,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:40,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:40,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:40,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:40,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:40,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:33:40,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:40,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:40,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:40,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:40,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:40,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:40,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709501590] [2020-10-28 14:33:40,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:40,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 14:33:40,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545262971] [2020-10-28 14:33:40,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:33:40,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:40,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:33:40,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:33:40,819 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 8 states. [2020-10-28 14:33:41,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:41,194 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-10-28 14:33:41,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:33:41,196 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-28 14:33:41,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:41,197 INFO L225 Difference]: With dead ends: 55 [2020-10-28 14:33:41,198 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 14:33:41,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:33:41,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 14:33:41,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-10-28 14:33:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 14:33:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-10-28 14:33:41,219 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 23 [2020-10-28 14:33:41,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:41,221 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-10-28 14:33:41,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:33:41,221 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-10-28 14:33:41,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:33:41,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:41,223 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:41,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:33:41,223 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:41,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:41,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1640416206, now seen corresponding path program 1 times [2020-10-28 14:33:41,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:41,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300521098] [2020-10-28 14:33:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:41,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:41,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:41,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:41,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:33:41,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:41,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-28 14:33:41,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:41,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:41,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:33:41,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:33:41,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:33:41,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:41,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:41,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:41,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:41,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:41,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:41,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:33:41,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:41,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:41,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:41,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:41,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:41,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:41,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300521098] [2020-10-28 14:33:41,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:41,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 14:33:41,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202026067] [2020-10-28 14:33:41,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:33:41,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:41,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:33:41,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:33:41,980 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 8 states. [2020-10-28 14:33:42,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:42,363 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2020-10-28 14:33:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:33:42,364 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-28 14:33:42,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:42,365 INFO L225 Difference]: With dead ends: 45 [2020-10-28 14:33:42,365 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 14:33:42,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:33:42,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 14:33:42,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-28 14:33:42,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 14:33:42,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-10-28 14:33:42,383 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 25 [2020-10-28 14:33:42,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:42,384 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-10-28 14:33:42,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:33:42,384 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-10-28 14:33:42,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:33:42,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:42,388 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:42,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:33:42,389 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:42,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:42,389 INFO L82 PathProgramCache]: Analyzing trace with hash 749596250, now seen corresponding path program 1 times [2020-10-28 14:33:42,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:42,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26115292] [2020-10-28 14:33:42,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:42,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:42,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:42,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:42,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:33:42,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:42,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 514 [2020-10-28 14:33:42,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:42,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:42,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:33:42,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:42,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:33:42,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:43,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:43,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:43,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:43,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:43,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:43,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:33:43,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:43,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:43,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:43,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:43,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:43,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 16 [2020-10-28 14:33:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:43,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26115292] [2020-10-28 14:33:43,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:43,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:33:43,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432162443] [2020-10-28 14:33:43,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:33:43,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:43,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:33:43,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:33:43,091 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 7 states. [2020-10-28 14:33:43,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:43,352 INFO L93 Difference]: Finished difference Result 69 states and 87 transitions. [2020-10-28 14:33:43,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:33:43,353 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-28 14:33:43,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:43,354 INFO L225 Difference]: With dead ends: 69 [2020-10-28 14:33:43,354 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 14:33:43,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:33:43,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 14:33:43,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-28 14:33:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 14:33:43,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-10-28 14:33:43,362 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 31 [2020-10-28 14:33:43,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:43,363 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-10-28 14:33:43,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:33:43,363 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-10-28 14:33:43,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:33:43,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:43,364 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:43,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:33:43,365 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:43,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:43,366 INFO L82 PathProgramCache]: Analyzing trace with hash 710523211, now seen corresponding path program 2 times [2020-10-28 14:33:43,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:43,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525910370] [2020-10-28 14:33:43,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:43,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:43,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:43,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:45,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:45,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:33:45,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:45,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1640 [2020-10-28 14:33:45,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:45,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:45,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:33:45,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 14:33:45,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:33:45,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:45,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:45,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:45,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:45,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:45,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:45,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:33:45,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:45,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:45,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:45,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:45,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:45,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:45,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 14:33:45,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525910370] [2020-10-28 14:33:45,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:45,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:33:45,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863593330] [2020-10-28 14:33:45,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:33:45,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:45,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:33:45,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:33:45,151 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 6 states. [2020-10-28 14:33:45,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:45,313 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2020-10-28 14:33:45,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:33:45,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-28 14:33:45,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:45,315 INFO L225 Difference]: With dead ends: 70 [2020-10-28 14:33:45,315 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 14:33:45,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:33:45,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 14:33:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-28 14:33:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 14:33:45,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2020-10-28 14:33:45,330 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 36 [2020-10-28 14:33:45,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:45,331 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2020-10-28 14:33:45,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:33:45,331 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2020-10-28 14:33:45,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:33:45,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:45,335 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:45,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:33:45,335 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:45,336 INFO L82 PathProgramCache]: Analyzing trace with hash 968688649, now seen corresponding path program 1 times [2020-10-28 14:33:45,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:45,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895997025] [2020-10-28 14:33:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:45,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:45,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:45,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:45,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:33:45,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:45,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 568 [2020-10-28 14:33:45,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:45,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:45,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:33:45,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:33:45,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:33:45,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:46,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:46,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:46,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:46,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:46,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:46,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:46,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:46,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:46,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:46,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:46,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:46,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:46,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895997025] [2020-10-28 14:33:46,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:46,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:33:46,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945553195] [2020-10-28 14:33:46,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:33:46,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:46,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:33:46,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:33:46,106 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 10 states. [2020-10-28 14:33:46,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:46,827 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2020-10-28 14:33:46,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:33:46,828 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-28 14:33:46,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:46,830 INFO L225 Difference]: With dead ends: 84 [2020-10-28 14:33:46,830 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 14:33:46,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:33:46,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 14:33:46,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2020-10-28 14:33:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 14:33:46,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2020-10-28 14:33:46,840 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 36 [2020-10-28 14:33:46,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:46,841 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2020-10-28 14:33:46,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:33:46,841 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2020-10-28 14:33:46,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:33:46,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:46,842 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:46,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:33:46,843 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:46,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:46,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1112386545, now seen corresponding path program 1 times [2020-10-28 14:33:46,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:46,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873640467] [2020-10-28 14:33:46,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:46,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:47,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:47,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:33:47,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:47,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-28 14:33:47,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:47,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:47,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:33:47,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:33:47,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:33:47,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:47,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:47,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:47,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:47,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:47,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:47,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:47,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:47,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:47,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:47,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:47,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:47,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:47,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873640467] [2020-10-28 14:33:47,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:47,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:33:47,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981417978] [2020-10-28 14:33:47,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:33:47,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:47,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:33:47,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:33:47,352 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand 10 states. [2020-10-28 14:33:48,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:48,128 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2020-10-28 14:33:48,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:33:48,129 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-28 14:33:48,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:48,130 INFO L225 Difference]: With dead ends: 67 [2020-10-28 14:33:48,130 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 14:33:48,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:33:48,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 14:33:48,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-10-28 14:33:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 14:33:48,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-10-28 14:33:48,141 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 38 [2020-10-28 14:33:48,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:48,141 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-10-28 14:33:48,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:33:48,141 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-10-28 14:33:48,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:33:48,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:48,143 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:48,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:33:48,143 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:48,144 INFO L82 PathProgramCache]: Analyzing trace with hash 417712405, now seen corresponding path program 2 times [2020-10-28 14:33:48,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:48,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674817086] [2020-10-28 14:33:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:48,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:48,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:48,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:33:48,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:48,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-28 14:33:48,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:48,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:33:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:33:48,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:48,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:48,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:48,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:48,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:48,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:48,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:33:48,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:48,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:48,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:48,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:48,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:48,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:48,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674817086] [2020-10-28 14:33:48,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:48,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:33:48,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302046754] [2020-10-28 14:33:48,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:33:48,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:48,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:33:48,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:33:48,618 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 9 states. [2020-10-28 14:33:49,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:49,157 INFO L93 Difference]: Finished difference Result 103 states and 127 transitions. [2020-10-28 14:33:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:33:49,158 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-28 14:33:49,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:49,159 INFO L225 Difference]: With dead ends: 103 [2020-10-28 14:33:49,159 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 14:33:49,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:33:49,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 14:33:49,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-28 14:33:49,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 14:33:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2020-10-28 14:33:49,169 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 44 [2020-10-28 14:33:49,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:49,169 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2020-10-28 14:33:49,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:33:49,169 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2020-10-28 14:33:49,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:33:49,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:49,171 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:49,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:33:49,171 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:49,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1946350140, now seen corresponding path program 3 times [2020-10-28 14:33:49,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:49,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020068068] [2020-10-28 14:33:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:49,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:49,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:50,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:50,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:33:50,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:50,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1151 [2020-10-28 14:33:50,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:50,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:50,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:33:50,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:33:50,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:33:50,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:50,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:50,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:50,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:50,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:50,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:50,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:50,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:50,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:50,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:50,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:50,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:50,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:50,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020068068] [2020-10-28 14:33:50,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:50,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:33:50,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119443648] [2020-10-28 14:33:50,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:33:50,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:50,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:33:50,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:33:50,685 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand 12 states. [2020-10-28 14:33:52,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:52,678 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2020-10-28 14:33:52,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:33:52,680 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-28 14:33:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:52,682 INFO L225 Difference]: With dead ends: 100 [2020-10-28 14:33:52,684 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 14:33:52,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:33:52,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 14:33:52,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 70. [2020-10-28 14:33:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 14:33:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2020-10-28 14:33:52,706 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 49 [2020-10-28 14:33:52,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:52,706 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2020-10-28 14:33:52,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:33:52,706 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2020-10-28 14:33:52,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:33:52,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:52,709 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:52,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:33:52,710 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:52,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:52,710 INFO L82 PathProgramCache]: Analyzing trace with hash 78787308, now seen corresponding path program 2 times [2020-10-28 14:33:52,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:52,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787347005] [2020-10-28 14:33:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:52,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:53,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:53,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:33:53,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:53,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-10-28 14:33:53,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:53,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:53,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:33:53,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:33:53,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:33:53,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:53,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:53,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:53,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:53,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:53,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:53,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:53,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:53,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:53,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:53,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:53,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:53,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:53,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787347005] [2020-10-28 14:33:53,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:53,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:33:53,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421121862] [2020-10-28 14:33:53,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:33:53,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:53,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:33:53,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:33:53,605 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand 12 states. [2020-10-28 14:33:55,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:55,058 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2020-10-28 14:33:55,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:33:55,059 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-28 14:33:55,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:55,060 INFO L225 Difference]: With dead ends: 83 [2020-10-28 14:33:55,060 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 14:33:55,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:33:55,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 14:33:55,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2020-10-28 14:33:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 14:33:55,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2020-10-28 14:33:55,081 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 51 [2020-10-28 14:33:55,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:55,081 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2020-10-28 14:33:55,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:33:55,081 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2020-10-28 14:33:55,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 14:33:55,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:55,083 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:55,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:33:55,083 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:55,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:55,087 INFO L82 PathProgramCache]: Analyzing trace with hash -519444528, now seen corresponding path program 4 times [2020-10-28 14:33:55,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:55,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053392306] [2020-10-28 14:33:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:55,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:55,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:55,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 14:33:55,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:55,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 474 [2020-10-28 14:33:55,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:55,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:55,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:33:55,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:55,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 14:33:55,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:33:55,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:55,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:55,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:55,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:55,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:55,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:55,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:55,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:55,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:55,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:55,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:55,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:55,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053392306] [2020-10-28 14:33:55,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:55,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:33:55,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551406518] [2020-10-28 14:33:55,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:33:55,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:55,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:33:55,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:33:55,859 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand 11 states. [2020-10-28 14:33:56,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:56,497 INFO L93 Difference]: Finished difference Result 130 states and 160 transitions. [2020-10-28 14:33:56,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:33:56,497 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-28 14:33:56,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:56,498 INFO L225 Difference]: With dead ends: 130 [2020-10-28 14:33:56,499 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 14:33:56,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:33:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 14:33:56,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-28 14:33:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 14:33:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2020-10-28 14:33:56,515 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 57 [2020-10-28 14:33:56,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:56,517 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2020-10-28 14:33:56,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:33:56,517 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2020-10-28 14:33:56,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 14:33:56,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:56,518 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:56,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:33:56,519 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:56,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:56,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1149372543, now seen corresponding path program 5 times [2020-10-28 14:33:56,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:56,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764519860] [2020-10-28 14:33:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:56,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:57,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:57,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:57,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 14:33:57,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:57,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1266 [2020-10-28 14:33:57,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:57,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:57,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:33:57,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:33:57,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 14:33:57,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:58,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:58,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:58,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:58,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:58,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:58,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:58,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:58,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:58,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:58,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:58,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:58,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 18 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:58,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764519860] [2020-10-28 14:33:58,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:58,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:33:58,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608025644] [2020-10-28 14:33:58,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:33:58,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:58,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:33:58,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:33:58,346 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand 14 states. [2020-10-28 14:33:58,993 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-28 14:33:59,252 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-28 14:33:59,527 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-28 14:33:59,778 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-28 14:34:00,016 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-28 14:34:00,223 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-28 14:34:00,425 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-28 14:34:00,631 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-28 14:34:00,816 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 14:34:01,006 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-28 14:34:01,190 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 14:34:01,383 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-28 14:34:01,696 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-28 14:34:01,866 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-28 14:34:02,035 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-28 14:34:02,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:02,481 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-10-28 14:34:02,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:34:02,482 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-28 14:34:02,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:02,484 INFO L225 Difference]: With dead ends: 116 [2020-10-28 14:34:02,484 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 14:34:02,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:34:02,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 14:34:02,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2020-10-28 14:34:02,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 14:34:02,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2020-10-28 14:34:02,496 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 62 [2020-10-28 14:34:02,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:02,497 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2020-10-28 14:34:02,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:34:02,497 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2020-10-28 14:34:02,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 14:34:02,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:02,498 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:02,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:34:02,498 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:02,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:02,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1470079337, now seen corresponding path program 3 times [2020-10-28 14:34:02,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:02,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538316305] [2020-10-28 14:34:02,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:02,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:03,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:03,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 14:34:03,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:03,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 773 [2020-10-28 14:34:03,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:03,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:03,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:34:03,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:34:03,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 14:34:03,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:03,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:03,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:03,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:03,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:03,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:03,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:03,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:03,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:03,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:03,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:03,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:03,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:03,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:03,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538316305] [2020-10-28 14:34:03,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:03,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:34:03,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509399844] [2020-10-28 14:34:03,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:34:03,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:03,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:34:03,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:34:03,755 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand 14 states. [2020-10-28 14:34:04,782 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 14:34:05,009 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-28 14:34:05,166 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-28 14:34:05,330 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-28 14:34:06,004 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-28 14:34:06,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:06,550 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2020-10-28 14:34:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:34:06,551 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 64 [2020-10-28 14:34:06,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:06,552 INFO L225 Difference]: With dead ends: 99 [2020-10-28 14:34:06,552 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 14:34:06,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:34:06,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 14:34:06,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-10-28 14:34:06,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 14:34:06,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2020-10-28 14:34:06,566 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 64 [2020-10-28 14:34:06,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:06,567 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2020-10-28 14:34:06,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:34:06,567 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2020-10-28 14:34:06,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 14:34:06,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:06,568 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:06,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:34:06,568 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:06,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:06,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1343734925, now seen corresponding path program 6 times [2020-10-28 14:34:06,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:06,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125738992] [2020-10-28 14:34:06,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:06,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:07,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:07,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 14:34:07,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:07,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 678 [2020-10-28 14:34:07,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:07,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:07,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:34:07,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:07,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 14:34:07,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:07,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:07,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:07,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:07,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:07,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:07,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:34:07,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:07,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:07,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:07,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:07,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:07,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 16 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:07,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125738992] [2020-10-28 14:34:07,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:07,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:34:07,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815226967] [2020-10-28 14:34:07,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:34:07,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:07,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:34:07,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:34:07,728 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand 13 states. [2020-10-28 14:34:08,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:08,763 INFO L93 Difference]: Finished difference Result 157 states and 193 transitions. [2020-10-28 14:34:08,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:34:08,764 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 70 [2020-10-28 14:34:08,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:08,765 INFO L225 Difference]: With dead ends: 157 [2020-10-28 14:34:08,765 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 14:34:08,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:34:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 14:34:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-28 14:34:08,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 14:34:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2020-10-28 14:34:08,782 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 70 [2020-10-28 14:34:08,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:08,782 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2020-10-28 14:34:08,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:34:08,782 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2020-10-28 14:34:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 14:34:08,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:08,790 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:08,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:34:08,790 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:08,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:08,790 INFO L82 PathProgramCache]: Analyzing trace with hash 994868348, now seen corresponding path program 7 times [2020-10-28 14:34:08,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:08,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799460297] [2020-10-28 14:34:08,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:08,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:09,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:10,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:10,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 14:34:10,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:10,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1576 [2020-10-28 14:34:10,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:10,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:10,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:34:10,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:34:10,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 14:34:10,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:11,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:11,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:11,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:11,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:11,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:11,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:11,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:11,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:11,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:11,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:11,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:11,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 23 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:11,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799460297] [2020-10-28 14:34:11,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:11,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:34:11,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144813097] [2020-10-28 14:34:11,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:34:11,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:11,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:34:11,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:34:11,153 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand 16 states. [2020-10-28 14:34:11,872 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-10-28 14:34:12,203 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-28 14:34:12,770 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 145 [2020-10-28 14:34:13,370 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 148 [2020-10-28 14:34:14,008 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 147 [2020-10-28 14:34:14,614 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 149 [2020-10-28 14:34:15,140 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 132 [2020-10-28 14:34:15,673 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 135 [2020-10-28 14:34:16,198 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 134 [2020-10-28 14:34:16,759 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 136 [2020-10-28 14:34:17,170 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 119 [2020-10-28 14:34:17,634 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 122 [2020-10-28 14:34:18,080 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 121 [2020-10-28 14:34:18,554 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 123 [2020-10-28 14:34:18,959 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 106 [2020-10-28 14:34:19,391 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 109 [2020-10-28 14:34:19,825 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 108 [2020-10-28 14:34:20,179 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 110 [2020-10-28 14:34:20,490 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 93 [2020-10-28 14:34:20,878 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2020-10-28 14:34:21,253 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 95 [2020-10-28 14:34:21,645 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2020-10-28 14:34:22,077 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-28 14:34:22,448 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-10-28 14:34:22,793 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-28 14:34:22,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:22,820 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2020-10-28 14:34:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 14:34:22,820 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-10-28 14:34:22,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:22,821 INFO L225 Difference]: With dead ends: 132 [2020-10-28 14:34:22,822 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 14:34:22,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=559, Invalid=1247, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:34:22,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 14:34:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 102. [2020-10-28 14:34:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 14:34:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 127 transitions. [2020-10-28 14:34:22,834 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 127 transitions. Word has length 75 [2020-10-28 14:34:22,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:22,835 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 127 transitions. [2020-10-28 14:34:22,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:34:22,835 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 127 transitions. [2020-10-28 14:34:22,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 14:34:22,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:22,836 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:22,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:34:22,836 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:22,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:22,837 INFO L82 PathProgramCache]: Analyzing trace with hash 501273508, now seen corresponding path program 4 times [2020-10-28 14:34:22,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:22,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778569992] [2020-10-28 14:34:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:22,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:24,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:24,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 14:34:24,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:24,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1212 [2020-10-28 14:34:24,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:24,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:24,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:34:24,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:34:24,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 14:34:24,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:24,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:24,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:24,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:24,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:24,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:24,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:24,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:24,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:24,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:24,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:24,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:24,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 23 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:24,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778569992] [2020-10-28 14:34:24,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:24,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:34:24,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788299422] [2020-10-28 14:34:24,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:34:24,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:24,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:34:24,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:34:24,859 INFO L87 Difference]: Start difference. First operand 102 states and 127 transitions. Second operand 16 states. [2020-10-28 14:34:25,354 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-28 14:34:25,826 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-28 14:34:26,459 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 86 [2020-10-28 14:34:27,137 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 100 [2020-10-28 14:34:28,107 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 168 [2020-10-28 14:34:29,229 WARN L193 SmtUtils]: Spent 980.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 173 [2020-10-28 14:34:30,263 WARN L193 SmtUtils]: Spent 985.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 172 [2020-10-28 14:34:31,070 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 154 [2020-10-28 14:34:32,036 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 159 [2020-10-28 14:34:32,929 WARN L193 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 158 [2020-10-28 14:34:33,834 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 140 [2020-10-28 14:34:34,734 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 145 [2020-10-28 14:34:35,603 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 144 [2020-10-28 14:34:36,415 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 126 [2020-10-28 14:34:37,252 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 131 [2020-10-28 14:34:38,037 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 130 [2020-10-28 14:34:38,807 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 112 [2020-10-28 14:34:39,570 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 117 [2020-10-28 14:34:40,287 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 116 [2020-10-28 14:34:41,057 WARN L193 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 102 [2020-10-28 14:34:41,778 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 104 [2020-10-28 14:34:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:41,872 INFO L93 Difference]: Finished difference Result 115 states and 141 transitions. [2020-10-28 14:34:41,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:34:41,873 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2020-10-28 14:34:41,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:41,875 INFO L225 Difference]: With dead ends: 115 [2020-10-28 14:34:41,875 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 14:34:41,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=410, Invalid=922, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:34:41,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 14:34:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2020-10-28 14:34:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 14:34:41,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2020-10-28 14:34:41,888 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 77 [2020-10-28 14:34:41,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:41,889 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2020-10-28 14:34:41,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:34:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2020-10-28 14:34:41,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 14:34:41,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:41,890 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:41,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:34:41,890 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:41,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:41,891 INFO L82 PathProgramCache]: Analyzing trace with hash -902095224, now seen corresponding path program 8 times [2020-10-28 14:34:41,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:41,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74522290] [2020-10-28 14:34:41,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:41,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:42,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:42,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 14:34:42,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:42,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 981 [2020-10-28 14:34:42,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:42,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:42,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:34:42,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:42,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 14:34:42,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:43,551 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-28 14:34:43,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:43,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:44,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:44,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:44,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:44,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:44,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:44,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:44,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:44,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:44,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:44,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:44,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74522290] [2020-10-28 14:34:44,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:44,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:34:44,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806163901] [2020-10-28 14:34:44,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:34:44,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:44,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:34:44,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:34:44,087 INFO L87 Difference]: Start difference. First operand 105 states and 131 transitions. Second operand 15 states. [2020-10-28 14:34:45,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:45,701 INFO L93 Difference]: Finished difference Result 184 states and 226 transitions. [2020-10-28 14:34:45,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:34:45,702 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-10-28 14:34:45,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:45,703 INFO L225 Difference]: With dead ends: 184 [2020-10-28 14:34:45,704 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 14:34:45,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:34:45,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 14:34:45,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-10-28 14:34:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 14:34:45,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 138 transitions. [2020-10-28 14:34:45,717 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 138 transitions. Word has length 83 [2020-10-28 14:34:45,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:45,717 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 138 transitions. [2020-10-28 14:34:45,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:34:45,717 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 138 transitions. [2020-10-28 14:34:45,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 14:34:45,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:45,718 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:45,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:34:45,719 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:45,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:45,719 INFO L82 PathProgramCache]: Analyzing trace with hash 481755897, now seen corresponding path program 9 times [2020-10-28 14:34:45,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:45,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126428842] [2020-10-28 14:34:45,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:45,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:47,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:49,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:49,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 14:34:49,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:49,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3425 [2020-10-28 14:34:49,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:49,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:49,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:34:49,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:34:49,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 14:34:49,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:49,754 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-28 14:34:50,077 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-28 14:34:50,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:50,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:50,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:50,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:50,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:50,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:50,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:50,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:50,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:50,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:50,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:50,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 28 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:50,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126428842] [2020-10-28 14:34:50,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:50,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:34:50,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356232474] [2020-10-28 14:34:50,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:34:50,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:50,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:34:50,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:34:50,894 INFO L87 Difference]: Start difference. First operand 110 states and 138 transitions. Second operand 18 states. [2020-10-28 14:34:51,548 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-28 14:34:51,905 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-28 14:34:52,375 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 87 [2020-10-28 14:34:52,924 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 100 [2020-10-28 14:34:53,816 WARN L193 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 178 [2020-10-28 14:34:54,742 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 181 [2020-10-28 14:34:55,704 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 180 [2020-10-28 14:34:56,615 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 182 [2020-10-28 14:34:57,404 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 165 [2020-10-28 14:34:58,224 WARN L193 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 168 [2020-10-28 14:34:59,030 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 167 [2020-10-28 14:34:59,882 WARN L193 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 169 [2020-10-28 14:35:00,598 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 152 [2020-10-28 14:35:01,331 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 155 [2020-10-28 14:35:02,060 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 154 [2020-10-28 14:35:02,818 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 156 [2020-10-28 14:35:03,494 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 139 [2020-10-28 14:35:04,181 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 142 [2020-10-28 14:35:04,877 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 141 [2020-10-28 14:35:05,580 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 143 [2020-10-28 14:35:06,193 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 126 [2020-10-28 14:35:06,782 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 129 [2020-10-28 14:35:07,397 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 128 [2020-10-28 14:35:08,061 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 130 [2020-10-28 14:35:08,623 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 113 [2020-10-28 14:35:09,194 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 116 [2020-10-28 14:35:09,779 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 115 [2020-10-28 14:35:10,387 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 117 [2020-10-28 14:35:11,000 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 102 [2020-10-28 14:35:11,552 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 104 [2020-10-28 14:35:12,074 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 102 [2020-10-28 14:35:12,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:12,097 INFO L93 Difference]: Finished difference Result 148 states and 184 transitions. [2020-10-28 14:35:12,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 14:35:12,098 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 88 [2020-10-28 14:35:12,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:12,100 INFO L225 Difference]: With dead ends: 148 [2020-10-28 14:35:12,100 INFO L226 Difference]: Without dead ends: 131 [2020-10-28 14:35:12,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=760, Invalid=1690, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 14:35:12,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-28 14:35:12,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 118. [2020-10-28 14:35:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-28 14:35:12,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2020-10-28 14:35:12,117 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 88 [2020-10-28 14:35:12,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:12,117 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2020-10-28 14:35:12,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:35:12,118 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2020-10-28 14:35:12,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 14:35:12,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:12,119 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:12,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:35:12,119 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:12,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:12,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1321447137, now seen corresponding path program 5 times [2020-10-28 14:35:12,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:12,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057373982] [2020-10-28 14:35:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:12,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:13,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:13,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 14:35:13,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:13,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1768 [2020-10-28 14:35:13,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:13,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:13,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:35:13,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:35:13,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 14:35:13,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:14,506 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-28 14:35:15,174 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 102 [2020-10-28 14:35:15,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:15,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:15,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:15,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:15,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:15,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:15,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:15,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:15,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:15,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:15,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:15,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 28 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:16,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057373982] [2020-10-28 14:35:16,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:16,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:35:16,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025227588] [2020-10-28 14:35:16,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:35:16,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:16,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:35:16,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:35:16,122 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand 18 states. [2020-10-28 14:35:16,739 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-28 14:35:17,092 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-28 14:35:17,627 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 99 [2020-10-28 14:35:18,246 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 113 [2020-10-28 14:35:18,994 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 195 [2020-10-28 14:35:19,931 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 200 [2020-10-28 14:35:20,728 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 199 [2020-10-28 14:35:21,489 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 181 [2020-10-28 14:35:22,251 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 186 [2020-10-28 14:35:22,955 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 185 [2020-10-28 14:35:23,688 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 167 [2020-10-28 14:35:24,454 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 172 [2020-10-28 14:35:25,169 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 171 [2020-10-28 14:35:25,887 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 153 [2020-10-28 14:35:26,588 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 158 [2020-10-28 14:35:27,271 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 157 [2020-10-28 14:35:27,948 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 139 [2020-10-28 14:35:28,604 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 144 [2020-10-28 14:35:29,241 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 143 [2020-10-28 14:35:29,875 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 125 [2020-10-28 14:35:30,523 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 130 [2020-10-28 14:35:31,127 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 129 [2020-10-28 14:35:31,797 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 115 [2020-10-28 14:35:32,382 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 117 [2020-10-28 14:35:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:32,499 INFO L93 Difference]: Finished difference Result 131 states and 161 transitions. [2020-10-28 14:35:32,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 14:35:32,501 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 90 [2020-10-28 14:35:32,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:32,502 INFO L225 Difference]: With dead ends: 131 [2020-10-28 14:35:32,503 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 14:35:32,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=558, Invalid=1248, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:35:32,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 14:35:32,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2020-10-28 14:35:32,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 14:35:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 151 transitions. [2020-10-28 14:35:32,518 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 151 transitions. Word has length 90 [2020-10-28 14:35:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:32,519 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 151 transitions. [2020-10-28 14:35:32,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:35:32,519 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 151 transitions. [2020-10-28 14:35:32,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 14:35:32,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:32,520 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:32,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:35:32,520 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:32,520 INFO L82 PathProgramCache]: Analyzing trace with hash -651569147, now seen corresponding path program 10 times [2020-10-28 14:35:32,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:32,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593603846] [2020-10-28 14:35:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:32,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:34,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:34,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 14:35:34,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:34,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1580 [2020-10-28 14:35:34,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:34,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:34,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:35:34,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:34,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 14:35:34,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:34,880 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-28 14:35:35,347 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 64 [2020-10-28 14:35:35,497 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 32 [2020-10-28 14:35:36,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:36,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:36,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:36,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:36,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:36,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:36,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:36,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:36,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:36,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:36,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:36,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 24 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:36,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593603846] [2020-10-28 14:35:36,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:36,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:35:36,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773161109] [2020-10-28 14:35:36,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:35:36,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:36,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:35:36,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:35:36,295 INFO L87 Difference]: Start difference. First operand 121 states and 151 transitions. Second operand 17 states. [2020-10-28 14:35:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:38,523 INFO L93 Difference]: Finished difference Result 211 states and 259 transitions. [2020-10-28 14:35:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:35:38,525 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2020-10-28 14:35:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:38,527 INFO L225 Difference]: With dead ends: 211 [2020-10-28 14:35:38,527 INFO L226 Difference]: Without dead ends: 126 [2020-10-28 14:35:38,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:35:38,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-28 14:35:38,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-28 14:35:38,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 14:35:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 158 transitions. [2020-10-28 14:35:38,549 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 158 transitions. Word has length 96 [2020-10-28 14:35:38,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:38,550 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 158 transitions. [2020-10-28 14:35:38,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:35:38,550 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 158 transitions. [2020-10-28 14:35:38,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 14:35:38,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:38,551 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:38,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:35:38,552 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:38,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:38,552 INFO L82 PathProgramCache]: Analyzing trace with hash -519670988, now seen corresponding path program 11 times [2020-10-28 14:35:38,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:38,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475463538] [2020-10-28 14:35:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:38,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:40,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:41,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:41,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 14:35:41,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:41,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3059 [2020-10-28 14:35:41,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:41,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:41,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:35:41,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:35:41,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 14:35:41,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:42,204 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-28 14:35:43,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:43,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:43,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:43,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:43,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:43,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:43,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:43,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:43,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:43,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:43,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:43,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 33 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:43,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475463538] [2020-10-28 14:35:43,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:43,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:35:43,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828417963] [2020-10-28 14:35:43,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:35:43,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:43,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:35:43,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:35:43,152 INFO L87 Difference]: Start difference. First operand 126 states and 158 transitions. Second operand 20 states. [2020-10-28 14:35:44,265 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-28 14:35:44,575 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-28 14:35:44,930 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 14:35:45,385 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-28 14:35:45,854 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-28 14:35:46,420 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-28 14:35:46,871 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-28 14:35:47,308 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-28 14:35:47,725 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 14:35:48,127 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-28 14:35:48,540 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 14:35:48,906 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 14:35:49,293 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 14:35:49,671 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 14:35:50,056 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 14:35:50,416 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-28 14:35:50,788 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-28 14:35:51,172 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 14:35:51,569 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 14:35:51,925 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 14:35:52,294 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 14:35:52,662 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-28 14:35:53,042 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 14:35:53,383 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 14:35:53,730 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 14:35:54,063 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 14:35:54,410 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 14:35:54,714 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 14:35:55,030 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-28 14:35:55,336 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 14:35:55,652 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 14:35:56,032 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 14:35:56,354 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 14:35:56,652 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 14:35:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:56,670 INFO L93 Difference]: Finished difference Result 164 states and 204 transitions. [2020-10-28 14:35:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 14:35:56,673 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-10-28 14:35:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:56,674 INFO L225 Difference]: With dead ends: 164 [2020-10-28 14:35:56,674 INFO L226 Difference]: Without dead ends: 147 [2020-10-28 14:35:56,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=999, Invalid=2193, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 14:35:56,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-28 14:35:56,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 134. [2020-10-28 14:35:56,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-28 14:35:56,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 167 transitions. [2020-10-28 14:35:56,691 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 167 transitions. Word has length 101 [2020-10-28 14:35:56,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:56,691 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 167 transitions. [2020-10-28 14:35:56,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:35:56,691 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 167 transitions. [2020-10-28 14:35:56,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 14:35:56,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:56,692 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:56,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:35:56,693 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:56,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:56,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1022884956, now seen corresponding path program 6 times [2020-10-28 14:35:56,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:56,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511912463] [2020-10-28 14:35:56,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:56,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:58,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:58,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 14:35:58,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:58,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1685 [2020-10-28 14:35:58,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:58,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:35:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:35:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 14:35:58,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:59,127 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-10-28 14:36:00,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:00,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:00,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:00,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:00,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:00,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:00,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:00,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:00,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:00,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:00,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:00,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 33 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:00,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511912463] [2020-10-28 14:36:00,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:00,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:36:00,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302172872] [2020-10-28 14:36:00,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:36:00,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:00,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:36:00,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:36:00,129 INFO L87 Difference]: Start difference. First operand 134 states and 167 transitions. Second operand 20 states. [2020-10-28 14:36:00,894 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-28 14:36:01,248 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-28 14:36:01,748 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2020-10-28 14:36:02,352 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 111 [2020-10-28 14:36:03,011 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 128 [2020-10-28 14:36:03,910 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 224 [2020-10-28 14:36:04,986 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 229 [2020-10-28 14:36:05,887 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 228 [2020-10-28 14:36:06,766 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 210 [2020-10-28 14:36:07,667 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 215 [2020-10-28 14:36:08,616 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 214 [2020-10-28 14:36:09,538 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 196 [2020-10-28 14:36:10,443 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 201 [2020-10-28 14:36:11,244 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 200 [2020-10-28 14:36:12,018 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 182 [2020-10-28 14:36:12,831 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 187 [2020-10-28 14:36:13,604 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 186 [2020-10-28 14:36:14,379 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 168 [2020-10-28 14:36:15,247 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 173 [2020-10-28 14:36:16,061 WARN L193 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 172 [2020-10-28 14:36:16,865 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 154 [2020-10-28 14:36:17,658 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 159 [2020-10-28 14:36:18,411 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 158 [2020-10-28 14:36:19,158 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 140 [2020-10-28 14:36:19,888 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 145 [2020-10-28 14:36:20,594 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 144 [2020-10-28 14:36:21,302 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 130 [2020-10-28 14:36:21,919 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 132 [2020-10-28 14:36:22,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:22,040 INFO L93 Difference]: Finished difference Result 147 states and 181 transitions. [2020-10-28 14:36:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 14:36:22,041 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-10-28 14:36:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:22,043 INFO L225 Difference]: With dead ends: 147 [2020-10-28 14:36:22,043 INFO L226 Difference]: Without dead ends: 143 [2020-10-28 14:36:22,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=729, Invalid=1623, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 14:36:22,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-28 14:36:22,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2020-10-28 14:36:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 14:36:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2020-10-28 14:36:22,064 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 103 [2020-10-28 14:36:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:22,064 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2020-10-28 14:36:22,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:36:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2020-10-28 14:36:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 14:36:22,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:22,066 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:22,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:36:22,066 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:22,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:22,066 INFO L82 PathProgramCache]: Analyzing trace with hash -87106240, now seen corresponding path program 12 times [2020-10-28 14:36:22,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:22,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471708438] [2020-10-28 14:36:22,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:22,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:23,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:23,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 14:36:23,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:23,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1237 [2020-10-28 14:36:23,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:23,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:23,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:36:23,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:23,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 14:36:23,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:23,910 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-28 14:36:24,050 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-28 14:36:24,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:24,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:24,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:24,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:24,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:24,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:24,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:24,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:24,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:24,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:24,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:24,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 28 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:24,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471708438] [2020-10-28 14:36:24,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:24,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:36:24,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428471436] [2020-10-28 14:36:24,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:36:24,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:24,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:36:24,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:36:24,939 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand 19 states. [2020-10-28 14:36:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:27,833 INFO L93 Difference]: Finished difference Result 238 states and 292 transitions. [2020-10-28 14:36:27,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:36:27,834 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 109 [2020-10-28 14:36:27,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:27,836 INFO L225 Difference]: With dead ends: 238 [2020-10-28 14:36:27,836 INFO L226 Difference]: Without dead ends: 142 [2020-10-28 14:36:27,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:36:27,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-28 14:36:27,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-28 14:36:27,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 14:36:27,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 178 transitions. [2020-10-28 14:36:27,855 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 178 transitions. Word has length 109 [2020-10-28 14:36:27,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:27,856 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 178 transitions. [2020-10-28 14:36:27,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:36:27,856 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 178 transitions. [2020-10-28 14:36:27,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 14:36:27,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:27,857 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:27,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:36:27,858 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:27,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:27,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1497245297, now seen corresponding path program 13 times [2020-10-28 14:36:27,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:27,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759255677] [2020-10-28 14:36:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:28,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:29,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:31,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:31,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 14:36:31,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:36:31,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3822 [2020-10-28 14:36:31,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:31,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:31,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:36:31,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:36:31,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-28 14:36:31,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:32,800 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-28 14:36:33,030 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2020-10-28 14:36:33,622 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 70 [2020-10-28 14:36:34,238 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 105 [2020-10-28 14:36:35,006 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 89 [2020-10-28 14:36:35,269 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 47 [2020-10-28 14:36:35,539 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 47 [2020-10-28 14:36:35,816 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 43 [2020-10-28 14:36:36,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:36,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:36,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:36,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:36,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:36,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:36:36,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:36,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:36,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:36,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:36,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:36,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 38 proven. 329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:37,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759255677] [2020-10-28 14:36:37,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:37,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:36:37,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838328460] [2020-10-28 14:36:37,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:36:37,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:37,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:36:37,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:36:37,012 INFO L87 Difference]: Start difference. First operand 142 states and 178 transitions. Second operand 22 states. [2020-10-28 14:36:37,637 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-28 14:36:37,982 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2020-10-28 14:36:38,416 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 77 [2020-10-28 14:36:38,959 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 103 [2020-10-28 14:36:39,769 WARN L193 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 143 [2020-10-28 14:36:40,765 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 160 [2020-10-28 14:36:41,822 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 174 [2020-10-28 14:36:43,229 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 363 DAG size of output: 284 [2020-10-28 14:36:44,706 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 366 DAG size of output: 287 [2020-10-28 14:36:46,333 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 365 DAG size of output: 286 [2020-10-28 14:36:47,836 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 367 DAG size of output: 288 [2020-10-28 14:36:49,242 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 349 DAG size of output: 270 [2020-10-28 14:36:50,712 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 352 DAG size of output: 273 [2020-10-28 14:36:52,156 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 351 DAG size of output: 272 [2020-10-28 14:36:53,546 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 353 DAG size of output: 274 [2020-10-28 14:36:54,842 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 335 DAG size of output: 256 [2020-10-28 14:36:56,156 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 338 DAG size of output: 259 [2020-10-28 14:36:57,467 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 337 DAG size of output: 258 [2020-10-28 14:36:58,790 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 339 DAG size of output: 260 [2020-10-28 14:37:00,055 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 321 DAG size of output: 242 [2020-10-28 14:37:01,336 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 324 DAG size of output: 245 [2020-10-28 14:37:02,681 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 323 DAG size of output: 244 [2020-10-28 14:37:04,029 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 325 DAG size of output: 246 [2020-10-28 14:37:05,305 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 307 DAG size of output: 228 [2020-10-28 14:37:06,644 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 310 DAG size of output: 231 [2020-10-28 14:37:07,893 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 309 DAG size of output: 230 [2020-10-28 14:37:09,181 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 311 DAG size of output: 232 [2020-10-28 14:37:10,410 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 293 DAG size of output: 214 [2020-10-28 14:37:11,660 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 296 DAG size of output: 217 [2020-10-28 14:37:12,861 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 295 DAG size of output: 216 [2020-10-28 14:37:14,062 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 297 DAG size of output: 218 [2020-10-28 14:37:15,169 WARN L193 SmtUtils]: Spent 934.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 200 [2020-10-28 14:37:16,362 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 282 DAG size of output: 203 [2020-10-28 14:37:17,533 WARN L193 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 202 [2020-10-28 14:37:18,719 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 283 DAG size of output: 204 [2020-10-28 14:37:19,807 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 186 [2020-10-28 14:37:20,923 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 189 [2020-10-28 14:37:22,055 WARN L193 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 188 [2020-10-28 14:37:23,199 WARN L193 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 190 [2020-10-28 14:37:24,417 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 176 [2020-10-28 14:37:25,533 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 178 [2020-10-28 14:37:26,592 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 176 [2020-10-28 14:37:26,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:26,614 INFO L93 Difference]: Finished difference Result 180 states and 224 transitions. [2020-10-28 14:37:26,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-28 14:37:26,616 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 114 [2020-10-28 14:37:26,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:26,617 INFO L225 Difference]: With dead ends: 180 [2020-10-28 14:37:26,617 INFO L226 Difference]: Without dead ends: 163 [2020-10-28 14:37:26,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 51.3s TimeCoverageRelationStatistics Valid=1267, Invalid=2765, Unknown=0, NotChecked=0, Total=4032 [2020-10-28 14:37:26,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-28 14:37:26,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 150. [2020-10-28 14:37:26,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-28 14:37:26,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 187 transitions. [2020-10-28 14:37:26,641 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 187 transitions. Word has length 114 [2020-10-28 14:37:26,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:26,641 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 187 transitions. [2020-10-28 14:37:26,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:37:26,642 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 187 transitions. [2020-10-28 14:37:26,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 14:37:26,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:26,643 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:26,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:37:26,643 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:26,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:26,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2045782951, now seen corresponding path program 7 times [2020-10-28 14:37:26,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:26,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112840861] [2020-10-28 14:37:26,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:26,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:29,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:29,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 14:37:29,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:29,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2535 [2020-10-28 14:37:29,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:29,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:29,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:37:29,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:37:29,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-28 14:37:29,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0