/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/min_max.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:33:41,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:33:41,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:33:41,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:33:41,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:33:41,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:33:41,707 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:33:41,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:33:41,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:33:41,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:33:41,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:33:41,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:33:41,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:33:41,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:33:41,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:33:41,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:33:41,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:33:41,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:33:41,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:33:41,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:33:41,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:33:41,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:33:41,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:33:41,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:33:41,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:33:41,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:33:41,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:33:41,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:33:41,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:33:41,796 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:33:41,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:33:41,797 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:33:41,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:33:41,799 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:33:41,800 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:33:41,801 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:33:41,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:33:41,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:33:41,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:33:41,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:33:41,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:33:41,806 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 14:33:41,834 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:33:41,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:33:41,836 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:33:41,836 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:33:41,837 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:33:41,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:33:41,837 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:33:41,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:33:41,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:33:41,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:33:41,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:33:41,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:33:41,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:33:41,839 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:33:41,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:33:41,840 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:33:41,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:33:41,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:33:41,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:33:41,841 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:33:41,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:33:41,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:33:41,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:33:41,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:33:41,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:33:41,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:33:41,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:33:41,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:33:41,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:33:41,844 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:33:42,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:33:42,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:33:42,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:33:42,277 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:33:42,278 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:33:42,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/min_max.i [2020-10-28 14:33:42,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ad8e30b7/f2bfbd37f77d41a691e9063211f94761/FLAG813bac9eb [2020-10-28 14:33:43,097 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:33:43,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-data/min_max.i [2020-10-28 14:33:43,117 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ad8e30b7/f2bfbd37f77d41a691e9063211f94761/FLAG813bac9eb [2020-10-28 14:33:43,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ad8e30b7/f2bfbd37f77d41a691e9063211f94761 [2020-10-28 14:33:43,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:33:43,371 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:33:43,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:33:43,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:33:43,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:33:43,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:33:43" (1/1) ... [2020-10-28 14:33:43,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e44770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:43, skipping insertion in model container [2020-10-28 14:33:43,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:33:43" (1/1) ... [2020-10-28 14:33:43,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:33:43,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:33:43,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:33:43,839 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:33:43,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:33:44,042 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:33:44,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:44 WrapperNode [2020-10-28 14:33:44,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:33:44,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:33:44,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:33:44,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:33:44,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:44" (1/1) ... [2020-10-28 14:33:44,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:44" (1/1) ... [2020-10-28 14:33:44,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:44" (1/1) ... [2020-10-28 14:33:44,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:44" (1/1) ... [2020-10-28 14:33:44,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:44" (1/1) ... [2020-10-28 14:33:44,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:44" (1/1) ... [2020-10-28 14:33:44,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:44" (1/1) ... [2020-10-28 14:33:44,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:33:44,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:33:44,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:33:44,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:33:44,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:44" (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 14:33:44,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:33:44,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:33:44,318 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:33:44,318 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-28 14:33:44,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-28 14:33:44,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:33:44,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:33:44,320 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:33:44,321 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:33:44,321 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:33:44,322 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:33:44,323 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:33:44,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:33:44,323 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-28 14:33:44,323 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-28 14:33:44,324 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:33:44,325 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:33:44,325 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:33:44,325 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:33:44,325 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:33:44,325 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:33:44,325 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:33:44,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:33:44,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:33:44,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:33:44,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:33:44,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:33:44,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:33:44,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:33:44,327 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:33:44,327 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:33:44,327 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:33:44,327 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:33:44,328 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:33:44,328 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:33:44,328 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:33:44,328 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:33:44,328 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:33:44,328 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:33:44,329 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:33:44,329 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:33:44,329 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:33:44,329 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:33:44,329 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:33:44,329 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:33:44,330 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:33:44,330 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:33:44,330 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:33:44,330 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:33:44,330 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:33:44,330 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:33:44,330 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:33:44,331 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:33:44,332 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:33:44,332 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:33:44,333 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:33:44,333 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:33:44,333 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:33:44,334 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:33:44,334 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:33:44,334 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:33:44,335 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:33:44,335 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:33:44,335 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:33:44,335 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:33:44,335 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:33:44,335 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:33:44,335 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:33:44,335 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:33:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:33:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:33:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:33:44,339 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:33:44,339 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:33:44,339 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:33:44,340 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:33:44,340 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:33:44,340 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:33:44,340 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:33:44,340 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:33:44,340 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:33:44,340 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:33:44,341 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:33:44,342 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:33:44,342 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:33:44,342 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:33:44,342 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:33:44,342 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:33:44,342 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:33:44,342 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:33:44,343 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:33:44,343 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:33:44,343 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:33:44,343 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:33:44,343 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:33:44,343 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:33:44,343 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:33:44,344 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:33:44,344 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:33:44,344 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:33:44,344 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:33:44,344 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:33:44,344 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:33:44,344 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:33:44,344 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:33:44,345 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:33:44,345 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:33:44,345 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:33:44,345 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:33:44,345 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:33:44,345 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:33:44,345 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:33:44,346 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:33:44,346 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:33:44,346 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:33:44,346 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:33:44,347 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:33:44,348 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:33:44,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:33:44,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:33:44,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:33:44,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:33:44,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:33:44,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:33:44,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:33:44,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:33:44,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:33:45,090 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:33:45,090 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 14:33:45,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:33:45 BoogieIcfgContainer [2020-10-28 14:33:45,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:33:45,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:33:45,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:33:45,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:33:45,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:33:43" (1/3) ... [2020-10-28 14:33:45,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7052cdad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:33:45, skipping insertion in model container [2020-10-28 14:33:45,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:44" (2/3) ... [2020-10-28 14:33:45,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7052cdad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:33:45, skipping insertion in model container [2020-10-28 14:33:45,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:33:45" (3/3) ... [2020-10-28 14:33:45,103 INFO L111 eAbstractionObserver]: Analyzing ICFG min_max.i [2020-10-28 14:33:45,116 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:33:45,122 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:33:45,137 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:33:45,166 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:33:45,166 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:33:45,166 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:33:45,166 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:33:45,167 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:33:45,167 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:33:45,167 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:33:45,167 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:33:45,185 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-28 14:33:45,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 14:33:45,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:45,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:45,192 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:45,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:45,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1944775018, now seen corresponding path program 1 times [2020-10-28 14:33:45,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:45,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129477972] [2020-10-28 14:33:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:45,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:45,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:45,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:45,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 14:33:45,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:45,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-10-28 14:33:45,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:45,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:45,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:45,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:33:45,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:45,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 14:33:45,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:45,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:45,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:45,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:45,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:45,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:33:45,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:45,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:45,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:45,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:45,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:45,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:45,815 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 14:33:45,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129477972] [2020-10-28 14:33:45,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:45,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:33:45,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665863243] [2020-10-28 14:33:45,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:33:45,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:45,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:33:45,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:33:45,844 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-10-28 14:33:45,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:45,960 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2020-10-28 14:33:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:33:45,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-28 14:33:45,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:45,972 INFO L225 Difference]: With dead ends: 55 [2020-10-28 14:33:45,972 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 14:33:45,976 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 14:33:45,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 14:33:46,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2020-10-28 14:33:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 14:33:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-28 14:33:46,019 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2020-10-28 14:33:46,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:46,020 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-28 14:33:46,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:33:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-28 14:33:46,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 14:33:46,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:46,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:46,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:33:46,021 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:46,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:46,022 INFO L82 PathProgramCache]: Analyzing trace with hash -281735583, now seen corresponding path program 1 times [2020-10-28 14:33:46,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:46,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783877485] [2020-10-28 14:33:46,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:46,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:46,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:46,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:33:46,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:46,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-28 14:33:46,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:46,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:46,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:33:46,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:46,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:33:46,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:46,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:46,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:46,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:46,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:46,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:46,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:33:46,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:46,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:46,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:46,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:46,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:46,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:46,283 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 14:33:46,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783877485] [2020-10-28 14:33:46,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:46,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:33:46,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401311981] [2020-10-28 14:33:46,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:33:46,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:46,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:33:46,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:33:46,287 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2020-10-28 14:33:46,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:46,513 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-10-28 14:33:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:33:46,514 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-28 14:33:46,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:46,515 INFO L225 Difference]: With dead ends: 36 [2020-10-28 14:33:46,515 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 14:33:46,516 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 14:33:46,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 14:33:46,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 14:33:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 14:33:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-28 14:33:46,524 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2020-10-28 14:33:46,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:46,525 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-28 14:33:46,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:33:46,525 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-28 14:33:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:33:46,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:46,526 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:46,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:33:46,526 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:46,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1011840127, now seen corresponding path program 1 times [2020-10-28 14:33:46,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:46,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022093699] [2020-10-28 14:33:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:46,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:46,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:46,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:33:46,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:46,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-28 14:33:46,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:46,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:46,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:33:46,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:33:46,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:33:46,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:46,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:46,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:46,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:46,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:46,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:46,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:33:46,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:46,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:46,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:46,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:46,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:46,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:46,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022093699] [2020-10-28 14:33:46,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:46,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:33:46,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186159809] [2020-10-28 14:33:46,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:33:46,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:46,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:33:46,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:33:46,974 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-10-28 14:33:47,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:47,242 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-10-28 14:33:47,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:33:47,243 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-28 14:33:47,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:47,244 INFO L225 Difference]: With dead ends: 46 [2020-10-28 14:33:47,244 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 14:33:47,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:33:47,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 14:33:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2020-10-28 14:33:47,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 14:33:47,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-28 14:33:47,255 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 19 [2020-10-28 14:33:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:47,256 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-28 14:33:47,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:33:47,256 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-28 14:33:47,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:33:47,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:47,257 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:47,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:33:47,258 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:47,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:47,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1712904705, now seen corresponding path program 1 times [2020-10-28 14:33:47,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:47,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36798488] [2020-10-28 14:33:47,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:47,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:47,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:47,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:33:47,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:47,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-28 14:33:47,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:47,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:47,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:33:47,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:33:47,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:33:47,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:47,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:47,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:47,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:47,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:47,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:47,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:33:47,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:47,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:47,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:47,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:47,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:47,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:47,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36798488] [2020-10-28 14:33:47,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:47,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:33:47,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147375755] [2020-10-28 14:33:47,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:33:47,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:47,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:33:47,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:33:47,541 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 7 states. [2020-10-28 14:33:47,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:47,804 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-10-28 14:33:47,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:33:47,805 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-28 14:33:47,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:47,806 INFO L225 Difference]: With dead ends: 48 [2020-10-28 14:33:47,806 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 14:33:47,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:33:47,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 14:33:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 26. [2020-10-28 14:33:47,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 14:33:47,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-28 14:33:47,826 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2020-10-28 14:33:47,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:47,827 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-28 14:33:47,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:33:47,827 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-28 14:33:47,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:33:47,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:47,828 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:47,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:33:47,831 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:47,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:47,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1786754843, now seen corresponding path program 1 times [2020-10-28 14:33:47,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:47,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6809368] [2020-10-28 14:33:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:47,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:47,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:47,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:33:47,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:47,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-28 14:33:47,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:47,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:47,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:33:47,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:33:47,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:33:47,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:48,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:48,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:48,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:48,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:48,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:48,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:48,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:48,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:48,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:48,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:48,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:48,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:48,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6809368] [2020-10-28 14:33:48,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:48,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:33:48,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123092393] [2020-10-28 14:33:48,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:33:48,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:48,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:33:48,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:33:48,078 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2020-10-28 14:33:48,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:48,280 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-10-28 14:33:48,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:33:48,280 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-28 14:33:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:48,281 INFO L225 Difference]: With dead ends: 45 [2020-10-28 14:33:48,282 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 14:33:48,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:33:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 14:33:48,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-10-28 14:33:48,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 14:33:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-28 14:33:48,291 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 21 [2020-10-28 14:33:48,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:48,291 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-28 14:33:48,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:33:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-28 14:33:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:33:48,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:48,292 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:48,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:33:48,293 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:48,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1807147875, now seen corresponding path program 1 times [2020-10-28 14:33:48,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:48,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031726928] [2020-10-28 14:33:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:48,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:48,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:48,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:33:48,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:48,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-28 14:33:48,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:48,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:48,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:33:48,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:33:48,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:33:48,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:48,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:48,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:48,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:48,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:48,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:48,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:33:48,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:48,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:48,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:48,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:48,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:48,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:48,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031726928] [2020-10-28 14:33:48,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:48,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 14:33:48,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654599356] [2020-10-28 14:33:48,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:33:48,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:48,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:33:48,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:33:48,579 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 8 states. [2020-10-28 14:33:48,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:48,784 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-28 14:33:48,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:33:48,784 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-28 14:33:48,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:48,785 INFO L225 Difference]: With dead ends: 40 [2020-10-28 14:33:48,786 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 14:33:48,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:33:48,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 14:33:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-10-28 14:33:48,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 14:33:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-28 14:33:48,792 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2020-10-28 14:33:48,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:48,793 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-28 14:33:48,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:33:48,793 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-28 14:33:48,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:33:48,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:48,794 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] [2020-10-28 14:33:48,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:33:48,794 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:48,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:48,795 INFO L82 PathProgramCache]: Analyzing trace with hash -249146754, now seen corresponding path program 1 times [2020-10-28 14:33:48,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:48,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238615995] [2020-10-28 14:33:48,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:48,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:48,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:48,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:33:48,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:48,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-28 14:33:48,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:48,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:48,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:33:48,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:48,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:33:48,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:49,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:49,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:49,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:49,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:49,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:49,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:49,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:49,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:49,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:49,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:49,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:49,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:49,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238615995] [2020-10-28 14:33:49,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:49,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:33:49,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604508730] [2020-10-28 14:33:49,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:33:49,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:49,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:33:49,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:33:49,291 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-10-28 14:33:49,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:49,500 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-28 14:33:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:33:49,501 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-28 14:33:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:49,502 INFO L225 Difference]: With dead ends: 50 [2020-10-28 14:33:49,502 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 14:33:49,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:33:49,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 14:33:49,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-28 14:33:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 14:33:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-28 14:33:49,510 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2020-10-28 14:33:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:49,511 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-28 14:33:49,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:33:49,511 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-28 14:33:49,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:33:49,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:49,512 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:49,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:33:49,512 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:49,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:49,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1211749604, now seen corresponding path program 2 times [2020-10-28 14:33:49,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:49,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082004354] [2020-10-28 14:33:49,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:49,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:49,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:50,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:50,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:33:50,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:50,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1015 [2020-10-28 14:33:50,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:50,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:50,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:33:50,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:33:50,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:33:50,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:50,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:50,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:50,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:50,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:50,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:50,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:33:50,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:50,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:50,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:50,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:50,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:50,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:50,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082004354] [2020-10-28 14:33:50,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:50,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:33:50,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978769672] [2020-10-28 14:33:50,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:33:50,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:50,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:33:50,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:33:50,866 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 10 states. [2020-10-28 14:33:51,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:51,575 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2020-10-28 14:33:51,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:33:51,580 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-28 14:33:51,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:51,584 INFO L225 Difference]: With dead ends: 81 [2020-10-28 14:33:51,584 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 14:33:51,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:33:51,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 14:33:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-28 14:33:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 14:33:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2020-10-28 14:33:51,604 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 29 [2020-10-28 14:33:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:51,605 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2020-10-28 14:33:51,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:33:51,605 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2020-10-28 14:33:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:33:51,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:51,606 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:51,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:33:51,607 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:51,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:51,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2062149338, now seen corresponding path program 1 times [2020-10-28 14:33:51,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:51,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771991340] [2020-10-28 14:33:51,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:51,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:51,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:51,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:33:51,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:51,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-28 14:33:51,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:51,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:51,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:33:51,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:33:51,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:33:51,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:52,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:52,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:52,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:52,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:52,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:52,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:33:52,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:52,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:52,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:52,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:52,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:52,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:52,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771991340] [2020-10-28 14:33:52,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:52,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:33:52,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857017797] [2020-10-28 14:33:52,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:33:52,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:52,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:33:52,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:33:52,058 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand 9 states. [2020-10-28 14:33:52,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:52,561 INFO L93 Difference]: Finished difference Result 94 states and 113 transitions. [2020-10-28 14:33:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:33:52,563 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-28 14:33:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:52,565 INFO L225 Difference]: With dead ends: 94 [2020-10-28 14:33:52,565 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 14:33:52,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:33:52,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 14:33:52,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-28 14:33:52,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:33:52,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-10-28 14:33:52,590 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 29 [2020-10-28 14:33:52,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:52,591 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-10-28 14:33:52,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:33:52,591 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-10-28 14:33:52,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:33:52,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:52,596 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:52,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:33:52,598 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:52,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:52,599 INFO L82 PathProgramCache]: Analyzing trace with hash -789047778, now seen corresponding path program 2 times [2020-10-28 14:33:52,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:52,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813660412] [2020-10-28 14:33:52,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:52,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:52,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:52,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:53,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:54,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:54,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:33:54,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:33:54,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1947 [2020-10-28 14:33:54,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:54,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:54,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:33:54,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:54,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:33:54,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:54,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:54,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:54,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:54,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:54,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:54,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 14:33:54,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:54,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:54,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:54,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:54,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:54,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813660412] [2020-10-28 14:33:54,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:54,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:33:54,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622941238] [2020-10-28 14:33:54,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:33:54,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:54,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:33:54,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:33:54,854 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 12 states. [2020-10-28 14:33:55,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:55,877 INFO L93 Difference]: Finished difference Result 109 states and 135 transitions. [2020-10-28 14:33:55,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:33:55,879 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-28 14:33:55,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:55,881 INFO L225 Difference]: With dead ends: 109 [2020-10-28 14:33:55,881 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 14:33:55,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:33:55,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 14:33:55,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 63. [2020-10-28 14:33:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 14:33:55,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2020-10-28 14:33:55,908 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 29 [2020-10-28 14:33:55,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:55,908 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2020-10-28 14:33:55,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:33:55,909 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2020-10-28 14:33:55,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:33:55,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:55,911 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:55,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:33:55,912 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:55,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:55,913 INFO L82 PathProgramCache]: Analyzing trace with hash -484230536, now seen corresponding path program 1 times [2020-10-28 14:33:55,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:55,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294808137] [2020-10-28 14:33:55,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:55,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:55,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:56,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:57,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:57,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:33:57,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:57,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1378 [2020-10-28 14:33:57,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:57,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:57,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:33:57,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:33:57,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:33:57,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:57,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:57,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:57,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:57,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:57,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:57,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:57,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:57,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:57,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:57,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:57,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:57,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:57,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294808137] [2020-10-28 14:33:57,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:57,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:33:57,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67855502] [2020-10-28 14:33:57,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:33:57,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:57,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:33:57,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:33:57,562 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand 11 states. [2020-10-28 14:33:58,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:58,177 INFO L93 Difference]: Finished difference Result 181 states and 228 transitions. [2020-10-28 14:33:58,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:33:58,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-28 14:33:58,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:58,179 INFO L225 Difference]: With dead ends: 181 [2020-10-28 14:33:58,179 INFO L226 Difference]: Without dead ends: 177 [2020-10-28 14:33:58,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:33:58,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-28 14:33:58,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 114. [2020-10-28 14:33:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 14:33:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 150 transitions. [2020-10-28 14:33:58,205 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 150 transitions. Word has length 31 [2020-10-28 14:33:58,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:58,206 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 150 transitions. [2020-10-28 14:33:58,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:33:58,206 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 150 transitions. [2020-10-28 14:33:58,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:33:58,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:58,212 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:58,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:33:58,213 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:58,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:58,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1505298890, now seen corresponding path program 1 times [2020-10-28 14:33:58,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:58,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100496066] [2020-10-28 14:33:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:58,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:58,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:58,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:33:58,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:58,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-28 14:33:58,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:58,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:58,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:33:58,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:33:58,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:33:58,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:58,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:58,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:58,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:58,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:58,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:58,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:58,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:58,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:58,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:58,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:58,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:58,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:58,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100496066] [2020-10-28 14:33:58,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:58,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:33:58,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261041271] [2020-10-28 14:33:58,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:33:58,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:58,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:33:58,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:33:58,586 INFO L87 Difference]: Start difference. First operand 114 states and 150 transitions. Second operand 9 states. [2020-10-28 14:33:59,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:59,023 INFO L93 Difference]: Finished difference Result 180 states and 226 transitions. [2020-10-28 14:33:59,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:33:59,023 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-28 14:33:59,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:59,025 INFO L225 Difference]: With dead ends: 180 [2020-10-28 14:33:59,025 INFO L226 Difference]: Without dead ends: 176 [2020-10-28 14:33:59,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:33:59,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-28 14:33:59,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 124. [2020-10-28 14:33:59,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-28 14:33:59,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 165 transitions. [2020-10-28 14:33:59,045 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 165 transitions. Word has length 31 [2020-10-28 14:33:59,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:59,045 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 165 transitions. [2020-10-28 14:33:59,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:33:59,045 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 165 transitions. [2020-10-28 14:33:59,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:33:59,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:59,046 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:59,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:33:59,047 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:59,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:59,047 INFO L82 PathProgramCache]: Analyzing trace with hash -61528710, now seen corresponding path program 2 times [2020-10-28 14:33:59,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:59,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958742541] [2020-10-28 14:33:59,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:59,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:59,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:59,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:00,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:00,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:34:00,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:34:00,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1042 [2020-10-28 14:34:00,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:00,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:00,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:34:00,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:34:00,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:34:00,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:00,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:00,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:00,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:00,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:00,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:00,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:34:00,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:00,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:00,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:00,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:00,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:00,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:00,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958742541] [2020-10-28 14:34:00,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:00,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:34:00,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886691073] [2020-10-28 14:34:00,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:34:00,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:00,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:34:00,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:34:00,342 INFO L87 Difference]: Start difference. First operand 124 states and 165 transitions. Second operand 12 states. [2020-10-28 14:34:01,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:01,090 INFO L93 Difference]: Finished difference Result 173 states and 218 transitions. [2020-10-28 14:34:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:34:01,090 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-28 14:34:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:01,092 INFO L225 Difference]: With dead ends: 173 [2020-10-28 14:34:01,092 INFO L226 Difference]: Without dead ends: 169 [2020-10-28 14:34:01,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:34:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-28 14:34:01,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 114. [2020-10-28 14:34:01,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 14:34:01,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 150 transitions. [2020-10-28 14:34:01,112 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 150 transitions. Word has length 31 [2020-10-28 14:34:01,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:01,112 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 150 transitions. [2020-10-28 14:34:01,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:34:01,113 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 150 transitions. [2020-10-28 14:34:01,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:34:01,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:01,113 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:01,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:34:01,114 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:01,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:01,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1082597064, now seen corresponding path program 1 times [2020-10-28 14:34:01,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:01,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046812647] [2020-10-28 14:34:01,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:01,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:01,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:01,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:34:01,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:01,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-28 14:34:01,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:01,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:01,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:34:01,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:34:01,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:34:01,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:01,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:01,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:01,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:01,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:01,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:01,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:01,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:01,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:01,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:01,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:01,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:01,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:01,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046812647] [2020-10-28 14:34:01,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:01,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:34:01,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891428124] [2020-10-28 14:34:01,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:34:01,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:01,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:34:01,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:34:01,495 INFO L87 Difference]: Start difference. First operand 114 states and 150 transitions. Second operand 10 states. [2020-10-28 14:34:02,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:02,216 INFO L93 Difference]: Finished difference Result 154 states and 194 transitions. [2020-10-28 14:34:02,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:34:02,217 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-28 14:34:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:02,218 INFO L225 Difference]: With dead ends: 154 [2020-10-28 14:34:02,218 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 14:34:02,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:34:02,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 14:34:02,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 68. [2020-10-28 14:34:02,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 14:34:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2020-10-28 14:34:02,236 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 31 [2020-10-28 14:34:02,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:02,236 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2020-10-28 14:34:02,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:34:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2020-10-28 14:34:02,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:34:02,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:02,237 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:02,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:34:02,237 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:02,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:02,238 INFO L82 PathProgramCache]: Analyzing trace with hash -849725951, now seen corresponding path program 3 times [2020-10-28 14:34:02,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:02,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369107992] [2020-10-28 14:34:02,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:02,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:02,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:02,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:02,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:05,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:05,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:34:05,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:34:05,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2790 [2020-10-28 14:34:05,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:05,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:05,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:34:05,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:05,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:34:05,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:05,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:05,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:05,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:05,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:05,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:05,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:05,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:05,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:05,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:05,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:05,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:05,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:05,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369107992] [2020-10-28 14:34:05,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:05,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:34:05,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56295877] [2020-10-28 14:34:05,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:34:05,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:05,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:34:05,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:34:05,213 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand 9 states. [2020-10-28 14:34:05,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:05,446 INFO L93 Difference]: Finished difference Result 104 states and 131 transitions. [2020-10-28 14:34:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:34:05,447 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-28 14:34:05,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:05,448 INFO L225 Difference]: With dead ends: 104 [2020-10-28 14:34:05,448 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 14:34:05,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:34:05,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 14:34:05,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-28 14:34:05,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 14:34:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2020-10-28 14:34:05,462 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 34 [2020-10-28 14:34:05,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:05,464 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2020-10-28 14:34:05,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:34:05,464 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2020-10-28 14:34:05,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:34:05,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:05,465 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:05,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:34:05,466 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:05,466 INFO L82 PathProgramCache]: Analyzing trace with hash -98766784, now seen corresponding path program 3 times [2020-10-28 14:34:05,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:05,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079706673] [2020-10-28 14:34:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:05,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:05,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:05,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:05,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:07,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:07,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:34:07,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:34:07,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1985 [2020-10-28 14:34:07,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:07,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:07,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:34:07,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:34:07,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:34:07,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:07,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:07,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:07,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:07,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:07,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:07,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:07,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:07,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:07,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:07,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:07,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079706673] [2020-10-28 14:34:07,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:07,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:34:07,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969405608] [2020-10-28 14:34:07,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:34:07,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:07,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:34:07,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:34:07,732 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand 13 states. [2020-10-28 14:34:08,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:08,613 INFO L93 Difference]: Finished difference Result 258 states and 314 transitions. [2020-10-28 14:34:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:34:08,613 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-28 14:34:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:08,615 INFO L225 Difference]: With dead ends: 258 [2020-10-28 14:34:08,615 INFO L226 Difference]: Without dead ends: 254 [2020-10-28 14:34:08,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:34:08,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-28 14:34:08,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 112. [2020-10-28 14:34:08,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 14:34:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2020-10-28 14:34:08,641 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 34 [2020-10-28 14:34:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:08,641 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2020-10-28 14:34:08,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:34:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2020-10-28 14:34:08,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:34:08,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:08,642 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:08,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:34:08,642 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:08,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:08,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1119835138, now seen corresponding path program 4 times [2020-10-28 14:34:08,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:08,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886488623] [2020-10-28 14:34:08,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:08,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:08,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:09,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:09,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:34:09,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:09,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-28 14:34:09,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:09,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:09,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:34:09,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:34:09,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:34:09,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:09,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:09,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:09,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:09,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:09,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:09,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:09,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:09,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:09,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:09,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:09,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:09,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:09,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886488623] [2020-10-28 14:34:09,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:09,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:34:09,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216152732] [2020-10-28 14:34:09,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:34:09,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:09,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:34:09,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:34:09,295 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand 12 states. [2020-10-28 14:34:10,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:10,062 INFO L93 Difference]: Finished difference Result 238 states and 290 transitions. [2020-10-28 14:34:10,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:34:10,062 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-28 14:34:10,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:10,064 INFO L225 Difference]: With dead ends: 238 [2020-10-28 14:34:10,064 INFO L226 Difference]: Without dead ends: 234 [2020-10-28 14:34:10,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:34:10,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-28 14:34:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 105. [2020-10-28 14:34:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 14:34:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2020-10-28 14:34:10,090 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 34 [2020-10-28 14:34:10,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:10,091 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2020-10-28 14:34:10,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:34:10,091 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2020-10-28 14:34:10,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:34:10,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:10,092 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:10,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:34:10,092 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:10,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:10,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1787710526, now seen corresponding path program 1 times [2020-10-28 14:34:10,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:10,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927692547] [2020-10-28 14:34:10,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:10,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:10,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:10,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:12,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:12,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:34:12,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:34:12,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1935 [2020-10-28 14:34:12,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:12,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:12,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:34:12,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:34:12,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:34:12,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:12,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:12,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:12,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:12,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:12,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:12,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:12,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:12,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:12,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:12,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:12,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:12,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:34:12,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927692547] [2020-10-28 14:34:12,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:12,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:34:12,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544533626] [2020-10-28 14:34:12,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:34:12,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:12,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:34:12,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:34:12,242 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand 10 states. [2020-10-28 14:34:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:12,804 INFO L93 Difference]: Finished difference Result 172 states and 217 transitions. [2020-10-28 14:34:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:34:12,805 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-28 14:34:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:12,807 INFO L225 Difference]: With dead ends: 172 [2020-10-28 14:34:12,807 INFO L226 Difference]: Without dead ends: 168 [2020-10-28 14:34:12,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:34:12,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-28 14:34:12,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 101. [2020-10-28 14:34:12,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 14:34:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2020-10-28 14:34:12,824 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 34 [2020-10-28 14:34:12,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:12,825 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2020-10-28 14:34:12,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:34:12,825 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2020-10-28 14:34:12,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:34:12,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:12,826 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:12,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:34:12,826 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:12,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:12,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1486188416, now seen corresponding path program 2 times [2020-10-28 14:34:12,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:12,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268659131] [2020-10-28 14:34:12,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:12,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:13,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:13,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:34:13,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:13,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-28 14:34:13,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:13,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:13,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:34:13,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:34:13,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:34:13,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:13,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:13,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:13,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:13,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:13,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:13,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:13,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:13,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:13,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:13,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:13,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:13,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:34:13,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268659131] [2020-10-28 14:34:13,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:13,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:34:13,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552565374] [2020-10-28 14:34:13,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:34:13,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:13,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:34:13,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:34:13,190 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand 9 states. [2020-10-28 14:34:13,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:13,777 INFO L93 Difference]: Finished difference Result 149 states and 187 transitions. [2020-10-28 14:34:13,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:34:13,778 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-28 14:34:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:13,779 INFO L225 Difference]: With dead ends: 149 [2020-10-28 14:34:13,779 INFO L226 Difference]: Without dead ends: 145 [2020-10-28 14:34:13,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:34:13,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-28 14:34:13,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 43. [2020-10-28 14:34:13,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 14:34:13,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-28 14:34:13,792 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 34 [2020-10-28 14:34:13,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:13,793 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-28 14:34:13,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:34:13,793 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-28 14:34:13,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:34:13,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:13,794 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:13,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:34:13,794 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:13,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:13,795 INFO L82 PathProgramCache]: Analyzing trace with hash -181247713, now seen corresponding path program 4 times [2020-10-28 14:34:13,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:13,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932606092] [2020-10-28 14:34:13,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:13,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:13,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:13,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:14,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:14,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:14,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:18,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:18,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:34:18,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:34:18,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 14:34:18,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:18,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:18,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:34:18,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:34:18,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:34:18,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:19,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:19,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:19,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:19,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:19,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:19,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:19,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:19,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:19,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:19,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:19,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:19,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:34:19,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932606092] [2020-10-28 14:34:19,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:19,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:34:19,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852820007] [2020-10-28 14:34:19,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:34:19,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:19,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:34:19,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:34:19,099 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 11 states. [2020-10-28 14:34:19,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:19,882 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2020-10-28 14:34:19,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:34:19,882 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-28 14:34:19,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:19,883 INFO L225 Difference]: With dead ends: 123 [2020-10-28 14:34:19,883 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 14:34:19,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:34:19,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 14:34:19,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 54. [2020-10-28 14:34:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 14:34:19,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2020-10-28 14:34:19,895 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 39 [2020-10-28 14:34:19,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:19,896 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2020-10-28 14:34:19,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:34:19,896 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2020-10-28 14:34:19,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:34:19,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:19,898 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:19,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:34:19,898 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:19,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:19,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1870191455, now seen corresponding path program 1 times [2020-10-28 14:34:19,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:19,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148719099] [2020-10-28 14:34:19,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:19,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:19,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:20,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:20,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:20,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:24,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:24,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:34:24,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:34:24,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 14:34:24,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:24,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:24,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:34:24,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:34:24,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:34:24,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:24,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:24,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:24,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:24,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:24,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:24,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:24,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:24,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:24,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:24,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:24,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:24,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 14:34:25,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148719099] [2020-10-28 14:34:25,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:25,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:34:25,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31146792] [2020-10-28 14:34:25,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:34:25,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:25,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:34:25,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:34:25,003 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand 8 states. [2020-10-28 14:34:25,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:25,305 INFO L93 Difference]: Finished difference Result 187 states and 228 transitions. [2020-10-28 14:34:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:34:25,306 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-28 14:34:25,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:25,307 INFO L225 Difference]: With dead ends: 187 [2020-10-28 14:34:25,307 INFO L226 Difference]: Without dead ends: 153 [2020-10-28 14:34:25,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:34:25,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-28 14:34:25,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 72. [2020-10-28 14:34:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 14:34:25,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2020-10-28 14:34:25,320 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 39 [2020-10-28 14:34:25,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:25,321 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2020-10-28 14:34:25,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:34:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2020-10-28 14:34:25,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:34:25,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:25,321 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:25,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:34:25,322 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:25,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:25,322 INFO L82 PathProgramCache]: Analyzing trace with hash -2004204961, now seen corresponding path program 2 times [2020-10-28 14:34:25,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:25,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372927155] [2020-10-28 14:34:25,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:25,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:25,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:25,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:25,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:26,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:26,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:26,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:27,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:27,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:28,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:30,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:30,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:34:30,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 14:34:30,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 14:34:30,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:30,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:30,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:34:30,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:34:30,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:34:30,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:30,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:30,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:30,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:30,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:30,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:30,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:30,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:30,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:30,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:30,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:30,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:30,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:30,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372927155] [2020-10-28 14:34:30,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:30,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:34:30,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172111085] [2020-10-28 14:34:30,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:34:30,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:30,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:34:30,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:34:30,739 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand 13 states. [2020-10-28 14:34:32,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:32,417 INFO L93 Difference]: Finished difference Result 201 states and 248 transitions. [2020-10-28 14:34:32,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 14:34:32,420 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-28 14:34:32,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:32,422 INFO L225 Difference]: With dead ends: 201 [2020-10-28 14:34:32,422 INFO L226 Difference]: Without dead ends: 197 [2020-10-28 14:34:32,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=301, Invalid=959, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:34:32,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-28 14:34:32,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 125. [2020-10-28 14:34:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-28 14:34:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 161 transitions. [2020-10-28 14:34:32,448 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 161 transitions. Word has length 39 [2020-10-28 14:34:32,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:32,448 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 161 transitions. [2020-10-28 14:34:32,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:34:32,449 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 161 transitions. [2020-10-28 14:34:32,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:34:32,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:32,449 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:32,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:34:32,450 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:32,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:32,450 INFO L82 PathProgramCache]: Analyzing trace with hash -119208099, now seen corresponding path program 5 times [2020-10-28 14:34:32,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:32,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915793627] [2020-10-28 14:34:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:32,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:32,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:32,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:32,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:32,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:33,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:35,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:35,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:34:35,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:34:35,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3477 [2020-10-28 14:34:35,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:35,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:35,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:34:35,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:34:35,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:34:35,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:36,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:36,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:36,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:36,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:36,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:36,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:36,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:36,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:36,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:36,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:36,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:36,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:36,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915793627] [2020-10-28 14:34:36,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:36,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:34:36,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089615797] [2020-10-28 14:34:36,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:34:36,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:36,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:34:36,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:34:36,246 INFO L87 Difference]: Start difference. First operand 125 states and 161 transitions. Second operand 12 states. [2020-10-28 14:34:37,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:37,285 INFO L93 Difference]: Finished difference Result 223 states and 277 transitions. [2020-10-28 14:34:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:34:37,286 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-28 14:34:37,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:37,288 INFO L225 Difference]: With dead ends: 223 [2020-10-28 14:34:37,288 INFO L226 Difference]: Without dead ends: 219 [2020-10-28 14:34:37,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:34:37,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-28 14:34:37,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 144. [2020-10-28 14:34:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 14:34:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 190 transitions. [2020-10-28 14:34:37,318 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 190 transitions. Word has length 39 [2020-10-28 14:34:37,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:37,319 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 190 transitions. [2020-10-28 14:34:37,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:34:37,319 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 190 transitions. [2020-10-28 14:34:37,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:34:37,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:37,319 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:37,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:34:37,320 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:37,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:37,320 INFO L82 PathProgramCache]: Analyzing trace with hash 303493727, now seen corresponding path program 6 times [2020-10-28 14:34:37,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:37,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905588228] [2020-10-28 14:34:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:37,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:37,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:37,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:34:37,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:37,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-28 14:34:37,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:37,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:37,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:34:37,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:34:37,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:34:37,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:37,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:37,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:37,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:37,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:37,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:37,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:37,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:37,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:37,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:37,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:37,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:37,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:34:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:37,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905588228] [2020-10-28 14:34:37,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:37,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:34:37,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66540784] [2020-10-28 14:34:37,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:34:37,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:37,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:34:37,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:34:37,801 INFO L87 Difference]: Start difference. First operand 144 states and 190 transitions. Second operand 11 states. [2020-10-28 14:34:39,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:39,025 INFO L93 Difference]: Finished difference Result 228 states and 285 transitions. [2020-10-28 14:34:39,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:34:39,025 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-28 14:34:39,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:39,027 INFO L225 Difference]: With dead ends: 228 [2020-10-28 14:34:39,027 INFO L226 Difference]: Without dead ends: 224 [2020-10-28 14:34:39,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:34:39,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-28 14:34:39,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 152. [2020-10-28 14:34:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-28 14:34:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 202 transitions. [2020-10-28 14:34:39,063 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 202 transitions. Word has length 39 [2020-10-28 14:34:39,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:39,063 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 202 transitions. [2020-10-28 14:34:39,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:34:39,063 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 202 transitions. [2020-10-28 14:34:39,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:34:39,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:39,064 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:39,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:34:39,064 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:39,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:39,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1168591581, now seen corresponding path program 3 times [2020-10-28 14:34:39,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:39,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323071249] [2020-10-28 14:34:39,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:39,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:39,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:39,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:39,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:39,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:39,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:39,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:40,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:40,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:44,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:44,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:34:44,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:34:44,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 14:34:44,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:44,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:44,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:34:44,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:44,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:34:44,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:44,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:44,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:44,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:44,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:44,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:44,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:44,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:44,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:44,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:44,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:44,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:44,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:44,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323071249] [2020-10-28 14:34:44,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:44,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:34:44,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443397824] [2020-10-28 14:34:44,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:34:44,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:44,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:34:44,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:34:44,363 INFO L87 Difference]: Start difference. First operand 152 states and 202 transitions. Second operand 13 states. [2020-10-28 14:34:46,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:46,702 INFO L93 Difference]: Finished difference Result 244 states and 306 transitions. [2020-10-28 14:34:46,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:34:46,703 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-28 14:34:46,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:46,704 INFO L225 Difference]: With dead ends: 244 [2020-10-28 14:34:46,704 INFO L226 Difference]: Without dead ends: 240 [2020-10-28 14:34:46,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:34:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-28 14:34:46,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 150. [2020-10-28 14:34:46,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-28 14:34:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 199 transitions. [2020-10-28 14:34:46,737 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 199 transitions. Word has length 39 [2020-10-28 14:34:46,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:46,737 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 199 transitions. [2020-10-28 14:34:46,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:34:46,737 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 199 transitions. [2020-10-28 14:34:46,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:34:46,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:46,738 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:46,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:34:46,738 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:46,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:46,739 INFO L82 PathProgramCache]: Analyzing trace with hash 943053987, now seen corresponding path program 7 times [2020-10-28 14:34:46,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:46,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827869875] [2020-10-28 14:34:46,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:46,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:46,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:46,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:46,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:47,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:47,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:47,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:47,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:47,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:47,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:47,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:51,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:51,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:34:51,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 14:34:51,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4943 [2020-10-28 14:34:51,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:51,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:51,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:34:51,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:51,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:34:51,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:51,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:51,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:51,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:51,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:51,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:51,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:51,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:51,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:51,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:51,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:51,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:51,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:51,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827869875] [2020-10-28 14:34:51,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:51,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:34:51,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520049526] [2020-10-28 14:34:51,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:34:51,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:51,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:34:51,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:34:51,967 INFO L87 Difference]: Start difference. First operand 150 states and 199 transitions. Second operand 13 states. [2020-10-28 14:34:53,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:53,737 INFO L93 Difference]: Finished difference Result 222 states and 280 transitions. [2020-10-28 14:34:53,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:34:53,738 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-28 14:34:53,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:53,740 INFO L225 Difference]: With dead ends: 222 [2020-10-28 14:34:53,740 INFO L226 Difference]: Without dead ends: 218 [2020-10-28 14:34:53,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:34:53,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-28 14:34:53,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 128. [2020-10-28 14:34:53,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-28 14:34:53,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 167 transitions. [2020-10-28 14:34:53,769 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 167 transitions. Word has length 39 [2020-10-28 14:34:53,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:53,769 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 167 transitions. [2020-10-28 14:34:53,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:34:53,769 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 167 transitions. [2020-10-28 14:34:53,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:53,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:53,770 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:53,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:34:53,770 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:53,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:53,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1824617221, now seen corresponding path program 3 times [2020-10-28 14:34:53,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:53,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231698610] [2020-10-28 14:34:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:53,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:54,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:54,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:54,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:54,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-28 14:34:54,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:54,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:54,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:34:54,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:34:54,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:34:54,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:54,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:54,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:54,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:54,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:54,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:54,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:54,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:54,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:54,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:54,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:54,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:54,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:54,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231698610] [2020-10-28 14:34:54,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:54,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:34:54,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263432986] [2020-10-28 14:34:54,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:34:54,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:54,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:34:54,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:34:54,242 INFO L87 Difference]: Start difference. First operand 128 states and 167 transitions. Second operand 11 states. [2020-10-28 14:34:55,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:55,342 INFO L93 Difference]: Finished difference Result 303 states and 383 transitions. [2020-10-28 14:34:55,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:34:55,342 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-28 14:34:55,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:55,345 INFO L225 Difference]: With dead ends: 303 [2020-10-28 14:34:55,345 INFO L226 Difference]: Without dead ends: 299 [2020-10-28 14:34:55,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:34:55,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-28 14:34:55,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 220. [2020-10-28 14:34:55,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-28 14:34:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 294 transitions. [2020-10-28 14:34:55,392 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 294 transitions. Word has length 41 [2020-10-28 14:34:55,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:55,392 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 294 transitions. [2020-10-28 14:34:55,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:34:55,393 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 294 transitions. [2020-10-28 14:34:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:55,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:55,394 INFO L422 BasicCegarLoop]: trace histogram [4, 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 14:34:55,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:34:55,394 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:55,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:55,394 INFO L82 PathProgramCache]: Analyzing trace with hash 242209915, now seen corresponding path program 1 times [2020-10-28 14:34:55,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:55,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035622343] [2020-10-28 14:34:55,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:55,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:55,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:55,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:55,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:55,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-28 14:34:55,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:55,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:55,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:34:55,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:34:55,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:34:55,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:55,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:55,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:55,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:55,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:55,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:55,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:55,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:55,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:55,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:55,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:55,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:55,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:55,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035622343] [2020-10-28 14:34:55,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:55,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:34:55,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547012868] [2020-10-28 14:34:55,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:34:55,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:55,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:34:55,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:34:55,928 INFO L87 Difference]: Start difference. First operand 220 states and 294 transitions. Second operand 13 states. [2020-10-28 14:34:57,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:57,082 INFO L93 Difference]: Finished difference Result 351 states and 440 transitions. [2020-10-28 14:34:57,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:34:57,083 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-28 14:34:57,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:57,085 INFO L225 Difference]: With dead ends: 351 [2020-10-28 14:34:57,085 INFO L226 Difference]: Without dead ends: 347 [2020-10-28 14:34:57,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:34:57,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-28 14:34:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 232. [2020-10-28 14:34:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-28 14:34:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 312 transitions. [2020-10-28 14:34:57,140 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 312 transitions. Word has length 41 [2020-10-28 14:34:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:57,140 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 312 transitions. [2020-10-28 14:34:57,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:34:57,140 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 312 transitions. [2020-10-28 14:34:57,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:57,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:57,142 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:57,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:34:57,142 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:57,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:57,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1476135545, now seen corresponding path program 1 times [2020-10-28 14:34:57,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:57,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849169762] [2020-10-28 14:34:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:57,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:57,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:57,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:57,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:57,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:57,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:58,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:58,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:58,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:59,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:00,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:02,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:02,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:35:02,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 14:35:02,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 14:35:02,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:02,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:02,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:35:02,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:35:02,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:35:02,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:02,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:02,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:02,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:02,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:02,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:02,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:02,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:02,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:02,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:02,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:02,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:02,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:35:02,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849169762] [2020-10-28 14:35:02,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:02,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:35:02,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129705621] [2020-10-28 14:35:02,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:35:02,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:02,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:35:02,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:35:02,379 INFO L87 Difference]: Start difference. First operand 232 states and 312 transitions. Second operand 11 states. [2020-10-28 14:35:03,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:03,258 INFO L93 Difference]: Finished difference Result 400 states and 496 transitions. [2020-10-28 14:35:03,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:35:03,259 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-28 14:35:03,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:03,262 INFO L225 Difference]: With dead ends: 400 [2020-10-28 14:35:03,262 INFO L226 Difference]: Without dead ends: 339 [2020-10-28 14:35:03,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:35:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-10-28 14:35:03,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 220. [2020-10-28 14:35:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-28 14:35:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 294 transitions. [2020-10-28 14:35:03,310 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 294 transitions. Word has length 41 [2020-10-28 14:35:03,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:03,311 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 294 transitions. [2020-10-28 14:35:03,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:35:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 294 transitions. [2020-10-28 14:35:03,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:35:03,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:03,312 INFO L422 BasicCegarLoop]: trace histogram [4, 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 14:35:03,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:35:03,312 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:03,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1898837371, now seen corresponding path program 2 times [2020-10-28 14:35:03,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:03,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239939405] [2020-10-28 14:35:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:03,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:03,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:03,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:04,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:04,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:35:04,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:04,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1137 [2020-10-28 14:35:04,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:04,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:04,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:35:04,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:35:04,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:35:04,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:04,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:04,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:04,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:04,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:04,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:04,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:04,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:04,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:04,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:04,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:04,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:04,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:04,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239939405] [2020-10-28 14:35:04,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:04,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:35:04,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316220034] [2020-10-28 14:35:04,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:35:04,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:04,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:35:04,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:35:04,759 INFO L87 Difference]: Start difference. First operand 220 states and 294 transitions. Second operand 13 states. [2020-10-28 14:35:06,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:06,539 INFO L93 Difference]: Finished difference Result 393 states and 481 transitions. [2020-10-28 14:35:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:35:06,540 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-28 14:35:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:06,543 INFO L225 Difference]: With dead ends: 393 [2020-10-28 14:35:06,544 INFO L226 Difference]: Without dead ends: 389 [2020-10-28 14:35:06,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:35:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-28 14:35:06,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 224. [2020-10-28 14:35:06,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-28 14:35:06,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 300 transitions. [2020-10-28 14:35:06,593 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 300 transitions. Word has length 41 [2020-10-28 14:35:06,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:06,593 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 300 transitions. [2020-10-28 14:35:06,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:35:06,593 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 300 transitions. [2020-10-28 14:35:06,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:35:06,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:06,594 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:06,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:35:06,594 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:06,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:06,595 INFO L82 PathProgramCache]: Analyzing trace with hash -329302789, now seen corresponding path program 2 times [2020-10-28 14:35:06,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:06,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271480783] [2020-10-28 14:35:06,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:06,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:06,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:06,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:06,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:06,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:06,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:06,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:07,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:07,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:07,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:11,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:11,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:35:11,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 14:35:11,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 14:35:11,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:11,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:11,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:35:11,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:35:11,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:35:11,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:12,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:12,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:12,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:12,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:12,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:12,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:12,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:12,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:12,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:12,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:12,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:12,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:12,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271480783] [2020-10-28 14:35:12,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:12,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:35:12,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457333314] [2020-10-28 14:35:12,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:35:12,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:12,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:35:12,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:35:12,100 INFO L87 Difference]: Start difference. First operand 224 states and 300 transitions. Second operand 15 states. [2020-10-28 14:35:13,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:13,558 INFO L93 Difference]: Finished difference Result 350 states and 433 transitions. [2020-10-28 14:35:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:35:13,559 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:35:13,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:13,562 INFO L225 Difference]: With dead ends: 350 [2020-10-28 14:35:13,562 INFO L226 Difference]: Without dead ends: 346 [2020-10-28 14:35:13,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:35:13,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-28 14:35:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 222. [2020-10-28 14:35:13,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-28 14:35:13,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 297 transitions. [2020-10-28 14:35:13,606 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 297 transitions. Word has length 41 [2020-10-28 14:35:13,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:13,606 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 297 transitions. [2020-10-28 14:35:13,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:35:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 297 transitions. [2020-10-28 14:35:13,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:35:13,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:13,607 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:13,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:35:13,608 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:13,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:13,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1185056961, now seen corresponding path program 4 times [2020-10-28 14:35:13,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:13,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608917503] [2020-10-28 14:35:13,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:13,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:13,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:13,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:13,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:14,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:15,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:15,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:35:15,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:35:15,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1736 [2020-10-28 14:35:15,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:15,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:15,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:35:15,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:15,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:35:15,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:15,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:15,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:15,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:15,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:15,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:15,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:15,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:15,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:15,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:15,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:15,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:15,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-28 14:35:15,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608917503] [2020-10-28 14:35:15,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:15,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:35:15,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665133875] [2020-10-28 14:35:15,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:35:15,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:15,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:35:15,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:35:15,497 INFO L87 Difference]: Start difference. First operand 222 states and 297 transitions. Second operand 10 states. [2020-10-28 14:35:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:16,155 INFO L93 Difference]: Finished difference Result 784 states and 1021 transitions. [2020-10-28 14:35:16,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:35:16,156 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-28 14:35:16,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:16,159 INFO L225 Difference]: With dead ends: 784 [2020-10-28 14:35:16,159 INFO L226 Difference]: Without dead ends: 638 [2020-10-28 14:35:16,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:35:16,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-10-28 14:35:16,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 340. [2020-10-28 14:35:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-28 14:35:16,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 472 transitions. [2020-10-28 14:35:16,265 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 472 transitions. Word has length 41 [2020-10-28 14:35:16,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:16,265 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 472 transitions. [2020-10-28 14:35:16,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:35:16,265 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 472 transitions. [2020-10-28 14:35:16,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:35:16,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:16,267 INFO L422 BasicCegarLoop]: trace histogram [4, 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 14:35:16,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:35:16,267 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:16,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:16,268 INFO L82 PathProgramCache]: Analyzing trace with hash 881770175, now seen corresponding path program 3 times [2020-10-28 14:35:16,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:16,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156762589] [2020-10-28 14:35:16,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:16,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:16,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:16,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:16,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:16,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:17,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:17,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:17,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:17,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:21,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:21,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:35:21,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:35:21,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 14:35:21,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:21,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:21,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:35:21,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:35:21,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:35:21,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:21,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:21,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:21,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:21,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:21,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:21,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:21,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:21,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:21,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 14:35:21,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156762589] [2020-10-28 14:35:21,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:21,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:35:21,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034697044] [2020-10-28 14:35:21,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:35:21,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:21,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:35:21,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:35:21,394 INFO L87 Difference]: Start difference. First operand 340 states and 472 transitions. Second operand 9 states. [2020-10-28 14:35:21,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:21,816 INFO L93 Difference]: Finished difference Result 684 states and 906 transitions. [2020-10-28 14:35:21,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:35:21,817 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-28 14:35:21,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:21,819 INFO L225 Difference]: With dead ends: 684 [2020-10-28 14:35:21,820 INFO L226 Difference]: Without dead ends: 498 [2020-10-28 14:35:21,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:35:21,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-10-28 14:35:21,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 345. [2020-10-28 14:35:21,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-28 14:35:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 476 transitions. [2020-10-28 14:35:21,909 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 476 transitions. Word has length 41 [2020-10-28 14:35:21,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:21,909 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 476 transitions. [2020-10-28 14:35:21,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:35:21,909 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 476 transitions. [2020-10-28 14:35:21,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:35:21,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:21,911 INFO L422 BasicCegarLoop]: trace histogram [4, 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 14:35:21,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:35:21,911 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:21,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:21,912 INFO L82 PathProgramCache]: Analyzing trace with hash 943809789, now seen corresponding path program 4 times [2020-10-28 14:35:21,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:21,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291153929] [2020-10-28 14:35:21,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:21,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:22,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:22,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:35:22,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:22,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-28 14:35:22,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:22,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:22,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:35:22,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:35:22,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:35:22,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:22,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:22,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:22,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:22,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:22,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:22,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:22,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:22,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:22,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:22,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:22,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:22,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:22,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291153929] [2020-10-28 14:35:22,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:22,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:35:22,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636824077] [2020-10-28 14:35:22,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:35:22,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:22,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:35:22,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:35:22,643 INFO L87 Difference]: Start difference. First operand 345 states and 476 transitions. Second operand 14 states. [2020-10-28 14:35:23,809 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-10-28 14:35:24,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:24,438 INFO L93 Difference]: Finished difference Result 369 states and 501 transitions. [2020-10-28 14:35:24,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:35:24,438 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-28 14:35:24,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:24,441 INFO L225 Difference]: With dead ends: 369 [2020-10-28 14:35:24,441 INFO L226 Difference]: Without dead ends: 365 [2020-10-28 14:35:24,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:35:24,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-28 14:35:24,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 204. [2020-10-28 14:35:24,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-28 14:35:24,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 273 transitions. [2020-10-28 14:35:24,483 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 273 transitions. Word has length 41 [2020-10-28 14:35:24,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:24,483 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 273 transitions. [2020-10-28 14:35:24,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:35:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 273 transitions. [2020-10-28 14:35:24,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:35:24,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:24,484 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:24,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:35:24,484 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:24,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:24,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1998507874, now seen corresponding path program 3 times [2020-10-28 14:35:24,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:24,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302627380] [2020-10-28 14:35:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:24,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:24,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:24,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:35:24,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:24,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-28 14:35:24,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:24,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:24,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:35:24,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:24,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:35:24,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:24,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:24,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:24,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:24,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:24,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:24,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:24,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:24,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:24,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:24,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:24,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:24,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:24,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302627380] [2020-10-28 14:35:24,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:24,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:35:24,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535614952] [2020-10-28 14:35:24,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:35:24,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:24,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:35:24,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:35:24,902 INFO L87 Difference]: Start difference. First operand 204 states and 273 transitions. Second operand 11 states. [2020-10-28 14:35:25,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:25,365 INFO L93 Difference]: Finished difference Result 304 states and 408 transitions. [2020-10-28 14:35:25,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:35:25,366 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-28 14:35:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:25,368 INFO L225 Difference]: With dead ends: 304 [2020-10-28 14:35:25,368 INFO L226 Difference]: Without dead ends: 277 [2020-10-28 14:35:25,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:35:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-28 14:35:25,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 269. [2020-10-28 14:35:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-28 14:35:25,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 358 transitions. [2020-10-28 14:35:25,421 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 358 transitions. Word has length 44 [2020-10-28 14:35:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:25,421 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 358 transitions. [2020-10-28 14:35:25,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:35:25,422 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 358 transitions. [2020-10-28 14:35:25,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:35:25,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:25,422 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:25,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:35:25,423 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:25,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:25,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1355248387, now seen corresponding path program 4 times [2020-10-28 14:35:25,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:25,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351894106] [2020-10-28 14:35:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:25,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:25,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:25,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:25,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:35:25,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:25,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-28 14:35:25,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:25,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:25,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:35:25,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:35:25,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:35:25,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:26,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:26,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:26,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:26,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:26,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:26,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:26,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:26,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:26,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:26,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:26,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:26,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:26,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351894106] [2020-10-28 14:35:26,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:26,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:35:26,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433647969] [2020-10-28 14:35:26,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:35:26,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:26,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:35:26,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:35:26,226 INFO L87 Difference]: Start difference. First operand 269 states and 358 transitions. Second operand 15 states. [2020-10-28 14:35:27,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:27,531 INFO L93 Difference]: Finished difference Result 521 states and 660 transitions. [2020-10-28 14:35:27,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:35:27,532 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-28 14:35:27,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:27,535 INFO L225 Difference]: With dead ends: 521 [2020-10-28 14:35:27,535 INFO L226 Difference]: Without dead ends: 517 [2020-10-28 14:35:27,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:35:27,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-10-28 14:35:27,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 314. [2020-10-28 14:35:27,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-10-28 14:35:27,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 424 transitions. [2020-10-28 14:35:27,609 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 424 transitions. Word has length 44 [2020-10-28 14:35:27,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:27,609 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 424 transitions. [2020-10-28 14:35:27,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:35:27,610 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 424 transitions. [2020-10-28 14:35:27,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:35:27,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:27,610 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:27,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:35:27,611 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:27,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:27,611 INFO L82 PathProgramCache]: Analyzing trace with hash -828073341, now seen corresponding path program 8 times [2020-10-28 14:35:27,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:27,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929219380] [2020-10-28 14:35:27,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:27,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:27,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:27,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:27,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:35:27,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:27,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-28 14:35:27,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:27,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:27,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:35:27,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:35:27,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:35:27,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:28,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:28,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:28,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:28,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:28,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:28,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:28,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:28,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:28,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:28,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:28,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:28,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:28,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929219380] [2020-10-28 14:35:28,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:28,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:35:28,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612007964] [2020-10-28 14:35:28,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:35:28,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:28,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:35:28,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:35:28,266 INFO L87 Difference]: Start difference. First operand 314 states and 424 transitions. Second operand 14 states. [2020-10-28 14:35:29,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:29,556 INFO L93 Difference]: Finished difference Result 523 states and 664 transitions. [2020-10-28 14:35:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:35:29,557 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-28 14:35:29,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:29,559 INFO L225 Difference]: With dead ends: 523 [2020-10-28 14:35:29,559 INFO L226 Difference]: Without dead ends: 519 [2020-10-28 14:35:29,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:35:29,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2020-10-28 14:35:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 335. [2020-10-28 14:35:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-10-28 14:35:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 453 transitions. [2020-10-28 14:35:29,655 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 453 transitions. Word has length 44 [2020-10-28 14:35:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:29,655 INFO L481 AbstractCegarLoop]: Abstraction has 335 states and 453 transitions. [2020-10-28 14:35:29,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:35:29,655 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 453 transitions. [2020-10-28 14:35:29,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:35:29,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:29,657 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:29,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:35:29,657 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:29,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:29,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1553515515, now seen corresponding path program 5 times [2020-10-28 14:35:29,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:29,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724258729] [2020-10-28 14:35:29,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:29,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:30,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:30,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:35:30,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:30,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-28 14:35:30,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:30,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:30,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:35:30,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:35:30,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:35:30,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:30,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:30,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:30,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:30,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:30,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:30,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:30,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:30,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:30,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:30,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:30,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:30,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:35:30,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724258729] [2020-10-28 14:35:30,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:30,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:35:30,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278560796] [2020-10-28 14:35:30,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:35:30,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:30,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:35:30,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:35:30,284 INFO L87 Difference]: Start difference. First operand 335 states and 453 transitions. Second operand 12 states. [2020-10-28 14:35:31,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:31,403 INFO L93 Difference]: Finished difference Result 478 states and 627 transitions. [2020-10-28 14:35:31,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:35:31,404 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-28 14:35:31,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:31,407 INFO L225 Difference]: With dead ends: 478 [2020-10-28 14:35:31,407 INFO L226 Difference]: Without dead ends: 474 [2020-10-28 14:35:31,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:35:31,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-10-28 14:35:31,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 323. [2020-10-28 14:35:31,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-28 14:35:31,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 437 transitions. [2020-10-28 14:35:31,483 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 437 transitions. Word has length 44 [2020-10-28 14:35:31,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:31,483 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 437 transitions. [2020-10-28 14:35:31,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:35:31,484 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 437 transitions. [2020-10-28 14:35:31,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:35:31,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:31,484 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:31,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:35:31,485 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:31,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:31,485 INFO L82 PathProgramCache]: Analyzing trace with hash 558130053, now seen corresponding path program 6 times [2020-10-28 14:35:31,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:31,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281960738] [2020-10-28 14:35:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:31,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:31,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:31,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:35:31,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:31,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-28 14:35:31,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:31,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:31,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:35:31,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:35:31,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:35:31,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:31,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:31,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:31,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:31,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:31,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:31,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:31,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:31,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:31,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:31,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:31,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:31,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:35:31,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281960738] [2020-10-28 14:35:31,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:31,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:35:31,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457771991] [2020-10-28 14:35:31,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:35:31,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:31,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:35:31,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:35:31,908 INFO L87 Difference]: Start difference. First operand 323 states and 437 transitions. Second operand 11 states. [2020-10-28 14:35:33,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:33,171 INFO L93 Difference]: Finished difference Result 415 states and 543 transitions. [2020-10-28 14:35:33,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:35:33,172 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-28 14:35:33,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:33,174 INFO L225 Difference]: With dead ends: 415 [2020-10-28 14:35:33,174 INFO L226 Difference]: Without dead ends: 411 [2020-10-28 14:35:33,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:35:33,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-28 14:35:33,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 156. [2020-10-28 14:35:33,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 14:35:33,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 203 transitions. [2020-10-28 14:35:33,206 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 203 transitions. Word has length 44 [2020-10-28 14:35:33,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:33,206 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 203 transitions. [2020-10-28 14:35:33,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:35:33,206 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 203 transitions. [2020-10-28 14:35:33,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:35:33,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:33,207 INFO L422 BasicCegarLoop]: trace histogram [5, 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 14:35:33,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:35:33,207 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:33,208 INFO L82 PathProgramCache]: Analyzing trace with hash 432805498, now seen corresponding path program 4 times [2020-10-28 14:35:33,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:33,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597626863] [2020-10-28 14:35:33,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:33,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:33,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:33,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:33,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:33,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:34,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:38,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:38,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:35:38,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:35:38,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 14:35:38,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:38,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:38,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:35:38,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:35:38,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:35:38,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:39,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:39,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:39,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:39,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:39,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:39,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:35:39,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:39,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:39,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:39,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:39,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:39,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:39,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597626863] [2020-10-28 14:35:39,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:39,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:35:39,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628623539] [2020-10-28 14:35:39,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:35:39,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:39,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:35:39,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:35:39,075 INFO L87 Difference]: Start difference. First operand 156 states and 203 transitions. Second operand 17 states. [2020-10-28 14:35:40,688 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-10-28 14:35:40,896 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-28 14:35:41,871 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-28 14:35:42,034 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-28 14:35:42,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:42,865 INFO L93 Difference]: Finished difference Result 417 states and 523 transitions. [2020-10-28 14:35:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 14:35:42,866 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-28 14:35:42,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:42,868 INFO L225 Difference]: With dead ends: 417 [2020-10-28 14:35:42,868 INFO L226 Difference]: Without dead ends: 413 [2020-10-28 14:35:42,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=225, Invalid=1415, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 14:35:42,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-28 14:35:42,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 250. [2020-10-28 14:35:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-28 14:35:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 327 transitions. [2020-10-28 14:35:42,947 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 327 transitions. Word has length 49 [2020-10-28 14:35:42,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:42,947 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 327 transitions. [2020-10-28 14:35:42,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:35:42,947 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 327 transitions. [2020-10-28 14:35:42,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:35:42,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:42,949 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:42,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:35:42,949 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:42,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:42,949 INFO L82 PathProgramCache]: Analyzing trace with hash -251798022, now seen corresponding path program 7 times [2020-10-28 14:35:42,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:42,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625240611] [2020-10-28 14:35:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:42,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:43,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:43,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:43,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:45,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:45,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:35:45,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:35:45,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2059 [2020-10-28 14:35:45,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:45,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:45,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:35:45,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:35:45,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:35:45,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:45,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:45,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:45,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:45,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:45,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:45,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:45,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:45,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:45,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:45,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:45,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:45,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:45,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625240611] [2020-10-28 14:35:45,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:45,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:35:45,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983304573] [2020-10-28 14:35:45,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:35:45,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:45,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:35:45,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:35:45,622 INFO L87 Difference]: Start difference. First operand 250 states and 327 transitions. Second operand 17 states. [2020-10-28 14:35:47,221 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-28 14:35:48,356 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2020-10-28 14:35:49,760 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-10-28 14:35:50,435 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2020-10-28 14:35:51,073 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-10-28 14:35:51,505 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2020-10-28 14:35:52,430 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-28 14:35:52,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:52,715 INFO L93 Difference]: Finished difference Result 796 states and 971 transitions. [2020-10-28 14:35:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-28 14:35:52,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-28 14:35:52,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:52,718 INFO L225 Difference]: With dead ends: 796 [2020-10-28 14:35:52,718 INFO L226 Difference]: Without dead ends: 792 [2020-10-28 14:35:52,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=737, Invalid=4233, Unknown=0, NotChecked=0, Total=4970 [2020-10-28 14:35:52,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2020-10-28 14:35:52,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 344. [2020-10-28 14:35:52,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-28 14:35:52,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 465 transitions. [2020-10-28 14:35:52,794 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 465 transitions. Word has length 49 [2020-10-28 14:35:52,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:52,795 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 465 transitions. [2020-10-28 14:35:52,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:35:52,795 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 465 transitions. [2020-10-28 14:35:52,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:35:52,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:52,796 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:52,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:35:52,796 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:52,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:52,796 INFO L82 PathProgramCache]: Analyzing trace with hash -55744902, now seen corresponding path program 8 times [2020-10-28 14:35:52,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:52,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095739276] [2020-10-28 14:35:52,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:52,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:52,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:53,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:53,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:53,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:35:53,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:53,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1076 [2020-10-28 14:35:53,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:53,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:53,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:35:53,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:35:53,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:35:53,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:54,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:54,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:54,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:54,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:54,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:54,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:54,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:54,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:54,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:54,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:54,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:54,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:54,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095739276] [2020-10-28 14:35:54,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:54,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:35:54,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771249193] [2020-10-28 14:35:54,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:35:54,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:54,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:35:54,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:35:54,381 INFO L87 Difference]: Start difference. First operand 344 states and 465 transitions. Second operand 16 states. [2020-10-28 14:35:56,092 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-28 14:35:56,268 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2020-10-28 14:35:56,416 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-28 14:35:56,582 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-28 14:35:56,724 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-28 14:35:57,516 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-28 14:35:57,837 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-10-28 14:35:58,037 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-28 14:35:58,186 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-28 14:35:58,602 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-28 14:35:58,728 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-28 14:35:59,038 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-28 14:35:59,354 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-28 14:35:59,961 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-28 14:36:00,122 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-28 14:36:00,257 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-28 14:36:01,373 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-28 14:36:01,522 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-28 14:36:02,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:02,545 INFO L93 Difference]: Finished difference Result 761 states and 959 transitions. [2020-10-28 14:36:02,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-28 14:36:02,546 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-28 14:36:02,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:02,550 INFO L225 Difference]: With dead ends: 761 [2020-10-28 14:36:02,550 INFO L226 Difference]: Without dead ends: 757 [2020-10-28 14:36:02,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=693, Invalid=4709, Unknown=0, NotChecked=0, Total=5402 [2020-10-28 14:36:02,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2020-10-28 14:36:02,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 396. [2020-10-28 14:36:02,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-10-28 14:36:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 544 transitions. [2020-10-28 14:36:02,696 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 544 transitions. Word has length 49 [2020-10-28 14:36:02,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:02,697 INFO L481 AbstractCegarLoop]: Abstraction has 396 states and 544 transitions. [2020-10-28 14:36:02,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:36:02,697 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 544 transitions. [2020-10-28 14:36:02,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:36:02,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:02,698 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:02,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:36:02,699 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:02,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:02,699 INFO L82 PathProgramCache]: Analyzing trace with hash 896218616, now seen corresponding path program 9 times [2020-10-28 14:36:02,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:02,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168555209] [2020-10-28 14:36:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:02,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:02,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:02,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:03,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:03,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:03,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:04,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:04,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:04,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:06,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:07,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:07,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:36:07,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 14:36:07,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 14:36:07,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:07,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:07,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:36:07,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:36:07,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:36:07,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:08,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:08,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:08,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:08,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:08,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:08,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:36:08,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:08,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:08,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:08,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:08,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:08,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:36:08,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168555209] [2020-10-28 14:36:08,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:08,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:36:08,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718483272] [2020-10-28 14:36:08,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:36:08,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:08,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:36:08,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:36:08,057 INFO L87 Difference]: Start difference. First operand 396 states and 544 transitions. Second operand 13 states. [2020-10-28 14:36:10,013 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-28 14:36:10,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:10,211 INFO L93 Difference]: Finished difference Result 582 states and 750 transitions. [2020-10-28 14:36:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:36:10,212 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-28 14:36:10,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:10,214 INFO L225 Difference]: With dead ends: 582 [2020-10-28 14:36:10,215 INFO L226 Difference]: Without dead ends: 524 [2020-10-28 14:36:10,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:36:10,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-10-28 14:36:10,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 397. [2020-10-28 14:36:10,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-10-28 14:36:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 543 transitions. [2020-10-28 14:36:10,331 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 543 transitions. Word has length 49 [2020-10-28 14:36:10,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:10,331 INFO L481 AbstractCegarLoop]: Abstraction has 397 states and 543 transitions. [2020-10-28 14:36:10,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:36:10,331 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 543 transitions. [2020-10-28 14:36:10,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:36:10,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:10,333 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:10,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 14:36:10,333 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:10,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:10,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1092271736, now seen corresponding path program 9 times [2020-10-28 14:36:10,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:10,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176646822] [2020-10-28 14:36:10,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:10,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:10,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:10,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:10,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:13,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:13,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:36:13,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:36:13,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2973 [2020-10-28 14:36:13,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:13,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:13,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:36:13,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:36:13,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:36:13,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:13,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:13,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:13,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:13,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:13,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:13,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:13,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:13,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:13,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:13,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:13,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:13,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-28 14:36:13,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176646822] [2020-10-28 14:36:13,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:13,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:36:13,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525198793] [2020-10-28 14:36:13,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:36:13,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:13,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:36:13,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:36:13,450 INFO L87 Difference]: Start difference. First operand 397 states and 543 transitions. Second operand 10 states. [2020-10-28 14:36:14,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:14,087 INFO L93 Difference]: Finished difference Result 905 states and 1215 transitions. [2020-10-28 14:36:14,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:36:14,088 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-10-28 14:36:14,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:14,090 INFO L225 Difference]: With dead ends: 905 [2020-10-28 14:36:14,090 INFO L226 Difference]: Without dead ends: 694 [2020-10-28 14:36:14,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:36:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-10-28 14:36:14,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 451. [2020-10-28 14:36:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-10-28 14:36:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 623 transitions. [2020-10-28 14:36:14,230 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 623 transitions. Word has length 49 [2020-10-28 14:36:14,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:14,231 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 623 transitions. [2020-10-28 14:36:14,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:36:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 623 transitions. [2020-10-28 14:36:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:36:14,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:14,233 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:14,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 14:36:14,233 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:14,233 INFO L82 PathProgramCache]: Analyzing trace with hash -2012545286, now seen corresponding path program 10 times [2020-10-28 14:36:14,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:14,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603367289] [2020-10-28 14:36:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:14,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:14,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:15,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:15,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:36:15,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:36:15,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 903 [2020-10-28 14:36:15,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:15,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:15,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:36:15,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:36:15,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:36:15,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:15,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:15,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:15,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:15,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:15,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:15,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:36:15,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:15,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:15,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:15,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:15,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:15,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:15,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603367289] [2020-10-28 14:36:15,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:15,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:36:15,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632943514] [2020-10-28 14:36:15,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:36:15,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:15,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:36:15,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:36:15,735 INFO L87 Difference]: Start difference. First operand 451 states and 623 transitions. Second operand 15 states. [2020-10-28 14:36:17,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:17,856 INFO L93 Difference]: Finished difference Result 789 states and 1031 transitions. [2020-10-28 14:36:17,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:36:17,857 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-28 14:36:17,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:17,860 INFO L225 Difference]: With dead ends: 789 [2020-10-28 14:36:17,860 INFO L226 Difference]: Without dead ends: 785 [2020-10-28 14:36:17,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:36:17,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-10-28 14:36:17,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 509. [2020-10-28 14:36:17,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2020-10-28 14:36:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 708 transitions. [2020-10-28 14:36:17,976 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 708 transitions. Word has length 49 [2020-10-28 14:36:17,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:17,976 INFO L481 AbstractCegarLoop]: Abstraction has 509 states and 708 transitions. [2020-10-28 14:36:17,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:36:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 708 transitions. [2020-10-28 14:36:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:36:17,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:17,978 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:17,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 14:36:17,978 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:17,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:17,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1816492166, now seen corresponding path program 11 times [2020-10-28 14:36:17,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:17,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016567813] [2020-10-28 14:36:17,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:18,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:18,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:18,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:36:18,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:18,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-28 14:36:18,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:18,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:18,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:36:18,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:36:18,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:36:18,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:18,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:18,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:18,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:18,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:18,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:18,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:18,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:18,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:18,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:18,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:18,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:18,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:18,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016567813] [2020-10-28 14:36:18,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:18,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:36:18,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757374786] [2020-10-28 14:36:18,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:36:18,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:18,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:36:18,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:36:18,944 INFO L87 Difference]: Start difference. First operand 509 states and 708 transitions. Second operand 14 states. [2020-10-28 14:36:21,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:21,340 INFO L93 Difference]: Finished difference Result 811 states and 1067 transitions. [2020-10-28 14:36:21,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:36:21,341 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-28 14:36:21,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:21,344 INFO L225 Difference]: With dead ends: 811 [2020-10-28 14:36:21,344 INFO L226 Difference]: Without dead ends: 807 [2020-10-28 14:36:21,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:36:21,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2020-10-28 14:36:21,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 567. [2020-10-28 14:36:21,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2020-10-28 14:36:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 788 transitions. [2020-10-28 14:36:21,502 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 788 transitions. Word has length 49 [2020-10-28 14:36:21,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:21,502 INFO L481 AbstractCegarLoop]: Abstraction has 567 states and 788 transitions. [2020-10-28 14:36:21,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:36:21,502 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 788 transitions. [2020-10-28 14:36:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:36:21,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:21,504 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:21,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 14:36:21,504 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:21,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:21,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1597818490, now seen corresponding path program 12 times [2020-10-28 14:36:21,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:21,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828406920] [2020-10-28 14:36:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:21,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:21,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:21,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:36:21,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:21,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-28 14:36:21,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:21,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:21,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:36:21,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:36:21,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:36:21,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:22,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:22,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:22,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:22,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:22,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:22,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:36:22,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:22,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:22,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:22,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:22,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:22,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:22,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828406920] [2020-10-28 14:36:22,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:22,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:36:22,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463912938] [2020-10-28 14:36:22,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:36:22,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:22,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:36:22,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:36:22,234 INFO L87 Difference]: Start difference. First operand 567 states and 788 transitions. Second operand 14 states. [2020-10-28 14:36:24,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:24,274 INFO L93 Difference]: Finished difference Result 864 states and 1150 transitions. [2020-10-28 14:36:24,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:36:24,275 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-28 14:36:24,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:24,279 INFO L225 Difference]: With dead ends: 864 [2020-10-28 14:36:24,279 INFO L226 Difference]: Without dead ends: 860 [2020-10-28 14:36:24,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:36:24,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-10-28 14:36:24,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 625. [2020-10-28 14:36:24,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2020-10-28 14:36:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 878 transitions. [2020-10-28 14:36:24,422 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 878 transitions. Word has length 49 [2020-10-28 14:36:24,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:24,422 INFO L481 AbstractCegarLoop]: Abstraction has 625 states and 878 transitions. [2020-10-28 14:36:24,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:36:24,422 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 878 transitions. [2020-10-28 14:36:24,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:36:24,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:24,424 INFO L422 BasicCegarLoop]: trace histogram [5, 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 14:36:24,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 14:36:24,425 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:24,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:24,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1793871610, now seen corresponding path program 10 times [2020-10-28 14:36:24,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:24,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426605543] [2020-10-28 14:36:24,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:24,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:24,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:24,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:36:24,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:24,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-28 14:36:24,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:24,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:24,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:36:24,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:36:24,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:36:24,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:25,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:25,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:25,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:25,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:25,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:25,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:36:25,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:25,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:25,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:25,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:25,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:25,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:25,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426605543] [2020-10-28 14:36:25,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:25,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:36:25,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376409161] [2020-10-28 14:36:25,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:36:25,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:25,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:36:25,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:36:25,117 INFO L87 Difference]: Start difference. First operand 625 states and 878 transitions. Second operand 13 states. [2020-10-28 14:36:27,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:27,548 INFO L93 Difference]: Finished difference Result 863 states and 1165 transitions. [2020-10-28 14:36:27,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:36:27,549 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-28 14:36:27,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:27,552 INFO L225 Difference]: With dead ends: 863 [2020-10-28 14:36:27,552 INFO L226 Difference]: Without dead ends: 859 [2020-10-28 14:36:27,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:36:27,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-10-28 14:36:27,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 691. [2020-10-28 14:36:27,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-10-28 14:36:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 975 transitions. [2020-10-28 14:36:27,743 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 975 transitions. Word has length 49 [2020-10-28 14:36:27,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:27,743 INFO L481 AbstractCegarLoop]: Abstraction has 691 states and 975 transitions. [2020-10-28 14:36:27,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:36:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 975 transitions. [2020-10-28 14:36:27,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:36:27,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:27,745 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:27,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 14:36:27,745 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:27,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:27,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1901112068, now seen corresponding path program 13 times [2020-10-28 14:36:27,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:27,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633663095] [2020-10-28 14:36:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:27,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:28,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:28,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:36:28,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:28,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-28 14:36:28,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:28,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:28,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:36:28,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:36:28,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:36:28,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:28,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:28,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:28,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:28,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:28,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:28,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:28,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:28,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:28,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:28,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:28,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:28,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:28,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633663095] [2020-10-28 14:36:28,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:28,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:36:28,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864558893] [2020-10-28 14:36:28,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:36:28,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:28,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:36:28,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:36:28,522 INFO L87 Difference]: Start difference. First operand 691 states and 975 transitions. Second operand 14 states. [2020-10-28 14:36:29,494 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-28 14:36:29,678 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-28 14:36:30,159 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-28 14:36:30,316 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-28 14:36:30,661 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-28 14:36:31,118 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-10-28 14:36:31,270 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-28 14:36:31,574 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-28 14:36:31,894 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-10-28 14:36:32,147 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-28 14:36:32,409 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-28 14:36:32,564 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-28 14:36:32,795 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-28 14:36:33,101 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-28 14:36:33,241 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-28 14:36:33,377 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-28 14:36:33,693 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-28 14:36:34,074 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-28 14:36:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:34,450 INFO L93 Difference]: Finished difference Result 1171 states and 1544 transitions. [2020-10-28 14:36:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 14:36:34,451 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-28 14:36:34,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:34,454 INFO L225 Difference]: With dead ends: 1171 [2020-10-28 14:36:34,455 INFO L226 Difference]: Without dead ends: 1167 [2020-10-28 14:36:34,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=559, Invalid=2197, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 14:36:34,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2020-10-28 14:36:34,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 761. [2020-10-28 14:36:34,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2020-10-28 14:36:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1074 transitions. [2020-10-28 14:36:34,696 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1074 transitions. Word has length 49 [2020-10-28 14:36:34,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:34,696 INFO L481 AbstractCegarLoop]: Abstraction has 761 states and 1074 transitions. [2020-10-28 14:36:34,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:36:34,696 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1074 transitions. [2020-10-28 14:36:34,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:36:34,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:34,698 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:34,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 14:36:34,698 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:34,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:34,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1194531778, now seen corresponding path program 14 times [2020-10-28 14:36:34,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:34,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880932093] [2020-10-28 14:36:34,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:34,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:34,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:34,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:34,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:35,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:35,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:35,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:36,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:37,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:37,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:37,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:37,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:38,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:38,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:38,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:38,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:39,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:39,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:36:39,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 14:36:39,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 14:36:39,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:39,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:39,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:36:39,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:39,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:36:39,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:39,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:39,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:39,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:39,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:39,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:39,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:36:39,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:39,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:39,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:39,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:39,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:39,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 14:36:39,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880932093] [2020-10-28 14:36:39,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:39,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:36:39,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159101166] [2020-10-28 14:36:39,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:36:39,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:39,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:36:39,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:36:39,836 INFO L87 Difference]: Start difference. First operand 761 states and 1074 transitions. Second operand 9 states. [2020-10-28 14:36:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:40,637 INFO L93 Difference]: Finished difference Result 1489 states and 2081 transitions. [2020-10-28 14:36:40,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:36:40,638 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-10-28 14:36:40,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:40,641 INFO L225 Difference]: With dead ends: 1489 [2020-10-28 14:36:40,641 INFO L226 Difference]: Without dead ends: 1019 [2020-10-28 14:36:40,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:36:40,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2020-10-28 14:36:40,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 866. [2020-10-28 14:36:40,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 866 states. [2020-10-28 14:36:40,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1206 transitions. [2020-10-28 14:36:40,876 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1206 transitions. Word has length 49 [2020-10-28 14:36:40,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:40,877 INFO L481 AbstractCegarLoop]: Abstraction has 866 states and 1206 transitions. [2020-10-28 14:36:40,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:36:40,877 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1206 transitions. [2020-10-28 14:36:40,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:36:40,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:40,879 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:40,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 14:36:40,879 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:40,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:40,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1163685308, now seen corresponding path program 15 times [2020-10-28 14:36:40,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:40,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020279973] [2020-10-28 14:36:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:40,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:41,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:41,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:41,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:41,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:42,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:42,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:42,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:42,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:45,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:45,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:36:45,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 14:36:45,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 14:36:45,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:45,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:45,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:36:45,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:45,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:36:45,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:46,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:46,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:46,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:46,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:46,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:46,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:46,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:46,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:46,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:46,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:46,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:46,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020279973] [2020-10-28 14:36:46,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:46,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:36:46,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374777470] [2020-10-28 14:36:46,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:36:46,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:46,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:36:46,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:36:46,547 INFO L87 Difference]: Start difference. First operand 866 states and 1206 transitions. Second operand 16 states. [2020-10-28 14:36:52,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:52,954 INFO L93 Difference]: Finished difference Result 1153 states and 1551 transitions. [2020-10-28 14:36:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-28 14:36:52,955 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-28 14:36:52,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:52,961 INFO L225 Difference]: With dead ends: 1153 [2020-10-28 14:36:52,962 INFO L226 Difference]: Without dead ends: 1149 [2020-10-28 14:36:52,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=644, Invalid=3516, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 14:36:52,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-10-28 14:36:53,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 869. [2020-10-28 14:36:53,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 869 states. [2020-10-28 14:36:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1216 transitions. [2020-10-28 14:36:53,208 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1216 transitions. Word has length 49 [2020-10-28 14:36:53,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:53,209 INFO L481 AbstractCegarLoop]: Abstraction has 869 states and 1216 transitions. [2020-10-28 14:36:53,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:36:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1216 transitions. [2020-10-28 14:36:53,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:36:53,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:53,211 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:53,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 14:36:53,211 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:53,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:53,212 INFO L82 PathProgramCache]: Analyzing trace with hash -614742442, now seen corresponding path program 5 times [2020-10-28 14:36:53,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:53,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706910615] [2020-10-28 14:36:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:53,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:53,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:53,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:36:53,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:53,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-28 14:36:53,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:53,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:53,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:36:53,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:36:53,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:36:53,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:53,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:53,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:53,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:53,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:53,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:53,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:36:53,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:53,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:53,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:53,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:53,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:53,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:53,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706910615] [2020-10-28 14:36:53,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:53,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:36:53,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031929804] [2020-10-28 14:36:53,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:36:53,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:53,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:36:53,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:36:53,874 INFO L87 Difference]: Start difference. First operand 869 states and 1216 transitions. Second operand 13 states. [2020-10-28 14:36:56,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:56,698 INFO L93 Difference]: Finished difference Result 1284 states and 1732 transitions. [2020-10-28 14:36:56,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:36:56,699 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-28 14:36:56,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:56,705 INFO L225 Difference]: With dead ends: 1284 [2020-10-28 14:36:56,705 INFO L226 Difference]: Without dead ends: 1280 [2020-10-28 14:36:56,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:36:56,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2020-10-28 14:36:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1136. [2020-10-28 14:36:57,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1136 states. [2020-10-28 14:36:57,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1576 transitions. [2020-10-28 14:36:57,023 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1576 transitions. Word has length 51 [2020-10-28 14:36:57,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:57,023 INFO L481 AbstractCegarLoop]: Abstraction has 1136 states and 1576 transitions. [2020-10-28 14:36:57,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:36:57,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1576 transitions. [2020-10-28 14:36:57,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:36:57,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:57,025 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:57,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 14:36:57,025 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:57,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:57,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1186255146, now seen corresponding path program 5 times [2020-10-28 14:36:57,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:57,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59270127] [2020-10-28 14:36:57,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:57,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:57,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:57,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:36:57,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:57,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-28 14:36:57,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:57,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:57,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:36:57,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:36:57,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:36:57,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:57,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:57,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:57,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:57,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:57,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:57,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:36:57,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:57,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:57,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:57,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:57,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:57,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:57,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59270127] [2020-10-28 14:36:57,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:57,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:36:57,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804072677] [2020-10-28 14:36:57,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:36:57,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:58,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:36:58,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:36:58,000 INFO L87 Difference]: Start difference. First operand 1136 states and 1576 transitions. Second operand 15 states. [2020-10-28 14:37:00,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:00,451 INFO L93 Difference]: Finished difference Result 1354 states and 1815 transitions. [2020-10-28 14:37:00,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:37:00,452 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-28 14:37:00,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:00,458 INFO L225 Difference]: With dead ends: 1354 [2020-10-28 14:37:00,458 INFO L226 Difference]: Without dead ends: 1350 [2020-10-28 14:37:00,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:37:00,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2020-10-28 14:37:00,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1156. [2020-10-28 14:37:00,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1156 states. [2020-10-28 14:37:00,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1606 transitions. [2020-10-28 14:37:00,803 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1606 transitions. Word has length 51 [2020-10-28 14:37:00,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:00,803 INFO L481 AbstractCegarLoop]: Abstraction has 1156 states and 1606 transitions. [2020-10-28 14:37:00,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:37:00,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1606 transitions. [2020-10-28 14:37:00,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:37:00,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:00,805 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:00,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 14:37:00,805 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:00,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:00,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1388728874, now seen corresponding path program 6 times [2020-10-28 14:37:00,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:00,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411321022] [2020-10-28 14:37:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:00,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:01,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:01,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:37:01,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:01,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-28 14:37:01,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:01,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:01,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:37:01,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:37:01,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:37:01,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:01,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:01,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:01,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:01,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:01,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:01,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:37:01,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:01,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:01,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:01,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:01,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:01,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:01,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411321022] [2020-10-28 14:37:01,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:01,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:37:01,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486911334] [2020-10-28 14:37:01,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:37:01,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:01,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:37:01,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:37:01,730 INFO L87 Difference]: Start difference. First operand 1156 states and 1606 transitions. Second operand 15 states. [2020-10-28 14:37:03,585 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-28 14:37:04,217 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-28 14:37:04,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:04,800 INFO L93 Difference]: Finished difference Result 1463 states and 1953 transitions. [2020-10-28 14:37:04,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:37:04,801 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-28 14:37:04,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:04,807 INFO L225 Difference]: With dead ends: 1463 [2020-10-28 14:37:04,807 INFO L226 Difference]: Without dead ends: 1459 [2020-10-28 14:37:04,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:37:04,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2020-10-28 14:37:05,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1209. [2020-10-28 14:37:05,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1209 states. [2020-10-28 14:37:05,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1684 transitions. [2020-10-28 14:37:05,156 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1684 transitions. Word has length 51 [2020-10-28 14:37:05,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:05,157 INFO L481 AbstractCegarLoop]: Abstraction has 1209 states and 1684 transitions. [2020-10-28 14:37:05,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:37:05,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1684 transitions. [2020-10-28 14:37:05,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:37:05,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:05,159 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:05,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 14:37:05,159 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:05,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:05,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1960241578, now seen corresponding path program 7 times [2020-10-28 14:37:05,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:05,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297727834] [2020-10-28 14:37:05,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:05,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:05,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:06,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:06,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:37:06,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:37:06,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1032 [2020-10-28 14:37:06,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:06,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:06,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:37:06,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:37:06,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:37:06,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:06,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:06,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:06,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:06,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:06,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:06,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:37:06,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:06,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:06,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:06,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:06,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:06,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:06,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297727834] [2020-10-28 14:37:06,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:06,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:37:06,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523631036] [2020-10-28 14:37:06,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:37:06,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:06,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:37:06,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:37:06,871 INFO L87 Difference]: Start difference. First operand 1209 states and 1684 transitions. Second operand 17 states. [2020-10-28 14:37:09,209 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-28 14:37:12,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:12,247 INFO L93 Difference]: Finished difference Result 1532 states and 2033 transitions. [2020-10-28 14:37:12,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 14:37:12,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2020-10-28 14:37:12,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:12,255 INFO L225 Difference]: With dead ends: 1532 [2020-10-28 14:37:12,255 INFO L226 Difference]: Without dead ends: 1528 [2020-10-28 14:37:12,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 14:37:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2020-10-28 14:37:12,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1221. [2020-10-28 14:37:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1221 states. [2020-10-28 14:37:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1700 transitions. [2020-10-28 14:37:12,622 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1700 transitions. Word has length 51 [2020-10-28 14:37:12,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:12,622 INFO L481 AbstractCegarLoop]: Abstraction has 1221 states and 1700 transitions. [2020-10-28 14:37:12,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:37:12,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1700 transitions. [2020-10-28 14:37:12,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:37:12,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:12,624 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:12,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 14:37:12,624 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:12,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:12,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1249734954, now seen corresponding path program 8 times [2020-10-28 14:37:12,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:12,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136509535] [2020-10-28 14:37:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:12,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:12,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:13,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:14,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:14,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:37:14,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:37:14,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1803 [2020-10-28 14:37:14,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:14,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:14,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:37:14,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:37:14,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:37:14,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:14,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:14,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:14,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:14,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:14,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:14,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:37:14,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:14,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:14,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:14,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:14,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:14,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:14,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136509535] [2020-10-28 14:37:14,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:14,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:37:14,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534864962] [2020-10-28 14:37:14,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:37:14,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:14,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:37:14,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:37:14,949 INFO L87 Difference]: Start difference. First operand 1221 states and 1700 transitions. Second operand 16 states. [2020-10-28 14:37:17,737 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-28 14:37:18,031 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-28 14:37:22,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:22,386 INFO L93 Difference]: Finished difference Result 1724 states and 2248 transitions. [2020-10-28 14:37:22,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-28 14:37:22,388 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-28 14:37:22,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:22,394 INFO L225 Difference]: With dead ends: 1724 [2020-10-28 14:37:22,395 INFO L226 Difference]: Without dead ends: 1720 [2020-10-28 14:37:22,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=503, Invalid=3787, Unknown=0, NotChecked=0, Total=4290 [2020-10-28 14:37:22,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2020-10-28 14:37:22,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1203. [2020-10-28 14:37:22,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1203 states. [2020-10-28 14:37:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1673 transitions. [2020-10-28 14:37:22,763 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1673 transitions. Word has length 51 [2020-10-28 14:37:22,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:22,763 INFO L481 AbstractCegarLoop]: Abstraction has 1203 states and 1673 transitions. [2020-10-28 14:37:22,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:37:22,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1673 transitions. [2020-10-28 14:37:22,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:37:22,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:22,765 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:22,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 14:37:22,766 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:22,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:22,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1536594856, now seen corresponding path program 9 times [2020-10-28 14:37:22,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:22,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749928413] [2020-10-28 14:37:22,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:22,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:22,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:23,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:24,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:24,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:37:24,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:37:24,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1852 [2020-10-28 14:37:24,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:24,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:24,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:37:24,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:37:24,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:37:24,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0